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326X Series Modem Reference Guide

1. ACCESS SECURITY PW Verify Callback Rem Num Rqrd Group PW Tone Sim Ring Dial Rstrct NETWK CNTL OPT S Override Mode NC Address NC Port Rate Pass Thru RMT CONFIG OPT S RmtAcc Enable Disable Options and Displays Worksheet B 5 Numerics 108 1 circuit 1 20 108 2 circuit 1 20 116 circuit and restoral 2 13 140 circuit 1 69 141 circuit 1 68 25 pin 1 72 801C Bell auto call unit 3 33 A aborting remote configuration session 1 83 1 86 Accept RDL option 1 31 access security entering group password 1 101 password verification 1 103 procedure for 2 29 select tones for 1 102 ACCESS SECURITY menu 2 28 figure 2 28 ACCESS SECURITY OPT S menu options with AT command equivalents 2 28 ACU LPDA2 3 22 ACU Auto Call Unit Bell 801C 3 33 Codex 2207 3 33 ACU OPT S menu 2 15 AT command equivalents 2 16 ACU Select option 2 16 Adaptive Rate option 1 50 address setting 2 40 addressed mode and V 25 bis control signaling 3 17 with V 25 bis ACU 3 7 ALP EIA TIA signal status description 1 37 Answer command 1 49 Answer in Restoral option 1 51 answer modem configuring for callback 2 30 2 31 without callback 2 30 Answer option 1 49 Answer Originate mode 1 53 selecting using the Mode option 1 53 answering directly using V 25 bis ACU 3 20 answering during restoral 2 12 Index A Continued ans
2. 2 35 Nerwork Omit Ol AOdIGSBa aaro eias toten disais pO eR GLE 2 35 Newark tono Port Bleue esie Uo ree PUE rE CERO Past AS 2 36 Pies UNI RC A EE 2 36 Remote Conlbourauof OPM Ons scccenswsccsessverentsnntencvenevuecsastinesuseassesrsesammeenerse 2 37 Setting a Remote Modem s Leased Line Address 2 40 Searching for a Remote Modem s Leased Line Address 2 41 Setting or Searching for a Remote Modem s Leased Line Address 2 43 Pertormug NUniet EBUN aue aus b bester Pre DE esas omens 2 45 2 1 Introduction 2 2 This chapter describes the 326X Series Modem front panel options that do not have an associated AT command It is organized to follow the structure of the front panel menu tree see your 326X Series Modem Reference Card for a schematic description of the front panel menu tree Each main menu is designed to address a specific modem function For example all options involved with error correction and data compression are found in the EC DC OPT S Error Correction Data Compression menu NOTE For an in depth discussion of how to use the front panel keys and how to navigate the front panel menu tree see Chapter 3 Getting Started in the 326X Series Modem User s Guide This chapter includes descriptions that consist of A submenu of the front panel menu structure illustrating the location of the options in the front panel menu tree This subm
3. 3 16 V 25 bis Control Signaling in Addressed Mode 3 17 taled OILY e EUN 3 17 Dialog SFG e 3 18 ens ainsi E ideas 3 18 Data State 3 19 Discon cine PENNE RO I Cae ee aaa 3 19 biduo c M 3 20 BYU PMS MINE caosa cavae Seater Ged rtv Cop Di ec LEGIS ELcs as FERME E 3 20 Direct Pli m r 3 20 Manual Sgisswenng and DISDE sia ad oi cti prre Ee DR Fete sod etr oak ou d 3 20 Manual AnSWFUBE 1i bore nc nitprr ten T eda ppm bcp dante Hives P sR dci 3 21 Nianwal Dialing uices e va ree robin er eoa teg Cuda EEE NE PTEE Eri E RT 3 21 EPPA II Set asri 3 22 Howto toglie It LEA AG Us ices ions UP am anne 3 22 LPDASACLI Camo Con vili S ai cecuis cetero bie PIRE DH e ot abuti 3 22 LPDA Message FOA MP 3 23 Information Field Format and Command aee 3 23 Di Peed o da NATRI TR Ti E To or 3 24 rs mI qu EE T SEE 3 24 Modem Address A his cevadtrincrcnarpercnalsneinels e presb beri kE naas ESENE 3 24 Commend Code C uua sea eI RR EARTH C OS REOR DELL CRM UE CUR ca dd 3 24 Eus DUI ET a onis ente eee Eva Ep t erin mnt ne Emer EON Dor E reer Le t ant ne tent 3 24 Automatic Calling Interfaces 3 1 Contents continued Information Field Format and Resporse ascen nce tertie ettet Header Hi Response Field 5 Her
4. ASCII Decimal Symbol ASCII Hex EBCDIC Hex 110 n 6E 95 111 o 6F 96 112 p 70 97 113 q 71 98 114 T 72 99 115 S 73 A2 116 t 74 A3 117 u 75 A4 118 V 76 A5 119 w TI A6 120 X 78 A7 121 y 79 A8 122 Z 7A A9 123 7B CO 124 7C 4F 125 7D DO 126 TE Al 127 DEL TF FF A 4 ASCII EBCDIC Hexadecimal Equivalents Appendix B Options and Displays Worksheet Introduction Use this configuration worksheet to record the front panel option settings and displays of your 326X Series Modem This worksheet is organized to follow the structure of your modem front panel tree This worksheet does not list front panel options that do not have configurable settings such as Reinit Memory or Enter Then Dial For defaults see the 326X Series Modem Reference Card Make copies of this worksheet as necessary to record option settings and displays of other 326X Series Modems in your network 326X Series Modem Options and Displays Worksheet Location Date Select Options Save Changes Power Up In Dial From View Phone Enter Phone l 2 3 4 5 6 7 8 9 Link Phone l 3 4 5 6 J 8 9 Options and Displays Worksheet B 1 Auto Redial S Register 0 S Register 1 S Register 2 S Register 3 S Register 4 S Register 5 S Register 6 S Register 7 S Register 8 S Register 10 S Register 11 S Register 12 S Register 18 S Registe
5. Pressing wy again brings you to the Transmit Tx and Receive Rx Throughput and Link Utilization Status displays Txexxx x kb yyy Rx xxx x kb yyy These displays provide the modem s throughput rate in kilobits and the total percent of the analog channel currently being used for transmitting and receiving data The throughput rate is a running average of the data bit rate through the modem based on the most recent data transmitted to and received from the DTE Link utilization is based on the amount of data traffic transmitted and received over the analog channel Link utilization is displayed in terms of the percentage of the channel that is being used Upon disconnection the Transmit and Receive Throughput and Link Utilization Status display shows the throughput and link utilization at the time of disconnection These displays help to identify where delays in data transmission exist whether within the modem or whether an insufficient amount of data is available for transmission For example if the display indicates a 40 kb throughput with a 10 link utilization then there is not enough data available for transmission Alternately if a 40 kb throughput is displayed with 100 link utilization then data throughput has been optimized NOTE If Mode Direct ATE SM these displays appear blank amp V xST EIA TIA 232 D CCITT V 24 Signal Status Pressing yw from the Throughput Status brings you to the EIA TIA 232
6. 3 You are now in escape mode To return online enter ATO lt CR gt The remote configuration session is terminated and the remote modem saves changes made to it during the session The Front Panel To use your front panel to terminate a session 1 Display Rmt Cnfg Established 2 Press yw until the modem displays Rmt Cnfg Terminate 3 Press The modem displays RC Complete Aborting a Remote Configuration Session When you abort a remote configuration session changes made to the remote modem s configuration are not saved The AT RC Command To use the AT KRC command to abort a session 1 Enter AT kRC1 lt CR gt 2 Your terminal displays RC ABORTED OK The Front Panel To use your front panel to abort a session 1 Display Rmt Cnfg Established 2 Press wp until the modem displays Rmt Cnfg Abort 3 Press The modem displays RC Aborted 1 86 AT Commands RE AT RE Initiate Terminate Restoral we RESTORAL OPT S ares The AT KRE Restoral command determines how modems operating on a leased line handle initiation of dial restoral The 326X Series provides four different methods of initiating restoral Automatic Manual DTE signal DTE ACU Option Set 4 configures the modem for automatic restoral initiation Restore FP Auto NOTE The Restoral option and its option settings appear on your modem s front panel only if you have the Restoral option installed The 326X
7. Loud os v RJ 16C ww SJ 4MB Y KEY DIALING OPT S L Option Included Countr ySpedfi c in Option Sets Option Figure 2 8 TELCO OPT S Menu Some TELCO OPT S menu options listed below have AT command equivalents which are described in Chapter 1 AT Commands The remaining TELCO OPT S options which you can select only from the front panel are described immediately following this list Options with AT Command Equivalents ATM Speaker ATL Volume AT amp J Telco AT kLC Line Compensation AT kNC Network Compensation Telco Options 2 23 Telco Options Dial Line Transmit Level The DL TX option displays the modem s dial line transmit level which is set for your country s requirements Option Setting Description 0 to 15 Modem is set to transmit at a level in the 0 to 15 dBm range NOTE This setting is country specific In some countries dial line transmit levels are adjustable Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country Leased Line Transmit Level The LL TX option displays the modem s leased line transmit level which is set for your country s requirements Option Setting Description 0 to 15 Modem is set to transmit at a level in the 0 to 15 dBm range NOTE This setting is country specific In some countries leased line transmit levels are adjustable
8. The ATQ Rslt Code command selects whether result codes including Call Progress messages are displayed AT Command Option Setting Setting Enable 0 all Disable Orig 2 Description Result codes are displayed at the DTE Result codes are not displayed at the DTE Result codes are output to the DTE only when operating as an originate modem AT Commands 1 13 S T V ATS S Register Data 9600 T D sere The ATS S Reg xxx command allows you to view and set the various S Registers that are supported by the 326X Series Modems S Registers contain values that determine and reflect how the modem operates and executes commands You can view and change S Register values via the AT commands described in this section or through the front panel option If an invalid S Register is entered the modem responds with an OK but no action occurs See the Performing Numeric Entry section in Chapter 2 for details on how to use numeric entry to enter the appropriate S Register For a full description of S Registers see the S Registers section in Chapter 5 of the 326X Series Modem User s Guide ATT Dial Type See the ATP command description described earlier ATV Result Code Format v Las 1 14 AT Commands The ATV RsltForm command selects the format of result codes that are sent to your DTE AT Command Option Setting Setting Description Numeric 0 Result codes are sent to your DTE as numbers s
9. ficcesssecurTy gt e e o number is required when using the AT ZC Callback option This option is applicable if the Callback option is set to Remote or Rmt Ind only AT Command Option Setting Setting Description Off all 0 A remote callback number is not required If the calling modem does not provide a callback number the modem attempts to establish a connection without hanging up or calling back On 1 A remote callback number is required The modem does not attempt to make a connection or callback if no callback number is provided 1 102 AT Commands AT ZS Simulated Ringback ZS xZV v ACCESSSECURITY Aare The AT ZS Sim Ring command determines if the answer modem sends a ring back tone to the calling modem prior to sending an answer back tone Immediately after entering the access security password some modems for example the 2234 Modem expect to receive a ringback tone from the answering modem AT Command Option Setting Setting Disable 0 all Enable 1 AT ZV Password Verification Description No ringback tone is sent to the remote modem prior to sending an answer back tone After receiving the access security password the answer modem sends a ringback tone to the remote modem prior to sending an answer back tone The answer modem does not send a ringback tone to the remote modem when the answer modem hangs up prior to a callback v ACCESSSECURITY 21g PW Verify The ATXZV PW V
10. OS PE PF AT OS Overspeed v TERMINAL OPT S p vwa The AT K OS Overspeed command allows the modem to compensate for DTE overspeed Some asynchronous DTEs send data to the modem faster than specified a condition known as overspeed Option AT Command Setting Setting Description 1 096 0 The modem compensates for DTE overspeed up to 1 096 all 2 5 1 The modem compensates for DTE overspeed up to 2 5 AT PE Enable Disable Password Protection wv FP SECURITY e The AT PE Password command enables and disables the Password function Once you have enabled the Password function set protection in order to lock the modem see AT K PF AT Command Option Setting Setting Description Enable 1 AT KPE1 enables password Disable 0 AT PEO disables password When you set protection you must use a password before you can access the protected functions Otherwise you do not need to enter a password to access any modem function Refer to the AT PW command for details on creating and changing a password AT PF Set Protection PER 1 80 AT Commands The AT amp PF Set Protection command allows you to set protection in order to lock the modem Refer to the AT PN command for details on entering a password AT Command Option Setting Setting Description Set Protection ATKPF Use the AT KPF command to lock your modem The Front Panel After you have enabled the password function explained in the AT
11. Table 3 4 DTR Option Settings Call Establishment Method DTR Option Setting Addressed DTR 108 2 or DTR High Direct DTR 108 1 Tail Manual DTR 108 2 or DTR High If you plan to use the addressed mode make sure that the options in the ACU OPT S menu are set appropriately These options make the V 25 bis ACU in the modem compatible with your DTE 3 6 Automatic Calling Interfaces Addressed Mode To use the addressed mode you must set the DTR option of the front panel display to Esc Disc High or 108 2 With the DTR option set to High the modem is always ready to execute V 25 bis commands On to off DTR transitions from the DTE do not disconnect the modem from the line If the DTR option is set to 108 2 the DTE must turn DTR from off to on before the modem can execute V 25 bis commands On to off DTR transitions disconnect the modem from the telephone line Throughout the following sections all sample commands are shown in uppercase letters However you may enter commands in either uppercase or lowercase letters V 25 bis Commands The V 25 bis command set allows you to dial calls answer incoming calls and perform other important ACU functions from your DTE Table 3 5 describes each command Table 3 5 V 25 bis Commands Command Description CIC Connect Incoming Call This command instructs the modem to connect to an incoming call When you enter this command the modem answers an incoming call immediately
12. XO XO XO NO SO XO XO OO OO OO OO OO OO OO OO OO OO CONNNDF BPWWNK OANDANAWWNN KE jen l m p j C O O Vo oo 1 101 1 101 1 102 1 102 1 103 1 103 AT AT amp and AT Command Descriptions This chapter provides an alphabetic list of the AT commands that you can execute from the control terminal and the modem front panel AT commands and options are described in the following sequence A pull out main menu figure Figure 1 1 illustrating all AT AT amp and AT command settings front panel options and option settings A front panel option figure in the left margin describing how to select a command on the modem front panel Industry standard AT and AT amp commands that begin with AT e Motorola enhanced AT commands which begin with AT A list of the menu s front panel options if any that have AT equivalent control terminal commands NOTES 1 For descriptions of front panel options and option settings that do not have AT command equivalents see Chapter 2 Front Panel Operation Chapter 2 is organized to follow the structure of the front panel menu tree the main menu is divided into submenu sections describing the appropriate options and settings For a list of AT commands that do not have front panel equivalents see Non Configuration AT Commands in Chapter 5 Using the AT Automatic Calling Interface of the 326X Series Modem User s Guide 2 Throughout this guide all references to t
13. see S Registers section in Chapter 5 of the 326X Series Modem User s Guide In short form only the suffixes and settings of each nonaction AT command are shown and S Register values are displayed in the following format 010 024 This means that S Register 10 is set to decimal value 24 The Front Panel Your front panel provides some or all of the following information Operating Status DTE DCE Rate Status Error Correction Data Compression and Transmit and Receive Throughput and Link Utilization Status E A TIA 232 D CCITT V 24 Signal Status and CQMS Parameter Status AT Commands 1 31 amp V xST 1 32 AT Commands Operating Status Messages Operating Status messages display the operating status of the modem NOTE The modem automatically displays one of the operating status messages in Table 1 1 ifa front panel key is not pressed within five minutes The R indicates a restoral connection and H indicates a hold of the dial line You can also view Operating Status messages by pressing W until you reach the Home position Table 1 1 Operating Status Messages Message Description Data rate Data rate Data rate Dialing Disconnect LAL rate LAL Training Test rate Bad LAL Busyout Dial Wait Link Wait Redial Wait Callbk Wait Ranging Training Retraining Synchronizing Tone Detect Disc Wait Disc Rx Wait Disc Tx Wait Off Hook WAIT rate T D T D
14. 2 36 2 37 2 40 2 41 2 43 2 45 Contents continued Chapter 3 Automatic Calling Interfaces Ine 3 3 bru d Ue TT 3 3 Call Establishment Methods 12 1 ttt ttt reiner o peres 3 6 Modem on eurati nt oo ooo cu eoo d eor deo e ro pode Fed ma epee alas 3 6 Addressed MOS bite tp arts R ERE E NER E DOO Ned PUE KME 3 7 Tce Fi enis RR 3 7 Wize Dis RESPONSES e 3 10 CUT Faute RESPONSES today tients aii cee ee aed 3 11 Lal Progress Responses 222 onde c er Ooh ibe n REEL RE 3 12 Result Code Response Spoerri ranee innen ene I Rh psi CH REEL n Er EEA 3 12 Reliable Connection Response 22er rep itte pter pe rcr L pter eines 3 13 Programming Guide for the V 25 bis Auto Call Unit ACU 3 13 Asynchronous Frame Format i222 eerte P PL ere IRE 3 14 Synchronous Bit Oriented Frame Format eese 3 15 Synchronous Character Oriented Frame Format 3 16 V 25 bis Control Signaling in Addressed Mode 3 17 idie Condition 1st o ror tiep ese pc tbe D Ata be Hexe a 3 17 Dialog SVa NN n 3 18 Connecting rg 3 18 Dara SE qe 3 19 bcn ip aee eann a A 3 19 Direret Male coctis on pecie Grades God ty eos ni teer y ENET ln pna AETA STEL eO 3 20 Dirett AMS cuir RR 3 20 Einer DEBES occa n big pacer is ony ci ecu UL on Has Eo abu Peer ie Fabro ean 3 20 Manual Answering a
15. 45 degrees with 0 meaning there is no phase jitter Frq Offset Measured in Hz frequency offset is a measure of the incoming signal s deviation from normal carrier frequency This condition is caused by two data carrier systems being out of tune with each other Frequency offset is also called frequency shift All operating modes cancel out any frequency offset on the line For example if 1 Hz of frequency offset is detected on the line all received signals are adjusted by 1 Hz Tx Level Measured in dBm transmit level is a measure of the power of the transmitted signal Transmit level displays the strength of the signal the 326X Series is transmitting in decibels relative to 1 mW It measures the power level of the signal leaving the device s transmitter Rx Level Measured in dBm receive level is a measure of the power of the received signal This parameter displays the strength of the signal the 326X Series is receiving in decibels relative to 1 mW Receive level measures the power level of the signal entering the device s receiver Acceptable receive level varies with the carrier detect selection Retrains This parameter displays the number of training sequences that have occurred between the local and remote device for each single line connection The 326X Series may retrain due to a user initiated retrain request using the Test option a user initiated retrain request using the Max Rate and Min Rate options and a modem initiated r
16. Mode AT K EC Error Correction and the AT DC Data Compression options EC DC OPT S category are set the same in both the answer and originate modems If your local and remote 326XFAST SDC Modems are configured for synchronous data compression operation by selecting Fast Call Lv13 the modems use LAPM error correction with V 42 bis data compression only For proper operation be sure to enable this option in both the local and remote modems and ensure that the AT SM Mode is set the same in both the answer and originate modems Default with the 326XFAST SDC Modem AT Commands 1 63 FL AT FL Flow Control v The AT FL Flow command allows the modems and DTEs in a link to control the Erma oers p e e flow of data when buffers near their capacity Use some type of flow control when operating in the Normal or Reliable mode Check the DTE s manual to ensure that the DTE supports the type of flow control you select Option AT Command Setting Setting Description Off 0 Flow control is disabled XON XOFF 1 The local modem and DTE operate flow control by all passing characters embedded in the data stream between them The XOFF character signals the transmitting device to stop sending data The XON character allows the halted device to start sending data NOTE XON XOFF flow control is not supported in the 326XFAST synchronous data compression mode If synchronous data compression is enabled and you select XON XOFF the mo
17. The transmit clock is stopped when the buffers are full inhibiting the flow of data from the DTE It is started again when buffer space is available NOTE This option is operational only when internal timing has been selected Clock Internal AT amp X Default with the 326XFAST SDC Modem AT Commands 1 65 x HD AT HD Hold Dial Line v RESTORAL OPT S vwa Hold Dialine 1 66 AT Commands The AT HD Hold Dialine command forces the modem to hold a dial restoral connection while testing a leased line connection This command applies to modems configured for restoral While operating in dial restoral the modem periodically returns to the leased line according to the time interval specified in the Dial to Leased option to test the line in an attempt to reestablish the leased line connection If during 21 seconds the modem fails to qualify the leased line data transmission resumes on the held dial line If the modem successfully establishes a valid connection on the leased line within 21 seconds it holds the dial restoral connection for the period of time set in the Hold Dialine option The modem passes data on the leased line while holding the dial line If a retrain occurs while the modem is testing the leased line the test is terminated and the modem returns to the dial line After the timer expires if the leased line is qualified the dial line is dropped and data transmission resumes on the leased line If
18. auto reliable data transfer mode 1 94 B Bad LAL message 1 32 Bell 103 modulation mode selecting 1 74 specification for 5 4 Bell 212 modulation mode selecting 1 74 specification for 5 3 Bell 801C auto call unit use with 326x modems 3 33 Blind Dial option 1 52 break handling 1 53 Break option 1 53 Buffer Delay option 1 56 Buffer option 1 77 Busy Out message 1 32 with Local Analog Loopback test 1 70 Busy Out test 1 11 starting from the front panel 4 18 starting with AT commands 4 18 C cable diagnostics 4 20 call failure during dial restoral 2 12 call failure responses CFIAB 3 11 CFICB 3 11 CFIET 3 11 CFIFC 3 11 CFINS 3 11 3 12 CFINT 3 11 3 12 CFIRT 3 11 3 12 DLCxxx 3 11 call progress responses None 3 12 V 25 bis 3 12 V 25 rate 3 12 VAL only 3 12 Call Progress messages and the ATX command 1 15 call progress messages and the Call Progress option 1 15 Call Timeout option 1 98 callback 2 29 DTMF equivalencies 2 33 for answer modem without 2 30 number remote 1 102 with manual dialing 2 33 with originate only modem 2 33 with originate only modem 2 33 Callback option 1 100 Callback Wait message 1 32 calling modem configuring for callback 2 31 CCITT V 22 bis See V 22 bis CCITT V 24 Signal Status 1 37 CCITT V 32 bis See V 32 bis CCITT V 32 See V 32 CFIAB 3 12 CFICB 3 12 CFIET 3 12 CFIFC 3 12 CFINS 3 12 CFINT 3 12 CFIRT 3 12 changing password 1 82 Char Length option 2 18 circuit 117 pin 16 2 9 circu
19. 11 J jack types for dial line 1 24 L LAL 4 5 starting from the front panel 4 6 starting with AT command 4 7 LAL Busy Out option 1 70 LAL Pat 4 8 starting from the front panel 4 8 starting with AT command 4 9 LAPM 1 62 Reliable mode and 4 15 4 17 LDL 4 16 starting from the front panel 4 17 starting with AT command 4 17 leased line address setting for remote modem 2 40 setting for remote modem s 2 43 selecting 1 25 transmit level 2 24 Leased to Dial option 1 59 line compensation 1 68 Line option and dial restoral 2 10 line type 1 25 selecting with AT amp L 1 25 selecting with the Line option 1 25 Link Utilization Status display 1 36 linking telephone numbers 1 70 LL TX option 2 24 Local Access Protocol for Modems See LAPM local analog loopback pattern test See LAL Pat local analog loopback test See LAL local digital loopback test See LDL locating modem serial number 2 44 locking the modem AT PF 1 80 Index 7 L Continued longspace disconnect 1 18 Longspace option 1 18 and dial restoral 2 12 interaction with PSTN option 1 73 loopback transmitter timing 1 47 Low Speed option 1 71 low speed modulation mode 1 71 LPDA2 address 2 19 determination 2 20 identification number 2 20 LPDA2 ACU commands 3 22 configuring 3 22 control commands 3 22 dial command 3 27 format 3 27 sense bytes 3 30 error codes 3 30 dial modifiers 3 28 dial response data field 3 31 disconnect command 3 31 sense byte 3 31 disconne
20. 18 ACU Options The Sync Idle option applies to synchronous applications only direct synchronous or SDC operating modes Your modem sends Marks or Characters on EIA TIA 232 D Pin 3 V 24 Circuit 104 to the DTE when it has no messages to send Option Setting Description Mark Modem sends continuous Marks or one bits on EIA TIA 232 D Pin 3 V 24 Circuit 104 to the DTE when it has no messages to send Char This option setting applies to V 25 bis LPDA2 and ACUs If the all modem is configured for V 25 bis and the V25Form option is set to Charsync it sends a continuous stream of SYN synchronizing Characters on EIA TIA 232 D Pin 3 V 24 Circuit 104 when it has no messages to send If the V25Form option is set to Bitsync the modem sends continuous flags 7E hexadecimal when it has no messages to send If the modem is configured for LPDA2 the modem sends continuous flags 7E hexadecimal when it does not have a message to send ACU Options V 25 bis Responses When using the V 25 bis ACU the modem always indicates a valid connection after the local modem and remote modem switch to data mode This is accomplished by turning DSR EIA TIA 232 D Pin 6 V 24 Circuit 107 and DCD EIA TIA 232 D Pin 8 V 24 Circuit 109 from off to on In addition to this hardware response you can receive an indication of call progress at your DTE The V25 Resp option chooses the response you receive Option Setting Description V25 bis Mode
21. 19 200 16 800 14 400 12 000 9600 7200 4800 2400 1200 300 amp V xST The DTE Status IDs are explained below Error Correction Status RELIABL SYNREL DIRECT NORMAL COMMAND FAILREL ATTEMPT Description The modem is online and operating in an asynchronous error correcting data transfer mode The modem is online and operating in a synchronous error correcting data transfer mode SDC Mode The modem is online and operating in the direct data transfer mode The modem is online and operating in the normal data transfer mode The modem is in command mode and does not have a connection Reliable negotiation failed The modem is attempting to establish a reliable connection Error Correction and Data Compression Status Pressing wy from the DTE Status display brings you to the Error Correction and Data Compression Status display The following definitions apply EC Message Description LM The modems are connected and using LAPM error correction M1 M4 The modems are connected and using MNP error correction level 1 2 3 or 4 NONE No error correction is being used DC Message Description V42bis The modems are connected and using V 42 bis data compression MNP5 The modems are connected and using MNP Level 5 error correction NONE No data compression is being used AT Commands 1 35 amp V ST 1 36 AT Commands Transmit and Receive Throughput and Link Utilization Status Display
22. 2 In the TERMINAL OPT S menu set the DTR option to 108 2 or High 3 In the ACU OPT S menu set the Answer option to Manual 4 In the ACU OPT S menu set the Default Dial option to Off To answer a call manually use the following procedure 1 If the DTR option is set to 108 2 raise the DTR signal at the DTE 2 Answer the call using the telephone connected to the same dial line as the modem 3 Press W twice to get to the Home display Press to connect the modem to the line 4 The modem goes off hook and sends answer back tone 5 To disconnect from the line press If the DTR option is set to 108 2 you can disconnect by turning the DTR signal from the DTE from on to off Manual Dialing To configure your modem for manual dialing use the following procedure 1 In the MODULATION OPT S menu set the Mode option to Originate 2 In the TERMINAL OPT S menu set the DTR option to 108 2 or High 3 In the ACU OPT S menu set the Default Dial option to Off To dial a call manually follow this procedure 1 If the DTR option is set to 108 2 raise the DTR signal at the DTE 2 Dial the call using the telephone connected to the same dial line as the modem 3 Press M7 twice to get to the Home display Press to connect the modem to the line 4 The modem goes off hook and waits for answer back tone 5 To disconnect from the line press If the DTR option is set to 108 2 you can also disconnect by turning the DTR signal
23. 3260 in data response 7855 Sends 7855 in data response LPDA2 Determination This selection allows for the modem to recognize the LPDA2 commands in the data stream Option Setting Description Disab LPDA2 command frames are not recognized as commands Enab LPDA2 commands are recognized in the data stream and the commands are processed Terminal Options 2 20 Terminal Options Figure 2 7 illustrates the TERMINAL OPT S menu TERMINAL OPT S menu options control signals between a co located modem and DTE ACU OPT S Terminal Options 4 A TERMINAL 0 Y 128 0 1152 96 0 DTRICTS XONJXOFF 76 0 72 0 64 0 XON XOFF PT RTSICTS 316 TxCk 56 0 48 0 38 4 28 8 264 240 216 19 2 16 8 144 120 b TpDlyMin Rx Clk hd RxD Diy x Off gt SpeedCon ver n RTS High w Es w Off y Nor mal Discon Remote Reset Tail 108 1 108 2 AT KCT I CTS High Nor mal ACU On AsynS ync ATAS RemR TS DCD Code wo Ov erspeed 1 15 00 90 Remote Wink 3s 2 5 SI DIR Drop On Disc Sim ulate LL DTR Dela y 525 v 10 sec v 15 sec TELCO OPT S DTE Ct140 0ff DTE Ct141 0ff WwW we On on DTE Pin 25 Busy WwW Test I Ext Select Off gt Inactivity 0 ff id 33min 10min 20min 30min ww 530min KEY Option Included in Opti
24. 5 illustrates the EC DC OPT S menu EC DC OPT S menu options control the parameters and protocol your modem uses to set the error correction or data compression scheme REST ORAL OPT S v AT KNB Buff ers Regular v Reduced AT KSM Mode Direct AT SK EC I I i gt EC DC OPT S Nor mal Reliab le Auto Rel Spd A utoRel y ACU OPT S I gt AT KDC DC Enab led v Disab led AT KBK Break Destr uct AT KDF Data F orm NRZ v z gt gt I gt x Expedited X Standard AT gt DB Dela y Off AT KSL EC ID Def ault Ib I gt Ib Cw Buf or 38 Code x Buf amp 38 KEY A 538 Option Included in Option Sets Figure 2 5 EC DC OPT S Menu All EC DC OPT S menu options listed below have AT command equivalents which are described in Chapter 1 AT Commands Options with AT Command Equivalents AT BK Break Handling AT KDB Delay Buffer AT kDC Data Compression AT DF Data Format AT KEC Error Correction AT gt MF Modem Flow Control AT KNB Buffers AT KSL Error Correction ID AT SM Mode 2 14 Error Correction and Data Compression Options ACU Options ACU Options Figure 2 6 illustrates the ACU OPT S menu ACU OPT S menu options control how you configure operate and test your modem using the AT LPDA2 or V 25
25. ACU Selection 2 16 ACU Options The ACU Select option determines which Auto Call Unit ACU the modem uses NOTE To enable 326XFAST SDC choose one of the ACU settings described below select a bit synchronous data format and select one of the reliable data transfer modes Reliable Auto Reliable or Speed Auto Reliable using the Mode AT E SM option Option Setting Description AT The AT auto call unit is used 1 To enable 326X FAST SDC after selecting AT ACU make sure you select a proper data format using the AT Form AT amp M command The valid selections for synchronous data formats are Sync Data DTR Dial or Man Dial Refer to Chapter 1 AT Commands of this guide for additional detail on the AT amp M option V25b The V 25 bis auto call unit is used 3 To enable 326XFAST SDC after selecting V25b make sure you select a proper data format using the V 25 Form command discussed in the next section The valid selections for V 25 bis data formats are AsynSync or Bitsync LPDA The LPDA 2 auto call unit is used After selecting LPDA LPDA transmits data synchronously to enable 326XFAST SDC you need only to select one of the reliable data transfer modes Reliable Auto Reliable or Speed Auto Reliable using the Mode AT gt SM option None No auto call unit is used 2 4 To enable 326XFAST SDC after selecting None make sure you choose the synchronous data format using the NoACU Form option discussed later in
26. Command Setting Setting Description Off 0 The modem does not busy out the line during a all local analog loopback test allowing incoming calls to ring On 1 The modem connects to the line during a local analog loopback test making the line appear busy to incoming calls NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country AT LN Link Telephone Numbers Data 9600 T D gt E Link Phone 1 70 AT Commands The AT LN Link Phone command allows you to link telephone numbers that are stored in the modem s telephone book Some remote applications provide more than one telephone number to call if one is busy you can call another If a call attempt to a specified number fails and that number has been linked to another the modem momentarily displays Link Wait and then calls the second linked number NOTE If you enable the AT kLN Link Phone the modem dials linked numbers before redialing see the AT DR section in this chapter The AT LNn m Command You can also line telephone numbers using the AT LN command Enter the AT KLN command followed by the memory location of the number you want to link from n a comma and the number which you want to link m A typical AT LN command entry would look like the following AT KLN2 4 In this example memory location 2 is linked to memory loc
27. D CCITT V 24 Signal Status lines see Table 1 2 for definitions NOTE To the right of each EIA TIA signal in the front panel display window is a box symbol If the box is filled in it indicates that the signal is on If the box is empty the signal is off Table 1 2 EIA TIA 232 D CCITT V 24 Signal Status Messages Abbreviation Signal Name Description DCD RTS CTS DSR DTR AOP DLP ALP Data Carrier Detect Request to Send Clear to Send Data Set Ready Data Terminal Ready Answer Originate Remote Digital Loopback Test Local Analog Loopback Test On The modem is receiving carrier from the remote modem On The DTE is requesting to send data to the modem On The modem is ready to accept data from the DTE On The modem is ready to exchange data On The DTE is ready to exchange data On The DTE is requesting the modem to enter answer mode On The DTE is requesting a remote digital loopback test V 24 Circuit 140 Pin 21 On The DTE is requesting a local analog loopback test V 24 Circuit 141 Pin 18 AT Commands 1 37 amp V xST 1 38 AT Commands Status Summary Line Pressing ww from the EIA TIA 232 D Signal Status display brings you to the Status Summary Line see Table 1 3 for definitions Table 1 3 displays disconnect reasons test indicator answer or originate and dial and leased line status Table 1 3 Status Summary Line Message Defini
28. Denied when you start the test To run a Data Mode Pattern test 1 Use the front panel keys to move through the TEST OPT S menu until the modem displays TEST End Test 2 Press yw until the modem displays TEST Pattern 3 Press The modem displays TEST Pattern 4 Press W twice to reach the home display The modem displays TEST data rate T D For example the modem may display TEST 9600 T D 5 To end the test use the front panel keys to move through the TEST OPT S menu until the modem displays TEST End Test 6 Press The modem displays Bit BIk where the number of bit errors and block errors is displayed If the test was initiated on only one of the modems or the modem s transmitter and receiver were unable to synchronize the pattern the modem displays No Sync Achieved NOTE If the modem begins the test operating in the MNP or LAPM Reliable mode the modem attempts to restore the Reliable mode after the test Testing Your Modem 4 15 Local Digital Loopback AT amp T3 4 16 Testing Your Modem Using remote DTE data for the test the local digital loopback test checks the telephone lines and the circuitry of the remote modem This test loops the data received from the remote modem back to the remote modem Local DTE data is ignored during the local digital loopback test IMPORTANT f operating in 326XFAST SDC mode refer to the 326XFAST Synchronous Data Compression Testing section earlier in this chapter for
29. If you do not answer an incoming call with this command the modem acts according to the Answer option in the ACU OPT S menu of the modem front panel display If you enter the CIC command and there is no incoming call the modem responds with the INV INValid response CRNn Call Requested Number This command instructs the modem to dial the number that follows it Use this command to dial directly from the keyboard of the DTE A typical CRNn command might look like this CRN1 555 123 The telephone number can contain hyphens or spaces the modem ignores them You may enter the dial modifiers described in the previous section to accommodate special dialing requirements If the number entered exceeds 50 digits the modem responds with INV CRSa Call Request with Address This command instructs the modem to dial a number from a specific address in modem memory To dial the number stored in address 5 enter CRS5 You can dial a phone number from any of the modem s memory addresses 1 9 with the CRS command Automatic Calling Interfaces 3 7 Table 3 5 V 25 bis Commands Continued Command Description DIC Disregard Incoming Call This command instructs the modem to disregard an incoming call If you have set the modem for auto answer through the Answer option in the ACU OPT S menu the DIC command overrides this setting for one incoming call If you enter the DIC command and there is no incoming call the modem responds with
30. Leased Line 0 dBm maximum 15 dBm minimum 1 dB e 4 Wire Leased Line 0 dBm maximum 15 dBm minimum 1 dB Dial mode is country specific It is set using the Telco option in the TELCO OPT S menu Values shown above are for the U S only Consult Appendix D Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country Leased line mode is country specific It is set using the LL TX option in the TELCO OPT S menu There is a O dBm maximum Values shown above are for the U S only Refer to Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country Transmitter Timing Internal external or loopback 326X V 32 bis 326X FAST Internal or external 326XFAST SDC Specifications 5 5 5 6 Specifications Appendix A ASCII EBCDIC Hexadecimal Equivalents Table A 1 lists the 7 bit ASCII and 8 bit EBCDIC hexadecimal equivalents of the characters and symbols in the V 25 bis specification Table A 1 ASCII to EBCDIC Translation ASCII Decimal Symbol ASCII Hex EBCDIC Hex 0 NUL 00 00 1 SOH 01 01 2 STX 02 02 3 ETX 03 03 4 EOT 04 37 5 ENQ 05 2D 6 ACK 06 2E 7 BEL 07 2F 8 BS 08 16 9 HT 09 05 10 LF 0A 25 11 VT OB OB 12 FF 0C 0C 13 CR OD 15 14 SO OE OE 15 SI OF OF 16 DLE 10 10 17 XON 11 18 DC2 12 12 19 XOFF 13 20 DC4 14 3C 21 NAK 15 3D 22 SYN 16 32 23 ETB 17 26 24 CAN 18 18 25 EM 19 19 26
31. Motorola recommends that you proofread stored phone numbers after you have entered them into modem memory The modem lists the addresses along with corresponding phone numbers If an address is empty it is not listed A typical list might look like this Enter RLN LSN1 1 234 555 8910 LSN2 1 222 555 4444 LSN3 1 333 555 5555 LSNS 1 555 555 7777 LSN6 1 666 555 8888 LSN7 1 777 555 9999 In this example addresses 1 2 3 5 6 and 7 have numbers stored in them address 4 is empty If all the addresses are empty the modem responds with the LSN message If the RLN command is entered password protection is enabled and the modem is locked the modem responds with the INV message Automatic Calling Interfaces 3 9 V 25 bis Responses When using the V 25 bis ACU the modem responds to the DTE with messages Table 3 6 describes the responses and conditions under which they appear Table 3 6 V 25 bis Responses Response Definition CNX Connection The local modem has negotiated a link with the remote modem INC INcoming Call The modem sends the INC response to the DTE whenever it detects an incoming call INV INValid The modem sends the INV response whenever you enter a command incorrectly or a command that the modem cannot execute For example if you issue the CIC Connect Incoming Call command and the modem does not detect an incoming call the modem responds with INV LSF List of Stored Forbidden numbers
32. NEBULA MEUS 1 81 ARP Change Password ceo riaieiteke ee pepe err ROC PII PME DUU PU a 1 82 ATIRA Remo ACESS ou ciascun uoce E cxi C Hi eb CebbL IBN Eur BR Eu COM a com ebd pDE 1 82 AT RC Initiate Terminate or Abort Remote Configuration Session 1 83 Initiating a Remote Configuration Session with a Dial Modem 1 83 Initiating a Remote Configuration Session with a Leased Line Modem 1 85 Terminating a Remote Configuration Session eese 1 86 Aborting a Remote Configuration Session seen 1 86 AT RRE initiate Terminate Resboral 1 22 ao error eo Ln EP LI eei bbLOS 1 87 APERP NAE UE HET 1 90 ATSEBSIRES Danitol i ecce ta oC DR VOCE cui pe dbi e Lat esse Eo PE BO EM ELULME 1 91 ZU EET AIO RETIN odas a oap CU ED Con bd pua per edis 1 92 ASC US peed otwersTOR accade nta epeee tih Heer d ERECEK EER e ERE PLU ERI FUE RRNA 1 93 FX dira sia d e eiaues 1 93 ATF oL Fror oprec uon ID a Satya tube ease BEC met PEE mete Fr eue Fort rH C beans 1 94 AT Se SM Dara Transtar ModE 224 diroi diet etr brR S bis eEP Paar Hep bes R dus 1 94 APSE RIS DCD Remote Signaling 2 ucc ccestis etr tdite cos ide ete iip e eeeia 1 96 AD ST AT amp V Modem Status Display 1er rrr rtis 1 97 AT TD Throughput Delay Minimization sorsia innan 1 97 ADT L Clone Length 2i retro pc enr P PR REL sivevsiueousessind 1 98 ATTE HE Pues eee mere ere eco itin et har eral E i ee eur ecu 1 98 AT KXC Error Correc
33. Option Included L Countr y Specifi c in Option Sets Option y REST ORALOPT S Figure 2 3 MODULATION OPT S Menu 2 6 Modulation Options Modulation Options All MODULATION OPT S menu options listed below have AT command equivalents which are described in Chapter 1 AT Commands of this guide Options with AT Command Equivalents ATY Longspace AT amp G Guard Tone AT amp L Line Type AT amp X Clock AT AP Adaptive Rate AT AY Auto Type AT KC Answer Originate Mode AT FC Fast Call AT XLS Low Speed AT MD PSTN Signaling AT MM Modulation Mode AT MN Minimum Rate AT KMX Maximum Rate AT RT Retrain Modulation Options 2 7 Restoral Options Restoral Options MODULA TION OPT S bd Figure 2 4 illustrates the RESTORAL OPT S menu RESTORAL OPT S menu options control initiation timing and connection parameters that your modem uses to communicate over a dial line when leased line problems occur The 326X Series Modem can be used in V 22 bis at 2400 or 1200 bps V 32 32 Uncoded at 9600 or 4800 bps V 32 bis at 14 000 12 000 9600 7200 bps or C Fast at 24 000 21 600 19 200 16 800 14 400 12 000 or 9600 bps modulation modes as both a leased line modem with dial restoral capability or a dial modem configured for restoral All RESTORAL OPT S menu options listed below have AT command equivalents which are described in Chapter 1 AT Comm
34. PE command description you must set protection To set protection 1 Display Set Protection 2 Press The modem responds with Password Protected The modem is now locked and it is necessary to enter your password to access locked functions If you try to access locked functions the modem responds with Password Locked PN PT AT PN Unlock Password Protection To unlock a password protected modem and gain access to all modem functions use FP m resa i e ee the ATXKPNxxxx command xxxx represents the password which must be entered eta with the command You can also use the front panel option to gain access to all modem functions Do the following 1 Display Enter Password 2 Press The modem displays Enter PW 0000 3 The cursor on the leftmost zero is flashing indicating it is selected Using wr to select digits 0 9 and J to move the cursor to the right enter your new password If you should incorrectly enter the password press W and the modem displays Entry Cancelled 4 Once you have entered the password correctly press The modem displays Passwd Unlocked 5 If you should enter an incorrect password the modem responds with Invalid Password Your modem relocks the password protected features after five minutes of no activity To lock the modem before the default time expires see the ATK PF command AT PT Dial Type See the ATP command description described earlier AT Co
35. SET RMT LL ADDR menu and SRCH RMT LL ADDR menu sections in Chapter 2 of this guide first To initiate a remote configuration session with a leased line modem 1 Establish a leased line connection with the remote modem at 7200 bps or greater 2 Press W to move to the Home position on the front panel menu tree 3 Press yw until the RMT CONFIG OPT S menu appears 4 Press to display Init Rmt Cnfg 5 Press The modem displays Rmt Address 000 The leftmost 0 is blinking Enter the remote modem s address Using v select the first digit of the leased line modem s address Press J to move the cursor to the next digit Use 4 again to select the second digit Once you have finished entering all three digits of the remote modem s address press The modem displays Initiating RC If successful the modem displays RC Established If unsuccessful the modem displays RC Failed Or RC Denied Failure to establish a remote configuration session can be caused by the following The remote modem s Rmt Acc option is set to Disabled AT RAO The remote modem is running a test AT Commands 1 85 x RC Terminating a Remote Configuration Session When you terminate a remote configuration session changes made to the remote modem s configuration are automatically saved The AT RC Command To use the AT RC command to terminate a session 1 Enter ATX RCO CR 2 Your terminal displays RC COMPLETE OK
36. SUB 1A 3F 27 ESC 1B 27 28 FS 1C 1C 29 GS 1D 1D 30 RS 1E 1E 31 US 1F 1F ASCII EBCDIC Hexadecimal Equivalents A 1 Table A 1 ASCII to EBCDIC Translation Continued ASCII Decimal Symbol ASCII Hex EBCDIC Hex 32 SP 20 40 33 21 5A 34 p 22 7F 35 23 7B 36 24 5B 37 25 6C 38 amp 26 50 39 apostrophe 27 7D 40 28 4D 41 29 5D 42 2A 5C 43 2B 4E 44 comma 2C 6B 45 minus 2D 60 46 period 2E 4B 47 2F 61 48 0 30 F0 49 1 31 Fl 50 2 32 F2 51 3 33 F3 52 4 34 F4 53 5 35 F5 54 6 36 F6 55 7 37 F7 56 8 38 F8 57 9 39 F9 58 3A 7A 59 3B 5E 60 3C 4C 61 3D 7E 62 gt 3E 6E 63 2 3F 6F 64 40 7C 65 A 41 Cl 66 B 42 C2 67 C 43 C3 68 D 44 C4 69 E 45 C5 70 F 46 C6 A 2 ASCII EBCDIC Hexadecimal Equivalents Table A 1 ASCII to EBCDIC Translation Continued ASCII Decimal Symbol ASCII Hex EBCDIC Hex 71 G 47 C7 72 H 48 C8 73 I 49 C9 74 J 4A D1 75 K 4B D2 76 L 4C D3 77 M 4D D4 78 N 4E D5 79 O 4F D6 80 P 50 D7 81 Q 51 D8 82 R 52 D9 83 S 53 E2 84 T 54 E3 85 U 55 E4 86 V 56 E5 87 W 57 E6 88 X 58 E7 89 Y 59 E8 90 Z SA E9 91 5B AD 92 5C EO 93 5D 94 5E SF 95 _ underscore SF 6D 96 accent 60 79 97 a 61 81 98 b 62 82 99 c 63 83 100 d 64 84 101 e 65 85 102 f 66 86 103 g 67 87 104 h 68 88 105 i 69 89 106 j 6A 91 107 k 6B 92 108 l 6C 93 109 m 6D 94 ASCII EBCDIC Hexadecimal Equivalents A 3 Table A 1 ASCII to EBCDIC Translation Continued
37. Setting Description Default 0 The modem identifies itself with a generic MNP all identification number Use this setting unless you are certain that the remote modem s 1s a Motorola modem Codex 1 The modem identifies itself with a special MNP identification number assigned to modems only This allows one modem to recognize another modem during an MNP link negotiation AT SM Data Transfer Mode v Cp 1 94 AT Commands The AT SM Mode command sets the data transfer mode for asynchronous applications or for synchronous applications with the 326XFAST Synchronous Data Compression SDC product The setting you choose governs the modem s use of error correction NOTE To enable 326XFAST SDC one of the reliable data transfer modes Mode Reliable Auto Reliable or Speed Dependent Auto Reliable must be selected These modes are described in this section Caution A characteristic of error correcting modems is that they negotiate error correction type and level after the physical connection with a remote modem has been established Upon initial connection to a non error correcting modem the originating error correcting modem attempts to negotiate an error corrected link by sending a link request This request is seen by the non error correcting answer modem and treated as user data The link request characters may appear as a short burst of jumbled data at the answer site Also any data sent by a non error correcting modem duri
38. The modem adjusts its DTE port speed to match the speed of the negotiated data link On 1 DTE to modem speed remains constant all regardless of the negotiated data link speed The AT SI DTE Inactivity exception is Direct data mode In this case DTE to modem speed must always match the modem to modem speed wr TERMINAL OPT S b PI The AT amp SI Inactivity command allows you to select the length of the time the modem waits before disconnecting when no data is being transferred NOTE This option does not apply when the modem is set for the synchronous data transfer mode Option Setting Off all 3min 10min 20min 30min S30 AT Command Setting Description ATSI The Off option disables the inactivity timer AT SII The modem will disconnect if 3 minutes elapses without data transfer to or from the DTE AT KSI2 The modem will disconnect if 10 minutes elapses without data transfer to or from the DTE AT KSI3 The modem will disconnect if 20 minutes elapses without data transfer to or from the DTE AT KSI4 The modem will disconnect if 30 minutes elapses without data transfer to or from the DTE AT KSI5 The inactivity timeout is controlled by the value set in S Register 30 AT Commands 1 93 SL SM AT SL Error Correction ID v C The AT SL EC ID command allows you to set the identification number that modems exchange when they attempt to establish an MNP link AT Command Option Setting
39. bis options REST ORALOPT S ww I 1 I ACU SelectsA T AT F orm Async V25F orm Async NoA CU F orm Async Def aul Dial Off Ans wer Man_ ual Async Echo On v v v v v v v 25b SyncData Asynync Sync Ring 1 Off ww vr v LPD A2 DTR Dial Bitsync j Ring 2 v v v None Man Dial XCharsync j Ring 4 Ring 48 Using S0 Char Length 8 V25 Char ASClI Sync Idle Mar k V25 Resp V25his Parity V 25 ATMsg Bef ore CD RsltCode Enab le v v v x v v v EBCDIC Char V25r ate Even After CD Disab le v NALOnly Odd Orig bd None RsltF orm Numer ic Rel Msg 0ff LPD A2 Addr FF LPD A2 ID 326X LPD A2 Det Enab CallProg ress 0 v v w55 sab Verbose Shor t v Long y TERMINAL OPT S KEY Option Included I _ Countr y Specifi c 7 in Option Sets Option Figure 2 6 ACU OPT S Menu ACU Options 2 15 ACU Options Some ACU OPT S menu options listed below have AT command equivalents which are described in Chapter 1 AT Commands of this guide The remaining ACU OPT S options which you can select only from the front panel are described immediately following this list Options with AT Command Equivalents ATE Asynchronous Echo ATQ Result Code Display ATV Result Code Format ATX Call Progress AT amp M AT Form AT AA Manual Auto Answering AT KDA Default Dial Address AT K MS AT Messages AT kRP Parity AT XC Error Correction Reliable Messages
40. displayed If the modem s transmitter and receiver were unable to synchronize the pattern the modem displays No Sync Achieved To start this test using an AT command enter the following command at an attached terminal AT amp T8 CR To stop this test enter the following command AT amp TO CR The screen displays the bit errors followed by the OK message indicating that the test has been terminated If the modem s transmitter and receiver were unable to synchronize the pattern the screen displays No Sync Achieved NOTE This test also can be terminated automatically by entering a nonzero value in the Test Timer S Register 18 The function of S Register 18 is valid only when loopback tests are issued using the AT amp T command S Register 18 cannot be used to automatically terminate loopback tests if the test is initiated from the front panel When the test terminates the screen displays lt of errors OK This test will run indefinitely if not programmed to terminate itself through this S Register 18 Testing Your Modem 4 9 Remote Digital Loopback Test AT amp T6 4 10 Testing Your Modem Using local DTE data for testing the remote digital loopback RDL test examines the transmit and receive circuitry of the local and remote modems and the telephone line Remote DTE data is ignored during the RDL test IMPORTANT f operating in 326XFAST SDC mode refer to the 326XFAST Synchronous Data Compression Tes
41. enabled to reduce the amount of data sent to the remote DTE when a flow off condition is received at the local DTE NOTE This option is available only when Mode Normal AT SM AT Command Option Setting Setting Description Regular 0 Normal capacity buffers are used all Reduced 1 Reduced sized buffers are used allowing less data to be accumulated in the modem AT Commands 1 77 NC xND AT NC Network Compensation CX TELCO OPT S pees Network Comp The Network Compensation option allows you to enhance the performance reliability of the 326XFAST 326XFAST SDC Modem when operating with certain types of network equipment NOTES 1 This option is available only when the C Fast Auto or C Fast Only modulation modes are selected 2 This option applies to Releases 5 2 and greater of the 326XFAST 326XFAST SDC Modems only AT Command Option Setting Setting Description Off 0 Off should be selected when making most normal default connections within a continent Lvli 1 Select Lvl1 if the modem is experiencing performance problems when connected to a line terminating equipment via a short loop having low loop loss with below normal receive signal levels for example when operating behind a low grade PBX NOTE This selection limits the maximum possible DCE data rate to 21 600 bps Lv12 2 Lvl2 is recommended when performance problems are encountered making intercontinental calls NOTE This selection limits th
42. for modem 1 74 modem to modem 1 74 forbidden numbers 3 8 stored 3 10 FP SECURITY menu 2 26 figure 2 26 FP Security menu options with AT command equivalents 2 26 frame formats asynchronous 3 14 synchronous bit oriented 3 15 synchronous character oriented 3 16 V 25 bis 3 13 framing rules for LPDA2 3 27 frequency offset 1 41 frequency shift key modulation See FSK modulation front panel LEDs RI OH 2 9 security options 2 26 front panel options Accept RDL 1 31 ACU 2 15 ACU Select 2 16 Adaptive Rate 1 50 Answer 1 49 Answer in Restoral 1 51 Async Echo 1 11 AT Form 1 26 AT Msg 1 76 Auto Redial 1 61 Auto Type 1 52 Blind Dial 1 52 Break 1 53 Buffer Delay 1 56 Call Progress 1 15 Call Timeout 1 98 Callback 1 100 Change Password 1 82 Char Length 2 18 Clock 1 47 CTS control 1 54 Data Compression 2 14 DCD 1 19 Default Dial 1 55 Index 6 F Continued front panel options Continued defaults 1 8 Dial 1 13 1 14 Dial Restricted 1 101 Dial Stored Number 1 61 Dial to Leased 1 69 Dial Wait 1 57 Display Modem ID 1 23 DL TX 2 24 DTE Ct 140 1 69 DTE Ct 141 1 68 DTE Inactivity 1 93 DTE Pin 25 1 72 DTR 1 20 DTR Delay 1 61 EC 1 62 EC ID 1 94 EC DC OPT S 2 14 Enter Group PW 1 101 Enter Password 1 82 Enter Then Dial 1 10 Error Correction 2 14 Ext Select 1 79 Fast Call 1 63 Flow Control 1 64 Group PW 2 29 Init Rmt Cnfg 1 83 LAL Busy Out 1 70 Leased to Dial 1 59 Line 1 25 LL TX 2 24 Longspace 1 18 Low Speed 1 71 Ma
43. if not using one of the predefined option sets once you have selected the AT ACU make sure you select one of the synchronous data formats Sync Data DTR Dial or Man Dial described below Also make sure you select one of the reliable data transfer modes Reliable Auto Reliable or Speed Auto Reliable using the Mode AT kSM option Option AT Command Setting Setting Description Async 0 The modem is compatible with asynchronous DTEs and all uses the AT command set and auto call functions Sync Data 1 This setting is intended for terminals capable of communicating either synchronously or asynchronously over the same serial port When disconnected from the dial line communication between the modem and DTE is asynchronous The AT command set and auto call functions are used to establish calls Once in data mode the modem exchanges data synchronously with the remote modem An on to off DTR transition causes the modem to disconnect from the dial line This option is designed for use with the AT DT DTR Delay option in the TERMINAL OPT S menu command The AT k DT command controls the length of time that your modem holds DTR high the amount of time you have to switch from an asynchronous to a synchronous terminal If DTR transitions from on to off while you are switching to a synchronous terminal your modem disconnects from the dial line DTR Dial 2 When an off to on DTR transition is detected the modem automatically dials the
44. important testing considerations NOTES 1 For maximum reliability run the RDL LDL and RDL Pat tests at a data rate of 19 2 kbps or lower 2 This test is not valid in the Bell 103 or V 21 modulation modes If you attempt to run this test in either of these modulation modes the modem responds with Test Denied Occasionally a 326X Series Modem is used with a remote modem that does not have the digital loopback feature In this case to run a local digital loopback test from the remote modem you must put the local modem into a local digital loopback test see Figure 4 6 During this test the local modem loops incoming data back to the remote modem as if the remote modem had initiated a remote digital loopback test see Figure 4 3 NOTE This test applies only when the Line option is set to Dial Local Modem Remote Modem Figure 4 6 Local Digital Loopback Test Before starting an LDL test make sure your modem is connected to another modem otherwise the modem displays Test Denied when you start the test To run an LDL test 1 Establish a connection with the remote modem 2 Use the front panel keys to move through the TEST OPT S menu until the modem displays TEST End Test 3 Press yw until the modem displays TEST LDL 4 Press The modem displays TEST LDL 5 Press W twice to reach the home display The modem displays TEST data rate T D 6 To end the test use the front panel keys t
45. in the memory address selected memory 2 3 addresses 1 9 when one of the following conditions occurs The DTR option in the modem is set to 108 1 or Tail and the DTE turns the DTR signal from off to on The DTR option in the modem is set to 108 2 Esc Discon Reset or High the DTR signal is on and either the front panel Talk Data key at the Home position is pressed or control of the dial is switched to the modem with an exclusion key telephone ACU Select AT AT Form DTR Dial and the DTR signal transitions from off to on l Default with the 326X FAST SDC Modem AT Commands 1 55 DB AT DB Buffer Delay v E p 1 56 AT Commands The AT k DB Delay command allows you to configure the modem for a disconnect delay to provide time for clearing buffers S Register 38 determines how long the modem processes buffered data when a disconnect is initiated The range for S Register 38 is between 0 and 255 The disconnect buffer delay feature applies when data is transmitted from DTE to DCE or from DCE to DTE When this feature is enabled depending on which disconnect type you have selected the modem delays to clear its TX or RX buffer The TX buffer delay applies to the following disconnect types DTR ATH LPDA2 The following commands apply to the termination of connections restored on the dial line DTR ATH and 116 The RX buffer delay applies to the following disconnect types error correct
46. jack selection that is compatible with your equipment The Federal Communications Commission FCC is a telecommunications and standards organization that specifies a series of registered jacks for use with a dial line network sometimes referred to as PSTN These jacks are designated as RJxxx type jacks where RJ means Registered Jack and xxx specifies the series of the jack For example RJ11 indicates that the jack is a registered jack from series 11 Sometimes the jack designation is followed by a letter RJ11C that indicates the jack housing style Jacks specified under FCC Part 68 fit into one of the following categories Permissive voice or Programmable data AT Command Option Setting Setting Description RJLIC 0 This 6 pin modular jack type is the most common permissive data mode voice jack arrangement found in the home or office and operates on a single line bridged tip and ring voice or low speed data application service RJ45S 2 This 8 pin modular jack type is the most common programmable data mode data jack arrangement and permits the use of an exclusion key telephone This jack also operates on a single line bridged tip and ring voice or low speed data application service RJ16CS 3 This 6 pin modular jack type is a special permissive data mode jack arrangement that allows use of an exclusion key telephone RJAMB 4 This 8 pin modular programmable data mode jack arrangement supports Make Busy operation Using this ja
47. message INV Also if your PTT does not require forbidden numbers and you issue the RLF command the modem responds with the invalid message INV 3 8 Automatic Calling Interfaces Table 3 5 V 25 bis Commands Continued Command Description RLD Request List of Delayed numbers This command instructs the modem to send a list of delayed numbers to the DTE The PTT may require the modem to place a number on a delayed call list if a call to that number fails The modem cannot dial a number that is on the delayed call list until the prescribed time the xxx designation expires or until power to the modem is turned off and then on again A typical list of delayed numbers might look like this RLD LSD 8005551212 45 In this case a call or calls to the number described failed Consequently the modem placed the number on the delayed list The modem cannot call this number for 45 minutes or until the modem power is turned off and then on again If the modem currently has no numbers on the delayed list it responds with RLD LSD If the RLD command is issued when password protection is enabled and the modem is locked the modem responds with the invalid message INV Also if your PTT does not require delayed numbers and you issue the RLD command the modem responds with the invalid message INV RLN Request Listed Numbers This command instructs the modem to list the numbers stored in the modem s nonvolatile memory
48. of a local analog loopback test AT LC Line Compensation v TELCO OPT S D ies 1 68 AT Commands The AT kLC Line Compensation command enables the modem to compensate for the effects of low loss in the End Office to End Office connections This may occur when you are making a local call and using round trip delays less than 10 ms Line compensation corrects the effects of low loss in the inter CO connections on the received signal on short connections NOTE The AT LC command applies only when the modem is set for V 32 V 32 bis operating mode Option AT Command Setting Setting Description Off 0 Disables the Line Compensation option all On 1 Enables the Line Compensation option x LD cLE AT LD DTE Circuit 140 v TERMINAL OPT S p ees DTE Ct 140 The AT amp LD DTE Ct 140 command controls whether or not the local DTE can put the modem into a remote digital loopback by sending a signal on V 24 Circuit 140 Pin 21 to the modem The DTE must support V 24 Circuit 140 to use this option NOTE A remote digital loopback test initiated via DTE Circuit 140 will be overridden by front panel or AT test commands Option AT Command Setting Setting Description Off 0 The modem does not respond to a signal on V 24 all Circuit 140 Pin 21 On 1 An off to on transition on V 24 Circuit 140 Pin 21 sends the modem into a remote digital loopback test An on to off transition on V 24 Circuit 140 Pin 21 takes the modem
49. on the remote modem and record the number Serial Number Figure 2 16 Locating Modem Serial Number 2 44 Remote Configuration Options Performing Numeric Entry Performing Numeric Entry Listed below are front panel option settings that require you to enter information using the front panel or ACUs The following procedure describes how to use the front panel keys to make a numeric entry Front Panel Option Enter Phone n Enter Then Dial S Reg xxx nnn LPDA 2 Addr nnn Enter PW nnnn Old PW nnnn New PW nnnn Verify PW nnnn Enter Group PW NC Address nnn New Address nnn Rmt Ser nnnnnnn Description Stores phone number to phone book memory in location n Allows you to dial from the front panel Allows you to set S Register xxx to nnn Allows you to set the LPDA2 address Allows you to unlock a modem s password protection Allows you to enter old password Allows you to configure new password Allows you to verify new password Allows you to verify group password Allows you to set network control address Allows you to set remote modem s leased line address Allows you to enter remote modem s serial number The key strokes required to set the numeric entry for the options listed above are as follows 1 Step across the desired front panel menu by pressing p until the option you want to change is displayed 2 Press You are now ready to key in the numeric entry 3 Press wp until the desired
50. out of a remote digital loopback test AT LE Dial to Leased Option Automatic Disconnect ww psi The AT KLE D to L command allows the modem to automatically disconnect from the dial line and return to the leased line after a specified period Option AT Command Setting Setting Description Manual 0 Pressing the Talk Data key at the Home 1 2 5 position returns the modem to the leased line 15 min 1 The modem returns to the leased line after 15 minutes 30 min 2 The modem returns to the leased line after 30 minutes hour 3 The modem returns to the leased line after 1 4 hour 2 hours 4 The modem returns to the leased line after 2 hours 4 hours 5 The modem returns to the leased line after 4 hours If you set this option to Manual an alternate method of disconnection must be used For all other settings the modem automatically disconnects and returns to the leased line after the selected time expires Set both modems to the same setting for the D to L option NOTE If Hold Dialine is set to anything but Off the modem holds the dial line for the specified time period AT Commands 1 69 LL KLN AT LL Local Analog Loopback Test Busy Out v TEST OPT S P LAL Busy Out The AT kLL LAL Busy Out command determines whether the modem appears busy to incoming calls during a local analog loopback test NOTE Set the AT amp J TELCO OPT S Telco option to RJ4MB before enabling this option Option AT
51. press the modem responds with Reinit All Mem 3 Press again The modem displays 326x Initial 4 You have now reset the modem to its factory default option settings and deleted all entries from the electronic telephone book Password protection is disabled and the password is set to 0000 5 If you plan to use the password protection feature again open Switch 4 on the modem s rear panel set it to the up position Front Panel Security Options 2 27 Access Security Options Access Security Options Figure 2 11 illustrates the ACCESS SECURITY menu Access Security is used with answer 326X Series Modems Any calling station with DTMF Dual Tone Multi Frequency dialing can use the modem s Access Security feature ACCESS SECURITY menu options allow your modem to screen incoming calls using a password function FP SECURITY wu ra p gt ATN po Axx jp AT AZAR b ATZ gt p ax jb a s gt PW Verify Dis Off D Rmt Num Rgrd 0ff Enter Group PW Group PW Disab le Tone None Sim Ring Disab le v j v v v Inter n Tec 3 Enab le Prompt Only Enab le Inter nn Y ack Only Mng r inter n 9 7 evonpiic k Remote Manager RmtInd RMT CONFIG OPT S Dial Rstrct Off un Yi Figure 2 11 ACCESS SECURITY Menu The ACCESS SECURITY OPT S menu options listed below have AT command equivalents which are described in Chapte
52. s category After setting the answer modem as indicated in steps 1 3 above next you will dial the answer modem and provide the access security password When dialing the answer modem you enter a dial string telling the modem how to complete the call A typical non callback dial string appears as follows 5552345 1111 k0 555 2345 is the answer modem s telephone number The dial modifier ensures that the answer modem has picked up before the password is transmitted The password 1111 is transmitted followed by the 0 code which tells the answer modem that the entry is complete To dial the answer modem proceed as follows 1 Enter the answer modem s telephone number in the calling modem 2 Once your modem has dialed the answer modem s number you must instruct it to wait for the answer modem to answer the call To do this use the dial modifier or if your modem does not support the dial modifier use the pause K dial modifier The dial modifier instructs your modem to wait for five seconds of silence after hearing the ringback tone This ensures that the answer modem has picked up the call 3 Enter the access security password 4 Include the code 0 in the string telling the answer modem that password entry is complete NOTE The password will not be accepted and the call will be disconnected if the O code is not at the end of the dial string NOTE If the answer modem s Callb
53. setting of the modem s RTS option has been followed In order for CTS to follow the RTS signal from the DTE set the RTS option to Normal Option Setting High Normal 2 3 4 ACU On AsynSync 1 RTS AT Command Setting AT CTO AT amp R1 AT KCTI AT KCT2 AT CT3 AT amp RO AT CT4 Description CTS remains on at all times Use this setting if you plan to use RTS CTS or DTR CTS flow control The modem controls CTS as required in normal handshaking For V 25 bis ACU operation CTS follows DTR in command state CTS is off during training retraining and follows RTS in data mode For AT ACU operation CTS follows RTS in command state CTS is off in training retraining and follows RTS in data mode If an ACU is not selected CTS is low CTS is on in ACU mode goes off during training retraining and follows RTS in data mode CTS is on in asynchronous mode CTS is off in synchronous ACU mode If the data transfer mode is synchronous CTS is off during training retraining and follows RTS in data mode When CTS follows RTS in data mode the setting of the RTS CTS Delay option applies if Mode Direct CTS follows RTS Use this selection if your application requires CTS to immediately follow RTS When CTS RTS the RTS CTS Delay AT DL option is not available If one of these flow control methods is used Flow RTS CTS or Flow DTR CTS then CTS does not follow RTS in a flow off condition AT amp S AT MR DSR Co
54. setting without having the RJAMB service installed IMPORTANT Before enabling the Busy Out feature set the following AT LT DTE Pin 25 option to Busy AT KLTO AT amp J TELCO OPT S Telco option command to RJ4MB and The 6 position DIP switch 2 on the modem s rear panel to the Off up position To busy out your modem do the following 1 Use the front panel keys to move through the TEST OPT S menu until the modem displays TEST End Test 2 Press wp until the modem displays TEST Busy Out 3 Press The modem displays TEST Busy Out 4 Press W twice to get to the home display Busyout T D is shown in the status display The modem now appears busy to all incoming calls 5 Terminate the Busy Out condition by using the front panel keys to move through the TEST OPT S menu until the modem displays TEST End Test 6 Press The modem displays Test Completed To busy out your modem using an AT command enter the following command from an attached terminal ATH1 lt CR gt To terminate the Busy Out condition enter ATH lt CR gt After you end the Busy Out condition the screen displays OK Retrain ATO1 When two modems establish a connection they train with each other Training allows the modems at both ends of a connection to adjust their receivers for current telephone line conditions and agree on what data rate to use Occasionally modems need to retrain when signal quality degrades You may need to ma
55. settings If you attempt to change an option setting the modem responds with Net Man Attached AT commands can still be issued to the modem from an attached control terminal but testing and access security AT commands have no effect If you issue a testing or access security AT command the modem responds with Network Management Inhibited The only front panel option whose setting can be changed while the network manager is attached is the Override Mode option If you change the setting from Off to On you regain control of your modem front panel NOTE If the network manager has set your modem s front panel password protection you cannot change the setting of the Override Mode option You can however unlock password protection using the Enter Password function in the FP SECURITY menu and then override network management control The network manager cannot attach your modem Network Control Address The NC Address option allows you to set your modem s network control address This is the same address that 326X Series Modems use with the SET RMT LL ADDR and SRCH RMT LL ADDR functions The range of valid addresses is 0 to 254 To set your network control address see Performing Numeric Entry at the end of this chapter for details Note that if you enter an invalid address the modem displays Invalid NC Addr Network Control Options 2 35 Network Control Options Network Control Port Rate Set the NC Port Rat
56. the INV INValid response PRNa n PRogram Number This command instructs the modem to store a phone number in a specific address in the modem s nonvolatile memory The modem has nine 1 9 phone number addresses in nonvolatile memory To store a phone number in address 2 issue the following command PRN2 1 555 1234 The telephone number can contain up to 50 characters including hyphens or spaces Use the dial modifiers described in the previous section to accommodate special dialing requirements To delete a number from a specific memory address enter the PRN command followed by the address of the number you want to delete For example to delete the number in memory address 1 enter PRN1 RLF Request List of Forbidden numbers This command instructs the modem to send a list of forbidden numbers to the DTE The PTT may require the modem to place a number on a forbidden list if a call to that number fails The modem cannot dial a number that is on the forbidden list until the power to the modem is turned off and then on again A typical list of forbidden numbers might look like this LSF 8005551212 In this case a call or calls to the number described failed Consequently the modem placed the number on the forbidden list If the modem currently has no numbers on the forbidden list it responds with LSF If the RLF command is issued when password protection is enabled and the modem is locked the modem responds with the invalid
57. the address the option set where the new customized option set is stored The front panel displays Saving Options 4 After a few seconds your modifications are stored in the modem s nonvolatile memory and the modem front panel displays Save Completed The new customized option set you have created replaces in nonvolatile memory the option set previously stored in that option set address The Front Panel To create a customized option set 1 Using the Select Options function select the option set that most closely suits your application see Chapter 4 Configuring Your Modem of the 326X Series Modem User s Guide for an in depth discussion of option sets 2 Display the individual option s you want to modify using yw and p For example if you want to change the Max Rate setting from 2400 to 7200 display Max Rate 7200 3 Press The display flashes three times and the colon changes to an equal sign The new option is now temporarily saved and the modem displays Max Rate 7200 4 Step across the Status Option Sets Dialing menu by pressing until you see Save Changes n 5 Use the wr key to display the option set number where you want the changes saved and then press The modem displays Saving Options 6 After a few seconds the modifications are stored in the modem s nonvolatile memory and the modem displays Save Completed 1 46 AT Commands amp X amp Y AT amp X Clock we The AT amp X C
58. the number specified if the Auto Redial option is enabled the modem redials until the call is successful or the redials are exhausted If both the Link Phone and Auto Redial options are enabled the modem links first and then redials If the modem is configured for 108 ACU or 116 ACU it disconnects from the dial line and remains in the disconnected state until another ACU command is received The Retrain option AT K RT under the MODULATION OPT S menu which controls the modem s auto retrain function is set to High BER in Option Set 4 You must enable the Retrain option in the local and remote modems to implement automatic restoral Restore FP Auto NOTE Motorola recommends that you enable the Retrain option in most applications Setting the Retrain option in both modems to Low BER instructs the modem to retrain when it detects a low bit error rate approximately 1 in 10 000 When Retrain Low BER the originating modem initiates restoral more quickly because the criteria for retraining is more sensitive For restoral applications set the Longspace option ATY under the MODULATION OPT S menu to Off 14 When changing any of the default settings save the changes in nonvolatile memory Refer to AT amp W Save Changes Creating New Option Sets in Chapter 1 AT Commands for information on storing customized options in nonvolatile memory Restoral Options Interpreting the DTR Option Setting The following section
59. this section ACU Options V 25 bis Data Format The V25 Form option determines the format of data when the ACU Select option is set to V25b NOTE To enable 326XFAST SDC after selecting V 25bis ACU make sure you choose one of the synchronous data formats AsynSync or Bitsync described below Also make sure to select one of the reliable data transfer modes Reliable Auto Reliable or Speed Auto Reliable using the Mode AT E SM option Option Setting Description Async Modem is compatible with asynchronous DTEs AsynSync Modem dials calls asynchronously but data is passed synchronously Bitsync The DTE uses the bit synchronous HDLC like protocol outlined in the all CCITT V 25 bis specification Charsync The DTE uses the character synchronous protocol outlined in the CCITT V 25 bis specification NOTE Charsync is not available for SDC operation If Charsync is selected a direct synchronous connection will be made regardless of the setting of the Mode AT SM option NOTE For all V25 Form options settings the modem uses the V 25 bis ACU if you also set the DTR option to 108 2 Discon Reset Esc or High NoACU Data Format The NoACU Form option determines the format of data when the ACU Select option is set to Off NOTE To enable 326X FAST SDC after selecting ACU Select None make sure you choose the synchronous data format Sync described below Also make sure to select one of the reliable data transfer modes R
60. through the Adaptive Rate feature are not counted If the number of retrains over a period of time exceeds the threshold set by the L to D Leased to Dial option or if the modem does not receive answers to its training sequences the originating modem initiates restoral by dialing the number stored in its telephone directory based on the setting of the Default Dial option Once the modems are using the dial line the originating modem continues to count retrains on the dial line If the number of retrains over a period of time exceeds the threshold set by the L to D Leased to Dial option the originating modem disconnects from the dial line and returns to the leased line AT Command Option Setting Setting FP 108 ACU FP 116 ACU 5 6 RE Description The 108 ACU restoral setting allows you to use off to on transitions of this signal from the DTE to activate the ACU This allows the modem to accept dial commands In the FP 108 ACU restoral setting the answer or originating modem can enable the ACU when the connected DTE turns Circuit 116 from off to on Once a call is successful an on to off transition of DTR disconnects the affected modem from the dial line and returns it to the leased line If a call is terminated by any means other than DTR the modem remains in a disconnected state waiting for ACU commands An on to off transition is required to return to the leased line NOTE The Ext Select option overr
61. through the LAL Busy Out option If LAL Busy Out is set to Off and you initiate an LAL test other modems calling your modem receive ringback without an answer If LAL Busy Out is set to On and you initiate an LAL test your modem appears to be busy to other calling modems NOTE The LAL Busy Out option should not be confused with the Busy Out Setting of the TEST option in the TEST OPT S menu The modem does not allow you to first enable the Busy Out option and then perform an LAL test Tx Tx m Rx e Rx Local Modem Remote Modem Figure 4 1 Local Analog Loopback Test Testing Your Modem 4 5 4 6 Testing Your Modem If your terminal supports Circuit 141 you can use Circuit 141 signaling to initiate this test To do this enable the DTE Ct 141 option AT kLA in your modem s TERMINAL OPT S menu The DTE can then initiate an LAL test by turning Circuit 141 from off to on From the front panel to start a local analog loopback test do the following 1 Use the front panel key to move through the TEST OPT S menu until the modem displays TEST End Test 2 Press yy until the modem displays TEST LAL 3 Press The modem displays TEST LAL You will hear the modem training if the speaker is enabled 4 Press W twice to reach the home display The modem briefly displays LAL Training T D and then displays LAL data rate T D For example you may see LAL 9600 T D NOTE If t
62. to D Option Settings C Fast V 32 bis V 32 All Other Modulation Modes Modulation Modes AT Option Command of Time in of Time in Setting Setting Setting Retrains Minutes Retrains Minutes Low Fast 0 High 3 5 6 5 all Low Slow Medium 6 10 12 10 High Fast 2 Medium 5 5 10 5 High Slow 3 Low 10 10 20 10 AT Commands 1 59 x DL kDP AT DL RTS CTS Delay w The AT kDL RTS CTS Delay command sets the interval for the delay time Terminal orrs p e e o between RTS and CTS These settings only apply when operating in the asynchronous Direct or synchronous data modes Option AT Command Setting Setting Description 0 0 There is no RTS CTS delay all 15 1 There is a 15 ms minimum delay before the modem sends the CTS signal to the DTE after receiving RTS from the DTE 60 2 There is a 60 ms minimum delay before the modem sends the CTS signal to the DTE after receiving RTS from the DTE 90 3 There is a 90 ms minimum delay before the modem sends the CTS signal to the DTE after receiving RTS from the DTE S26 4 RTS CTS delay is determined by the value of AT DP Pause Delay S Register 26 The AT KDP Pause Delay command forces the modem to pause when the modifiers dutNG OPTS are encountered in a dial string or on the command line The modifiers are as Pause Delay follows Option AT Command e lt ek K Setting Setting 3 0 6 1 9 p 12 3 S8 4 Description Pause delay is 3 seconds Pause del
63. to dial the remainder of the dial string If the line is busy the modem hangs up and sends a BUSY message to the DTE If the modem does not detect delay silence or a busy signal the modem hangs up and the screen displays NO ANSWER OxAB This modifier instructs the modem to return to the command state after dialing without breaking the connection The modem can dial but cannot train and no call progress messages are received This modifier is used when calling an electronic service that permits the user to transmit numbers using tones once a connection has been established For LPDA2 protocol the semicolon is applicable only when it is immediately followed by the h modifier h OxAC This modifier causes the modem to disconnect from the dial line This must be the last modifier in the dial string and must also be preceded by a semicolon If the H or h modifier is not preceded by a semicolon it is ignored by the modem The H or h modifier can be entered through the front panel AT ACU V 25 bis ACU LPDA2 or network manager A OxEA These modifiers are special tones used for some DTMF Dual Tone Multifrequency B OxEB telephone systems C OxEC D OxED S OxA2 Reserved t OxA3 Reserved V OxA5 Reserved w OxA6 Reserved X OxA7 Reserved Automatic Calling Interfaces 3 29 Dial Command Sense Bytes If the dial command is successful and the modems connect a response with a sense byte of 0x00 command successful is displayed
64. to the DTE The sense byte message is displayed when the modems are ready to pass data This response follows the DCD AT amp C option selection which specifies if Connect messages are sent to the DTE before DCD is raised or after DCD is raised If the dial command is unsuccessful a response is sent to the DTE with the sense byte specifying the reason The sense byte can contain the following error codes in addition to the error codes Sense Byte Error Codes Ox0C 0x08 0x10 0x12 0x13 0x14 0x18 OxlA Ox1B Ox1C OxID Ox1E 3 30 Automatic Calling Interfaces Definition The modem is busy and cannot execute a valid dial command Usually use of this response means that something local to the modem is preventing execution of the command This response indicates that dialing is not allowed due to the DTR conditions This sense byte is normally sent when the modem has received an invalid command Reserved This sense byte is used if the call timeout timer specified in the Call Timeout AT K TT option expires Reserved This sense byte shows a busy signal was detected When the modem detects a busy signal it immediately returns this response and hangs up If the defeat busy modifier was included in the dial command string the modem does not detect a busy signal Reserved This sense byte is sent if the modem at the other end of the connection has not answered before the call timeout timer expire
65. trrbre be De L6 Poe Lb Dil E obois AT KPT Dial Type AT KPW Change Password AT KRA Remote Access AT RC Initiate Terminate or Abort Remote Configuration Session Initiating a Remote Configuration Session with a Dial Modem Initiating a Remote Configuration Session with a Leased Line Modem Terminating a Remote Config uration Session sacraro Aborting a Remote Configuration Session eese ATRE Initiate lerminate Bestor l 12 e rrt pte FEE PIE DESEE igloureiaus ATOERP Party isset nas AT KRS RTS Control AT KRT Auto Retrain AT kSC Speed Conversion AT SI DTE Inactivity AT KSL Error Correction ID AT KSM Data Transfer Mode AIKSK RIS DCD Remote Signaling 2 rrr rtt taunan AT KST AT amp V Modem Status culte get T AT KTD Throughput Delay Minimization eene AT KTL Tone Length AT KTT Call Timeout AT XC Error Correction Reliable Messages eere AT amp ZC Callback Feature AT KZD Dial Restricted AT amp Z I Enter Access Security Group Password eese AT ZP Select Tones with Access Security ee coser etre erem bru enean AIR Remote Number Required unice rtr ber rtt I CREER ide AT kZS Simulated Ringback AT ZV Password Verification NO NO NO XO
66. 1 2 AT Commands Contents continued AT amp V ADEST Modem Status Display ee cie csoveasscssesescesrauccersnuescsus Operating Status Messages ii ccssscesgassccainatssenscesisescapseveausidassxsnsaguamseiaies DITE Be Salus SUIBIBEIBEY 25 oburicr opere px eoe mo cies onda ERU e Casbl a xen LE Du da Error Correction and Data Compression Status eese Transmit and Receive Throughput and Link Utilization Status Display EIA TIA 232 D CCITT V 24 Signal Statu 1o nes Slams Sunimary LINS sansan Don ecu hi pou D Febplo ete Ue Cra eta Display Modern IL rer no REIR anaa COMS Patarbter S 8 IS adco sce eiie ceri ho bed Qs Mx DIS eo R NERA REP t Db on Di ee EUN AT amp W Save Changes Creating New Option Sets sess SEA UC IER cag ein is d ceci Ee DU Dexia x Coca Pi Ge etin ud sic aun o xou eagnd AT amp Y Power Up in Option Set i n terere rer der P ue AT amp Z AT3ECN Enter Telephone Numbers 45 cett rrt tiere ttn dp decns Ge JUST PR BE qusc aveo Ubi cob le ug Db eei Eo CCP RUD DG Usa daa bebe ATKAP Adaptive Rate i i rtr rb R IEEE IDE Ped PLE EE ATRAS Answer m Rectoral 4 25 rape eeo eie com ero eek oro e En D E EEEN ees Ep S EP iM Cd MI ATISBD Blind Dial orrei AT A KBK Break Handling i 4e ccr beenden b Pri belt ai ATCA CAuswerLiriguinale Mode orneeic trip etr etes be Sent ri Entre Coane AED DUI Loss DISGOBDBEEL secari IEEE CUR
67. 4 selecting 1 25 transmit level 2 24 dial modifiers 2 33 3 3 and callback with originate only modems 2 33 Dial Wait 3 3 Disconnect 3 5 Flash 3 4 for LPDA2 3 28 Pause Delay 3 3 presentation characters 3 5 Pulse 3 4 Quiet Answer 3 5 Return to command state after dialing 3 4 Reverse 3 5 Tone 3 4 Dial option 1 13 1 14 dial response data field for LPDA2 3 31 dial restoral and Option Set 4 2 10 configuring 2 10 Dial Restricted option 1 101 Dial Stored Number option 1 61 Dial to Leased option 1 69 dial type 1 13 Dial Wait option 1 57 dialing answer modem 2 30 2 32 direct 3 20 using V 25 bis ACU 3 20 during restoral 2 10 manual 2 33 D Continued dialing Continued stored telephone numbers 1 10 1 61 unstored phone numbers using ATD command 1 10 using Enter Then Dial option 1 10 unstored telephone numbers 1 10 dialing manually using V 25 bis ACU 3 21 DIALING OPT S menu 2 25 figure 2 25 options with AT command equivalents 2 25 dialog state with V 25 bis 3 18 direct answering 3 20 Direct data transfer mode 1 94 direct dialing 3 20 direct mode 3 20 disabling password protection 1 80 disconnect automatic 1 69 summary of reasons for 1 38 disconnect command for LPDA2 3 31 Display Modem ID 1 23 displaying modem ID 1 23 modem status 1 31 DL TX option 2 24 DLC 3 12 DLP EIA TIA signal status description 1 37 DSR and AT amp S 1 29 EIA TIA signal status description 1 37 DSR control 1 29 DTE Circuit 140 option 1 69 DTE
68. 600 T D in the status display NOTE If the data loops back to the remote terminal without errors the modem passes the test If the data does not loop back to the remote terminal run the test again If it fails again check to make certain that the DTE and modem speeds match 6 To end the test use the front panel keys to move through the TEST OPT S menu until the modem displays TEST End Test 7 Press The modem displays Test Completed NOTE If the modem begins the test operating in the MNP or LAPM Reliable mode it attempts to restore the Reliable mode after the test To start this test using an AT command enter the following command from an attached terminal AT amp T6 CR To stop this test enter the following command When the screen displays OK enter AT amp TO CR to end the test The screen displays the OK message indicating that the test has been terminated NOTE This test also can be terminated automatically by entering a nonzero value in the Test Timer S Register 18 The function of S Register 18 is valid only when loop back tests are issued using the AT amp T command S Register 18 cannot be used to automatically terminate loopback tests if the test is initiated from the front panel When the test terminates the screen displays No Carrier This test will run indefinitely if not programmed to terminate itself through this S Register 18 Testing Your Modem 4 11 Remote Digital Loop
69. Automatic Calling Interfaces Reliable Connection Response If you are using MNP or LAPM you may want a response sent to your DTE which indicates when a reliable link was negotiated with the remote modem To receive the reliable message you have to set the V25 Resp option in the ACU OPT S menu to V25 rate In addition you must set the Reliable Msg option to Long or Short A reliable CONNECT message would look like this CNX 9600 RELIABLE If you do not want the CONNECT message to display the data rate set the Call Progress option in the ACU OPT S menu of the front panel display to 0 In such a case the CONNECT message looks like this CNX RELIABLE Programming Guide for the V 25 bis Auto Call Unit ACU This section will help programmers to develop software commands The V 25 bis command set supports both bit and character oriented synchronous protocols using either ASCII or EBCDIC character sets The V 25 bis ACU also supports asynchronous data formats that use the ASCII character set Appendix A ASCII EBCDIC Hexadecimal Equivalents provides the hexadecimal equivalents for both ASCII and EBCDIC of the characters and symbols defined by the V 25 bis specification Frame formats for both bit and character oriented synchronous and asynchronous transmission are defined in the following sections The 326X Series Modem supports most individual protocol elements necessary for the modem and terminal to communicate accurately In all
70. Automatic Calling Interfaces 3 3 Table 3 3 Dial Modifiers Continued Modifier Function Description P p Pulse Tone Flash Return to command state after dialing When either of these modifiers P p are encountered in a dial string if Dial Auto AT P2 DIALING OPTS menu the Dial option setting is not changed from Auto If set to other than Auto the pulse tone setting is modified to force pulse dialing If no pulse dial modifier is inserted in the number stream the modem dials according to the pulse tone setting of the Dial option in the front panel DIALING OPT S menu These modifiers can also be used as a command outside of the dial string When either of these modifiers T t are encountered in a dial string if Dial Auto AT P2 DIALING OPTS menu the Dial option setting is not changed from Auto If set to other than Auto the pulse tone setting is modified to force tone dialing If no tone dial modifier is inserted in the number stream the modem dials according to the pulse tone setting or the Dial option in the front panel DIALING OPT S menu These modifiers can also be used as a command outside of the dial string Instructs the modem to flash hook a control signal used by many PBXs to enable special dialing features such as transferring a call call forwarding etc Instructs the modem to return to the command state after dialing without breaking the connection The modem can dial
71. CR gt The Front Panel You can enter the following alphanumeric characters 0123456789ABCD AT Commands 1 101 X ZP cZR AT ZP Select Tones with Access Security The AT ZP Tone command controls the type of tones used by your modem to ficcesssecurTy p e e o alert the caller to expect a callback and to enter the access security password AT Command Option Setting Setting Description None 0 No tones are generated by the answer modem all Prompt Only 1 Upon answering a call the local modem sends the caller a dial tone This is a prompt for the caller to enter the access security password The dial tone lasts for the amount of time specified by S Register 45 The caller must enter the access security password in the amount of time specified by S Register 46 This setting is intended for manual dialing only Ack Only 2 After validating the password the modem generates an acknowledgment tone before hanging up This indicates to the caller that the access security password is valid and that the modem should expect to receive a callback Upon hearing the tone the caller should hang up immediately This setting is intended for callback only Prompt Ack 3 Upon answering a call the local modem generates both the prompt and acknowledgment tone at the appropriate times This setting is intended for manual dialing only AT ZR Remote Number Required The AT ZR Rmt Num Rqrd command specifies whether a remote callback
72. Circuit 141 option 1 68 DTE Inactivity 1 93 DTE Pin 25 option 1 72 DTErate 1 58 status summary 1 34 DTMF equivalencies 2 33 tones and access security 2 33 DTR and configuring for dial restoral 2 10 and restoral 2 10 and the AT amp D command 1 20 control 1 20 cross references for restoral 2 13 delay 1 61 D Continued DTR EIA TIA signal status description 1 37 front panel option 1 20 option setting 2 13 DTR Delay option 1 61 E EC error correction option 1 62 EC ID option 1 94 EC DC OPT S menu 2 14 AT command equivalents 2 14 EC DC options menu 2 14 EIA TIA 232 D CCITT V 24 Signal Status 1 37 messages 1 37 EIA TIA signal status ALP 1 37 AOP 1 37 CTS 1 37 DCD 1 37 DLP 1 37 DSR 1 37 DTR 1 37 RTS 1 37 enabling password protection 1 80 Enter Group PW option 1 101 Enter Then Dial option 1 10 entering telephone numbers 1 48 environmental limits specifications for 5 4 Error codes Sense bytes 3 30 error correction 1 62 2 14 and dial restoral 2 11 and EC DC OPT S menu 2 14 ID 1 94 identification for MNP 1 94 LAPM 1 62 MNP 1 62 reliable messages 1 99 V 42 1 62 Error Correction Status display 1 35 error messages during self test 4 3 error probability 1 41 EST OPT S menu figure 2 5 Ext Select option 1 79 External Control option 1 79 External Option Set Select 1 79 external transmitter timing 1 47 Index 5 F FAILREL message 1 35 far end echo 1 41 Fast Call option 1 63 flow control DTE to modem 1 64
73. Command Option Setting Setting Busy Out End Test 1 Description Makes the modem appear busy to incoming calls To configure the modem to use the Busy Out feature refer to the AT K LT DTE Pin 25 option description in this chapter If Busy Out is enabled ATHO will disconnect the busy out condition Also if the modem is in escape mode the modem has transitioned to command state from the data state online or test the ATHO command disconnects the modem Refer to Chapter 4 of this guide or the AT amp T option description within this chapter for a detailed description of how to initiate and terminate the Busy Out test ATL Speaker Volume v us The ATL Volume option sets the speaker volume in the modem Option Setting Medium all Loud Soft AT Command Setting 2 Description Medium Loud Soft AT Commands 1 11 M O1 ATM Speaker Control v The ATM Speaker option controls the operation of the modem s speaker AT Command Option Setting Setting Description Dialing 1 The speaker comes on while dialing and training all but stays off when the modem enters data mode On The speaker is always on Security 3 The speaker goes on when dialing is completed and goes off when the modem enters data mode Off 0 The speaker is always off ATO1 Retrain ATOI allows you to return to data mode and initiate a retrain with the remote CE e e e modem Refer to Chapter 4 T
74. Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country 2 24 Telco Options Dialing Options Dialing Options TELCO OPT S vk Figure 2 9 illustrates the DIALING OPT S menu DIALING OPT S menu options control parameters used to dial phone numbers DIALING OPT S q FP SECURITY AT si BD gt Blind Dial 2 gt AT TL I Tone Length 72 Dial T one Pulse Cycle 40 Pause Dela y 3 Dial W ait 2 v v v v _ Pulse 33 Sil v Cw v Auto 3 8 KEY Option Included C Countr y Specifi c in Option Sets Option Figure 2 9 DIALING OPT S Menu All DIALING OPT S menu options listed below have AT command equivalents which are described in Chapter 1 AT Commands Options with AT Command Equivalents ATP ATT ATPT Dial Type AT amp P Pulse Cycle AT kBD Blind Dial AT DD Dial Wait Interval ATDP Pause Delay AT TL Tone Length AT TT Call Timeout When entering telephone numbers into modem memory or dialing directly from the modem s front panel you may need to add dial modifiers to your telephone numbers Some applications like V 25 bis ACU and LPDA2 applications require dial modifiers to satisfy special dialing requirements See Chapter 3 Automatic Calling Interfaces for details Dialing Options 2 25 Front Panel Security Optio
75. Contents 326X Series Modem Reference Guide Chapter 1 AT Commands AL Al amp aud AD Command Descriptions 1 aus ce eroe peces eed td sess 1 5 Selecting Options and Settitigs uictor shen seusevesusicssaasssnpsersoeny 1 8 ATD Dialing an Unstored Telephone Number eee 1 10 ATDS AT kDS Dialing a Stored Telephone Number 1 10 ATE Asynchronous Teo a s voe Ginnctin warn EROR UR ERR R eei urea 1 11 ATH Busy Reli 1 11 ATL Speaker Volume i5 een eu oci enn Fest eis pad CoL eg dd 1 11 ATM Speaker Control incipe terc terr aa E MERE Us pc EE 1 12 MERIT art D EE RE 1 12 ATP ATT ATSEPT Dial Type scusscs ccassessissssiascarssnasanrisavenrsecqsusecss eavsesvesssvasoes 1 13 ATO Recalt Cales aco pac cucphing Feci Cabra Mov ai Coes eS Osea Fo oe Fa CCo DV C Cp uR 1 13 AS SRECNE on 1 14 POUT Dial Type MMC eTa RNN ENEE EE A EBEA ua peas 1 14 ALV Resik Code POI 22d da rnb E d 1 14 ALX CAUPON unanimiter eo the Ru pein ad aa Sa 1 15 ALY Longspace Distonnect siciccsssesccssaives sseanssijearnti inrsondeounsisieebiseewwesiies 1 18 ATZ Selec ng anm Opon Set ceni ert Lecco capo E Cede sceneries 1 18 Po Se Oma Me 1 19 Aree CEN EE SOIL oes o Gor ae Fe crbu nba ga Cu Crobu Ue Gutrb Ueuced Ga Uns pike Cup cou e con Up UR 1 19 PTA PR CONTON sacs cc sasesctacsarstadeasstausespgulatesedcveeaiesiaces R 1 20 ATP Reminalize VES e secco poner G
76. I NE Telephone Line Type aues Don eios oe epe ria boton eee Rieeatteaias FAST Modulation Mode uites oe pO REPRE r eden V32 bus Modulation ModE ooa n et pare enine Ravi dua acai EEEE 35 29 Modulation NOB uersu otim eE ano ar ONE FOL Ea 22 bis Modulation Mode aio C pU a La lb e EN eT rb edes DOMUI STI EIE ModE PEOR ERE EE E Bel 212 Modulation Made iei cocer Ee ba Eee ris eh Eo EE er Piu een i wa arl Nledulatiba IWS iui oin Ha ERE dashed ANN EEREQAAEFbR E Bell 103 Modulation Mode i euis ertt Hte CE EE EO BER areas Bavionmental LIMS 4o EE EIE ad ue mE p DR DE Primary Power Requiemistits 1s cose ipnereee rape CORN EOD Wes peto E CS XEM EE DUE ED Transmitter OE ubl oisi code ipm eb o PERPE een eddy obs CR TED UG bcc eilinnpa m CA Cn CA CA CA CA PAA DAM AANA MAN Un Un UA Gg UU Q2 b2 b2 P2 P2 P2 LY Contents continued Appendix A ASCII EBCDIC Hexadecimal Equivalents Appendix B Options and Displays Worksheet Index xi Chapter 1 AT Commands Contents AT AT amp and AVS Command Descriptions 1a aeos tos esae aco sistat qus 1 5 Selecting Options and Settings sc ssascciicssssscavvckscesvdissaunss iossinssnuersesicureitene 1 8 ATD Dialing an Unstored Telephone Number ncc treten 1 10 ATDS AT KDS Dialing a Stored Telephone Number 1 10 ATE Asynchronous BOBO anite eie be RI t USER GA PUR ERG CH eons 1 11 ATH Busy Out Tesi sccsscissesscts compe scnapsivsiousvsiscarschoan
77. L The modem sends a VAL message when the modems switch to data mode only V 25 bis The modem sends a VAL message upon receipt of the dial command and a CNX message once an answer back tone is received from the remote modem V 25 rate The modem sends a VAL message upon receipt of the dial command and a CNX message followed by the DTE to modem data rate once the modems switch to data mode Result Code Responses When using V 25 bis the 326X Series indicates a valid connection when it switches to data mode by turning DSR EIA TIA 232 D Pin 6 V 24 Circuit 107 and DCD EIA TIA 232 D Pin 8 V 24 Circuit 109 from off to on In addition to this hardware response you may want to receive call progress responses at the DTE The modem uses the VAL valid and CNX connect messages to indicate a successful connection You enable the result code responses through the V25 Resp option in the ACU OPT S menu in the front panel display The following settings for the V25 Resp option apply None The modem does not send any CONNECT messages to the DTE VAL The modem sends a VAL message when the modems switch to data mode only V 25 bis The modem sends a VAL message upon receipt of the dial command and a CNX message once an answer back tone is received from the remote modem V 25 rate The modem sends a VAL message upon receipt of the dial command and a CNX message followed by the DTE to modem data rate once the modems switch to data mode 3 12
78. N option AT K MD under the MODULATION OPT S menu is set to On 10 To use error correction set the Mode option AT KCA under the MODULATION OPT S menu to Reliable Auto Rel or Spd AutoRel While operating on the leased line if the Mode option is set to any of the Reliable settings Reliable Auto Reliable or Speed Dependent Auto Reliable it is treated as if Mode Reliable If the Mode option is set to a Reliable setting while restoral is operating that setting is treated normally Restoral Options 2 11 Restoral Options 2 12 Restoral Options 11 To redial failed call attempts enable the Auto Redial option AT KDR in the 12 13 Data 9600 T D menu When restoral is initiated and redialing is enabled and a call attempt fails the modem does not return to the leased line until the specified number of redials occurs or the call succeeds When the modem is configured for any one of the AT KRE option settings if the remote modem is a 326X Series Modem and is not in data mode it answers the call Otherwise it answers the call based upon the setting of the Ans Rest option under the RESTORAL OPT S menu When the modem is configured for any one of the AT KRE option settings except 108 ACU or 116 ACU if a call fails the originating modem disconnects from the dial line and returns to the leased line unless the Auto Redial or Link Phone options are enabled If the Link Phone option is enabled the modem calls
79. Off the modem is unable to detect when the central office has initiated a loopback test on the data communications line AT Command Option Setting Setting Off 0 Low BER 1 High BER 2 all 1 92 AT Commands Description The modem does not automatically initiate retrains but will respond to retrains from the remote modem Using C Fast V 32 bis V 32 or V 32 Uncoded the modem retrains when the bit error rate BER exceeds approximately 104 for eight seconds Using V 22 bis the modem retrains when the bit error rate BER exceeds approximately 1074 for one second The Low BER setting is more sensitive than the High BER setting When ARS is enabled this setting has no meaning Using C Fast V 32 bis or V 32 the modem retrains when the bit error rate BER exceeds approximately 102 for eight seconds Using V 22 bis the modem retrains when the bit error rate BER exceeds approximately 103 for one second When ARS is enabled bit error rate is always used The High BER setting is less sensitive than the Low BER setting NOTE Motorola recommends this setting for most applications SC SI AT SC Speed Conversion v TERMINAL OPT S b E Speed Conver The AT kSC Speed Conver command determines whether the modem uses the speed conversion feature NOTE This option does not apply when the modem is in the Direct or synchronous data transfer mode AT Command Option Setting Setting Description Off 0
80. Option Automatic Disconnect 1 69 AT KLL Local Analog Loopback Test Busy Out eesses 1 70 ADSELN Link Telephone Numbers J ie oconeca cipe oe Feb hia Fete eae ea obs 1 70 AISLS Low Speed 1i trii npo XR bI EP RII E E DG EE eR PLE GE 1 71 Pol ELT ES PI 29 A A E E A deine tis aimee 1 72 ATHEMID PS UN Stef DS 215r secet eerte roc tra RApr t SIE EE E Pr ERR EI tn pis pbtves 1 72 AT RMF Modem Flow Control cs acea treten rt eerte Prebue Fe er Fei a 1 74 JT eI Modulation Mode csc es eseziccisetindershindesehiatesdiccesaeietesnlinerncadae 1 74 POL SVU IOS DISPO E e NOTTE TA T 1 76 AULEM AT IS CORON TY sonirosa 1 76 AISENIS CAT NIGSSHEER isse reb Loc ite vu essei poi aba Fed IER Feb nC otra Leon 1 76 ATRMX Maximum CI ET 1 77 APRENE OBUITOECIDOQR 12 eraciserer e nhe Cel Di Rer oem ata eter RENREN 1 77 ATENG Network Compensation 5r rear rr vtr Pr Per bc Rb cores rvla VES 1 78 AT KND View Stored Telephone Numbers esee 1 78 ZI SOC Ce Sie rial Control qu iode cem pt E Or a oda oo 1 79 ATSEOP External Option Set Select 1 ance cia siveceawia Eco kp D ee eee Egon 1 79 AKOS OVErs o 1 80 AT PE Enable Disable Password Protection sese 1 80 PO SEPE Set Procion auis b Gp HEREDI PER bb RH DM eR iS 1 80 AT Commands 1 3 1 4 AT Commands Contents continued AT EPN Unlock Password PYol tHORH seca ci eric e
81. Pin 22 To answer an incoming call the DTE must raise 108 2 DTR and enter dialog state Figure 3 5 illustrates the status of the pertinent signals for the idle state when no incoming calls are detected DSR 107 Off DTR 108 2 Off CTS 106 Off DCD 109 Off No Incoming Calls Figure 3 5 Idle State Automatic Calling Interfaces 3 17 Dialog State If the DTR option in the modem is set to High and the phone line is disconnected the modem is in dialog state If the DTR option in the modem is set to 108 2 the DTR signal from the DTE must be turned on to enter dialog state The modem responds by turning Circuit 106 CTS on and entering dialog state Once in dialog state the modem accepts V 25 bis commands from the DTE Figure 3 6 illustrates this signal ing Step 1 CIS 106 On On DTR 108 2 On IDEEN DCD 109 Off j Step 2 106 On 3260 Figure 3 6 Dialog State When the modem receives the CIC CRSa or CRNn commands the modem enters connecting state and performs as instructed If you enter the DIC command the modem disregards an incoming call and stays in dialog state When the modem is in dialog state and the Answer option in the ACU OPT S menu is set to answer automatically the modem answers incoming calls after the number of rings specified Once the modem answers a call it enters connecting state Connecting State Once the modem enters connecting state it turns 106 CTS off and do
82. RERE IIR PERI LESE AISECNE Connect Message usc curi ere tit etai cond bl Es dta Fed ra Fab niet essai epis AT KCN AT amp Z Entering Telephone Numbers esee ATISCE ADSER IG To canes on tent bein Ce nb Coro Feci spun eor o Ctrl ates APRDA Deranlt DIGlUDE iuis etr oiaoi EE ATODEB Bulle EGO ep nap tn ba e entr odds roa Ee rt aaa AISDC Data Compression 2 erroe ttr p c rct iii aia POT db EPICURI CE ACU ARDE INTE Rate Vics e AT RI Data doas AN E T AT3DI Leased to Dial OpOI uui seii i nri ER RI a e bote EDD IHRE iO v hu r lca eui xr a caca ss TT es es Ok cadre rir AUAUNA RA A A A HA HWW WW W WH W OOMmMAIADMAPHPHPHWWNHNK TOO OANANMNMRK RP ONAN AHNe Contents continued NIGEL SODALES Delay d essen editi Ee rete PR aes HIR n aE AEAEE rL UAR 1 60 ALRDP Pause 7r eicues 1 60 Al eR Ate Redial eic uae RR bab D abt Potete brun p ci 1 61 AT KDS ATDS Dial a Stored Telephone Number esses 1 61 EUN PENIDIE NR CV NM uo 1 61 AT EB UEITOPUDEPEPLIOR ai oiecenr otto tian prb poser EE ERE RAF DERE du FPE Ls Usar NUES 1 62 rx red Wei eer LR 1 63 JAY SEPLA PI C Ontol 43 5 ann o DH ER br bt b DH epi 1 64 ATH Hod DEIN er 1 66 AFRLAIDTE Cinram Mie n 1 68 ATELC Line Conpensdbbil san vais tata p Ctr ab doti eel oda proa seen ead 1 68 ALSLDTDEBGBOnU VA idepetsrdie br Ree PEDRO P HERE REDE P EROS 1 69 AT KLE Dial to Leased
83. RTS DCD Remote Signaling 1 96 ST Modem Status Display 1 31 1 97 STO 2 43 TD Throughput Delay Minimization 1 97 TL Tone Length 1 98 TT Call Timeout 1 98 XC Error Correction Reliable Messages 1 99 XC Rel Msg 1 99 7C Callback Feature 1 100 ZD Dial Restricted 1 101 ZI Enter Access Security Group Password 1 101 ZI Enter Group Password 1 101 ZP Select Tones with Access Security 1 102 ZP Tone 1 102 ZR Remote Number Required 1 102 ZS Simulated Ringback 1 103 7V Password Verification 1 103 AT ACU and remote configuration 2 38 ATY and configuring for dial restoral 2 12 configuring your modem with 2 2 D Dialing an Unstored Telephone Number 1 10 D Enter Then Dial 1 10 dial modifiers 3 3 DS Dialing a Stored Telephone Number 1 10 E Async Echo 1 11 E Asynchronous Echo 1 11 H Busy Out Test 1 11 L Speaker Volume 1 11 L Volume 1 11 M Speaker 1 12 M Speaker Control 1 12 A Continued AT commands Continued O1 1 12 P Dial 1 13 Q Result Codes 1 13 Q Rslt Code 1 13 S S Register 1 14 T Dial 1 13 1 14 V Result Code Format 1 14 V Result Form 1 14 X Call Progress 1 15 Y Longspace Disconnect 1 18 Z 1 18 Z Selecting an Option Set 1 18 AT Form option 1 26 AT Msg option 1 76 ATTEMPT message 1 35 Auto Redial option 1 61 2 12 and the Link Phone option 1 61 auto retrain 1 92 Auto Type option 1 52 auto call unit See ACU automatic answer 1 49 automatic disconnect 1 69 automatic restoral 2 10
84. S Register 7 See S Reg isters in Chapter 5 of the 326X Series Modem User s Guide NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country AT Commands 1 57 X DE AT DE DTE Rate Cw smi This option governs the speed at which the modem communicates with the DTE during data ACU and escape modes Option Setting 326X V32 326XFAST 326XFAST bis Modem Modem SDC Modem Auto 1 Auto 1 Auto 1 128 0 128 0 115 2 115 2 96 0 96 0 76 8 76 8 72 0 72 0 64 0 64 0 57 6 57 6 57 6 56 0 2 3 AL U S Can Only 48 0 2 3 AL All Other Countries 38 4 38 4 38 4 28 8 28 8 26 4 26 4 24 0 24 0 2 3 AL 21 6 21 6 19 2 4D 19 2 4D 19 2 16 8 16 8 16 8 14 4 14 4 14 4 2 3 4L 12 0 12 0 12 0 9600 9600 9600 7200 7200 7200 4800 4800 4800 2400 2400 2400 1200 1200 1200 300 300 300 1 58 AT Commands AT Command Setting 22 Description Modem uses the autobaud feature to determine the rate at which to operate For a detailed description of the autobaud feature see Autobaud Feature in Chapter 5 of the 326X Series Modem User s Guide NOTE The Autobaud feature is not supported in synchronous operating modes When configured for synchronous operation if you select Auto the DTE will be driven at the previous DTE rate selected the factory default is 9600 bps The DTE p
85. Series Modem models that include the Restoral option are the 3261 3263 3266 and 3268 AT Command Option Setting Setting Description Off 0 This option disables the initiation of restoral 1 2 3 4D FP Only 1 Manual initiation allows you to initiate and terminate restoral by pressing the Talk Data key key in the Home position on the modem s front panel FP 108 1 2 The 326X Series Modem allows the DTE to initiate restoral using its DTR signal In DTR restoral an off to on DTR transition from the DTE interface initiates restoral This option is provided for DTEs that cannot manipulate Circuit 116 for restoral purposes In DTR restoral either the answering or originating modem can initiate restoral when the connected DTE turns DTR from off to on by dialing the number stored in its telephone directory based on the setting of the Default Dial option Once a call is successful an on to off transition of DTR from the DTE disconnects the modem from the dial line and returns it to the leased line Once restoral is terminated by any means other than the DTR signal the DTR signal from the attached DTE must be turned off before an off to on DTR transition can initiate another restoral attempt NOTE The Ext Select option overrides DTR restoral if Ext Cntrl option is configured for Pin 20 and the Ext Select option is configured for a setting other than Off AT Commands 1 87 RE 1 88 AT Commands AT Command Option Setting Settin
86. T D T D T D T D T D T D T D T D T D T D T D T D T D T D T D T D T D T D T D T D T D T D The modem is transmitting at rate bps The modem is in dial restoral mode and transmitting at rate bps The modem is holding the dial line while it tests the leased line and transmitting at rate bps The modem is dialing a telephone number The modem is not connected to the telephone line The modem is in a local analog loopback test at rate bps The modem is executing a training sequence for a local ana log loopback test The modem is running a test at rate bps The modem failed a local analog loopback test The modem appears busy to incoming calls The modem is waiting before dialing a number A call attempt failed and the modem is waiting before dialing the linked telephone number A call attempt failed and the modem is waiting the specified interval before redialing The modem is waiting to call back another modem The modem is connected to the telephone line and attempting first training sequence with the remote modem The modem is training The remote modem has requested a retraining sequence A handshake has failed The modem is pausing before attempting to resynchronize by retraining The modem is waiting for access security tones from the remote modem The modem is disconnecting The modem is performing a receive buffer delay The modem is per
87. T Msg command determines when the AT connect message is sent to the DTE Option Setting Setting Before CD all After CD AT Command 1 Description The AT connect message is sent to the DTE before DCD is raised The AT connect message is sent to the DTE after DCD is raised MX xNB AT MX Maximum Rate MODULATIONOPT S c The AT k MX Max Rate command sets the maximum rate at which the modems communicate over the analog network Settings will vary depending on the modulation mode you choose but some of the following speeds will be available Option Setting AT 326X V 32 326XFAST 326XFAST Command Maximum Modem bis Modem Modem SDC Modem amp Setting Modulation Hates bps 24 0 24 0 11 24 000 all all 21 6 21 63 10 21 600 19 2 19 23 9 19 200 16 8 16 83 8 16 800 14 4 14 4 14 4 7 14 400 all 12 0 12 0 12 0 6 12 000 9600 9600 9600 5 9600 7200 7200 7200 4 7200 4800 4800 4800 3 4800 2400 2400 2400 2 2400 1200 1200 1200 1 1200 300 300 300 0 300 NOTE When the C Fast Auto modulation mode is selected the 326X Series Modem negotiates data rates from 300 to 24 000 bps When the C Fast Only modulation mode is selected the modem negotiates data rates from 9600 to 24 000 bps AT NB Buffer Option v CE The AT K NB Buffer Option allows you to specify whether normal or reduced sized buffers are used to store data received from a local DTE Use this option if you have DTE to DTE flow control
88. T S HN Dte Pin 25 The AT kLT DTE Pin 25 command controls whether the modem uses EIA TIA 232 D Pin 25 as an input or an output Set rear panel Switch 2 to match the setting of this option see Table 2 2 in Chapter 2 of the 326X Series Modem User s Guide for more information on rear panel switches Option AT Command Setting Setting Description Busy 0 The DTE signals the modem on Pin 25 to make the modem appear busy to incoming calls Set rear panel DIP switch 2 to the off up position Also for this feature to work the AT amp J Telco option command must be set to RJ4MB Test 1 The modem signals the DTE on V 24 Circuit 142 all Pin 25 when a test is in progress NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country AT MD PSTN Signaling MODULATIONOPT S PSTN 1 72 AT Commands The AT kMD public switched telephone network PSTN command determines e how your modem handles disconnect signaling when operating in the C Fast V 32 bis or V 32 modulation mode Option AT Command Setting Setting Description Off 0 Your modem disconnects without signaling the remote modem On 1 Your modem signals the remote modem to disconnect by all sending PSTN cleardown MD The following two matrixes summarize how the settings for the AT MD PSTN and the ATY Longspace commands inte
89. The various settings for the DTR option in the modem are described in Chapter 1 AT Commands in the AT amp D section Also see the Interpreting the DTR Option Setting section following these procedures It summarizes the relationship of DTR signal behavior to Restore and DTR option settings 5 Make sure that the Line option AT amp L under the MODULATION OPT S menu is set in both the local and remote modems for connection to either a two or four wire leased line 6 To dial during restoral set the Default Dial option AT KDA under the ACU OPT S menu to dial from the address in which you plan to store the remote modem s telephone number 2 10 Restoral Options Restoral Options 7 Enter a phone number in the address selected by the Default Dial option AT KDA under the ACU OPT S menu To use the Link Phone option AT KL NN enter a phone number in each address to be used 8 During a dial restoral if you want the modem to disconnect from the dial line automatically after a specified interval set the D to L Dial to Leased option under the RESTORAL OPT S menu in the originate modem only If you want to hold the dial line and test the leased line after this interval set the Hold Dialine option under the RESTORAL OPT S menu the same in both modems While operating in dial restoral the modem periodically returns to the leased line according to the time interval specified in the Dial to Leased option to test the line in
90. When you issue the RLF command the modem precedes each forbidden number currently on the forbidden list with LSE LSF 8005551212 In this example the number 8005551212 is on the forbidden call list LSD List of Stored Delayed numbers When you issue the RLD command the modem precedes each number currently on the delayed list with LSD and follows each number with the number of minutes that number will remain on the list LSD 8005554901 45 In this example the number 8005554091 is on the delayed call list and cannot be called for 45 minutes LSN List of Stored Numbers When you issue the RLN command and the modem has numbers stored in memory the modem precedes each number stored in modem memory with LSN as shown LSN1 1 234 555 8910 LSN2 1 222 555 4444 LSN3 1 333 555 5555 In the example above the modem had phone numbers stored in addresses 1 through 3 VAL VALid The modem responds to CIC DIC and PRNa n commands with the VAL response whenever the modem can carry out the command The modem also uses the VAL response during call progress reporting which is described in Call Progress Responses following the next section 3 10 Automatic Calling Interfaces Call Failure Responses When you attempt a connection with the CRNn and CRSa commands the modem sends a call failure response to the DTE if the call is unsuccessful Table 3 7 describes each response and the conditions under which each appears The Call Failure response
91. a proprietary modulation mode Modulation mode specifications are not available for publication V 32 bis Modulation Mode 5 2 Specifications Data Rate 14 4 12 0 9 6 7 2 4 8 kbps Baud Rate 2400 baud Carrier 1800 Hz Modulation Quadrature Amplitude Modulation with trellis coding at 14 4 kbps 12 0 kbps 9600 bps and 7200 bps Quadrature Amplitude Modulation without trellis coding at 9600 bps Phase Shift Key modulation at 4800 bps CCITT V 32 bis compliant full duplex V 32 Modulation Mode Data Rate 9 6 4 8 kbps Baud Rate 2400 baud Carrier 1800 Hz Modulation Quadrature Amplitude Modulation with trellis coding at 9600 bps Quadrature Amplitude Modulation without trellis coding at 9600 bps Phase Shift Key modulation at 4800 bps CCITT V 32 compliant full duplex NOTE In V 32 Uncoded Mode the modem functions as described above for V 32 modulation Mode The only exception is that the modem does not use trellis coding V 22 bis Modulation Mode Data Rate 2 4 1 2 kbps Baud Rate 600 baud Carrier Frequency Answer Modem 2400 Hz Originate Modem 1200 Hz Modulation Quadrature Amplitude Modulation at 2400 bps Phase Shift Key modulation at 1200 bps CCITT V 22 bis compatible full duplex V 22 Modulation Mode Data Rate 1200 bps Baud Rate 600 baud Carrier Frequency Answer Modem 2400 Hz Originate Modem 1200 Hz Modulation Phase Shift Key modulation at 1200 bps CCITT V 22 compliant full d
92. ace for 4 seconds The modem does not disconnect when it receives space that exceeds 1 6 seconds in duration AT KMD PSTN Off The modem disconnects when it receives space that exceeds 1 6 seconds in duration When terminating a call the modem sends continuous space for 4 seconds The modem disconnects without signaling the remote modem and without sending continuous space for 4 seconds The modem does not disconnect when it receives space that exceeds 1 6 seconds in duration AT Commands 1 73 E MF gt MM AT MF Modem Flow Control v The ATXMF Modem Flow command allows the modem to generate and respond p to XON XOFF flow control signals received at the DIAL LINE or LEASED LINE port NOTE This option only applies to the Normal data transfer mode Option AT Command Setting Setting Description Off 0 The modem flow control is not used On 1 The modem periodically sends XON signals to all the remote modem when it is able to receive data When the modem becomes unable to receive data it sends an XOFF signal to the remote modem Likewise the modem acts according to XON XOFF signals received from the remote modem by starting or stopping the transmission of data AT MM Modulation Mode The AT MM Mod command determines the modulation mode used by the modem e e in data transmission Changing modulation mode resets the AT MX Max Rate and ATE MN Min Rate commands to their defaults
93. ach modem s front panel LEDs reflect only its own operational status In other words you cannot view the LED status of a remotely connected modem The following features and functions are restricted for a 326X Series Modem under remote configuration control Dialing Testing nitiating a remote configuration session Searching for and setting a remote modem s leased line address Changes made to the remote modem s configuration using the remote configuration function do not take effect until you terminate the session If you abort the session or if the modems disconnect during the session changes made to the remote modem s configuration are not saved 2 38 Remote Configuration Options Remote Configuration Options If your modem is under remote configuration control by another 326X Series Modem and you have disabled your front panel using Switch 3 on your modem s rear panel the controlling modem still has full front panel control of your modem See Table 2 2 Rear Panel Switches in Chapter 2 Installing Your Modem in the 326X Series Modem User s Guide If your modem is under remote configuration control by another 326X Series Modem and you have disabled your modem s AT auto call unit using Switch 5 on your modem s rear panel see Table 2 2 Rear Panel Switches for more details the controlling modem will still have full AT ACU control of your modem Your modem to modem speed must be 7200 bps or greater for a remote con
94. ack option AT ZC is set to Intern n it will disconnect after validating the access security password and dial the number stored in memory location n Before setting this strap in option in the answer modem however the calling modem s dial string must have a semicolon followed immediately by a capital H H at the end of the calling string for example 5552345 1111240 H 2 30 Access Security Options Access Security Options If the Calling Modem Is Providing the Callback Number You must specify the callback number along with the password In the answer modem 1 Verify that PW Verify Intern AT KZV1 ACCESS SECURITY category 2 Set the Callback option AT KZC ACCESS SECURITY category to either Remote AT amp ZC10 or RMT Ind AT amp ZC12 Refer to the AT amp ZC description in Chapter 1 AT Commands 3 Enter the access group security password using the Enter Group PW option AT ZI ACCESS SECURITY category Refer to the AT gt ZI description in Chapter 1 AT Commands of this manual for details on how to enter an access group security password 4 Set the modem to answer incoming calls The modem will answer the call based on how the Answer option AT K AA is set ACU OPT s category After setting the answer modem as indicated in steps 1 4 above next you will dial the answer modem and provide the access security password When dialing the answer modem you enter a dial string telling the modem how to co
95. ailable Via your AT ACU Via your front panel Whether you choose to use your front panel or your AT ACU the remote configuration feature gives you control over both your modem and the connected modem Remote Configuration Options 2 37 Remote Configuration Options AT ACU If you use your AT ACU to establish a remote configuration session with the connected modem any status information you display and any configuration changes you perform via your AT ACU affect the remote modem only Your control terminal displays the AT ACU information of the remote modem not your own However you can still use your front panel to read your status information and configure your modem Also your modem can use its AT ACU to establish a remote configuration session even if the remote modem s ACU Select option is set to V25b V 25 bis ACU LPDA2 or Off NoACU Front Panel If you use your front panel to establish a remote configuration session with the connected modem any status information you display and any configuration changes you perform via your front panel affect the remote modem only Your front panel displays the front panel information of the remote modem not your own However you can still use your AT ACU to read your status information and configure your modem When a 326X Series Modem is under remote configuration control by another modem its front panel RC NC LED blinks and its front panel displays UNDER RC T D NOTE E
96. al is off the modem is in originate mode if the signal is on the modem is in answer mode Auto A 3 Auto answer in originate The modem configures itself as an inO originating modem after auto answering a call In leased line operation the modem functions as if it is set to originate calls NOTE The functions provided by this setting only apply when your modem auto answers AT Commands 1 53 CD amp CM CN amp Z CT amp R AT CD DCD Loss Disconnect v TERMINAL OPT S I DCD Loss Dis The AT KCD DCD Loss Dis command determines how long the modem waits before it disconnects due to loss of carrier DCD If the S10 setting is selected and set to 255 or Off the modem attempts to retrain indefinitely For C Fast V 32 bis and V 32 the AT kCD DCD Loss Dis command determines how long the modem waits for a retrain to complete For the 3 and 7 seconds selections the time is forced to 15 seconds If the S10 setting is selected and set to 255 or Off the modem never disconnects due to a carrier loss Option AT Command Setting Setting Description Off 0 The modem will not disconnect due to loss of carrier 3s 1 The modem hangs up if it loses carrier for 3 seconds Ts 2 The modem hangs up if it loses carrier for 7 seconds S10 3 The modem checks the value stored in S Register 10 to all determine when it disconnects due to loss of carrier See S Registers in Chapter 5 of the 326X Series Modem User s Guide for m
97. an attempt to reestablish the leased line connection If during 2 seconds the modem fails to qualify the leased line data transmission resumes on the held dial line If the modem successfully establishes a valid connection on the leased line within 21 seconds it holds the dial restoral connection for the period of time set in the Hold Dialine option The modem passes data on the leased line while holding the dial line If a retrain occurs while the modem is testing the leased line the test is terminated and the modem returns to the dial line After the timer expires if the leased line is qualified the dial line is dropped and data transmission resumes on the leased line If the leased line qualification fails the leased line cannot be qualified after 21 seconds or if a retrain is initiated another attempt to qualify the leased line is made according to the time specified in the Dial to Leased option NOTE When operating with peer to peer or alternate destination restoral the Hold Dialine option should be set the same in both modems involved with restoral In peer to peer restoral two leased line modems are involved in restoral In alternate destination restoral the remote leased line modem and a local dial modem are involved in restoral Refer to Figures 1 2 A and 1 2 B in the AT KHD Hold Dial Line section of Chapter 1 AT Commands for examples of peer to peer and alternate destination restoral 9 Make sure that the PST
98. ands of this guide For proper modem operation read the following sections explaining how the restoral options operate in conjunction with each other Options with AT Command Equivalents AT AS Answer in Restoral REST ORALOPTS 4 Y EC DC OPT S ATDI Leased to Dial AT HD Hold Dial Line ATLE Dial to Leased Automatic Disconnect AT RE Restoral gt AT RE gt AT DI gt AT LE Ib AT HD gt AT AS Ib Restore Off LtoD Lo wiF ast Dtol Man ua Hold Dialine Off Ans Rest LLF ail F an FP Only T aowfSlo w 115 min im du ays FP 108 1 High F ast 30 min 2mi FP 116 High Slow 1 hour 3mi FP A uto 22 hour 4m smi FP 108 A CU 4 hour m TP l16A CU KEY Option Included 7 in Option Sets Figure 2 4 RESTORAL OPT S Menu 2 8 Restoral Options Restoral Options A leased line failure is one of the most disruptive occurrences in any data communications network When installed as a leased line modem the 326X Series Modem Models 3261 3263 3266 and 3268 can use its dial line capability to restore service when leased line problems occur If the leased line fails or if signal quality deteriorates the 326X Series can redirect data traffic through the Public Switched Telephone Network PSTN over a single dial line Restoral Indications When a 326X Series Modem is installed for restoral operation the following indications are used to deter
99. ane e REL RIS DR E REP teenies 1 22 Pals TIED M P 1 22 ALS Display Modem DE jcc vac uui tdeo i eoi to pci nbus ped me Febr o cta a eacus 1 23 AT Sei Dial Line Jack Ty Pea unies Esc er ELE DP EE e dbcEide 1 24 POV Scat Dp asinis etii E ori eee rien ed ety Few oy Ee Rd DE E Gre Cop na Cav R e epa 1 25 ATA NL CAT Data POBRE oido caries ee N 1 26 ATA UPUSS S voli as porn avd DE Obi aD eee AC Crea Ud D DERE 1 27 Pal OR A See OCS CODWOL eacus 1 28 ATE ADENIETDAR Cota arsine rti be goes ois EUR iien 1 29 POU TOBE AE A PE E A E A EA E AE E 1 30 ALIA ALS TS Acce ROL iiin i r e aA R 1 31 AT amp V AT RST Modem Status Display etienne 1 31 Operalitis Status NIoSsdEES qo uhicoxim ees eite ee tim ERE Mad MORE Co EPI REPE ENA 1 32 DTE Cu EWIEN IIIS M 1 34 Error Correction and Data Compression Status eese 1 35 Transmit and Receive Throughput and Link Utilization Status Display 1 36 EIA TIA 232 D CCITT V 24 Signal Stat s iid caos icem petes prre cepe aceon 1 37 Statis Summary Line T 1 38 Display Modam I uis uestes o dade beoe PH po on eg an eo n Coa 1 41 COMS Parameter SIDE sass cp EIER diocese ENERO LEER PO PER ERR DNE Tum pads 1 41 AT amp W Save Changes Creating New Option Sets sss 1 45 AVEA Rn anbsseuns 1 47 ATGY Power pd COON SE atnutepribiue eb set Des DR ER PES KU nro pua 1 47 Contents c
100. ation 4 To clear the link between memory locations 2 and 4 enter AT kLN2 Effectively memory location 2 is now linked to no memory location LN LS The Front Panel See the Performing Numeric Entry section in Chapter 2 of this guide for details on how to use numeric entry 1 Step across the Status Option Sets Dialing menu by pressing j until you see Link Phone 1 2 Press Vv until the display shows the address number you want to link 3 Press The display shows the address that the selected address is currently linked to For example Link 1 to None In this example the phone number in address 1 is not linked to another number 4 Press wp until the desired address appears and press For example when address 1 is linked to address 2 the display shows Link 1 to 2 In this example if you initiated a call for the number stored in address 1 and the call fails the modem then calls the number stored in address 2 AT LS Low Speed v The ATXLS Low Speed command determines which low speed modulation mode e is used in the event that a higher C Fast V 32 bis V 32 or V 22 bis modulation MODULATIONOPT S mode connection cannot be made when the modem is set to Mod C Fast Auto V32bis Auto or Auto V32 Option AT Command Setting Setting Description Bell 0 Bell 103 modulation mode is used CCITT 1 V 2 modulation mode is used AT Commands 1 71 LT KMD AT LT DTE Pin 25 ww TERMINAL OP
101. ay is 6 seconds Pause delay is 9 seconds Pause delay is 12 seconds Pause delay is determined by S Register 8 See S Registers in Chapter 5 of the 326X Series Modem User s Guide NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country 1 60 AT Commands DR DS DS DT AT DR Auto Redial Data 9600 T D er Auto Redial The AT kDR Auto Redial command determines how many times the modem redials a failed call The modem waits for a country specific time between redials and displays Redial Wait If you enable the AT kLN Link Phone command the modem dials all of the linked numbers before redialing AT Command Option Setting Setting Description Off 0 The modem does not redial an unsuccessful call all 1 15 1 15 The modem redials an unsuccessful call n times NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country AT DS ATDS Dial a Stored Telephone Number See the ATDS command description AT DT DTR Delay v me DTR The AT k DT DTR Delay command determines the amount of time that the modem waits after connecting to the dial line before examining the DTR signal from the DTE If the DTR signal is low the modem disconnects This featu
102. back Pattern Test AT amp T7 4 12 Testing Your Modem Using an internally generated test pattern to provide data the remote digital loopback pattern RDL Pat test examines the transmit and receive circuitry of the local and remote modem and the telephone line IMPORTANT f operating in 326XFAST SDC mode refer to the 326XFAST Synchronous Data Compression Testing section earlier in this chapter for important testing considerations NOTES 1 For maximum reliability run the RDL LDL and RDL Pat tests at a data rate of 19 2 kbps or lower 2 This test is not valid in the Bell 103 or V 21 modulation modes If you attempt to run this test in either of these modulation modes the modem responds with Test Denied The pattern is transmitted by the local modem to the remote modem and then looped back to the local modem as shown in Figure 4 4 Data bit and block errors are recorded during the test and are displayed on the front panel when the test is completed Pattern Checker Figure 4 4 Remote Digital Loopback Pattern Test Before starting an RDL Pattern test make sure your modem has established a connection with the remote modem otherwise your modem will display Test Denied when you start the test To run an RDL Pattern test 1 Establish a connection with the remote modem 2 Use the front panel keys to move through the TEST OPT S menu until the modem disp
103. but cannot train and no call progress messages are received This modifier is used when calling an electronic service that permits the user to transmit numbers using tones once a connection has been established 3 4 Automatic Calling Interfaces Table 3 3 Dial Modifiers Continued Modifier Function Description space period dash parentheses Quiet Answer Reverse Disconnect Presentation characters Causes the modem to look for one or more ringbacks followed by five seconds of silence within the delay time specified by the front panel Call Timeout option If five seconds of delay silence is detected the modem continues to dial the remainder of the dial string If the line is busy the modem hangs up and sends a BUSY message to the DTE If the modem does not detect delay silence or a busy signal the modem hangs up and the screen displays NO ANSWER Must be the last character in the dial string before a carriage return The R modifier causes your modem to originate the call in answer mode and is used to dial an originate only modem Immediately after the dial command is processed an answer back tone is generated and the modem attempts to complete the connection for the length of time specified by the Call Timeout option Causes the modem to disconnect from the dial line This must be the last modifier in the dial string and must also be preceded by a semicolon If the H or
104. cal loops remain the same All other connections are likely to vary from call to call Good quality on one call is no guarantee of equal quality on the next call even if the call is to the same location Poor quality for one call does not mean the line of the next call will be equally poor When monitoring line quality it is important to spot trends and persistent conditions Examples are provided below Consistent poor connections for all local calls can indicate poor quality on the local loop Signs of this are consistent V 32 bis calls which cannot maintain 14 4 kbps speeds Persistent signal to noise ratios above a baseline established at the time of installation are indications of poor line quality A sudden shift from generally good local calls to generally poor local calls can indicate that the local telco has moved the local loop and the quality of the new loop is inferior Consistently poor connections to one destination can indicate poor quality at the remote local loop Signs of this are consistent V 32 bis calls which cannot maintain 14 4 kbps speeds In all cases it is important that you begin operation by obtaining a baseline of normal good quality service of typical connections With this deviations from the normal can be spotted Also to help you locate persistent trends use COMS value information in conjunction with current and historic network information Once the baseline is determined for your network the thres
105. carrier If the modem detects a busy signal before the time specified by the AT k TT Call Timeout command expires the modem hangs up and displays BUSY The length of time between finishing dialing and displaying the BUSY message is the amount of time it takes the modem to detect the busy signal If the modem does not detect data carrier before the time specified by the AT TT Call Timeout command expires the modem hangs up and displays NO CARRIER The length of time between finishing dialing and displaying the NO CARRIER message is the amount of time it takes the modem to detect ringback plus the amount of time specified by the AT amp TT Call Timeout command If data carrier is detected the modem displays a speed specific connect message If the modem is configured for error correction and ATXXC1 or AT amp XC2 Rel Msg Short or Long the modem displays the suffix RELIABLE or RELIABLE EC xxx DC yyy AT Commands 1 17 Y Z ATY Longspace Disconnect we MODULATIONOPT S gt coe The ATY Longspace command enables the long space disconnect function Refer to the AT SMD command Option AT Command Setting Setting Description Off 0 The modem does not disconnect when it receives all space that exceeds 1 6 seconds in duration When terminating a call the modem does not send continuous space for 4 seconds On 1 The modem disconnects when it receives space that exceeds 1 6 seconds in duration When ter
106. cases if the modem receives a frame with a link level error framing error bad parity corrupted frame check sequence the frame is ignored Automatic Calling Interfaces 3 13 Asynchronous Frame Format You can use the V 25 bis commands described in the previous sections from an asynchronous DTE When using an asynchronous DTE you must set the Parity option in the ACU OPT S menu to the appropriate setting Framing characters and data are all assigned parity bits The modem uses a start bit and at least one stop bit for each character Figure 3 1 illustrates a typical asynchronous exchange between the modem and DTE Terminal CRN 555 4231 Modem Legend CR Carriage Return LF Line Feed LF is optional from DTE and may precede CR Figure 3 1 Asynchronous Exchange The V 25 bis ACU allows you to perform line editing if you make a mistake when entering commands Backspace and delete characters can be used to change commands The modem does not execute a command until it receives the carriage return CR If the modem receives a framing error such as a missing stop bit or a parity error it ignores the command and sends no indication to the DTE If a command is entered incorrectly or the modem cannot execute the command entered the modem responds with the Invalid response described in V 25 bis Responses under Addressed Mode in this chapter 3 14 Automatic Calling Interfaces Synchronous Bit Oriented Frame Fo
107. ccsscssccsssussiescavstavesnsinaveurstevaestcsnlassontawrssnees POU Idle T TEE Vi25 bis RESPONSES T Mt LPDAZ ui P LPDAZ Identification Number erret reper reete rre creo en Ip vB annoa TT Terminal sirn Me HIIS TEN T T UI Dial Line Transmit Level 152 2 citant E tappe ara Leased Lane Transmit Level 22 soo test eorura t a Febr s exea Ones dd IR PAP I D Front Panel Security Optio jj eed Unlocking the Modemin E T Ca M prd p ipNE Access Security Options Group PW Buable Dhsable aee inert reb deren le If the Answer Modem Is Not Using the Callback Feature If the Calling Modem Is Using the Callback Feat Manual Dialing and Cal Network Control Options Override Mode Providing the Callback Number ure with an Originate Only Modem back DTMF Equivaleticles 12er ns Network Contool Address ie e thus tre A ERE PEE Ep Ue CEN sebeE Network Control Port R Pass DD sccssccssav stavneens ni Remote ConBeural ton pious asocia C bier sete tvi bo tdg abe cha bo i abra dde Setting a Remote Modem s Leased Line Address ssss Searching for a Remote Setting or Searching for Performing Numeric Entry Modem s Leased Line Address a Remote Modem s Leased Line Address 2 33 2 33 2 34 2 35 2 35 2 36
108. ched terminal From a DTE Personal Computer PC or from a network management system The following sections explain how to initiate tests using the modem s front panel and AT Auto Call Unit ACU IMPORTANT The tests described in this section cannot be run simultaneously Because each test interrupts data flow in your network notify equipment users at both the local and remote sites before starting tests The following types of tests can be run on your 326X Series Modem Loopback Busy Out Retrain Loopback tests allow your 326X Series Modem to send data through a part of the communications system and then loop return it back to the modem If there are errors in the returning data there may be a problem in the part of the system you are testing You can start a remote digital loopback RDL or a local analog loopback LAL test from your terminal if it supports Circuits 140 and 141 respectively For instructions refer to your terminal s user manual The procedure for performing each of the following loopback tests is described in this section Local Analog Loopback Local Analog Loopback Pattern Remote Digital Loopback Remote Digital Loopback Pattern Data Mode Pattern Local Digital Loopback Busy Out Retrain 326XFAST Synchronous Data Compression Testing When performing diagnostic tests while operating in the 326X FAST Synchronous Data Compression SDC mode note the following All tests m
109. cifications environmental limits 5 4 modulation modes Bell 103 5 4 Bell 212 5 3 V2 5 4 V22 5 3 V 22 bis 5 3 V 32 5 3 V 32 bis 5 2 physical characteristics 5 2 power requirements 5 4 telephone line type 5 2 transmitter output level 5 5 transmitter timing 5 5 speed conversion 1 93 and AT SC 1 93 speed dependent auto reliable data transfer mode 1 94 SRCH RMT LL ADDR menu 2 41 figure 2 41 S Registers front panel options 1 14 status message 2 9 Status Summary Line 1 38 Status Option Sets Dialing menu figure 2 3 Status option sets dialing menu 2 3 stored numbers 3 10 Sync Idle option 2 18 synchronous bit oriented frame format 3 15 synchronous character oriented frame format 3 16 Index 11 S Continued synchronous data compression testing 4 5 Synchronizing message 1 32 SYNREL 1 35 system testing 4 4 T TELCO OPT S menu 2 23 figure 2 23 options with AT command equivalents 2 23 Telco option 1 24 telephone line type specifications for 5 2 telephone numbers deleting all from memory using AT amp F 1 22 using Reinit Memory option 1 22 dialing using the ATD command 1 10 using the Enter Then Dial option 1 10 entering 1 48 forbidden list 3 8 list of delayed 3 9 requesting listed numbers 3 9 stored and V 25 bis responses 3 10 viewing stored 1 78 TERMINAL OPT S menu 2 20 options with AT command equivalents 2 22 terminating remote configuration session 1 83 1 86 test indicator summary of 1 38 TEST OPT S menu 2 5 AT
110. ck type you can make the modem appear to be off hook to the central telephone office NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country amp L AT amp L Line Type v The AT amp L Line command sets the type of telephone line used by the modem If MODULATIONOPTS you change this option while the modem has a dial line connection the change does not take effect until you disconnect the line When the modem is configured for any one of the AT kRE option settings except 108 ACU or 116 ACU if a call fails the originating modem disconnects from the dial line and returns to the leased line unless the Auto Redial or Link Phone options are enabled Option AT Command Setting Setting Description Dial 0 The modem communicates over dial lines in dial 1 2 3 4D applications only 2W Lease 1 The modem communicates over a 2 wire leased line 4L The ACUs AT and V 25 bis are not functional when the modem is connected to a leased line 4W Lease 2 The modem communicates over a 4 wire leased line The ACUs AT and V 25 bis are not functional when the modem is connected to a leased line AT Commands 1 25 amp M AT amp M AT Data Format Cw The AT amp M AT Form command determines the format of data when the ACU svors Select option is set to AT NOTE To enable 326X FAST SDC
111. command equivalents 2 5 test option menu 2 5 testing automatic self test 4 2 4 3 Busy Out 4 18 data flow interruption during 4 4 general 4 4 LAL local analog loopback 4 5 LAL Pat local analog loopback pattern 4 8 LDL local digital loopback 4 16 local analog loopback See LAL loopback 4 4 quick checks before testing 4 2 RDL remote digital loopback 4 10 RDL Pat remote digital loopback pattern 4 12 retrain 4 19 synchronous data compression 4 5 Throughput status display 1 36 Index 12 T Continued throughput delay minimization 1 97 timing External 1 47 Internal 1 47 Loopback 1 47 Tone Length option 1 98 Tone option 1 102 transmit level 1 41 Transmit Throughput Status display 1 36 transmitter output level 5 5 timing 1 47 5 5 troubleshooting quick checks for 4 2 U unlocking password protection 1 81 procedure for 2 27 V V 21 specification for 5 4 V 21 modulation mode 1 74 V 22 specification for 5 3 V 22 bis specification for 5 3 V 22 bis modulation mode selecting 1 74 V 25 bis data format 2 17 V 25 bis ACU addressed mode 3 7 asynchronous frame formats 3 13 3 14 call establishment 3 6 call failure responses CFIAB 3 12 CFICB 3 12 CFIET 3 12 CFIFC 3 12 CFINS 3 12 CFINT 3 12 CFIRT 3 12 DLC 3 12 call progress responses 3 13 call progress responses using the V25 Resp option 3 12 V Continued V 25 bis ACU Continued commands general 3 7 connecting state 3 18 control signaling i
112. configuring for dial restoral 2 10 2 11 DA Default Dialing 1 55 DB Buffer Delay 1 56 DD Dial Wait 1 57 DI Leased to Dial 1 59 DL RTS CTS Delay 1 60 DP Pause Delay 1 60 DR and configuring for dial restoral 2 12 DR Auto Redial 1 61 DS Dial From 1 61 DS Dialing a Stored Telephone Number 1 10 DT DTR 1 61 EC Error Correction 1 62 FC Fast Call 1 63 FL Flow 1 64 LA DTE Ct 141 1 68 LC Line Compensation 1 68 LD DTE Ct 140 1 69 LE Dial to Leased 1 69 LN and configuring for dial restoral 2 11 LS Low Speed 1 71 LT DTE Pin 25 1 72 MD and configuring for dial restoral 2 11 MD PSTN 1 72 MF Modem Flow 1 74 MM Modulation Mode 1 74 MN Minimum Rate 1 76 MR DSR Control 1 29 1 76 MR DSR control 1 29 MS AT Msg 1 76 MX Maximum Rate 1 77 NC Network Compensation 1 78 OP Ext Select 1 79 OP External Option Set Select 1 79 OS Overspeed 1 80 PE Enable Disable Password Protection 1 80 PF Set Protection 1 80 PN Unlocking Password Protection 1 81 PT Dial 1 13 PT Dial Type 1 13 1 81 X X X X X X X X X Index 2 PW Password 1 82 RA Remote Access 1 82 RC Initiate Terminate or Abort Remote Configuration Session 1 83 RE and configuring for dial restoral 2 10 RE Restoral 1 87 1 88 RP Parity 1 90 RS RTS 1 91 RT and configuring for dial restoral 2 12 RT Retrain 1 92 SC Speed Conversion 1 93 SIL DTE Inactivity 1 93 SL Error Correction ID 1 94 SM 2 17 SR
113. connection in the V 32 modulation mode As soon as answer back tone ends if a V 32 tone has not been detected during ABT the modem attempts to negotiate a connection in the V 22 bis modulation mode The AT k BD Blind Dial command determines the time interval that the modem e e e waits before dialing Once the time interval has expired the modem dials It does not Blind Dial wait for a dial tone Option AT Command Setting Setting 2 0 4 1 S6 p Description The modem waits 2 seconds before dialing The modem waits 4 seconds before dialing The modem waits the amount of time specified by S Register 6 before dialing NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country 1 52 AT Commands BK CA AT BK Break Handling 7v N The AT BK Break command controls how the modem handles the break signal in the reliable and auto reliable data transfer modes During a Normal mode connection the modem handles breaks as standard regardless of this option setting During a Reliable Auto Reliable or Speed Auto Reliable connection breaks are handled according to the option setting of the modem where the break originated Break signals are sent to the DTE for a duration of one second Option AT Command Setting Setting Description Destruct 0 The modem uses destructive and expedi
114. ct response data field 3 32 framing rules 3 27 information field format and command 3 23 information field format and response 3 25 link problem determination 3 22 message format 3 23 responses 3 23 LPDA2 command command code 3 24 data field 3 24 header 3 24 identifier 3 24 modem address 3 24 LPDA2 response data field 3 26 header 3 25 identifier field 3 25 LSN response V 25 bis 3 11 manual answering 1 49 procedure 3 21 using the V 25 bis ACU 3 21 manual dialing 2 33 using the V 25 bis ACU 3 21 Max Rate option 1 77 maximum rate 1 77 memory Index 8 M Continued memory reinitializing 1 22 message format for LPDA2 3 23 messages Bad LAL 1 32 Busy Out 1 32 call progress 1 14 Callbk Wait 1 32 Data 1 32 Dial Wait 1 32 Dialing 1 32 Disc Tx Wait 1 32 Disc Wait 1 32 Disc Rx Wait 1 32 Disconnect 1 32 during self test 4 3 LAL 1 32 LAL Training 1 32 Link Wait 1 32 NO CARRIER 1 16 NO DIALTONE 1 17 Off Hook 1 32 Ranging 1 32 Redial Wait 1 32 Retraining 1 32 status 2 9 Synchronizing 1 32 Test 1 32 Tone Detect 1 32 Training 1 32 WAIT 1 32 MI MIC and Bell 801C auto call unit 3 33 and Codex 2207 auto call unit 3 33 Microcom Networking Protocol See MNP Minimum Rate option 1 76 MNP and Reliable mode 4 15 error correction 1 62 Mode answer originate option 1 53 Mode data transfer option 1 94 Mode option 1 74 modem automatic answer 1 49 configuring for callback 2 31 locating serial number 2 44 locking 1 80 man
115. d secondary channel i e network management and remote configuration are not available V 22 bis modulation mode is used Bell 212 modulation mode is used Bell 103 modulation mode is used V 2 modulation mode is used l Default in 326XFAST 326XFAST SDC Product 2 Default in V 32 bis Product AT Commands 1 75 gt MN k MB amp S MS AT MN Minimum Rate MODULATIONOPTS J pee AT MR AT amp S DSR Control The ATXMN Min Rate command sets the minimum rate at which the modems communicate Settings vary depending on the modulation mode you choose but some of the following speeds are available 326X V 32 bis Modem 300 all 1200 2400 4800 7200 9600 12 0 14 4 Option Setting AT 326XFAST 326XFAST Command Minimum Modem SDC Modem _ Setting Modulation Rate bps Modem 300 all 1200 2400 4800 7200 9600 12 0 14 4 16 8 19 2 21 6 24 0 300 1 1200 2400 4800 7200 9600 2 3 4L 12 0 14 4 16 8 19 2 21 6 24 0 0 300 1200 2400 4800 7200 9600 Un WN 6 12 000 7 14 400 8 16 800 9 19 200 10 21 600 11 24 000 NOTE When the C Fast Auto modulation mode is selected the 326X Series Modem negotiates data rates from 300 to 24 000 bps When the C Fast Only modulation mode is selected the modem negotiates data rates from 9600 to 24 000 bps AT MS AT Messages See the AT amp S command description Cw Com 1 76 AT Commands The AT k MS A
116. d link Enable the terminal flow control when operating in reliable mode If the modem negotiates a connection in the V 21 or Bell 103 modulation mode it terminates the call If operating with 326XFAST Synchronous Data Compression enabled in both the local and remote modems once the local modem connects with the remote modem it attempts to establish an error corrected link In SDC mode the setting of Data Compression AT7K DC and Error Correction AT EC options are ignored a connection is attempted using V 42 bis data compression and LAPM error correction The local modem establishes a synchronous Reliable connection or disconnects if it cannot establish an error corrected link During Reliable data mode the modem uses speed conversion if enabled Enable the terminal flow control when operating in reliable mode If the modem negotiates a connection in the V 21 or Bell 103 modulation mode it terminates the call AT Commands 1 95 SM SR Auto Rel Auto Rel Auto Rel 3 Auto Reliable Once the local modem connects 1 4D 1 4D 1 2 3 AL with the remote modem it attempts to establish an error corrected link During Auto Reliable data mode the modem uses speed conversion if enabled This allows the modem to automatically accommodate DTEs of different speeds The modem reverts to Normal mode if it cannot establish an error corrected link In 326XFAST SDC mode with the Auto Rel selection the modem reverts to Direct mod
117. dem behaves as if flow control were disabled DTR CTS 2 In asynchronous applications the local modem and DTE use DTR CTS signals to operate flow control The terminal uses DTR and the modem uses CTS to signal when the buffers are full An on to off transition signals the transmitting device to stop sending data an off to on transition signals that data can flow This setting overrides the CTS option setting when the modem is in Normal or Reliable mode If you plan to use DTR CTS flow control set the AT amp D DTR under the TERMINAL OPT S menu command to High In applications operating in 326X FAST synchronous data compression mode DTR CTS flow control functions the same as asynchronous applications with the following exception flow control is unidirectional from the local modem to the DTE through the CTS signal the modem uses CTS to signal when the buffers are full The DTR signal has no impact on flow control in synchronous applications 1 64 AT Commands RTS CTS XON XOFF PT TxCIk 2 3 4L 3 4 X FL In asynchronous applications the local modem and DTE use RTS CTS signals to operate flow control The terminal uses RTS to signal when its buffers are full The modem uses CTS to signal when its buffers are full An on to off transition signals the transmitting device to stop sending data an off to on transition signals that data can flow This setting overrides the AT amp R or AT KCT CTS command when the modem
118. dem nest card or B if it is Modem B on the dual modem nest card Select No if the remote modem is a standalone modem or a single modem nest card A failed search for a remote modem s address can be caused by the following The remote modem s Rmt Acc option is set to Disabled The remote modem is running a test 2 42 Remote Configuration Options Remote Configuration Options Setting or Searching for a Remote Modem s Leased Line Address Before you can use the SET RMT LL ADDR and SRCH RMT LL ADDR functions you must know the remote modem s serial number A 326X Series Modem serial number can be located three ways Use the front panel Status display Read the serial number label on the underside of the modem Use the AT KSTO command ATxSTO Command At the remote modem enter AT kST0 lt CR gt The Front Panel At the remote modem display the Status Option Sets Dialing menu Scroll through the status information until you see Display Modem ID Press Use wr to scroll through the ID numbers until you see Vv g y Serial xxxxxxx On dual modem nest cards the serial number will have an A or B For example the modem will display Serial xxxxxxxA or Serial xxxxxxxB Remote Configuration Options 2 43 Remote Configuration Options Modem s Serial Number As Figure 2 16 illustrates the 326X Series Modem serial number is located on the label attached to the modem s underside Locate this label
119. describes how the DTR signal behaves when the Restore option is set to FP Only FP 116 or FP Auto When DTR 108 1 108 2 Tail Reset or Discon the following DTR signal behavior applies On the leased line on to off DTR signal transitions have no effect Off to on DTR transitions have no effect on connection or disconnection but they do control whether the modem answers or initiates a call see Table 2 1 On the dial line in restoral on to off DTR signal transitions cause the modem to drop the dial line and return to the leased line Off to on DTR transitions have no effect on connection or disconnection but they do control whether the modem answers or initiates a call see Table 2 1 When DTR High or Esc the DTR signal has no effect on modem behavior except for answering and initiating calls see Table 2 1 When Restore FP 108 1 or FP 108 ACU the setting of the DTR option has no effect on modem behavior except for answering and initiating calls see Table 2 1 Table 2 1 DTR Cross Reference DTE Signal DTR Option Setting Initiate Answer ON High Yes Yes OFF High Yes Yes ON 108 1 Yes Yes OFF 108 1 No No ON 108 2 Yes Yes OFF 108 2 No No ON Tail Yes Yes OFF Tail No Yes ON Reset Yes Yes OFF Reset Yes Yes ON Disc Yes Yes OFF Disc Yes No ON Esc Yes Yes OFF Esc Yes Yes Restoral Options 2 13 Error Correction and Data Compression Options Error Correction and Data Compression Options Figure 2
120. digit or character appears in the leftmost position of the display Example 1xxxxx 4 Press p The display shifts one position to the left and the second character position is displayed 5 Repeat Steps 3 and 4 until you have completed keying in the numeric entry If you make a mistake and you wish to reenter a number or character press W This will place the cursor at the beginning of the line You may now re enter the number or character 6 After you have input the correct numbers or characters press 8 to save your selection Performing Numeric Entry 2 45 Chapter 3 Automatic Calling Interfaces Contents MBI RGA eres si a cine he Um 3 3 begun 3 3 Call Establishment Methods sec eese ciae ecireste rniii nE iA EC cut eb 3 6 Modem sepas ro T 3 6 rof ME 3 7 V23 pis COmMANdS Ee 3 7 Nai MS RESPONSES a oce eerie a EIEN NER A Rl REBANE 3 10 Call Failure Responses uestre Ebr reap esten a aries 3 11 Cul Progress Responses Laseoseios dr bx uce ni eot oin Led dU obest eran agus 3 12 Result Code Responses wis uae e epe tete Axa b bles ite arna 3 12 Reliable Connection Response sc nione remote s eto scence Pul nep va 3 13 Programming Guide for the V 25 bis Auto Call Unit ACU 3 13 Asynchronous Frame Pomnalt sac aec mir adie Aan 3 14 Synchronous Bit Oriented Frame Format ees 3 15 Synchronous Character Oriented Frame Format
121. displays RC FAILED or RC DENIED AT Commands 1 83 x RC The Front Panel To initiate a remote configuration session with a dial modem use your front panel to 1 Establish a dial line connection with the remote modem at 7200 bps or greater 2 Press W to move to the home position on the front panel menu tree 3 Press wr until the RMT CONFIG OPT S menu appears 4 Press to display Init Rmt Cnfg 5 Press The modem displays Initiating RC If successful the modem displays RC Established If unsuccessful the modem displays RC Failed or RC Denied Failure to establish a remote configuration session can be caused by the following The remote modem s AT RA Rmt Acc command is set to Disabled The remote modem is running a test You have already established a remote configuration session with the remote modem but via a different means For example you have already established a remote configuration session using your AT ACU and you are now trying to use your front panel to do the same thing 1 84 AT Commands 4x RC Initiating a Remote Configuration Session with a Leased Line Modem The leased line remote configuration function makes use of the SET RMT LL ADDR and SRCH RMT LL ADDR menus Before beginning a remote configuration session with a leased line modem you must know the remote modem s address If you have not yet assigned the remote modem an address or cannot find its address see the
122. e 326X Series Modem User s Guide for information about making connections to your modem DTE and phone line Refer also to Chapter 3 Getting Started and Chapter 4 Configuring Your Modem in the 326X Series Modem User s Guide for information about proper modem configuration Automatic Self Test Whenever you apply power to the 326X Series Modem it automatically runs a self test that checks for and identifies any faults in the modem s circuitry 4 2 Testing Your Modem Starting the Automatic Self Test To start a modem self test do the following 1 At the modem s rear panel turn on the power switch If the power switch is already on turn the power off and then on again 2 Observe the front panel LCD display to see which of the messages shown in Table 4 1 appears after this message SELF TEST Table 4 1 Self Test Messages Self Test Message Description 3260 3265 If this is the first time you are powering up your 326X Series Modem this Initial message appears in the display immediately after the message SELF TEST The 3260 3265 Initial message indicates that the modem is set to operate using factory default values 3260 3265 If this is not the first time you are powering up your 326X Series Modem Ready this message appears in the display immediately after the message SELF TEST The 3260 3265 Ready message indicates that no faults were encountered during the self test and that the modem is ready for operation E
123. e call 2 A Disconnect command instructing the modem to drop the switched network data connection 3 22 Automatic Calling Interfaces LPDA2 Message Format The commands and responses between the modem and the DTE use synchronous data link control SDLC nonsequenced information frames The format of these frames is as follows lt Information Field gt F The following explains the LPDA2 responses Responses Definition Flag Ox7E Binary number 01111110 Address and Control OxFD1B Binary number 1111110100011011 neglecting zero bit insertion These two bytes signify that the command is an LPDA2 command You should check the message for validity and execute accordingly FCS Frame Check 16 bit cyclic redundancy check based on the polynomial x16 Sequence XU 4 Xx xl Information Field Format and Command The command information field contains the following Command Definition H Header 8 bytes I Identifier 2 bytes A Modem Address 2 bytes C Command Code 1 byte D Data Field Optional The length of this field is command dependent NOTE Fields specified as not used are not checked by the modem and may contain any data pattern Automatic Calling Interfaces 3 23 Header H The following is an example of the byte field 0x0510420821841042 This byte field is required to identify the SDLC frame as an LPDA2 command Identifier I The identifier is two bytes long and structured as foll
124. e disconnect 76 Retraining time exceeded 77 Remote Access Reset Test Indicator The number displayed after TI tells you which test is in progress The numbers correspond to the following messages 0 No Test End Test 1 Local Digital Loopback Test 2 Remote Digital Loopback Test 3 Local Analog Loopback Test 4 Reserved 5 Busy Out 6 Local Analog Loopback Pattern Test 7 Remote Digital Loopback Pattern Test 8 Pattern Test 9 Retrain Answer Originate A Modem is in Answer mode O Modem is in Originate mode Dial Leased D Modem is using a dial telephone line L Modem is using a leased telephone line amp V xST Display Modem ID This display enables you to determine your unit s current revision of software To display the software revision level 1 Step across the Status Option Sets Dialing Menu by pressing until you reach the Operating Status Display A typical Operating Status display is DTE 19 2 RELIABL 2 Press yw until you see Display Modem ID 3 Press The modem displays SWPart xxxxxxxx 4 The rightmost two digits indicate the software revision level Alternately you can enter AT amp IO from the control terminal The terminal displays the 8 digit software part number XXXXXXXX the software revision number is indicated by the rightmost two digits CQMS Parameter Status Pressing W then twice from the Status Summary Line displays CQMS Parameter Status Pressin
125. e if it cannot establish an error corrected link Enable terminal flow control when operating in the Auto Reliable mode If the local modem negotiates a connection in the V 21 or Bell 103 modulation mode Normal mode is used in asynchronous applications Direct mode is used in synchronous applications Spd AutoRel Spd AutoRel SpdAutoRel 4 Speed Dependent Auto Reliable Once the local modem connects with the remote modem it attempts to establish an error corrected link If a connection is established at 1200 bps or less Normal mode is used in asynchronous applications Direct mode is used in synchronous applications During data mode the Speed Dependent Auto Reliable mode uses speed conversion if enabled This allows the modem to automatically accommodate DTEs of different speeds Enable terminal flow control when operating in the Auto Reliable mode Default with the 326XFAST SDC Modem AT SR RTS DCD Remote Signaling The AT SR RemRTS DCD command allows for two types of PN signaling It is rco valid only when the RTS or DCD option is set to Remote RemRST DCD Option AT Command Setting Setting Description Codex AT KSRO The Codex option setting allows you to configure all the modem for proprietary signaling V 13 AT KSRI This setting allows signaling that is compliant with CCITT V 13 for synchronous applications only 1 96 AT Commands AST amp V TD AT ST AT amp V Modem Status Display Se
126. e maximum possible DCE data rate to 19 200 bps When operating in an environment where the conditions described for Lvl1 and Lvl2 exist Lv12 is recommended to enhance performance AT ND View Stored Telephone Numbers DATA 9600 T D P View Phone 1 78 AT Commands The AT END View Phone command displays the telephone numbers stored in the modem s nine telephone book addresses The AT ND Command To view the telephone numbers stored in your modem s memory enter AT END CR The Front Panel Select the address you want displayed at View Phone See the Performing Numeric Entry section in Chapter 2 for details on how to use numeric entry AT OC External Control OC OP The AT kOC Ext Cntrl command chooses which pin the AT OP Ext Select Erma ors p e e e command responds to NOTE If the AT OP is set to 0 this command has no effect Ext Cntrl Option Setting Pin 14 all Pin 20 AT Command Setting 0 Description The Ext Select option loads an option set based upon the transition of Pin 14 This setting overrides the ATRE Restore command setting FP 116 or FP 116 ACU The Ext Select option loads an option set based upon the transition of Pin 20 When using this setting set the AT amp D DTR command to High This setting overrides the AT K RE Restore command settings FP 108 1 and FP 108 ACU and all AT amp D DTR command settings except High AT OP External Option Set S
127. e modem DTR Option Setting 326X V 32 326XFAST 326XFAST AT Command bis Modem Modem SDC Modem Setting High 1 4L High l 4L High 1 4L O0 Escape Escape Escape 1 Discon 4D Discon 4D Discon 2 Reset Reset Reset 3 1 20 AT Commands Description The modem ignores DTR from the DTE The modem reads DTR as always high Use this setting if the DTE does not provide DTR or if you plan to use DTR CTS flow control with the error correction feature When ACU Select AT and AT Fortbm Async AT amp M the modem enters the AT escape mode when an on to off DTR transition is detected while modem is in data or test mode The modem hangs up and enters command mode when an on to off DTR transition is detected while the modem is in data test or escape mode If DTR is low the modem does not auto answer This setting is similar to Discon except that an on to off DTR transition also causes the modem to reinitialize its memory the equivalent of executing the ATZ command If DTR is low the modem auto answers The option set to which the modem resets is determined by AT amp Y Power Up In option If the AT amp Y Power Up In command is set for 1 2 3 or 4 the designated option set is loaded If Old is selected the currently selected option set is reloaded If DTR is dropped during a test such as RDL LAL LDL RDL Pattern etc the modem disconnects from the line and resets memory to the selected option set NOTE A
128. e operating in C Fast modulation modes the 326X Series Modem may require a longer training sequence AP AS If you choose to operate the 326X Series Modem in the C Fast modulation mode with the ARS option AT AP disabled the modem may not depending on line conditions retrain at the maximum data rate If the line probe feature selects a baud rate that cannot support the maximum data rate the modem will retrain and establish the connection at the maximum data rate allowable by the baud rate that the line probe feature selected NOTE When external timing is selected configure the modem so that the minimum rate is equal to the maximum rate This will force the selection of the data rate to the rate you selected Option AT Command Setting Setting Description On 1 The modem continuously monitors the signal all quality of the telephone line and negotiates the highest possible rate within one of the following modulation modes C Fast V 32 bis V 32 or V 22 bis You must enable the AT K RT Retrain command if you plan to use the adaptive rate setting Close rear panel Switch 1 down so that the modem can inform the terminal of rate changes see Table 2 2 Rear Panel Switches in Chapter 2 Installing Your Modem in the 326X Series Modem User s Guide Off 0 The modem does not use the adaptive rate feature AT AS Answer in Restoral v RESTORAL OPT S The AT AS Ans Rest command controls whether the modem answe
129. e option to match the speed of your network manager This setting controls the speed of the NC ports on your modem s rear panel Option Setting Network Control Port Configured for 75 75 bps default 110 110 bps 150 150 bps 1200 1200 bps 2400 2400 bps 4800 4800 bps 9600 9600 bps Pass Thru The 326X Series Modem uses an in band secondary channel to pass network management data to the remote modem This channel is not disruptive to main channel user data The Pass Thru option controls the manner in which the network control data is passed to the remote modem when the 326X Series Modem is configured as a DIAL modem It also determines if the DIAL remote modem passes the network management in band secondary channel data through to its network control NC port out jack The out jack is located on the rear panel of the modem Use the Pass Thru option when you have configured the modem for network management data to be passed to second tier devices Option Setting Description opt 1 The local modem connected to a network manager through the NC default port will not forward all network management data received from the NC port to the remote modem over the in band secondary channel Only commands from the network manager designated for the remote modem are passed through to the in band secondary channel Only responses from the remote modem are passed through to the NC port for the network manager The remote modem does not pass network ma
130. e the AT amp V command description AT TD Throughput Delay Minimization F The AT TD Throughput Delay Minimization command allows you to improve the Erma orrs p e e o modem s performance while operating in 326XFAST Synchronous Data Compression mode by minimizing delays during data transmission This feature when enabled allows the remote modem to begin transmitting synchronous data to its DTE before an entire frame of data has been received from the local modem This option applies only when the modem is operating in 326XFAST SDC mode Option Setting Rx Clock 2 3 4L RxD Dly Off AT Command Setting 1 Description With this setting the remote modem uses its internal Rx Clock to control the flow of data from the modem to the DTE preventing a loss of synchronization during data transmission This setting allows the remote modem to begin transmitting data before an end of frame has been received from the local modem If the rate of data transmission slows the clock stops temporarily ceasing the flow of data Motorola recommends that the Rx Clock setting be used in most applications NOTE This setting is operational only when Clock Internal AT amp X With this setting the remote modem continuously monitors and adjusts line traffic to estimate based on time when to transmit data to the DTE The modem calculates a delay time based on variables such as frame size DTE rate DCE rate and data compress
131. ection link retransmission limit 40 Error correction link remote requested 41 Error correction link no valid packet received 42 Error correction link establishment error 43 Error correction link accept or timeout 44 Error correction link negotiation failure 45 Error correction link protocol violation 46 Error correction link bad parameter 47 Error correction link data compression error 48 FSK and reliable data modes not valid 49 Restoral DTR 50 Restoral Circuit 116 51 Restoral Auto 52 Restoral Answer 53 Restoral Talk Data 54 End Restoral Talk Data 55 End Restoral Dial to Lease Timeout 56 Lease Line Test 57 Lease Line Test Manager 58 Lease Line Test Failed 59 External Option Set selected 60 Option Set selected ATZ AT Commands 1 39 amp V ST 1 40 AT Commands Table 1 3 Status Summary Line Continued Message Definition TI Aor O DorL 61 Lease Line Test Passed 62 Security No Callback Number provided 63 Security Failure Manager timeout 64 Security Failure Invalid Callback Number 65 Security Failure Interdigit timeout 66 DTE Inactive 67 Restoral ACU 68 End Restoral ACU 69 Restoral DTR ACU 70 End Restoral DTR ACU 71 Restoral ACU 116 72 End Restoral ACU 116 73 LPDA2 Disconnect 74 Remote disconnected without sending PSTN 75 Configuration change caus
132. elect The AT KOP Ext Select also known as 116 Select command controls how the CX Terminal orrs p e modem uses an external pin to select option sets The pin used is defined by the ATXOC Ext Cntrl command NOTE Upon power up if the modem is configured for Power Up In Old it reads the AT kOC Ext Control option and sets the option set accordingly Option Setting Off all nH mL AT Command Setting 0 1 12 where 1 1H 2L 2 1H 3L 3 1H 4L 4 2H 1L 5 2H 3L 6 2H 4L 7 3H 1L 8 3H 2L 9 3H 4L 10 4H 1L 11 4H 2L 12 4H 3L Description The AT XOP Ext Select command is disabled There are 12 settings with the format nH mL where n 1 2 3 or 4 and m 1 2 3 or 4 When the pin specified by the Ext Cntrl option Pin 14 or Pin 20 transitions from low to high the modem loads the H option set When the pin specified by the Ext Cntrl option Pin 14 or Pin 20 transitions from high to low the modem loads the L option set For example if you set Ext Select 1H 2L and the pin specified by the Ext Cntrl option Pin 14 or Pin 20 transitions from low to high the modem loads Option Set 1 If the pin specified by the Ext Cntrl option Pin 14 or Pin 20 transitions from high to low the modem loads Option Set 2 When an option set is loaded due to the pin specified by the Ext Cntrl option Pin 14 or Pin 20 transition the modem disconnects from the line AT Commands 1 79
133. eliable Auto Reliable or Speed Auto Reliable using the Mode AT SM option Option Setting Description Async Asynchronous data is passed in data mode 1 4D Sync Synchronous data is passed in data mode 2 3 4L ACU Options 2 17 ACU Options Character Length The Char Length option applies to asynchronous data applications that use the direct data transfer mode no error correction The modem ignores this option if you use the normal reliable or auto reliable data transfer modes The AT and V 25 bis auto call units ACUs use 10 bit characters only The 10 bit character format does not affect the character length selection Do not change this option unless your application requires it If you must change this option select the setting that corresponds to the number of bits that your DTE uses to code each character start bit data bits parity bit and stop bit NOTE The autobauding feature works only with 10 bit characters Option Setting Description 8 Modem is compatible with 8 bit characters 9 Modem is compatible with 9 bit characters 10 Modem is compatible with 10 bit characters all 11 Modem is compatible with 11 bit characters V 25 bis Character Selection The V25 Char option determines the type of character that the V 25 bis ACU uses Option Setting Description ASCII The V 25 bis ACU uses ASCII character format all EBCDIC The V 25 bis ACU uses EBCDIC character format Sync Idle 2
134. em via the AT Remote Config command If this command is issued at any other time an ERROR response is returned to the DTE and the setting of the parity strap remains unchanged AT Command Option Setting Setting Description V 25 0 Sets parity according to V 25 bis specifications all The following parity applies Parity is a Space for bit synchronous protocol A zero is added to each 7 bit character in the message field Parity is odd for character synchronous protocol A one or zero is added to each 7 bit character making the total number of one bits equal to an odd number Parity is even for asynchronous data format A one or zero is added to each 7 bit character making the total number of one bits equal an even number Even 1 Parity is even A one or zero is added to each 7 bit character making the total number of one bits equal an even number Odd 2 Parity is odd A one or zero is added to each 7 bit character making the total number of one bits equal an odd number Mark 3 Parity is a Mark A one is added to each 7 bit character Space 4 Parity is a Space A zero is added to each 7 bit character no parity 1 90 AT Commands AT RS RTS Control RS v Ep RTS The AT kRS RTS command determines how the modem interprets the RTS signal The DTE signals the modem with the RTS on EIA TIA 232 D Pin 4 V 24 Circuit 105 AT Command Option Setting Setting Normal 0 2 3 4 High 1 1 Remote 2 Descri
135. entioned in the System Testing section above are supported while in the 326X FAST SDC mode When initiating the following on line tests remote digital loopback remote digital loopback pattern data mode pattern local digital loopback during a 326XFAST SDC connection the modem falls back to Direct mode Mode Direct AT SM in order to run the test If the modem is set for internal timing Clock Internal AT amp X the DTE clock will be changed to match the DCE rate If the modem is set for external timing Clock External AT amp X the clock rate provided may not match the DCE rate and the test will not function Set Clock Internal temporarily to complete testing and then reset to External To accurately test the integrity of the synchronous data path while running loopback tests set the modem for one of the asynchronous buffered modes ModezNormal Reliable Auto Reliable or Speed Auto Reliable Local Analog Loopback Test AT amp T1 The local analog loopback LAL test is an offline test that conforms to the CCITT V 54 specification The test examines the local modem s transmit and receive circuitry by looping local DTE data from the modem s transmitter to its receiver see Figure 4 1 If the local modem is connected to a remote modem during an LAL test initiating the LAL test causes the local modem to disconnect During an LAL test you can make your modem appear busy or not busy to calling modems
136. enu appears whenever a new branch of the main menu is described A list of the menu s front panel options if any that have AT equivalent control terminal commands Descriptions of the menu s front panel options that do not have AT equivalent commands For an explanation of how to enter and use AT commands see Chapter 5 Using the AT ACU in the 326X Series Modem User s Guide Appendix A of the user s guide contains a cross referenced list of AT commands with front panel options Status Option Sets Dialing Menu Status Option Sets Dialing Menu The top menu shown in Figure 2 1 is used for displaying modem status information using option sets and dialing Data DCE Rate T D Tm Pressing this displa y toggles modem li betw een talk data states v TEST OPT S TE Rate EC Mode Mode DC Mode C S 0 R Kb 0 Kb 0 M NN Dm mw Epp Hp B TI00D Displa y Modem ID s w re v lvl r Ec a se itter 1dg Offset 0Hz vel Odbm e vel odbm ains 0 Dela y 0ms cho Lvi 0 ho Lvl 0 e Roll 0 r SNR 0dB SQ 0 EP 0 I AT amp E ReinitMemor y gt Select Options P ow er Up In Old AT DS ATDS I Dial F rom 1 v n Cw 3 AT ND Vie w Phone 1 L4 v n v 9 Enter Phone 1 Mu axa I gt ATELN IP ato I gt AT XDR Po as I A uto Redial Off Link Phone 1 v v n n v v 3 9 KEY Count y Spec
137. er the access security password 4 To delineate the password from the callback number enter the code This alerts the answer modem that the password is complete but the dial string is not yet finished 5 Enter the callback number 6 Include the code 0 in the string telling the answer modem that password entry is complete NOTE The password will not be accepted and the call will be disconnected if the O code is not at the end of the dial string NOTES 1 If your modem is using its AT ACU and you follow the x0 with H a semicolon followed immediately by a capital H the semicolon causes the originating modem to enter the command state and the capital H causes the modem to hang up upon completion of the call 2 If you are using the V 25 bis ACU an NMS or the front panel you must enter the both the semicolon and capital H together H to disconnect the call In both instances note that the originating modem must be placed on hook in order to be called back For any dial modifiers used in the callback number you must use the DTMF equivalencies provided in Table 2 2 2 32 Access Security Options Access Security Options Using the Callback Feature with an Originate Only Modem If your modem can only originate calls and you want to call a 326X Series Modem that is using the callback feature your callback number must contain the S5 dial modifier the DTMF equivalent of the R modifier at the end When t
138. erate when nonstandard call progress signals or noise signals are found during the connection process For example if the modem interprets a ringback tone as a busy signal the call attempt will terminate incorrectly This modifier instructs the modem to monitor the telephone line for only the dial tone and the ringback tone during the remainder of the call This modifier overrides the setting of the Call Progress ATX option The dial digits following the X up to the next T are to be dialed using pulse dialing The dial digits following the T up to the next X are to be dialed using tone dialing This represents the dial digit because this digit cannot be packed into four bits This represents the dial digit gt because this digit cannot be packed into four bits The two bytes immediately following the U contain the call timeout value in seconds The timeout period is specified by the digits 0 through 9 packed two digits per byte Only the three rightmost digits of the two bytes contain the timeout value The first digit of the first byte is ignored If a call timeout is not specified in the command or if the value specified is 0 the modem uses the default call timeout value The maximum value of the U modifier is the value configured in the Call Timeout AT K TT option If the Call Timeout option is set for S Register 7 the maximum value of the U modifier is 255 For example the string 0xE40060 sets the call timeout to 60 seconds each charac
139. erify command determines whether the access security feature is enabled If access security is enabled this option selects the method used to verify a password AT Command Option Setting Setting Dis 0 all Intern 1 Mngr Only accessible using a network management system Description Password and callback features are disabled A single password stored in modem memory is checked against the received password This password is stored in modem memory using the ATZI Enter Group PW command The network management system verifies the received password Although displayed at the modem this selection is not accessible by the front panel or AT ACU AT Commands 1 103 Chapter 2 Front Panel Operation Contents Bait du ONE cucine iude dbucbetuDur kata aa ira ee ou och Du a Ep usu pi events 2 2 Status Option Sets Dialing Ment 1er tret neret Eri 2 3 TDS JDRTORIS sacer I Verner bed nat ES E E dini FO A PEDRO bn cand 2 5 Modulation OpHONE M 2 6 Restoral CODIOUS ius idee npe eu be ooa cba ecu Paper on beg aiu FE RR E ap deae 2 8 Restoral Indications 4a rdi ero eR bI epe IER a 2 9 Configuring for Dial Restoral 1 ue cie eris ED en etta ts Cocaunsscesniaccermer tation 2 10 Interpreting the DTR Option Setting terree trn Pee naspas 2 13 Error Correction and Data Compression Options eene 2 14 ACU ODUOBS 5 curri per IE HERE bti a e cep NIE RU RE 2 15 JA Selebstiolk 25s certo S e
140. es a local analog loopback pattern test Initiates a remote digital loopback pattern test Makes the modem appear busy to incoming calls To configure the modem to use the Busy Out feature refer to AT k LT DTE Pion 25 option description in this chapter If Busy Out is enabled ATHO will disconnect the busy out condition If the modem is in escape mode the modem has transitioned to command state from the data state online or test the ATHO command disconnects the modem Selecting End Test will also disconnect the busy out condition Initiates a retrain with the remote modem NOTES 1 For maximum reliability run the RDL LDL and RDL Pat tests at a data rate of 19 2 kbps or lower 2 These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country 3 When operating in the 326XFAST SDC mode the modem fallsback to Direct mode Mode Direct to run on line loopback tests Refer to 326XFAST Synchronous Data Compression Testing in Chapter 4 Testing Your Modem for additional information amp T4 amp TS amp V ST AT amp T4 AT amp T5 Accept RDL v Cepe The AT amp T4 and AT amp T5 Accept RDL commands control whether the local modem can be placed in a remote digital loopback test by a remote modem Option Setting On all Off AT Command Setting Description 4 The local modem can be p
141. es not accept any commands unless the call fails or you disconnect the call If the call fails the modem raises Circuit 106 CTS and enters dialog state Figure 3 7 illustrates the signaling for the connecting state DSR 107 Off DTR 108 2 On CTS 106 Off DCD 109 Off 3260 Executing the ae n Command Figure 3 7 Connecting State 3 18 Automatic Calling Interfaces Data State When a connection is successful the modem enters data state At this time the modem turns on Circuits 107 DSR and 109 DCD inbound data is accepted from the remote site When the local DTE turns Circuit 105 RTS on the modem turns Circuit 106 CTS on and outbound data transmission takes place as shown in Figure 3 8 below 107 109 On 4 DTR 108 2 On Data Inbound DSR 107 On RTS 105 On DCD 109 On When Received CTS 106 On To Remote LLP 3260 j Data Outbound guy Figure 3 8 Data State Disconnecting If the remote modem disconnects the local modem drops the connection and enters dialog state If the DTR option in the local modem is set to 108 2 dropping DTR at the local DTE disconnects the call Automatic Calling Interfaces 3 19 Direct Mode To use the direct mode set the DTR option of the front panel display to 108 1 Setting the DTR option in the modem to 108 1 allows DTR signal transitions from the DTE to control connection to the dial line In direct mode the modem doe
142. esting Your Modem or the AT amp T option description within this chapter for a description of how to initiate a retrain AT Command Option Setting Setting 0 Retrain 1 1 12 AT Commands Description Return to data mode Allows you to initiate a retrain with the remote modem ATP ATT AT PT Dial Type P T PT Q v uei The ATP ATT and AT PT Dial commands determine how the modem dials telephone numbers in tone pulse or auto tone pulse The modem refers to this option setting if it does not encounter any T or P modifiers in the telephone number AT Command Option Setting Setting Tone ATT AT PTO Pulse ATP ATKPT1 Auto ATKPT2 ATQ Result Codes Description The modem uses tone DTMF dialing unless otherwise specified by the T or P dial modifiers in a telephone number The modem uses pulse dialing unless otherwise specified by the T or P dial modifiers in a telephone number The auto call unit attempts to tone dial when initiating a call If tone dialing is not possible pulse dialing is used For this feature to work correctly the first character in a dial string must be a digit and not a dial modifier A T or P in the dial string overrides this setting for that dial string NOTE Do not use the Auto setting if you are in a PBX environment If a dial tone is detected after the first digit the phone number will be redialed as a pulse which may not be recognizable by the PBX v Co
143. etrain request due to poor signal quality to attempt to relearn the channel or fallback in data rate by enabling ARS if necessary A retrain is counted if it is initiated locally or remotely i e both the local and remote 326X Series retrain counters are incremented Note that the retrain counter for automatic restoral operation is a separate undisplayed counter The restoral retrain counter is a moving window based on the settings of the Leased to Dial option Echo Delay Measured in milliseconds from 1 to 9999 ms this is the far end echo round trip delay time This value is displayed only when the C Fast V 32 bis or V 32 modulation mode is being used Otherwise the displayed value is zero Echo delay displays how far away in time the far end echo is i e the round trip delay of the physical link layer AT Commands 1 43 amp V xST Table 1 4 CQMS Parameters Continued Front Panel Display Far Echo Lvl Nr Echo Lvl Phase Roll Eqlzr SNR SQ EP Description Measured in decibels from 6 to 72 dBm this is the strength of the echo signal generated between the local modem and the remote modem CO connection This value is displayed only when the C Fast V 32 bis or V 32 modulation mode is being used Otherwise the displayed value is zero NOTE If the far end echo level is 35 dB below its receive level the Phase Roll COMS parameter has no meaning Measured in decibels from 6 to 72 dBm this is
144. figuration session to be possible Make certain that your MODULATION OPT S menu Mod Max Rate and Min Rate options are set to accommodate at least 7200 bps For fastest remote configuration channel speed modem to modem speed should be 7200 bps Higher modem to modem speeds do not improve your remote configuration channel speed Caution When your 326X Series Modem is being controlled by another 326X Series Modem if you enter the AT escape sequence at your control terminal your terminal displays UNDER RMT CONFIG and you enter the AT command node Once in AT command mode you will not be able to issue AT commands or return from the AT command mode to other terminal displays until the remote configuration session is over NOTE It is advised that you not enter the AT escape sequence while your modem is under remote configuration control Remote Configuration Options 2 39 Remote Configuration Options Setting a Remote Modem s Leased Line Address The SET RMT LL ADDR menu Figure 2 14 is intended for use with remote configuration on leased lines Using the SET RMT LL ADDR option you can set the remote modem s address NOTE If you attempt to search for and set a remote modem s leased line address and the remote 326X Series Modem has Release 4 0 or earlier software you cannot set the remote modem s serial number from the local unit You must know the serial number to configure it from the local unit or have someone a
145. for the modulation mode selected Option AT Command Setting Setting Description C Fast Auto 10 The modem negotiates the highest common all connection in one of the following modulation modes C Fast V 32 bis V 32 V 22 bis Bell 212 V 21 or Bell 103 depending on the setting of the Low Speed option NOTE This selection does not appear if you have the 326X V 32 bis Series Modem C Fast Only 11 The modem negotiates the highest common connection in the Motorola proprietary modulation mode C Fast NOTE This selection does not appear if you have the 326X V 32 bis Series Modem 1 74 AT Commands Option Setting V32bis Auto al Auto V32 V32bis only V32 only V32 Uncoded V22bis only 212 only 103 only V21 only AT Command Setting 0 4 5 6 7 x MM Description The modem negotiates the highest common connection in one of the following modulation modes V 32 bis V 32 V 22 bis Bell 212 V 21 or Bell 103 depending on the setting of the Low Speed option The modem negotiates the highest common connection in one of the following modulation modes V 32 V 22 bis Bell 212 V 21 or Bell 103 depending on the setting of the Low Speed option V 32 bis or V 32 modulation mode is used V 32 modulation mode is used The V 32 modulation scheme is used without the Trellis coded Modulation TCM scheme This selection reduces end to end data delay With this selection you do not have an embedde
146. forming a transmit buffer delay The modem is off hook The modem is negotiating a reliable connection amp V xST The reference to rate in Table 1 1 refers to the range of DCE data rates that are supported by the 326X Series Modem The following data rates may be displayed 24 000 1200 21 600 3003 19 200 16 800 14 400 12 000 9600U2 9600 7200 4800 2400 I The modem is transmitting at a specified data rate using trellis coded modulation 2The modem is transmitting at 9600 bps without using trellis coded modulation 3The modem is transmitting at 300 bps using a frequency shift keyed FSK modulation mode AT Commands 1 33 amp V xST 1 34 AT Commands DTE Rate Status Summary Pressing from the Operating Status display brings you to the DTE Rate Status line The DTE rate represents the speed at which the local modem and DTE are communicating The following definitions apply DTE Rate Display Ext 128 0 115 2 96 0 76 8 72 0 64 0 57 6 56 0 48 0 38 4 28 8 26 4 24 0 21 6 19 2 16 8 14 4 12 0 9 6 7 2 4 8 2 4 1 2 DTE to Modem Rate bps When Clock External Ext is displayed indicating the modem is accepting clock from the DTE NOTE Ext is displayed when the modem is configured for synchronous operation direct synchronous mode or SDC mode 128 000 115 200 96 000 76 800 72 000 64 000 57 600 56 000 48 000 38 400 28 800 26 400 24 000 21 600
147. from the DTE from on to off Automatic Calling Interfaces 3 21 LPDA2 Command Set LPDA2 Link Problem Determination Aid is the communications protocol between IBM host software and transmission devices for exchanging diagnostic and control information LPDA2 commands provide a means for an attached DTE to command the modem to dial a telephone number and report back if the call is successful or not successful The LPDA2 ACU supports dial and leased line operation In dial applications the LPDA2 ACU eliminates the need for the additional ports and equipment that were previously required to support external 801 auto dialing equipment in IBM environments In leased line operation and while connected on the dial line the 326X Series if configured for this operation monitors for LPDA2 commands in the data stream If the local modem detects an LPDA2 command the frame that is being processed is aborted This prevents the remote modem from processing the command frame as valid data How to Configure for LPDA2 ACU To configure for LPDA2 ACU do the following 1 Set the ACU Select option under the ACU OPT S menu to LPDA2 2 Set the Sync Idle option to Mark 3 Set the DSR AT amp S or ATXMR option under the TERMINAL OPT S menu to High LPDA2 ACU Control Commands The LPDA2 ACU operates with the following two control commands 1 A Dial command allowing an attached DTE to dial a telephone number and report back the status of th
148. g FP 116 FP Auto 4L 3 Description The 326X Series allows the DTE to initiate restoral with Circuit 116 Circuit 116 allows you to use off to on transitions of this signal from the DTE to initiate restoral according to CCITT V 24 specifications In Circuit 116 restoral the answer or originating modem can initiate restoral when the connected DTE turns Circuit 116 from off to on by dialing the number stored in its telephone directory based on the setting of the Default Dial option You can initiate restoral manually by pressing the Talk Data key at the Home position on the front panel Once a call is successful an on to off transition of Circuit 116 disconnects the affected modem from the dial line and returns it to the leased line You can manually disconnect either modem from the dial line by pressing the Talk Data key at the Home position on the front panel In automatic restoral the originating modem on the leased line determines when restoral takes place The answer modem cannot automatically initiate restoral it can only answer an inbound call thus ensuring that both modems do not try to call each other at the same time Such an occurrence would result in a failed restoral attempt During data transmission the originating modem monitors leased line signal quality by counting the number of retrains both inbound and outbound that occur over a specified time period NOTE Retrains that cause a change
149. g Interfaces Continued LPIJA2 Disconnect C amimashd errana Disconnect Command Sense IPYIB aa rne ad ac ente Eee oH Rove en Disconnect Response Data Field rtt eerie Using an External Auto Call Unit Bell 801C or Codex 2207 To nimate 8 Gall 2 erp HR RH EAA Hg wor rr ta NM cT Chapter 4 Introduction Testing Your Modem dede TP c S omos Sep TRE coaire icon a Dot latte erent d Cod obe Eb oro e ans Starting the Automatic Self Test 12er iei Hein Hebe ep a Handling Error Messages Lease pecca etnia ced soni Feb dn ete swag Meals Feb PvP e Lu E eundi System b c 326XFAST Synchronous Data Compression Testing Local Analog Loopback Test AT amp T 1 eren Local Analog Loopback Pattern Test AT amp T8 eese Remote Digital Loopback Test AT amp T6 1 oir trema Remote Digital Loopback Pattern Test AT amp T7 sees Data Mode Pattern West iusso tr noter iab be remise EP cepE E daa RAS Local Digital Loopback ATE ES eoo onere st peter podre riain Busy Qut CAVE rsin etur pep PURE eR EHE UREE PARCO PUR OHNE aA Bor EDO suoi E Hiec MR SRM COUR Ele Iu E O O E er 326XPAST DTE Cable Diagnostics 121r rtr teer nctda Chapter 5 Introduction Specifications Physical C haractebtslios 2s od coins cert m Eoi es LEY REL R CIV HEC E Mas REGE EUIS NENE NE Operating Mode ChatacterisHe8 aite rr teer eere n PE pre pep t PiE
150. g and also while the modem is training with the remote modem DCD is on in data mode When the modem is disconnected from the telephone line DCD is off DCD is on when the modem is disconnected so that terminals requiring this signal can use the ACU During dialing DCD goes off until both local and remote modems train and are ready to pass data DCD is on in data mode DCD drops on a disconnect momentarily This setting applies to simulated half duplex applications and works only if the remote modem also supports RTS DCD signaling When the remote DTE turns RTS on DCD is forced on at the local modem The local modem can receive data only during this period Once the remote DTE drops RTS DCD at the local modem follows The Rem RTS DCD option allows you to choose the type of RTS DCD signaling For the Remote setting to work properly set the remote modem s ATE RS RTS command to AT RS2 Remote Also make certain that the Direct data transfer mode is in use and that neither the V 21 nor the Bell 103 modulation mode 1s in use If the direct data transfer mode is not in use or the V 21 or Bell 103 modulation mode is in use DCD behaves as if DCD Normal DCD is always on however it will drop after disconnect and remain low momentarily AT Commands 1 19 amp D AT amp D DTR Control v The AT amp D DTR command determines how the modem interprets the DTR signal Ermar orrs p The local DTE uses DTR Pin 20 to signal th
151. g for all four option sets As an example the option setting portion of the DTR Control AT amp D option appears as follows Option Setting High 1 4L Escape Discon 4D Reset Tail 2 108 1 3 108 2 2 3 Default for the 326XFAST SDC Modem The defaults for the DTR Control option for the 326X V 32 bis and 326XFAST modem are e High for Option sets 1 and 4 the L next to the 4 indicates that High is the default for Option Set 4 for leased line modems models 3261 3263 3266 3268 Discon for Option set 4 the D next to the 4 indicates that Discon is the default for Option set 4 for dial modems models 3260 3262 3265 3267 106 2 for Option sets 2 and 3 The defaults for the DTR Control option for the 326XFAST SDC modem are e High for Option sets 1 and 4 the L next to the 4 indicates that High is the default for Option Set 4 for leased line modems models 3261 3263 3266 3268 Tail for Option set 2 e 106 1 for Option set 3 In this example since High is the default for Option sets 1 and 4L for all products 326X V 32 bis 326X FAST and 326XFAST SDC no product specific distinction is made Where one setting for example 108 1 is the default for Option set 3 in the 326XFAST SDC product a footnote indicates the difference Unless specified by a D or an L defaults apply to all models For options that do not belong to option sets the default setting is designated by the wo
152. g wy scrolls you through the CQMS Parameter Status displays see Table 1 4 for definitions that apply CQMS Status information is important in order to make proper operating decisions Dial modem data traffic typically travels across a mix of facilities provided by local and long distance carriers This fact has significant implications on how you can troubleshoot apparent line problems The entry point into the carrier network is the switched dial line sent from the local carrier Standard lines are typically used for voice and telephone traffic While voice grade lines can be used for data traffic it is better to contract for data quality lines Data quality lines offer improved line quality specifications guaranteed by the local carrier When one dial modem connects to another modem the connection spans different telephone facilities The connection between the dialing modem and the telephone company central office CO is referred to as the local loop COs are connected by intra office exchange connections or by inter LATA long distance connections depending on the distance of the call At the remote answering modem there is a central office to modem remote local loop connection AT Commands 1 41 amp V xST 1 42 AT Commands For a given dial modem dialing various remote modems the only connection that remains constant from call to call is the local loop When one modem dials another modem multiple times the local and remote lo
153. h modifier is not preceded by a semicolon it is ignored by the modem The H or h modifier can be entered through the front panel the AT ACU or network manager These characters do not act as modifiers Instead they are presentation characters that are ignored Automatic Calling Interfaces 3 5 Call Establishment Methods The V 25 bis ACU in your 326X Series Modem supports an addressed mode that uses the commands described in this chapter You can store phone numbers in memory dial calls from memory and perform other ACU functions through the addressed mode In addition to addressed mode the modem supports manual and direct call establishment methods The direct mode allows you to use DTR transitions from the DTE to establish calls The manual mode allows you to manually initiate and answer calls with a telephone and then transfer the call to the modem The direct and manual methods of call establishment are described later in this chapter Modem Configuration Ensure that all option settings under the TERMINAL OPT S menu are appropriate for your application See Chapter 2 Front Panel Operation of this guide for information on the TERMINAL OPT S menu You must set the V25Form option in the ACU OPT S menu to either Bitsync or Charsync for synchronous DTEs or Async for asynchronous DTEs The setting of the DTR option depends on the call establishment method you plan to use Table 3 4 describes these settings
154. he 326X Series Modem apply to the 326X V 32 bis 326XFAST and 326XFAST SDC Modems unless specifically stated otherwise AT Commands 1 5 Figure 1 1 326X Series Main Menu 1 6 AT Commands AT Commands 1 7 1 8 AT Commands Selecting Options and Settings The figure in the left margin that precedes each AT command illustrates the main menu option the right arrow J button indicating that you must press the across key until the described option appears and the resulting submenu option For example the first AT command in the following list is ATD Dialing an Unstored Telephone Number In the figure accompanying this entry you see The main menu option to access Data 9600 T D The front panel control key p to press to display the submenu The ATD Command prompt Enter Then Dial Each front panel option has a default setting Some front panel defaults are determined by the assigned factory preset option sets These preset defaults are exclusive to the particular option set The other factory options are not exclusive to a particular option set and they always have the same default setting regardless of which factory preset option set you are using For options that belong to option sets a number or the word all in parentheses appears underneath the selection A number tells you which option set s the setting is a default for If the word all appears under a setting it means that the setting is the default settin
155. he analog circuitry is faulty the modem displays Bad LAL T D 5 At the local terminal you are now ready to send data NOTE If the data loops back to the local terminal without errors the modem passes the test If the data does not loop back to the local terminal run the test again If it fails again make sure the DTE and modem speeds match 6 To end the test use the front panel keys to move through the TEST OPT S menu until the modem displays TEST End Test Press The modem displays Test Completed To start this test using an AT command enter the following command at an attached terminal AT amp T1 CR To stop this test enter the following command When the screen displays OK enter AT amp TO lt CR gt to end the test The screen displays the OK message indicating that the test has been terminated NOTE This test also can be terminated automatically by entering a nonzero value in the Test Timer S Register 18 The function of S Register 18 is valid only when loopback tests are issued using the AT amp T command S Register 18 cannot be used to automatically terminate loopback tests if the test is initiated from the front panel When the test terminates the screen displays No Carrier This test will run indefinitely if not programmed to terminate itself through this S Register 18 Testing Your Modem 4 7 Local Analog Loopback Pattern Test AT amp T8 4 8 Testing Your Modem Using an
156. he answer modem dials the callback number it encounters the S5 dial modifier The S5 dial modifier instructs the answer modem to train as an answer modem when it calls you back rather than as an originating modem Therefore your modem is called back by the answer modem and can train with it because the callback appears to be coming from an answer modem A typical callback dial string sent from an originating modem appears as follows 555 2345 1111 555 6789 k 5 0 H With the exception of the S5 dial modifier this string is identical to the one in the previous section NOTES 1 If your modem is using its AT ACU and you follow the KO with H a semicolon followed immediately by an H the originating modem hangs up upon completion of the call and is ready to be called back 2 For any dial modifiers used in the callback number you must use the DTMF equivalencies provided in Table 2 2 Manual Dialing and Callback DTMF Equivalencies If you are dialing the answer modem manually via a DTMF Dual Tone Multi frequency keypad or you are providing the callback number in a dial string you do not have the ability to enter all of the dial characters that are available through the ACU or your modem front panel In order to accommodate these conditions the 326X Series Modem recognizes the following DTMF codes as equivalencies see Table 2 2 Table 2 2 DTMF Tone Equivalencies DTMF Tone Equivalent AT or Front Pa
157. holds for each parameter can be used to identify abnormal line performance For example if all local calls connect as expected yet the long distance calls show a higher rate of errors the CO to CO or remote local loop connections may be degraded The 326X Series CQMS parameters measure end to end performance monitoring the transmission signal for noise and other distortions non linear and transient impairments are not measured by the 326X This information is continuously updated to reflect current line conditions for both local and remote devices NOTES 1 The CQMS values are estimates of line parameters and expected performance to be used for planning only and are not intended to be warranties of product performance 2 If your modem is not currently connected to another modem the COMS values that are displayed are of the last call amp V xST Table 1 4 CQMS Parameters Front Panel Display Description PhaseJitter Measured in degrees phase jitter is a continuous fluttering of the incoming analog signal from either its timing signal or from the referenced phase of the main data carrying signal The phase jitter parameter measures the change in phase of the analog signal from the referenced phase of the main data carrying signal The shift in phase is often caused by alternating current components Modulation of the carrier with another signal during transmission causes the change of phase or frequency Range 0
158. hoose the appropriate transmission rate to minimize the error rate and maximize throughput and efficiency ARS operates in the following modulation modes and corresponding data rates C Fast 24 0 21 6 19 2 16 8 14 4 12 0 and 9 6 kbps V32 bis 14 4 12 0 9 6 and 7 2 kbps e V32 V 32 Uncoded 9 6 and 4 8 kbps V22 24 and 1 2 kbps When line conditions deteriorate i e poor signal quality the modem retrains and determines the rate that the line can support Under poor line conditions the modem may fall back by more than one rate For example if operating at a data rate of 24 0 kbps under poor line conditions the modem may retrain to 19 2 kbps instead of 21 6 kbps ARS fallback is based on the High BER setting of the AT RT Retrain option When the modem falls back a longer retrain occurs When line conditions improve based upon the identification of good signal quality the modem falls forward increases the data rate one rate at a time The minimum time required to fall forward is 4 minutes When the modem falls forward a quick retrain occurs NOTE The AT KRT Retrain command must be enabled set to Low BER or High BER if you use the adaptive rate setting The 326XFAST 326XFAST SDC product uses a line probing feature during the initial training sequence Line probing selects the maximum data rate that the line can support as well as the optimal baud rate and carrier frequency at which to run Due to this whil
159. hort form Verbose 1 Result codes are sent to your DTE as full words all long form Refer to Appendix A of the 326X Series Modem User s Guide for a summary of result codes ATX Call Progress v ACU OPT S pe Call Progress The ATX Call Progress command determines whether the modem waits for call progress signals or blind dials when establishing calls AT Command Option Setting Setting Description 0 0 The modem uses only NO CARRIER and CONNECT result codes 1 1 The modem uses only NO CARRIER CONNECT and CONNECT Rate result codes p p The modem waits for dial tone and uses only NO CARRIER CONNECT CONNECT Rate and NO DIALTONE result codes 3 3 The modem detects busy signal and uses only NO CARRIER CONNECT CONNECT Rate and BUSY result codes 4 4 The modem waits for dial tone and detects busy signal Only NO CARRIER CONNECT CONNECT Rate BUSY and NO DIAL TONE result codes are used NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country The following section discusses how each ATX Call Progress command setting works ATX0 or 1 Call Progress 0 and 1 The modem goes off hook waits for the amount of time specified by the Blind Dial option and blind dials whether or not dial tone is present After processing all of the characters in the dial string including dia
160. hronous Data Compression Testing 4 5 Local Analog Loopback Test ATAET1 aee eee 4 5 Local Analog Loopback Pattern Test AT amp T8 esee 4 8 Remote Digital Loopback Test AT amp TO6 enne 4 10 Remote Digital Loopback Pattern Test AT amp T7 ses 4 12 Data Mode Pattern West 12 uere eei tert Fb ttbi Leda ra asoro 4 14 Local Dijital Loopback ATE ES uses caes on oti Fera Eee Eb senna 4 16 Busy Qui ATH IY iib b br bn P EUR DWE HR Pre bo PE P EN B MH AP DNE DE 4 18 erc t ELEIFEN 4 19 326XPAST DTE Cable DIagnoSlles 1 12 rotto nope ttr 4 20 Testing Your Modem 4 1 Introduction This chapter describes tests supported by your 326X Series Modem These tests include a modem automatic self test loopback tests and pattern tests that help you diagnose problems faults in your modem s circuitry and in your data communications system Quick Checks Before starting any of the diagnostic tests described in the following sections check to ensure that The EIA TIA 232 D cable is firmly connected to the 326X Series Modem and to your DTE tighten the retaining screws on the connectors at both ends of the cable All phone line connections at the wall jack and at the modem are secure The AC power outlet for the modem is operating properly The modem is configured properly for your application Refer to Chapter 2 Installing Your Modem in th
161. ides FP 108 ACU restoral if Ext Cntrl option is configured for Pin 20 and the Ext Select option is configured for a setting other than Off The 116 ACU restoral setting allows you to use off to on transitions of this signal from the DTE to activate the ACU This allows the modem to accept dial commands to initiate restoral In the 116 ACU restoral setting the answer or originating modem can enable the ACU when the connected DTE turns Circuit 116 from off to on Once a call is successful an on to off transition of Circuit 116 disconnects the affected modem from the dial line and returns it to the leased line If a call is terminated by any means other than Circuit 116 the modem remains in a disconnected state waiting for ACU commands An on to off transition is required to return to the leased line NOTE The Ext Select option overrides FP 116 ACU restoral if Ext Cntrl option is configured for Pin 14 and the Ext Select option is configured for a setting other than Off AT Commands 1 89 x RP AT RP Parity When using the ASCII character set you must select the parity used by the modem Lass e o and DTE The Parity option applies to only asynchronous and character synchronous data formats The modem ignores parity bits if you are using a bit synchronous protocol but adds parity bits to all data units in the message field in its responses to the DTE NOTE This command is allowed only when remotely configuring another mod
162. ifi c Option L Option Included in Option Sets Figure 2 1 Status Option Sets Dialing Menu Status Option Sets Dialing Menu 2 3 Status Option Sets Dialing Menu All Status Option Sets Dialing options listed below have AT command equivalents which are described in Chapter 1 AT Commands of this guide Options with AT Command Equivalents ATD Dialing an Unstored Telephone Number ATDS Dialing a Stored Telephone Number ATS Assigning an S Register ATZ Selecting an Option Set AT amp F Reinitiate Memory AT amp I Viewing Modem Identification AT amp V AT ST Viewing Modem Status AT amp W Save Changes AT amp Y Power Up in Option Set AT amp Z AT KCN Entering Phone Numbers AT DR Auto Redial AT DS Dialing a Stored Phone Number AT KLN Linking Phone Number AT KND Viewing Stored Phone Numbers 2 4 Status Option Sets Dialing Menu Test Options Test Options Figure 2 2 illustrates the TEST OPT S menu TEST OPT S menu options control how the modem and DTE execute certain modem and line tests Ld Data DCE Rate T D li Pressing this displa y toggles modem l betw een talk data states ww TEST OPT S 4 Y MODULA TION OPT S AT amp T AT amp T gt TEST End Test Accept RDL On LAL Busy Out On v v LAL Off Off RDL LDL P atter n LAL Pat RDLP at Busy Out Retr ain KEY Option Included Countr ySpecifi c
163. in Option Sets 7 Option Figure 2 2 TEST OPT S Menu All TEST OPT S menu options listed below have AT command equivalents which are described in Chapter 1 AT Commands of this guide For specific information on how to use the various tests see Chapter 4 Testing Your Modem for details Options with AT Command Equivalents AT amp T ATH Test AT amp T4 AT amp T5 Accept RDL AT KLL Local Analog Loopback Test Busy Out Test Options 2 5 Modulation Options Modulation Options Figure 2 3 illustrates the MODULATION OPT S menu MODULATION OPT S menu options control variations of the signals between the local and remote modems over the PSTN or private lines TEST OPT S wp gt gt E a i gt i gt I gt MODULA TION OPT S Line Dial ModsC FastA uto Auto Type CCITT Lo w Speed Bell Max Rate 24 0 Min Rate 300 Fast Call Off w Z w ww 321 1200 btt 2W Lease XC Fast Only Code x CCITT 4 2400 vivn b V32bis A uto 4W Lease 16 4800 v Auto V32 j 7200 N32bis Onl 12 9600 N32 Only E 112 0 32 Unco f 144 22bis On j 168 1192 216 240 3212 Only 103 Only V21 Only ATKAP I gt ATCA I gt AT amp X gt AT 2K RT D gt ATY gt AT EMD AT amp G gt Mode Or iginate Cloc k inter nal Retr ain High BER Guard Tone Off V Ber nal Yor S Sl Ans wer v b Loopback bt Ww BER Exter nal ww Auto A ino KEY
164. internal pattern generator to provide data the local analog loopback pattern LAL Pat test examines the transmit and receive circuitry of the local modem As shown in Figure 4 2 a pattern is internally generated and looped from the modem s transmitter to its receiver Data bit and block errors are recorded and displayed on the front panel at the completion of the test LAL Pat test maybe used with or without a DTE connected to test the modem s internal circuitry If connected the DTE data that is sent during the test will be ignored Like the local analog loopback test the local analog loopback pattern test causes the modem to disconnect Remote Pattern Checker Figure 4 2 Local Analog Loopback Pattern Test To run an LAL Pat test 1 Use the front panel keys to move through the TEST OPT S menu until the modem displays TEST End Test 2 Press wr until the modem displays TEST LAL Pat 3 Press The modem displays TEST LAL Pat You will hear the modem training if the speaker is enabled 4 Press W twice to reach the home display The modem displays LAL Training T D briefly and then displays LAL data rate T D For example you may see LAL 9600 T D in the status display 5 To end the test use the front panel keys to move through the TEST OPT S menu until the modem displays TEST End Test Press The modem displays Bit BIk where the number of bit errors and block errors is
165. ion Enable 1 The local modem can be configured by the remote all modem Disable 0 The local modem cannot be configured by the remote modem 1 82 AT Commands KRC AT RC Initiate Terminate or Abort Remote Configuration Session w The AT RC command allows you to initiate terminate or abort a remote configuration session with the connected modem AT Command Option Setting Setting Description Initiate Rmt 2 The modem attempts to initiate a remote Cnfg configuration session with the connected modem Terminate 0 The modem terminates a remote configuration session with the connected modem Changes to the remote modem s configuration are saved This setting is not displayed unless you are already in a remote configuration session Abort 1 The modem aborts a remote configuration session with the connected modem Changes made to the remote modem s configuration are not saved This setting is not displayed unless you are already in a remote configuration session Initiating a Remote Configuration Session with a Dial Modem The AT RC Command To use the AT RC command to initiate a remote configuration session with a dial modem 1 Establish a dial line connection with the remote modem at 7200 bps or greater 2 Enter AT RC2 lt CR gt 3 Your terminal displays INITIATING RC When the remote configuration session has been established your terminal displays RC ESTABLISHED If unsuccessful the terminal
166. ion is unsuccessful and the Mode option is set to Reliable the local modem disconnects If the Mode option is set to Auto Reliable the modems use Normal mode If the Mode option is set to Speed Dependent Auto Reliable and a connection is established at 1200 bps or less Normal mode is used The modems attempt to negotiate MNP error correction If unsuccessful and the Mode option is set to Auto Rel the modems use normal mode If the Mode option is set to Rel the modems disconnect AT FC Fast Call x FC we MODULATIONOPTS pe e Fast Call The AT KFC Fast Call command reduces the time for selected phases of the connect sequence Option Setting Off all Lvll Lvl2 Lvl13 2 3 4L AT Command Setting 0 Description This option disables the Fast Call feature The 2 15 secured billing delay in the answer modem is eliminated in all modulation modes except Bell 212 V 21 and Bell 103 The length of time ABT is sent is reduced by 1 second in all modulation modes Lv12 applies to V 32 coded or uncoded V 32 bis 326XFAST modulation modes only It includes the Lvl1 functionality and shortens the training time in the answer and originate modems by approximately 2 seconds Lv13 includes the Lvl1 and Lvl2 functionality and eliminates error correction negotiation saving approximately an additional one half of a second For proper operation be sure to enable this option and ensure that the ATX SM
167. ion link disconnects PSTN cleardowns and Longspace When a delay is in progress talk data as well as a disconnect in the opposite direction causes an immediate disconnect NOTES 1 When the modem is configured for Mode Direct there is no buffering of data 2 This option does not apply when the modem is in a test mode Option AT Command Setting Setting Description Off AT KDB The Off setting disables the Delay option all BufOrS38 AT KDBI This setting starts the buffer delay timer immediately 3 upon detection of the disconnect request When the timer is operating the modem continues to process either the transmit or receive buffers The modem disconnects when the buffers are empty or the timer expires whichever occurs first NOTE When the modem is set for Direct mode no buffering of data exists and the disconnect is immediate Buf amp S38 AT KDB2 This setting prevents the timer from starting until either the transmit or receive buffers have emptied The modem disconnects Once the timer expires when the modem is set to Direct mode data is not buffered and the timer starts immediately 38 AT kDB3 This setting allows the timer to start immediately upon detection of the disconnect request This disconnect request continues to process either its transmit or receive buffers The modem disconnects when the timer expires regardless of the state of the buffers NOTE When the modem is set for Direct mode no buffering
168. ion ratio The remote modem waits this time before transmitting data to its DTE NOTE Due to variable line conditions or varying types of data frame losses could result with this selection The Throughput Delay Minimization feature is disabled With this setting the remote modem waits until it has received an entire frame of data before beginning to transmit this data to its DTE AT Commands 1 97 TL TT AT TL Tone Length v DIALING OPT S p See Tone Length The AT K TL Tone Length command determines the time duration of the DTMF Dual Tone Multifrequency tone This command is operational only when tone dialing is selected using dial modifiers or the ATT command Option AT Command Setting Setting Description UP 0 Tone length is 72 ms S11 1 Tone length is determined by S Register 11 NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country AT TT Call Timeout v DIALING OPT S n Call Timeout 1 98 AT Commands The AT KTT Call Timeout command determines how long the modem waits from the time it completes dialing to the time it detects answer back tone from the remote modem If the modem does not receive answer back tone from the remote modem within the specified time the modem disconnects The setting of this option also affects the R dial modifier See Dial Modifiers for S
169. is in data mode In applications operating in 326XFAST Synchronous Data Compression mode RTS CTS flow control functions the same as asynchronous applications with the following exception flow control is uni directional from the local modem to the DTE through the CTS signal the modem uses CTS to signal when the buffers are full The RTS signal has no impact on flow control in synchronous applications XON XOFF Pass Through Flow Control The local modem and DTE operate flow control by passing characters embedded in the data stream between them The characters are then passed through PT to the remote site to be acted upon The XOFF character signals the transmitting device to stop sending data the XON character allows the receiving device to start sending data Check your DTE s manual to verify if the DTE recognizes XON XOFF flow control NOTES 1 Pass through flow control must be used with caution when Mode Normal and Modem FlowzOn because XON XOFF characters are acted on by the remote modem at its DCE port 2 Pass through flow control is not applicable in 326X FAST Synchronous Data Compression mode If synchronous data compression is enabled and you select XON XOFF PT the modem behaves as if flow control were disabled Transmit Clock This selection applies only if the modem is operating in SDC mode When the Tx CIk flow control option is selected the modem uses a transmit clock for flow control based on available buffer space
170. it 140 1 69 circuit 141 1 68 Index 3 C Continued Clock option 1 47 clocking 1 47 CNX response V 25 bis 3 11 COMMAND 1 35 command code format LPDA2 dial command 3 27 configuring for dial restoral 2 10 LPDA2 ACU 3 22 CONNECT message 1 54 connecting state with V 25 bis 3 18 CQMS Parameter Status 1 41 CQMS parameters 1 43 EP 1 44 Eglzr SNR 1 44 equalizer signal to noise ratio 1 41 error probability 1 41 Far Echo Lvl 1 44 far end echo 1 41 frequency offset 1 41 Frq Offset 1 43 near end echo 1 41 Nr Echo Lvl 1 44 phase jitter 1 41 1 43 phase roll 1 41 1 44 receive level 1 41 retrains 1 41 1 43 Rx Level 1 43 signal quality 1 41 SQ 1 44 transmit level 1 41 Tx Level 1 43 CTS Control option 1 54 D D to L Dial to Leased option and dial restoral 2 11 data compression 1 57 and EC DC OPT S menu 2 14 Data Compression Status display 1 35 data formats 1 25 NoACU 2 17 V 25bis 2 17 data mode pattern test See Pat data state with V 25 bis 3 19 data transfer mode 1 94 DCD control 1 19 DCD Loss Disconnect 1 54 Index 4 D Continued DCD option 1 19 and the AT amp C command 1 19 EIA TIA signal status description 1 37 Default Dial option 1 55 Default Dialing 1 55 default settings and dial restoral 2 12 defaults front panel options 1 8 option sets 1 8 delayed numbers stored 3 10 dial command for LPDA2 3 27 limitations 1 101 LPDA2 3 27 dial command sense bytes for LPDA2 3 30 dial line jack types 1 2
171. l modifiers the modem looks for data carrier for the amount of time specified by the AT TT Call Timeout command If the modem does not detect data carrier before the time specified by the AT TT Call Timeout command expires it hangs up and displays NO CARRIER If the modem does detect data carrier it displays either CONNECT for setting 0 or a speed specific connect message for setting 1 If your modem is using error correction and the AT XC1 or AT XC2 Rel Msg Short or Long command the modem also displays the suffix RELIABLE or RELIABLE EC xxx DC yyy AT Commands 1 15 1 16 AT Commands ATX2 Call Progress 2 The modem goes off hook and looks for dial tone If it detects dial tone the modem dials If the modem does not detect dial tone it hangs up and displays NO DIALTONE After processing all of the characters in the dial string including dial modifiers the modem looks for data carrier for the amount of time specified by the AT TT Call Timeout command If data carrier is not detected before the time specified by the Call Timeout option expires the modem hangs up and displays NO CARRIER If data carrier is detected the modem displays a speed specific connect message If the modem is configured for error correction and AT XC1 or AT XC2 Rel Msg Short or Long is selected the modem also displays the suffix RELIABLE or RELIABLE EC xxx DC yyy ATX3 Call Progress 3 The modem goes off h
172. lays TEST End Test 3 Press yy until the modem displays TEST RDL Pat 4 Press The modem displays TEST RDL Pat 5 Press W twice to reach the home display The modem displays TEST data rate T D For example you may see TEST 9600 T D in the status display 6 To end the test use the front panel keys to move through the TEST OPT S menu until the modem displays TEST End Test 7 Press The modem displays Bit BIk where the number of bit errors and block errors is displayed If the modem s transmitter and receiver were unable to synchronize the pattern the modem displays No Sync Achieved NOTE If your modem begins the test operating in the MNP or LAPM Reliable mode it attempts to restore the Reliable mode after the test To start this test using an AT command enter the following command at an attached terminal AT amp T7 CR To stop this test enter the following command AT amp TO CR The screen displays the bit errors followed by the OK message indicating that the test has been terminated If the modem s transmitter and receiver were unable to synchronize the pattern the screen displays No Sync Achieved NOTE This test also can be terminated automatically by entering a nonzero value in the Test Timer S Register 18 The function of S Register 18 is valid only when loop back tests are issued using the AT amp T command S Register 18 cannot be used to automatically terminate loopback tests if the test 1
173. leased line modem configured for restoral holds the dial line for 2 minutes while testing the leased line A dial modem configured for restoral holds the dial line for 3 minutes A leased line modem configured for restoral holds the dial line for 3 minutes while testing the leased line A dial modem configured for restoral holds the dial line for 4 minutes A leased line modem configured for restoral holds the dial line for 4 minutes while testing the leased line A dial modem configured for restoral holds the dial line for 5 minutes A leased line modem configured for restoral holds the dial line for 5 minutes while testing the leased line 1 Default with the 326XFAST SDC Modem AT Commands 1 67 LA LC AT LA DTE Circuit 141 v TERMINAL OPT S SOs DTE Ct 141 The AT kLA DTE Ct 141 command controls whether or not the local DTE can send the modem into a local analog loopback by sending a signal on V 24 Circuit 141 Pin 18 to the modem The DTE must support Circuit 141 in order to use this option NOTE A local analog loopback test initiated via DTE Circuit 141 is overridden by front panel or AT test commands Option AT Command Setting Setting Description Off 0 The modem does not respond to a signal on all Circuit 141 Pin 18 On 1 An off to on transition on Circuit 141 Pin 18 causes the modem to initiate a local analog loopback test An on to off transition on V 24 Circuit 141 Pin 18 takes the modem out
174. led Or Rmt Set Denied Failure to set a remote modem s address can be caused by the following The remote modem s Rmt Acc option is set to Disabled The remote modem is running a test Searching for a Remote Modem s Leased Line Address The SRCH RMT LL ADDR menu Figure 2 15 is intended for use with remote configuration on leased lines Using the SRCH RMT LL ADDR option you can search for the remote modem s address SET RMT LL ADDR ww v y SRCH RMT LL ADDR Rmt Ser nnnnnnn red gt I gt I gt Figure 2 15 SRCH RMT LL ADDR Menu Remote Configuration Options 2 41 Remote Configuration Options Once you have determined the remote modem s serial number do the following to search for its address 1 Establish a leased line connection with the remote modem at 7200 bps or greater 2 Display SRCH RMT LL ADDR 3 Press until the modem displays Rmt Ser XXXXXXX 4 See Performing Numeric Entry at the end of this chapter for details on how to enter the modem s remote serial number 5 Press until the modem displays Enter to Set 6 Press The modem displays Wait If successful the modem displays Address xxx If unsuccessful the modem displays Rmt Srch Failed Or Rmt Srch Denied 7 Press p until the modem displays Rmt Nest Modem xx 8 If the remote modem is in a nest and it is on a dual modem nest card select A if itis Modem A on the dual mo
175. lock command sets modem timing and applies to synchronous poxumwors ib a applications only For most dial applications use internal timing If you change this option during a connection the change takes effect immediately Option AT Command Setting Setting Description Internal 0 Internal Transmitter Timing The modem uses all Internal clocking timing signals are passed on EIA TIA 232 D Pin 15 V 24 Circuit 114 Internal timing is used for most applications External 1 External Transmitter Timing The modem uses 2 External timing timing signals are passed on EIA TIA 232 D Pin 24 V 24 Circuit 113 Loopback 2 Loopback Transmitter Timing The modem uses Loopback timing timing signals are passed on EIA TIA 232 D Pin 17 V 24 Circuit 115 NOTE This selection is not available if you are operating in the 326X FAST Synchronous Data Compression mode If you select Loopback with synchronous data compression enabled the modem uses Internal timing instead Default with 326XFAST SDC Modem AT amp Y Power Up in Option Set Como p ee o The AT amp Y Power Up In command assigns the option set your modem uses when you power up It is also used when you are resetting the modem memory AT amp D3 Option AT Command Setting Setting Description Old 0 When you turn on the modem it automatically all uses the last saved option set that was selected when the modem was turned off 1 4 1 4 When you turn on the modem it auto
176. m sends a VAL message upon receipt of the dial command and a all CNX message once an answer back tone is received from the remote modem V25 rate Modem sends a VAL message upon receipt of the dial command and a CNX message followed by the data rate once the modem switches to data mode In the direct data transfer mode the data rate reflects the modem to modem data rate In the normal reliable and auto reliable data transfer modes the data rate reflects the modem to DTE rate If the Rel Msg option is set to Short or Long the connect message appears in the following form CNX rate RELIABLE VAL Only Modem sends a VAL message when the modems switch to data mode None Modem does not send a message to the DTE LPDA2 Address This option allows you to select the modem address The default is OxFF allowing the modem to accept as valid any address received in the information field If the modem LPDAQ2 address is set to a value other than the default valid addresses range from 00x01 to OxFF the address in the information field must match the configured address If the address does not match the command is ignored If the command address is valid the address is saved by the modem and used in the command response ACU Options 2 19 Terminal Options LPDA2 Identification Number This option allows the modem type to be returned in the data response field The modem option settings are as follows Option Setting Description 3260 Sends
177. mand determines what type of guard tone the modem uses in V 22 bis operation The proper guard tone AT amp G option setting is required by your PTT Leave this option set to Off unless your PTT requires the use of guard tone AT Command Option Setting Setting Description Off 0 The modem does not use a guard tone 550 1 The modem uses a guard tone of 550 Hz 1800 2 The modem uses a guard tone of 1800 Hz NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country amp I AT amp I Display Modem ID Como p eee The AT amp I Display Modem ID command allows you to view on your control terminal screen non action information that identifies your modem This information is referred to as the short form status snapshot display The following command option list describes short form modem identification information AT Command Setting Description 0 Software part number 1 Factory product code 2 Country code 3 Product code 4 Network control address optional 5 Serial number The Front Panel You can also view modem status snapshot by using the front panel Press until DTE 19 2 RELIABL appears and press wy until Display Modem Id appears AT Commands 1 23 amp J AT amp J Dial Line Jack Types we Lp 1 24 AT Commands The AT amp J Telco command allows you to make the correct registered
178. matically uses the option set corresponding to the number selected AT Commands 1 47 amp Z KCN AT amp Z AT CN enter Telephone Numbers DATA 9600 TID pees The AT amp Z and AT kCN Enter Phone commands store a telephone number DEUS up to 50 characters in one of the modem s nine telephone book addresses _EnterPhone d 1 48 AT Commands Option AT Command Setting Setting Description 1 9 1 9 Your modem stores the telephone number in the designated telephone book memory location The AT amp Z or AT CN Command To store a telephone number in one of the modem s nine telephone book addresses enter the AT amp Z or AT CN command the telephone book address 1 9 a comma and the telephone number you want to store For example to store the number 1 222 555 4444 in memory location 3 enter ATK CN3 12225554444 CR If you enter the AT amp Z or ATXCN command without specifying a memory location the modem stores the number in address 1 If no telephone number follows the AT CN or AT amp Z command the specified memory location s telephone number is deleted Therefore if you enter AT CN lt CR gt or AT amp Z lt CR gt the telephone number stored in memory location 1 is deleted The Front Panel See the Performing Numeric Entry section in Chapter 2 for details on how to use numeric entry See Dial Modifiers for Special Dialing Requirements in Appendix A of the 326X Series modem User s Guide for a descrip
179. minating a call the modem sends continuous space for 4 seconds ATZ Selecting an Option Set DATA 9600 T D kes Select Options 1 18 AT Commands The ATZ Select Options command chooses which of the four option sets stored in nonvolatile memory is used by the modem When you use Select Options or the ATZ command the new option set takes effect immediately For a description of each action set see Chapter 4 Configuring Your Modem in the 326X Series Modem User s Guide Option AT Command Setting Setting Modem Uses 1 0 1 Option Set 1 2 2 Option Set 2 3 3 Option Set 3 4 4 Option Set 4 NOTE The modem disconnects from the line when the ATZ command is entered Also any test in progress is immediately terminated Since any AT command that follows the ATZ command is ignored by the modem make sure that the ATZ command is the last one entered in an AT command string Use the AT amp Y command to select with which option set the modem powers up AT amp Commands amp C The following sections describe industry standard AT commands that begin with AT amp AT amp C DCD Control v The AT amp C DCD command determines how the modem sets the DCD signal The reRunatorrs b modem signals the DTE with DCD on EIA TIA 232 D Pin 8 V 24 Circuit 109 um Option AT Command Setting Setting High 0 1 Normal 1 2 3 4 ACU On 2 Remote 3 Wink 4 Description DCD is always on DCD is off during dialin
180. mine whether it is operating over the dial or leased line RI OH LED If the modem is connected to the dial line off hook the RVOH LED on the modem front panel is on Status Message If the modem is passing data on the dial line the data rate on the status message line of the Status Menu in the front panel display is followed by R For example if the modem is operating on the dial line at 9600 bps the status message line reads Data 9600 R T D Circuit 117 Pin 16 During restoral the modem turns Circuit 117 Pin 16 on the DTE interface from off to on when it connects to the dial line to initiate a call When the modem disconnects from the leased line to answer an incoming restoral it turns Circuit 117 Pin 16 from off to on Restoral Options 2 9 Restoral Options Configuring for Dial Restoral Option Set 4 the default option set for restoral operation configures the modem as an answer modem in an automatic restoral application for synchronous DTEs If this configuration suits your application use Option Set 4 as a starting point when configuring the 326X Series Modem See Chapter 4 Configuring Your Modem of the 326X Series Modem User s Guide for details on option sets All option settings that apply to normal operation also apply to restoral The procedure outlined in the following sections highlights the options critical to dial line restoral operation Be sure you coordinate local installation with the person wh
181. mmands 1 81 PW RA AT PW Change Password v The AT KPW Change Password command is used as follows scm p AT kPWold password new password lt CR gt charge essen If the change is successful the modem responds with OK The Front Panel 1 Display Change Password 2 Press The modem responds with Old PW 0000 3 The cursor on the leftmost zero is flashing indicating it is selected Using wr to select digits 0 9 and J to move the cursor to the right enter your old password If you are entering a password for the first time enter the factory default password of four zeros 0000 Press again The modem responds with New PW 0000 4 The cursor on the leftmost zero is flashing indicating it is selected Using wr to select digits 0 9 and to move the cursor to the right enter your new password Your password must contain four characters the characters are limited to 0 9 Press The modem responds with Verify PW xxxx where xxxx is the password you have just entered 5 If the password displayed is correct press again The modem responds with Password Saved 6 If the password is incorrect press any front panel key other than to abort the Change Password function AT RA Remote Access v The ATXRA RmtAcc command determines whether your modem allows itself to RMT CONFIG OPT S e be configured by the remote modem AT Command Option Setting Setting Descript
182. mplete the call A typical callback dial string appears as follows 5552345 1111 5556789 0 H 555 2345 is the answer modem s telephone number The dial modifier ensures that the answer modem has picked up before the password is transmitted The password 1111 is transmitted followed by the code This alerts the answer modem that the password is complete but the dial string is not yet finished 555 6789 is the number that the answer modem calls once the password is verified The x0 code tells the answer modem that the entry is complete The 0 followed immediately by a semicolon and a capital H H instructs the originating modem to hang up upon completion of the call NOTE If the originating modem is not placed on hook the answer modem will not be able to call back Refer to Note 1 below for more information Access Security Options 2 31 Access Security Options To dial the answer modem proceed as follows 1 Enter the answer modem s telephone number in the calling modem 2 Once your modem has dialed the answer modem s number you must instruct it to wait for the answer modem to answer the call To do this use the dial modifier or if your modem does not support the dial modifier use the pause K dial modifier The dial modifier instructs your modem to wait for five seconds of silence after hearing the ringback tone This ensures that the answer modem has picked up the call 3 Ent
183. n MOJE Me 5 3 Mons ims MODELO pO MOGE asa eisdartess te enia fasi vs ERN a EN PURSE pines Di Rus 5 3 N 22 Modulation Mode rretan E e b ro Vil est ea RR ERA AD Ata ERE HUE Mr ERR lee 5 3 Bol 212 Medulation Mode iioii cst tp H bles pde bic IRR DS 5 3 Val Modulation Mode sarea a eneee E NEE AOA 5 4 Bell 1403 Modulation MOUE serros ernro Aa EEN 5 4 Enyronmenta LIMIS ariani e e IDE E E E 5 4 Primary Power ReguiremenfsS 212r rt re bep erem ER IER eaa 5 4 TEE RH OE Lon aol even t IEN EEE felon eoi N Enn eR tos tae o Fe GRE edu 5 5 dong 5 5 Bion na METTE t alice Meena eaden 5 5 Specifications 5 1 Introduction This chapter contains the physical and operating specifications for standalone 326X Series Modems Models 3260 3261 3265 and 3266 Specifications for 326X Series Modems Nest Cards Models 3262 3263 3267 and 3268 are provided in Appendix D 326X Series Modem Cards in the 326X Series Modem User s Guide NOTE Throughout this guide all references to the 326X Series Modem apply to the 326X V 32 bis 326X FAST and 326XFAST SDC Modems unless specifically stated otherwise Physical Characteristics Height 2 55 in 6 98 cm Width 6 75 in 17 14 cm Depth 9 6 in 24 38 cm Weight 2 75 lb 1 24 kg Operating Mode Characteristics Telephone Line Type e 2 Wire Dial 2 Wire Leased 4 Wire Leased 3261 3263 3266 3268 models only FAST Modulation Mode FAST is a Motorol
184. n addressed mode 3 17 data state 3 19 dialog state 3 18 direct answering 3 20 direct dialing 3 20 direct mode 3 20 disconnecting 3 19 idle condition 3 17 manual mode answering 3 21 dialing 3 21 modem configuration 3 6 programming guide 3 13 responses CNX 3 11 INC 3 11 INV 3 11 LSN 3 11 VAL 3 11 synchronous bit oriented frame formats 3 15 synchronous character oriented frame formats 3 16 synchronous frame formats 3 13 V 25 bis commands 3 7 CIC Connect Incoming Call 3 7 CRNn Call Requested Number 3 7 CRSa Call Request with Address 3 7 DIC Disregard Incoming Call 3 8 PRNa 3 8 RLD Request List of Delayed numbers 3 9 RLF Request List of Forbidden Numbers 3 8 RLN Request Listed Numbers 3 9 V Continued V 25 bis control signaling in addressed mode 3 17 V 25 bis responses 3 10 CNX Connection 3 10 INC INcoming Call 3 10 INV INValid 3 10 LSD List of Stored Delayed numbers 3 10 LSF List of Stored Forbidden numbers 3 10 LSN List of Stored Numbers 3 10 VAL VALid 3 10 V 25bis character selection 2 18 responses 2 19 V 32 bis modulation mode selecting 1 74 specification for 5 2 V 32 modulation mode selecting 1 74 specification for 5 3 V 42 1 62 V25 Char option 2 18 Form option 2 17 Resp option 2 19 VAL response V 25 bis 3 11 viewing stored telephone numbers 1 78 Volume option 1 11 X XON XOFF flow control signals 1 74 Index 13
185. n the front panel 7 Press to enter your changes into nonvolatile memory You can store your modifications into any of the four option set addresses Doing so overwrites the settings for the selected option set Remember to wait for the Saved Completed message 8 Set the Telco option under the TELCO OPT s category for the appropriate jack RJAMB RJA5S or RJ16C Your modem is now configured for MI MIC control by an external dialer Make sure that the cable between the dialer and the modem DIAL LINE jack supports the MI MIC leads on Pins 3 and 6 To Initiate a Call Refer to the user s manual supplied with the external dialer To Terminate a Call A call may be terminated by any of the following conditions f the DTR option is set to 108 2 and the DTE drops the DTR signal If the Talk Data softkey at the Home position is pressed f a disconnect is initiated at the remote modem and disconnect signaling is sent to your 326X Series Modem Automatic Calling Interfaces 3 33 Chapter 4 Testing Your Modem Contents Bul QR EIONE ducas ein ca ised an A pata oa ey eate Eon od a a tl watt yp cron rund 4 2 RN E cs ag iE DURUM eR MEM 4 2 Automate Sel 77 DTE 4 2 Starting the Automatic Self Test cic sccsvsicscsesscvesusisescavssseasstasavasnshevourosnens 4 3 Handling Eror Messages oc sas ccsssusubsaniecathsteau itn in ay om adn ep Ede 4 3 oystem LEUNG icai deri Eb CERRAR DPENU TI HE BM Dari als 4 4 326XFAST Sync
186. nagement data to its NC port out jack opt 2 No filtering is performed by the local or remote modems The modems pass all network management data received from the NC port to the in band secondary channel and from the in band secondary channel to the NC port 2 36 Network Control Options Remote Configuration Options Remote Configuration Options Figure 2 13 illustrates the RMT CONFIG OPT S menu The options in the RMT CONFIG OPT S menu along with the SET RMT LL ADDR and SRCH RMT LL ADDR menus provide all the options needed to read status information and configure a connected 326X Series Modem All guidelines described in this section apply to all three of these menus ACCESS SECURITY ww p gt AT RC i gt I gt RmtAcc Enable Disable RMT CONFIG OPT S Dy Y SET RMT LL ADDR Figure 2 13 RMT CONFIG OPT S Menu The RMT CONFIG OPT S menu options listed below have AT command equivalents which are described in Chapter 1 AT Commands Options with AT Command Equivalents AT KRA Remote Access AT K RC Terminate Initiate or Abort Remote Configuration Session The remote configuration function can be used in two wire dial or four wire leased line applications Since it uses an in band secondary channel that is not disruptive to user data a remote configuration session can be established while modems are passing user data Two remote configuration methods are av
187. nd Lhaling 4 eiie e erede d es 3 20 Deverell SOS WP eee s necem cep ey eot tm e Cota eraat Ria Eo n tC eimi Re Cina 3 21 Manal Dialing 3 21 LPDAZ Command SOC ass d erdt usine a Fe PE ea se ealeadnas 3 22 How to Contisure for LPDA2 AU ctt tip been Repo deren 1d 3 22 EPDAZ ACU Control Commands iisscenn ea Foret rina ear hh cera tous 3 22 LPDA2 Message POUTUSTa ee eorr tno Ert Rex rS y PEU a 3 23 Information Field Format and Command 1 eoe ee center ete ce 3 23 Header Hi associe odo hio HR Hiep bue HR o bM 3 24 MSIE dU MH THE p 3 24 Modem deesse cen onn Da m HR E a TI tp Ps ees 3 24 Sorin EO o AUD NND T TR 3 24 Data PCD oann aa 3 24 Information Field Format and Response tree 3 25 Header H Response Field uices cites ic re aibi ette ri rca tipa ced un 3 25 identiier Fek P ET OT E o o Tm 3 25 Modem Address A J casco onde be casi bE oti C ELO CL Dt bt lii be cd ik up pte 3 26 PTC COO TIT EA peer A no eee mer imer embed enns 3 26 DERE oat tom DO I auni center iom Mu Mop reer eb iG 3 26 Eua TROP ENT sve trae esapie tra Gin Son dla SUE IR RE EROR take a UND teehee aes 3 26 DERSUIES RIES lene ere eee re ei eee Deere revere Tu eererr re met ec ret re tne errr Cerner tern tee 3 27 LPDA Disa ec 3 27 Dial Coniiiand Sense Bytes iudei x nace bd x bob be desk ox EROR Rd ade 3 30 Dial Response Dato Biel ioci sod tst a Sx bae bxY HEU RP o UEM E Du reines 3 31 Contents continued Chapter 3 Automatic Callin
188. nds must follow the format of this option Option Setting NRZ all NRZI AT Command Setting 0 Description The modem uses the NRZ data encoding format The modem uses the NRZI data encoding format AT DI Leased to Dial Option Cw psum In an automatic restoral application the originating modem uses the setting of its AT DI L to D Leased to Dial command setting as a trigger for automatic restoral The L to D option selects a threshold for the number of retrains that occurs over a period of time The originating modem initiates restoral if the number of retrains that occur over the designated time exceeds the threshold set by the L to D option The default setting for the L to D option is Low Fast AT7KDIO This is the most sensitive setting for this option and allows the modem to initiate restoral when signal quality deteriorates slightly Leave this option set to Low Fast to determine if it is sensitive enough for your application If you find that the Low Fast setting is not sufficiently sensitive set the AT RT Retrain command to Low BER to make the modem more sensitive to poor signal quality If you find that the modem is too sensitive to poor signal quality set the Retrain option to High BER and change the setting of the L to D option to a less sensitive setting Table 1 5 lists the number of retrains that must occur over a specified time for each setting of the AT k DI command Table 1 5 L
189. ned to the DTE Automatic Calling Interfaces 3 27 Table 3 8 LPDA2 Dial Modifiers LPDA2 Dial Modifiers Hex Value Definition 0 9 S CNKHK OxC 0x0 0x9 0xE2 0xE5 OxE6 OxA4 OxEO OxE7 OxE3 OxE8 OxE9 OxE4 OxC Dial digits packed two per byte This modifier causes a delay of up to the number of seconds specified in S Register 6 Dialing continues only when dial tone is received by the modem If dial tone is not detected during the delay time the modem terminates the command and goes on hook This parameter causes the modem to go on hook for 7 seconds and then off hook again This is called a flash hook and is usually used to signal the phone system to return a dial tone When the modem is back off hook again it waits for dial tone for up to three seconds before proceeding with the next modifier If dial tone is detected before the three seconds are up the modem continues executing the dial command This modifier instructs the modem to pause for the length of time defined in S Register 8 before continuing to dial The 326X Series Modem attempts to connect at the rate and associated modulation mode specified by the Min Rate AT MN option It affects the speed of only the call attempt associated with the command that contains the modifier The modem returns to its original speed setting when the call attempt or the connection ends whichever occurs last This modifier allows the modem to op
190. nel Dial Character x0 0 End x1 W w Dial Wait x2 K k lt Pause Delay 3 Wait for five seconds of silence 4 T t Tone x5 R Reverse calling modem trains as an answer modem x6 P p Pulse KK X Provides a as part of the callback number TH Delineates password from callback number Access Security Options 2 33 Network Control Options Network Control Options Figure 2 12 illustrates the NETWK CNTL OPT S menu NETWK CNTL OPT S menu options control how your modem interacts with the network manager ACCESS SECURITY ww NETWK CNTL OPT S Ov err ideMode Off D v NC Address 000 NC P ortRate 75 D Pass Thr u opt 1 v v 110 opt 150 On 4 Y RNT CONFIG OPT S Figure 2 12 NETWK CNTL OPT S Menu The options in the NETWK CNTL OPT S menu described below can be selected only from the front panel The following sections provide a detailed description of the option settings 2 34 Network Control Options Override Mode Network Control Options The Override Mode option determines whether your modem can be controlled by the network manager Option Setting Off On Description The network manager can attach your modem Once the network manager has attached front panel control is locked out You can still use front panel keys to read your option settings and status through the front panel menu tree but you cannot change any option
191. ng link negotiation will be rejected lost by the error correcting modem in either answer or originate mode 326X V 32 bis Modem Direct 2 3 AL Normal Reliable Option Setting 326XFAST 326XFAST AT Command SDC Modem Setting Modem Direct 2 3 4L Normal Reliable Direct Normal Reliable 0 2 xSM Description Direct In Direct mode asynchronous or synchronous the modem does not use error correction When the modem operates in Direct mode all of the options in the EC DC OPT s menu are disabled During data mode the DTE speed must match the modem s speed Normal In normal mode asynchronous the modem does not use error correction or data compression The break type is assumed to be standard During data mode the modem uses speed conversion if enabled This allows the modem to automatically accommodate DTEs of different speeds Enable terminal flow control when operating in Normal mode The modem flow control should also be enabled using the Modem Flow option NOTE Selecting Mode Normal results in a Direct synchronous connection in the 326X FAST Synchronous Data Compression mode Reliable In an asynchronous application with this selection once the local modem connects with the remote modem it attempts to establish an error corrected link During Reliable data mode the modem uses speed conversion if enabled The local modem disconnects if it cannot establish an error correcte
192. nk Telephone Numbers 5er rrr rtr retro eioes AT XLS Low Speed AT KLT DTE Pin 25 e AT EK MD PSTN Signaling ATL3EMP Modem Flow Gonltol us eesctanteie atre pca t erona u S AT KMM Modulation Mode AT KMN Minimum Rate PUL Se MUIR ATES DAR Contool arcra aray err E br EPR OH EE CELO Ee Cord AT K MS AT Messages AT KMX Maximum Rate vi T Wo d 4 ett te KOX X OR POR OR d LR oR EROR o X 3 Ww 9 amp o 5 4 X amp OX o o X Y nb 1ud 250000 000000 4 4 U taU ta Ui CA Un CA CA CA CA Ca Ca Ca Can Ca Ca d A AD O00 RR P amp MPFD CGOAOuoo0 00d UP cCOC OC QONw00 1 10 Uu ERR ERU U FbJ Lb OOO oo Contents continued Chapter 1 AT Commands Continued PAN Burer CODIIDE 355 no LEER ERE VERA AEIR UO e REP UU V tU Eu FRE EES 1 77 ATSEINC Network Compensation Le scoop etra ecu stas eril e E6d iie inenen 1 78 ADXND View Stored Telephone Numbers 25 5 5 etr ett perr e reet nas 1 78 AT ROC DE BEST C ODIBID ues a too istoc PE CM a CE OB vut UM UGG LDE 1 79 AT OP External Option Set Select etit rte erri nes 1 79 ATKOS CObverspeed ien Gnd cmt eni nis Cot cin ela bci Gent e Eos ke CREE ates 1 80 AT PE Enable Disable Password Protection esee 1 80 AF TF Paik PROPRSCDRON oe ncc Eo bis Euer obi veo Geb Ceu HE Ce uis Eu Re Eo Cru Out Upon 1 80 AL RPN Unlock Password Protection ie tet Dre Per ri deban reden 1 81 FUE d
193. ns Front Panel Security Options Figure 2 10 illustrates the FP SECURITY menu FP SECURITY menu options allow you to protect some aspects of modem operation by using a password When you enable the front panel password function in the modem you must enter the password before you can perform the following operations List phone numbers through the front panel AT commands or V 25 bis commands Store phone numbers through the front panel AT commands or V 25 bis commands Change options through the front panel or AT commands Have phone numbers echoed during redialing DIALING OPT S ww gt AT PW Shange Password gt I gt Set Protection Password Disable w Enable Enter Password FP SECURITY ww Y access sECURIY Figure 2 10 FP SECURITY Menu Some FP Security menu options listed below have AT command equivalents which are described in Chapter 1 AT Commands The remaining FP Security options which you can select only from the front panel are described immediately following this list Options with AT Command Equivalents AT PE Enable Disable Password AT PF Setting Protection AT KPN Unlocking Password Protection AT KPW Entering and Changing a Password 2 26 Front Panel Security Options Front Panel Security Options If a 326X Series Modem is password protected you do not need to enter the password to Dial a
194. ntrol amp S KMR v cum DSR The AT amp S and AT MR DSR commands determine how the modem sets the DSR signal The modem signals the DTE with the DSR on EIA TIA 232 D Pin 6 V 24 Circuit 107 Option AT Command Setting Setting High AT EMRI 1 AT amp SO Normal AT k MRO 3 4 AT amp S1 2 DTR ATXMR2 Drop on Dise AT MR3 2 Sim LL ATXMR4 Description DSR is always on DSR is controlled by the modem DSR is on when the modem recognizes that it is communicating with a compatible modem DSR follows DTR The same as the Normal setting except that when a disconnection is initiated from the local end DSR is dropped immediately The same as the DTR setting except DSR is dropped when the remote modem requests a disconnect Default with the 326XFAST SDC Modem AT Commands 1 29 amp T AT amp T Test CX CE 1 30 AT Commands The AT amp T Test command is used to initiate and terminate tests See Chapter 4 of this guide for a complete description of each test Option Setting End Test all LAL RDL LDL Pattern LAL Pat RDL Pat Busy Out Retrain AT Command Setting 0 ATHI ATHO ATOI Description Ends the test currently in progress for each test listed below except for the Retrain test Initiates a local analog loopback test Initiates a remote digital loopback test Initiates a local digital loopback test Initiates an end to end pattern test Initiat
195. nually retrain the modems for the following reasons The automatic retrain function is disabled and you want to improve signal quality by retraining Signal quality is poor and you do not want to wait for the modem to retrain automatically To initiate a retrain do the following 1 Use the front panel keys to move through the TEST OPT S menu until the modem displays TEST End Test 2 Press w until the modem displays TEST Retrain 3 Press to initiate a retrain The test terminates automatically To initiate a retrain using an AT command enter the following command at an attached terminal When the screen displays OK enter AT01 lt CR gt A connect message appears on the screen For example you may see Connect 9600 Reliable indicating that the two modems have returned online and initiated a return Testing Your Modem 4 19 326XFAST DTE Cable Diagnostics 4 20 Testing Your Modem This section contains a procedure to help you determine if there is a problem with the DTE cables you selected to operate with the 326X FAST Modem Appendix B Cabling and Interface Pinouts in the 326X Series Modem User s Guide specifies how to select the appropriate cables to use in data rates higher than 38 4 kbps After selecting and installing the correct cables perform the following steps before proceeding with installation If you continue to experience problems with data transmission after choosing a cable and r
196. number stored in the memory location designated by the Default Dial option setting Once connected the modems transmit data synchronously If DTR transitions from on to off the modem hangs up and returns to the asynchronous command mode If DTR is low the modem does not auto answer Man Dial 3 DTR signals toggle between talk and data modes With DTR off numbers can be dialed from a telephone Once an answer tone is heard the telephone is hung up and DTR is raised the modems connect and send data synchronously If DTR is dropped the modems disconnect 1 26 AT Commands amp P AT amp P Pulse Cycle The AT amp P Pulse Cycle command determines the make percentage of the dialing CK omnc orrs pulse make break ratio Option AT Command Setting Setting Description 40 0 The make break ratio is 40 60 33 1 The make break ratio is 33 5 66 5 38 2 The make break ratio is 38 5 61 5 NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country AT Commands 1 27 amp R CT AT amp R AT CT CTS Control CX smi CTS 1 28 AT Commands The AT amp R and AT KCT CTS commands determine how the modem sets the CTS signal The modem signals the DTE with the CTS on EIA TIA 232 D Pin 5 V 24 Circuit 106 The CTS signal discussed below is the state of the CTS signal after the
197. o is installing the remote 326X Series Modem NOTE The Restoral Option and its option settings appear on your modem s front panel only if you have the Restoral option installed Models 3261 3263 3266 and 3268 include the Restoral option 1 Set the Restore option AT K RE under the RESTORAL OPT S menu to select the restoral initiation method For automatic restoral be sure to set this option the same in both the local and remote modems Although one modem in the link originates a call and the other answers both modems can initiate or answer a restoral call 2 Configure one modem as the answer modem and one as the originating modem through the Mode option AT KCA under the MODULATION OPT S menu Confirm this setting with the person at the remote site If you plan to use restoral make sure that the answer modem is set for auto answering NOTE Unless Ans Rest Always AT K AS under the RESTORAL OPT S menu the modem does not answer an incoming call if it is in data mode this prevents the modem from answering a wrong number 3 To use automatic restoral set the L to D option AT KDI under the RESTORAL OPT S menu of the originating modem 4 Set the DTR option AT amp D under the TERMINAL OPT S menu to satisfy your application The DTR signal controls the connection to the dial line in restoral operation The DTR signal from the DTE must be on or set properly in the modem for dialing and answering to take place
198. o move through the TEST OPT S menu until the modem displays TEST End Test 7 Press The modem displays Test Completed NOTE The modem performs this test in the normal mode If the modem begins the test operating in either the MNP Reliable or LAPM Reliable mode the modem attempts to restore the Reliable mode after the test To start this test using an AT command enter the following command at an attached terminal AT amp T3 CR To stop this test enter the following command AT amp TO CR The screen displays the OK message indicating that the test has been terminated NOTE This test also can be terminated automatically by entering a nonzero value in the Test Timer S Register 18 The function of S Register 18 is valid only when loopback tests are issued using the AT amp T command S Register 18 cannot be used to automatically terminate loopback tests if the test is initiated from the front panel When the test terminates the screen displays OK This test runs indefinitely if not programmed to terminate itself through this S Register 18 Testing Your Modem 4 17 Busy Out ATH1 4 18 Testing Your Modem The TEST option Busy Out setting allows your modem to appear busy to incoming calls This option is useful when performing maintenance and repairs on the modem NOTE This setting should used only for the Telco RJ4MB setting under the TELCO OPT S menu for use with a make busy data jack Do not use the Busy Out
199. of data exists However the modem delays a disconnect until the timer expires Default with the 326XFAST SDC Modem DC xDD AT DC Data Compression v EC DC OPT S p eS The AT DC DC command determines the data compression technique used by your modem NOTE This option does not apply when the 326XFAST SDC Modem is configured for synchronous data compression operation Option AT Command Setting Setting Description Disable 0 Data compression is not attempted Enable 1 Data compression is attempted all If your modem is using LAPM error correction it uses V 42 bis data compression if DC Enabled NOTE In an application with 326XFAST Synchronous Data Compression enabled LAPM error correction and V 42 bis data compression only are used If your modem is using MNP error correction it attempts to negotiate V 42 bis and MNP 5 data compression with the remote modem Depending on which data compression type can be accommodated by the remote modem V 42 bis or MNP 5 is used Otherwise no data compression is used AT DD Dial Wait v DIALING OPT S TE Dial Wait The AT KDD Dial Wait command instructs the modem to stop and wait for a dial tone The modifiers are as follows e W ew Option AT Command Setting Setting Dial Wait p 0 2 seconds 3 1 3 seconds 4 p 4 seconds 6 3 6 seconds 12 4 12 seconds 15 5 15 seconds 20 6 20 seconds 30 7 30 seconds 40 8 40 seconds S7 9 Dial wait is determined by setting
200. ompression is included A typical short reliable connect message appears as follows CONNECT 9600 RELIABLE The modem sends a reliable connect message to the DTE when a connection is successful The message indicates that the local DTE to modem data rate as well as the error correction and data compression schemes are being used A typical long reliable connect message appears as follows CONNECT 9600 RELIABLE EC LAPM DC V42bis AT Commands 1 99 X ZC AT ZC Callback Feature v ACCESSSECURITY m Callback 1 100 AT Commands The AT kZC Callback command determines the source of the telephone number that your modem calls when it receives a valid access security password from the remote modem AT Command Option Setting Setting Off 0 all Intern 1 9 1 9 Remote 10 Manager Only accessible using a network management system Rmt Ind 12 Description Callback is disabled The answer modem performs the callback using the phone number stored in the specified location Even if the calling modem provides a callback number the local modem uses the internally stored number The answer modem performs the callback using a number provided by the remote user If the calling modem does not provide a callback number and the password is valid the modem attempts a connection without hanging up or calling back The network management system performs the callback by using a phone number stored in its database tha
201. on Sets m Countr ySpecifi c 7 Option AMA Maka dd dala Figure 2 7 TERMINAL OPT S Menu Terminal Options 2 21 Terminal Options 2 22 Terminal Options Some TERMINAL OPT S menu options listed below have AT command equivalents which are described in Chapter 1 AT Commands The remaining TERMINAL OPT S options which you can select from the front panel a network management system or using remote configuration are described following this list Options with AT Command Equivalents AT amp C DCD Control AT amp D DTR Control AT amp R ATCT CTS Control AT amp S AT KMR DSR Control AT CD DCD Loss Disconnect AT KDE DTE Rate AT kDL RTS CTS Delay AT kDT DTR Delay AT FL Flow Control ATLA DTE Circuit 141 Circuit 141 Local Analog Loopback AT XLD DTE Circuit 140 Circuit 140 Remote Digital Loopback AT KLT Pin 25 Control AT XOP Select Option Sets External Option Set Select AT OC External Control AT kOS Overspeed AT KRS RTS Control AT kSC Speed Conversion AT SI DTE Inactivity AT SR Remote RST DCD AT K TD Throughput Minimization Delay Telco Options Telco Options Figure 2 8 illustrates the TELCO OPT S menu TELCO OPT S menu options control the modem s interface transmit level with the PSTN and private lines the speaker and telco jack TERMINAL OPT S TELCO OPT S Telco RJ 11C LL TX Le vel 0 Volume Medium v v v RJ 455
202. one or ring back tone was detected in the remote modem When a call was sent to the remote modem after a pause the remote modem failed to respond with an answer back tone The local modem will wait the amount of time specified by the Call Timeout option and then hang up Call Failure Indication Ring Tone Ringback is detected but the call is not completed due to a timeout Delayed Call The telephone number is on the delayed call list The modem cannot dial the number as instructed The PTT may require the modem to place a number on a delayed call list if a call to that number fails The modem cannot dial a number on the delayed call list until the prescribed time the xxx designation expires or until the power to the modem is turned off and then on again Automatic Calling Interfaces 3 11 Call Progress Responses When using V 25 bis the 326X indicates a valid connection when it switches to data mode by turning DSR EIA TIA 232 D Pin 6 V 24 Circuit 107 and DCD EIA TIA 232 D Pin 8 V 24 Circuit 109 from off to on In addition to this hardware response you may want to receive call progress responses at the DTE The modem uses the VAL valid and CNX connect messages to indicate call progress You enable the call progress messages through the V25 Resp option in the ACU OPT S menu in the front panel display The following settings for the V25 Resp option apply None The modem does not send any CONNECT messages to the DTE VA
203. ontinued Chapter 1 AT Commands Continued ATE ADECIN Enter Telephone Numbers ioco r r tr Ur FIR des AT Commands AT KAA Answer AT AP Adaptive Rate AT AS Answer in Restoral ATK AY Auto Type AT BD Blind Dial AT BK Break Handling AL CA CAuswerOrpinale Mode eire ttt trn rb eae Te ae iere pre due AT RCD DCD Lass Disconnect oos ccs pne ee phot e Epit e Ern btt Ero rl NESET Erroni AT KCM Connect Message ATRCN AT amp Z Entering Telephone Numbers eene ATCT AT amp R C TS AT KDA Default Dialing AT kDB Buffer Delay AT KDC Data Compression AT KDD Dial Wait AT KDE DTE Rate AT DF Data Format ATODIQ Leased to Dial OpEOU s ede b acta uh C RIS aiden eo aia AT KDL RTS CTS Delay AT DP Pause Delay AT DR Auto Redial AT KDS ATDS Dial a Stored Telephone Number AT KDT DTR Delay AT KEC Error Correction AT FC Fast Call AT FL Flow Control AT KHD Hold Dial Line ATLA DTE Circuit 141 AT kLC Line Compensation AT LD DTE Circuit 140 AT KLE Dial to Leased Option Automatic Disconnect AT KLL Local Analog Loopback Test Busy Out sess ATSELN Li
204. ook waits for the amount of time specified by the AT BD Blind Dial command and then blind dials After processing all of the characters in the dial string including dial modifiers the modem starts the AT k TT Call Timeout command timer and looks for a busy signal ringback and data carrier If a busy signal is detected before the time specified by the AT TT Call Timeout command expires the modem hangs up and displays BUSY The length of time between finishing dialing and displaying the BUSY message is the amount of time the modem takes to detect the busy signal If data carrier is not detected before the time specified by the AT TT Call Timeout command expires the modem hangs up and displays NO CARRIER The length of time between finishing dialing and displaying the NO CARRIER message is the amount of time specified by the AT TT Call Timeout command If data carrier is detected the modem displays a speed specific connect message If error correction is enabled and AT XC1 or AT k XC2 Rel Msg Short or Long commands are selected the modem also displays the suffix RELIABLE or RELIABLE EC xxx DC yyy ATX4 Call Progress 4 The modem goes off hook and looks for dial tone If a dial tone is detected the modem dials If not the modem hangs up and displays NO DIALTONE After processing all of the characters in the dial string including dial modifiers the modem looks for a busy signal ringback and data
205. op the switched network data connection and go on hook There are no modifiers for this command This command may be issued while the modem is offline or online In either case a valid response is returned to the DTE In leased line operation a Disconnect command while in restoral will disconnect the switched network connection and send the modem back to the leased line If a Disconnect command is received by the modem while on the leased line the command is ignored Disconnect Command Sense Byte In the response to the Disconnect command the sense byte can contain only the following error code 0x08 This sense byte is sent when the modem has received an invalid command Automatic Calling Interfaces 3 31 Disconnect Response Data Field When a sense byte other than 0x00 is sent in the response there is no response data field When the disconnect is successful a sense byte of 0x00 is sent in the response and a data field is included The format of this data field is as follows Bytes 0 1 Modem type OxYYYY Byte2 Modem model code 0xZZ Byte3 0x20 Indicates if Disconnect command is received from modem while in a disconnect state 0x80 Indicates if Disconnect command is received from modem while not in a disconnect state The 326X Series Modem allows you to select the modem type to be returned in the data field You can configure the modem type Y Y Y Y for 326x the default setting or 7855 The modem model code ZZ reflect
206. ore information about S Register 10 NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country AT CM Connect Message rsp The AT CM command allows you to select whether you want to display the current DTE or DCE rate after the connect message Refer to DTE Rate Status Summary section on page 1 34 for possible DTE DCE rates Option AT Command Setting Setting Description DTE Rate CMO Selecting DTE Rate results in the current DTE rate being default displayed on your terminal after the connect message DCE Rate CMI Selecting DCE Rate results in the current DCE rate being displayed on your terminal after the connect message AT CN AT amp Z Entering Telephone Numbers See the AT amp Z command description AT CT AT amp R C TS 1 54 AT Commands See the AT amp R command description DA AT DA Default Dialing v The AT kDA Default Dialing command controls the Default Dial feature When xvors e e o the Default Dial option is enabled the modem dials the telephone number in the specified address if one of the following conditions occurs This option also determines the telephone number dialed during restoral Option AT Command Setting Setting Description Off 0 The default dial feature is disabled 1 2 3 4 D 1 9 1 9 The modem direct dials the telephone number AL stored
207. ort is configured for 128 000 bps The DTE port is configured for 115 200 bps The DTE port is configured for 96 000 bps The DTE port is configured for 76 800 bps The DTE port is configured for 72 000 bps The DTE port is configured for 64 000 bps The DTE port is configured for 57 600 bps The DTE port is configured for 56 000 bps The DTE port is configured for 48 000 bps The DTE port is configured for 38 400 bps The DTE port is configured for 28 800 bps The DTE port is configured for 26 400 bps The DTE port is configured for 24 000 bps The DTE port is configured for 21 600 bps The DTE port is configured for 19 200 bps The DTE port is configured for 16 800 bps The DTE port is configured for 14 400 bps The DTE port is configured for 12 000 bps The DTE port is configured for 9600 bps The DTE port is configured for 7200 bps The DTE port is configured for 4800 bps The DTE port is configured for 2400 bps The DTE port is configured for 1200 bps 2400 bps is the lowest speed available with the 326X FAST SDC Modem The DTE port is configured for 300 bps 2400 bps is the lowest speed available with the 326X FAST SDC Modem AT DF Data Format x DF DI Cw um This option allows you to specify the data encoding format to be used during SDC connections NOTE This option applies only to SDC data mode It does not apply to synchronous ACU s V 25 bis or LPDA2 while disconnected In the online mode LPDA2 comma
208. ows Byte bit 0 Must be coded as 1 bit 1 Not used by the modem bit 2 Command flag Must be coded as 0 bits 3 7 Not used by the modem Byte 1 Not Used Modem Address A The default for the Modem Address option is OxFF This allows the modem to accept as valid any address received in the information field If the Modem Address option is set to a value other than OxFF valid range is 0x01 to OxFB the address in the information field must match the configured address If the address does not match the command is ignored If the address is valid the modem address is saved by the modem and used in the response Command Code C This field is one byte long and contains the command code to be executed by the modem Data Field D The length and contents of the data field are command dependent 3 24 Automatic Calling Interfaces Information Field Format and Response The information field format differs from a command response as shown below lt Information Field gt F The Response Information field contains the following Command Definition H Header 2 bytes I Identifier 2 bytes A Modem address 2 bytes C Command code 1 byte SB Sense Byte 1 byte D Data field Optional The length of this field is command dependent Header H Response Field The header field contains two subfields Length field This field is 1 byte long hexadecimal containing the number of bytes in the re
209. pecial Dialing Requirements in Appendix A of the 326X Series Modem User s Guide AT Command Option Setting Setting Description 30 0 The modem waits 30 seconds for a call to succeed 45 1 The modem waits 45 seconds for a call to succeed 60 2 The modem waits 60 seconds for a call to succeed 90 3 The modem waits 90 seconds for a call to succeed 180 4 The modem waits 180 seconds for a call to succeed S7 5 The modem waits the amount of time specified by S Register 7 for a call to succeed NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country 4X XC AT XC Error Correction Reliable Messages Cw La The AT XC Rel Msg command applies to the Reliable and Auto Reliable data transfer modes only The local modem can send a reliable message to the DTE along with the normal connect message if both modems negotiated a reliable error corrected connection AT Command Option Setting Setting Off 0 all Short 1 Long 2 Description If enabled the modem sends a connect message to the DTE but it does not send the reliable portion of the connect message A typical connect message appears as follows CONNECT 9600 The modem sends a reliable connect message to the DTE when a reliable connection is successful The message indicates the local DTE to modem data rate but no error correction or data c
210. ption The DTE controls data transmission with RTS The modem sets RTS high Use this setting if the DTE does not provide RTS If you are using Normal or Reliable data transfer mode and you are using RTS CTS flow control this setting is overridden and RTS behaves as if RTS Normal This setting applies to simulated half duplex applications and works only if the remote modem also supports RTS DCD signaling For this appli cation to work properly the DCD option at the remote site must be set to Remote Coordinate your setting with the remote site When the local DTE turns RTS on it forces DCD on at the remote modem The remote modem can only receive data during this period Once the local DTE drops RTS DCD at the remote modem follows The RemRST DCD option allows you to choose the type of RTS DCD signaling NOTE This setting functions as described only when the modem is in the Direct data transfer modem and not using the V 21 or Bell 103 modulation mode If the modem is using the V 21 or Bell 103 modulation mode or not using the Direct data transfer mode RTS behaves as if RTS Normal AT Commands 1 91 RT AT RT Auto Retrain The AT KRT Retrain command enables the auto retrain feature When enabled the pau e e modem retrains if the specified bit error rate is exceeded Enable Retrain for most applications because retrains allow the modem to compensate for changing line conditions NOTE When you set this feature to
211. r 1 AT Commands Options with AT Command Equivalents AT ZC Callback Feature AT ZD Dial Restriction AT amp Z I Entering Group Password AT ZP Tone AT XZR Remote Number Required AT ZS Simulated Ringback AT ZV Password Verification 2 28 Access Security Options Access Security Options The access security feature works as follows 1 Your 326X Series Modem receives a call 2 The calling modem must provide a DTMF password before the modems attempt a connection 3 The password is validated by the answer modem or is passed to the network manager for validation NOTE If the PW Verify command is set to Mngr AT KZV the network management system verifies the received password Although displayed at the modem this selection is not accessible by the front panel or AT ACU 4 If the password is valid the modem attempts a connection If the password is invalid your modem disconnects immediately A callback function is provided to act as a toll saving feature Upon verification of the calling modem s access security password your modem can call a number that is Provided by the calling modem Stored in one of nine memory locations in your modem or Provided by the network manager If the calling modem s password is valid your modem disconnects and calls the callback number By using the answer modem s callback function you need only stay on a long distance call long enough for the answer modem to verify
212. r 25 S Register 26 S Register 30 S Register 38 S Register 45 S Register 46 TEST OPT S Accept RDL LAL Busy Out MODULATION OPT S Line Modulation Auto Type Low Speed Max Rate Min Rate Fast Call Adaptive Rate Mode Clock Retrain Longspace PSTN Guard Tone B 2 Options and Displays Worksheet RESTORAL OPT S Restore LtoD DtoL Hold Dialine Ans Rest EC DC OPT S Mode Buffers EC DC Data Form Break Modem Flow Delay EC ID ACU OPT S ACU Select AT Form V 25 Form NoACU Form Default Dial Answer Async Echo Char Length V25 Char Sync Idle V25 Resp Parity AT Msg RsltCode RsltForm Con Msg Rel Msg LPDA2 Addr LPDA2 ID LPDA2 Det Call Progress Options and Displays Worksheet B 3 TERMINAL OPT S DTE Rate Flow TpDlyMin Speed Conver DTR RTS CTS Rts Cts Delay DCD RemRTS DCD DCD Loss Dis DSR Overspeed DTR Delay DTE Ct 140 DTE Ct 141 DTE Pin 25 Ext Select Ext Cntrl Inactivity TELCO OPT S Telco DL TX Level LL TX Level Line Compen Speaker Volume Netwrk Comp DIALING OPT S Pause Delay Dial Wait Dial Type Call Timeout Blind Dial Pulse Cycle Tone Length FP SECURITY Password Enable Disable B 4 Options and Displays Worksheet
213. r into your modem s telephone book before attempting to use this option See AT amp Z AT CN Enter Phone Numbers for information on entering phone numbers Option Setting AT Command Setting 1 9 1 9 Option Setting AT Command Setting The ATDS or AT DS Command To dial a stored telephone number using AT commands enter ATDS Or AT DS followed by the telephone book address number and a carriage return lt CR gt If you enter the ATDS or AT DS command without a number following it the modem dials the number stored in address 1 NOTE The ATDS and AT DS commands can also be entered in the format ATDS n or AT DS n The Front Panel To use the front panel to dial a telephone number stored in the modem s telephone book 1 Step across the Status Option Sets Dialing menu by pressing until you see Dial from n 2 Press the wr to select the telephone book address for the number you want to dial and press The modem dials the telephone number stored in the designated telephone book address ATE Asynchronous Echo E H L v C The ATE Async Echo command enables the modem to echo all commands received from an asynchronous DTE AT Command Option Setting Setting Off On all 0 Description The modem does not echo asynchronous commands to the DTE The modem echoes asynchronous commands to the DTE ATH Busy Out Test The ATH command enables you to initiate a Busy Out test Cw Xem AT
214. ract to affect the behavior of your modem For C Fast V32 and V32 and V 32 Uncoded Modulation Modes ATY Longspace On Off On The modem signals the remote modem to disconnect PSTN and disconnects when it receives space that exceeds 1 6 seconds in durations modem responds to the AT MD PSTN signal from the remote modem The modem signals the remote modem to disconnect PSTN The modem does not disconnect when it receives space that exceeds 1 6 seconds in duration The modem does respond to the AT MD PSTN signal from the remote modem ATK MD PSTN Off The modem disconnects when it receives space that exceeds 1 6 seconds in duration When terminating a call the modem sends continuous space for 4 seconds The modem does respond to the ATE MD PSTN signal from the remote modem The modem disconnects without signaling the remote modem and without sending continuous space for 4 seconds The modem does not disconnect when it receives space that exceeds 1 6 seconds in duration The modem does respond to the AT MD PSTN signal from the remote modem For V22 bis V 21 Bell 212 and Bell 103 Modulation Modes ATY Longspace On Off On The modem disconnects when it receives space that exceeds 1 6 seconds in duration When terminating a call the modem sends continuous space for 4 seconds The modem disconnects without signaling the remote modem and without sending continuous sp
215. rd default in parentheses underneath the setting The following sections describe industry standard AT commands that begin with AT NOTES 1 The conventions described for identifying front panel option settings and defaults apply to the 326X V 32 bis 326X FAST and 326XFAST SDC Modems Option settings that vary are clearly marked indicating to which product the default setting applies 2 Throughout this chapter AT commands are listed in table format In the AT Command Setting column the AT reference has been omitted however be sure to enter the entire AT command For example AT ZCO AT Commands 1 9 D DS DS ATD Dialing an Unstored Telephone Number DATA 9600 T D E Enter Then Dial The ATD Enter Then Dial command allows you to dial a telephone number up to 50 characters without storing it in your modem s telephone book The ATD Command You can dial a telephone number directly from your keyboard To do this enter the ATD command followed by the telephone number and a carriage return For example ATD5551234 lt CR gt The Front Panel See the Performing Numeric Entry section in Chapter 2 of this guide for details on how to use numeric entry ATDS AT DS Dialing a Stored Telephone Number DATA 9600 T D m Dial From 1 10 AT Commands The ATDS and AT KDS Dial From commands dial a number stored in one of the modem s nine telephone book addresses NOTE Enter a telephone numbe
216. re is used when the AT Form option is set to SyncData or the V25 Form option is set to AsynSync The delay time period allows you to switch an asynchronous terminal to a synchronous terminal AT Command Option Setting Setting Description S25 0 The modem waits the amount of time specified by all S Register 25 before examining DTR 10 sec 1 The modem waits 10 seconds before examining DTR 15 sec 2 The modem waits 15 seconds before examining DTR AT Commands 1 61 SX EC AT EC Error Correction v The ATXEC EC command determines which error correction protocol is used I NOTE This option does not apply when the 326XFAST SDC Modem is configured for synchronous data compression operation If both the local and remote 326XFAST SDC Modems are configured for SDC operation LAPM error correction with V 42 bis data compression only is used no other setting is available Option AT Command Setting Setting V 42 0 all LAPM 1 MNP 2 1 62 AT Commands Description The modems negotiate the use of LAPM or MNP error correction First the two modems attempt to negotiate using LAPM If unsuccessful they attempt to negotiate using MNP If still unsuccessful and the Mode option is set to Auto Reliable or Speed Dependent Auto Reliable the modems use normal mode If the Mode option is set to Reliable the modems disconnect The modems attempt to negotiate LAPM error correction In asynchronous applications if a connect
217. rectly or the modem cannot execute the command entered the modem responds with the Invalid response described in V 25 bis Responses under Addressed Mode in this chapter The data characters may be either 8 bit EBCDIC or 7 bit ASCII with a parity bit The character set used is selected through the V25 Char character set option The modem ignores all parity bits it receives however all message field characters in modem responses have parity bits Parity is selected through the Parity option The Parity and V25 Char options are in the ACU OPT S menu of the front panel display T 3 B trj SYN SYN STX RLN TX Modem SYN SYN STX LSN1 555 4231 ETB SYN SYN STX LSN2 555 3030 ETB SYN SYN STX LSN3 555 4011 ETX e ap e B a Synchronization Character STX Start of Text ETB End of Block Intermediate Response ETX End of Text Last Response Figure 3 4 Using the RLN Command in a Character Oriented Frame Format Synchronous Character Oriented Frame Format The synchronous character oriented frame is illustrated in Figure 3 4 All commands and indications are preceded with at least two synchronizing SYN characters followed by one start of text STX character All commands from the DTE must be followed by an end of text ETX character The modem uses an end of block ETB character for intermediate responses to a command and ETX character for the final response to a command If the modem recei
218. reset can change the value of the AT amp D DTR command setting from Reset to another setting amp D Option Setting 326X V 32 326XFAST 326XFAST AT Command bis Modem Modem SDC Modem Setting Description Tail Tail Tail 4 This setting is similar to 108 1 except that the 2 modem auto answers an incoming call even if DTR is off Use the Tail option if you plan to use the modem in a tail circuit to a high speed leased line modem or to other devices using DTR and DSR When DTR transitions from off to on the modem connects to the telephone line and dials if the Default Dial option is enabled Use the Tail option if you have an intelligent terminal which must dial out and answer calls without continually monitoring for a ringing signal 108 1 108 1 108 1 5 The DTR signal emulates the function of the Talk 3 Data at the Home position key on the modem front panel An off to on DTR transition instructs the modem to connect to the telephone line If the modem detects an incoming call the call is connected If the modem does not detect an incoming call and you have enabled the AT KDA Default Dial command the modem dials the number specified If the ATDA Default Dial command is disabled the modem refers to the AT MM Modulation Mode option in the MODULATION OPT S menu If set to answer the modem goes off hook and sends an answer back tone An on to off DTR transition disconnects the modem from the telephone line If DTR is lo
219. rmat The bit oriented frame is compatible with HDLC and SDLC synchronous protocol frame formats see Figure 3 2 All commands and indications are preceded with at least one flag F in an HDLC unnumbered information frame with the address A set to global The modem uses the control field poll final C bit to signal the final response to a given command The frame check sequence FCS indicates if there are errors in the frame C Control 03 or 13 FCS Frame Check Sequence Figure 3 2 Synchronous Bit Oriented Frame Format The RLN Request Listed Numbers command is used in Figure 3 3 to illustrate a typical exchange between the modem and DTE The 326X Series Modem uses the poll final bit in the control field to indicate multiple responses which it transmits The modem ignores the poll final bit in commands it receives The control field in intermediate responses contains a hexadecimal 03 the control field in the final response of a multiple response indication contains a hexadecimal 13 Terminal 7E FF 13 RLN FCS 7E Modem 7E FF 03 LSN1 555 4231 FCS 7E TE FF 03 LSN2 555 3030 FCS TE 7E FF 03 LSN3 555 3131 FCS 7E TE FF 13 LSN4 555 7066 FCS TE Legend 7E Fla FF Address Figure 3 3 Using the RLN Command in a Bit Oriented Frame Format Automatic Calling Interfaces 3 15 If the modem receives either a framing or FCS error it ignores the command and sends no indication to the DTE If a command is entered incor
220. rror If a system fault is detected during the modem self test an error message Message appears in the display immediately after the self test Handling Error Messages If the modem fails the automatic self test and displays an error message do the following 1 Record any error message displayed to assist in troubleshooting the modem 2 Power cycle the modem and again observe the front panel display NOTE If after power cycling the modem the modem displays 3260 3265 Ready it means that the earlier error message was probably caused by a temporary power line problem Some line problems do not affect modem operation If the modem continues to display an error message call the Motorola Customer Support Center or contact your nearest authorized Motorola distributor for assistance When the modem displays either 3260 3265 Initial or 3260 3265 Ready you can begin system testing If it becomes necessary to return your 326X Series Modem include a copy of the recorded error message along with other relevant information before sending the modem back to Motorola Testing Your Modem 4 3 System Testing 4 4 Testing Your Modem In addition to the automatic self test capability the 326X Series Modem features a built in test generator error detector and loopback circuitry to help you isolate problems System tests can be initiated in the following ways From the modem front panel By using AT commands from an atta
221. rs a call on the dial line while connected to the leased line Option AT Command Setting Setting Description LL Fail 0 When connected on the leased line the modem all answers an incoming call only if the leased line fails Always 1 A dial call is always answered As soon as the dial call is answered the leased line connection is dropped with auto answering the leased line is dropped after the correct number of rings If training on the dial line fails the modem returns to the leased line AT Commands 1 51 AY BD AT AY Auto Type v The ATX AY Auto Type command determines how the modem negotiates e e modulation modes with the calling modem if it is answering calls and one of the Auto modulation modes C Fast Auto V32bis Auto or Auto V32 is selected Option AT Command Setting Setting Description Codex 1 During answer back tone the modem attempts to CCITT all 0 AT BD Blind Dial negotiate a connection in the V 32 modulation mode After sending answer back tone the modem continues to attempt to negotiate a connection in the V 32 modulation mode If unsuccessful the modem tries to negotiate a connection in the V 22 bis modulation mode NOTE Use this setting if the calling modem is a Motorola 2264 or 2266 Modem with software revision 3 0 or below The modem operates in accordance with Annex A Automode to the V 32 bis specification During answer back tone the modem attempts to negotiate a
222. ru pepe Eb mnt COE en RED varia podre E 2 16 V23 bis Data POrmat e 2 17 INoAUL Data FOM ecnin tu chug ont pce atat Fa Rie ee aa c ea Etica 2 17 Character Riu P 2 18 N25 bis C Harecter Selec Doll aeu cciacker Diae eras Fees se GEM Eee Geste ud 2 18 Syne Idie M 2 18 Wid bis Respons og auos e tabu ipe Bev gn e om Ou vi Poe NM i ee eoe elc er pa T tac 2 19 NUR wr n E 2 19 LPDA2 Identibcat on Nunnbat scene erret io slats peto ped amides map canios 2 20 LPDAZ b c canini E yes eaves 2 20 Termal OPIS TT 2 20 Teko Opioaren A 2 23 Dial Lime Transmit Layel 41 cutie nre per RTA NE ESE IN EEE NER 2 24 Leased Line Transmit Leyel icicccrissscsvicss sisicaisinevendevensscssserecstiavesinvanescivs 2 24 Beenie CODUDUE arenaria A AE A 2 25 Pront Panel Security OpUOBS 2o iis pi ces propr bts an n e Him isa iced ds 2 26 MIA dictado dh DITo I LLENO M RT 2 27 ACCES SCOT OPO S icti bise eee tee ted reer ney coeren setter rte rete tnt ce 2 28 Group PW Emable Disable socis oec met puta rina 2 29 If the Answer Modem Is Not Using the Callback Feature 2 30 If the Calling Modem Is Providing the Callback Number 2 31 Using the Callback Feature with an Originate Only Modem 2 33 Manual Dialing and Callback DTMF Equivalencies 2 33 INED OLR TONING COPING Me E ana AA 2 34 lcs mb M
223. s Framing Rules A frame with a control or FCS field error is invalid and is ignored Each command and response is conveyed by a single frame The modem does not accept a new command from the DTE until a response to the previous command has been returned to the DTE If a command is valid and the modem executes it a positive response is returned to the DTE If the command is invalid or the modem cannot execute it a negative response containing an error code is returned to the DTE LPDA2 Dial Command The command code format is as follows Command Code Format 0x21 This command causes the modem to go off hook the modem to dial the number included in the data field of the command and all dial modifiers to be implemented Call progress is then dictated by the option mode selected The command can contain up to 58 bytes but the modem can only dial 50 characters Some of the dial modifiers which may be included in the command string would not be counted as part of the 50 dial characters LPDA2 specific dial modifiers may be inserted into the number dialed to implement special functions as described in Table 3 8 In leased line operation a dial command while on the leased line will cause the modem to initiate restoral If a dial command is received while the modem is in restoral an error response is returned to the DTE NOTE Any invalid characters not specified below force the command to be aborted and an error code is retur
224. s When the call timeout timer expires the modem continues to detect the ringback signal This sense byte is sent if the LPDA2 dial attempt is aborted while the modem is dialing The dial may be aborted in various ways including pressing the T D button or dropping the DTR signal This sense byte is sent only when the dial modifier OxAA is used in a dial string If the five seconds of silence is not detected by the modem this sense byte is returned to the DTE Dial Response Data Field When a sense byte other than 0x00 or 0x04 is sent in the response there is no response data field When a call attempt is successful or an invalid command code has been received the sense byte is sent in the response and a data field is included The format of this data field is as follows Bytes 0 1 Modem type OxYYYY Byte 2 Modem model code OxZZ Byte 3 Always 0 The 326X Series Modem allows you to select the modem type to be returned in the data field You can configure the modem type Y Y Y Y for 326x the default setting or 7855 The modem model code ZZ reflects the model for the appropriate modem type selected Use the LPDA2 ID option to make the modem type selection For modem type 7855 the model code is always 10 For modem type 326x the model code reflects the number of ports this is always 01 LPDA2 Disconnect Command The command code format is as follows Command Code Format 0x22 The Disconnect command instructs the modem to dr
225. s initiated from the front panel When the test terminates the screen displays No Carrier This test will run indefinitely if not programmed to terminate itself through this S Register 18 Testing Your Modem 4 13 Data Mode Pattern Test 4 14 Testing Your Modem Using internally generated test patterns to provide data the Data Mode Pattern test separately examines the inbound and outbound halves of the transmission path Data bit and block errors are recorded during the test and are displayed on the front panel when the test is completed Test may begin with or without a DTE DTE data is ignored during a Data Mode Pattern test IMPORTANT f operating in 326XFAST SDC mode refer to the 326XFAST Synchronous Data Compression Testing section earlier in this chapter for important testing considerations NOTE This test is not valid in the Bell 103 or V 21 modulation modes If you attempt to run this test in either of these modulation modes the modem responds with Test Denied As shown in Figure 4 5 each modem transmits a pattern to the other modem The Data Mode Pattern test can be started at the local and remote modems simultaneously Pattern Checker Pattern Checker Figure 4 5 Data Mode Pattern Test Before starting a Data Mode Pattern test make sure your modem has established a connection with the remote modem otherwise your modem will display Test
226. s not accept V 25 bis commands issue responses or CONNECT messages Direct Answering The modem signals an incoming call to the DTE on Circuit 125 Pin 22 When the DTR signal from the DTE is turned from off to on the modem connects to the line If there is an incoming call the modem answers the call When the DTR signal from the DTE is switched from on to off the modem disconnects from the line Direct Dialing When the DTE turns its DTR signal from off to on and there is no incoming call the modem connects to the line If the Default Dial option is enabled the modem dials the number that is stored in the selected address If the Default Dial option is disabled or there is no phone number stored in the selected address the modem connects to the line and negotiates a modulation mode based on the setting of the Mod option If the DTR signal from the DTE is switched from on to off the modem disconnects from the line If you set the DTR option to Tail the modem operates the same as if you have selected 108 1 The only difference is that the modem automatically answers incoming calls regardless of the DTR signal status Manual Answering and Dialing You may choose to dial and answer calls manually The procedures for this are described next 3 20 Automatic Calling Interfaces Manual Answering To configure your modem for manual answering use the following procedure 1 In the MODULATION OPT S menu set the Mode option to Answer
227. s the model for the appropriate modem type selected Use the LPDA2 ID option to make the modem type selection For modem type 7855 the model code is always 10 For modem type 326x the model code reflects the number of ports this is always 01 3 32 Automatic Calling Interfaces Using an External Auto Call Unit Bell 801C or Codex 2207 Some applications use external dialers such as the Bell 801C or Codex 2207 to establish calls Once an external dialer completes a call it passes control of the dial line to the modem via the MI MIC control leads on the DIAL LINE connector This application is supported in Canada and the United States only To configure your modem for 801C external dialing using the front panel keys do the following 1 Configure the modem for the desired option set as previously discussed 2 Set the DTR option in the TERMINAL OPT S category of the front panel display to 108 2 or High NOTE If DTR 108 2 the DTR signal from the DTE must be on before the modem can connect to the line On to Off transitions of the DTR signal from the DTE disconnect the modem from the line 3 Check with your system administrator on the AT Form Char Length Parity DTE Rate and Mod option settings to make certain they are correct for your application 4 Set the Default Dial option in the ACU OPT S category of the front panel display to Off 5 Modify any other options as required for your application 6 Display Save Changes n o
228. sict aae siaessaasouvwsieed 1 11 ATL Speaker Volume Laus erre oer eH nin En TiN menue H ERI IHREN E Eh ATE 1 11 FOE Ice 1 12 EXE EIE POUR NET E rnp etter tare crent 1 12 ALP AVI ATSEPT Dial Type ticcscccscesscsisaveiicansthiverctnecdbicionastiacnsaioaesoe 1 13 POC UR Crate o PP Tm 1 13 PI IRDuc4 i c T 1 14 ALT a ye HET 1 14 ATY Result Code POIL ossia mpi HR br DS IRI OD T em ie 1 14 ALX Call Progressi onmin neh irinin nonne ENNE ETIN een EREN eaten EEEN etna 1 15 ATY Longspace Disbonnect creto tope rtp PEE YU ri iarr oats 1 18 ATZ Selecting anid spon Sel anra e ni rtr tette epe oes trading 1 18 Pol Re COMMIS Mer 1 19 nI BLIT EDID i N enm Eres Eee Lo mee in acre et cer err CoL irre ERE Gens 1 19 PO TR duni Mec 1 20 ATAF UOSenidlixe Memory sic ede prie e ODE EISE EH IURE RN aa OR CEREREM EUR 1 22 ATG CORDIEO POUR neue iR HERE DDR OR UH Dein 1 22 Alec Display Modem DEus desescu tet Got rity Ense Ert p Sos Fa bz RU IY eoi 1 23 Al Sel Dial Line Jack Ty Pea enean tro EE Yap yet ede RES en s 1 24 ATLL mE Tp ces opua rede on Ecc ca e p M ESL eren o RE LUE 1 25 ZOANLCAT Data POIIE 2321s UL n E xr Ha IIa Han Hi 1 26 Upon 4 OE T 1 27 AIR Abe PIC TS Conto l 22i intente tian pr DERE POPE rU popa 1 28 ATAS AT Se MRI DSR Control uacua risteceail pao nia bep abun a otn su tpe 1 29 PM WORE a a cciscebisi A CUR GERI GR IRI 1 30 ATTI Ale TS Accepi BILL eani etin etre ERE enema 1 31 AT Commands 1 1
229. sing AT amp Y 1 47 using Power Up In 1 47 resetting to factory defaults using AT amp F 1 22 using Reinit Memory 1 22 selecting 1 18 options See front panel options originate only modem callback 2 33 Override Mode option 2 35 Overspeed option 1 80 P Parity option 1 90 Pass Thru option 2 36 password protection disabling 1 80 enabling 1 80 unlocking 1 81 passwords access security 2 29 and FP SECURITY menu 2 26 changing 1 82 entering access security group 1 101 forgot your password 2 27 front panel security changing 1 82 entering 1 82 unlocking password protection 1 81 Index 9 P Continued passwords remote access entering 1 101 verification 1 103 Pat 4 14 starting from the front panel 4 15 Pause Delay option 1 60 peer to peer restoral 2 11 phase jitter 1 41 phase roll 1 41 phase shift key modulation See PSK modulation physical characteristics specifications for 5 2 power requirements specifications for 5 4 Power Up In option 1 47 programming guide for V 25 bis ACU 3 13 PSK modulation with Bell 212 modulation mode 5 3 with V 22 bis modulation mode 5 3 with V 22 modulation mode 5 3 PSTN option 1 72 interaction with Longspace option 1 73 PSTN signaling 1 72 Pulse Cycle option 1 27 Q QAM with V 32 bis modulation mode 5 2 with V 32 modulation mode 5 3 Quadrature Amplitude Modulation See QAM quick checks guidelines for 4 2 R Ranging message 1 32 RDL 1 69 4 10 initiating via remote modem 1 31
230. sponse including itself and up to but not including the FCS field Key field This field is 1 byte long and must contain 0x50 Identifier Field I The identifier field is two bytes long with the following format Byte 0 bit 0 Always 1 bit 1 Always 0 bit 2 Always 1 Shows a response bit 3 0 The command has been correctly executed 1 The command has not been correctly executed The error code is reported in the sense byte bits 4 7 Always 0 Byte 1 Always 0 Automatic Calling Interfaces 3 25 Modem Address A This field contains two bytes The same value received in the command frame is used in the response frame Command Code C This field contains one byte The same value received in the command frame is used in the response frame Sense Byte SB The sense byte contains a return code that describes the results of the command operation The following values are applicable for all commands Other return codes are specific to individual commands and are defined under the Dial and Disconnect command descriptions in the next sections Sense Byte Return Codes Definition 0x00 Command was executed successfully 0x01 through 0x03 Reserved 0x04 An unsupported command code was received 0x05 0x07 Reserved 0x08 The contents of the command data field were not valid 0x09 through OxOF Reserved Data Field D The length and contents of the data field are command dependent 3 26 Automatic Calling Interface
231. starting from the front panel 4 10 starting with AT commands 4 11 RDL Pat 4 12 starting from the front panel 4 12 starting with AT command 4 13 receive level 1 41 Receive Throughput Status display 1 36 redialing using the Auto Redial option 1 61 reinitializing memory using AT amp F 1 22 using Reinit Memory option 1 22 Index 10 R Continued RELIABL 1 35 Reliable connection response 3 13 V 25 bis messages 3 13 Reliable data transfer mode 1 94 Reliable messages and AT XC 1 99 and the Rel Msg option 1 99 remote access 1 82 remote configuration aborting using the AT RC command 1 86 using the front panel 1 86 before you begin 2 43 failure to establish 1 84 initiating with a dial modem 1 84 initiating with a leased line modem 1 85 introduction 2 37 Restore 1 87 session aborting 1 83 from the front panel 2 38 initiating 1 83 terminating 1 83 using AT ACU 2 38 terminating 1 86 using AT ACU 2 38 using front panel 2 38 Remote Configuration menu 2 37 remote digital loopback pattern test See RDL Pat remote digital loopback test See RDL remote modem searching for leased line address 2 41 setting leased line address 2 40 remote number 1 102 Remote Number Required option 1 102 restoral and Option Set 4 2 10 automatic 2 10 dialing during 2 10 indications 2 9 initiating 1 87 peer to peer 2 11 terminating 1 87 restoral failure 2 12 RESTORAL OPT S menu 2 8 AT command equivalents 2 8 figure 2 8 restricted features under remo
232. stored number Answer an incoming call View the option settings on the front panel IMPORTANT Know your password before enabling the password function If you cannot remember your password the only way to regain access to all modem actions is to clear the modem s memory This procedure is described in AT PW Entering and Changing a Password in Chapter 1 AT Commands Once you reinitialize modem memory all settings are lost and you must reconfigure all option settings in the modem and reenter all stored phone numbers When you receive your modem from Motorola the password is set to four zeros 0000 and the password protection feature is disabled Unlocking the Modem If you know your password see Chapter 1 AT Commands for details on the AT kPN command If you should forget your password and need to unlock the modem you can regain access to all modem functions by following the procedure in this section Caution When you unlock the modem using this procedure all option settings and stored telephone numbers are deleted from the modem s memory Before using the modem you will need to reconfigure all option settings in the modem and reenter all stored phone numbers 1 Close Switch 4 on the modem s rear panel set it to the down position See Table 2 2 in Chapter 2 of the 326X Series Modem User s Guide for more details 2 In the Status Option Sets Dialing menu press until the modem displays Reinit Memory When you
233. t is associated with the received identification code This selection is not accessible from the front panel or AT ACU and is displayed only when selected by the network management system The answer modem performs the callback using the phone number stored at the specified phone number index provided by the remote user 1 9 If the remote device does not provide a callback index the modem attempts to establish a connection without hanging up or calling back if AT ZRO Rmt Num Rqrd Off is set X ZD ZI AT ZD Dial Restricted v ACCESSSECURITY DialR strct The AT kZD DialRstrct command defines dial command limitations AT Command Option Setting Setting Description Off 0 No dial restrictions exist all Lvli 1 The auto redial command is not allowed The A command is not allowed if the previous command was a dial command In both cases the modem reports an ERROR message to the DTE Lvl2 2 Lvl2 has the same functionality as Lv11 In addition only stored phone numbers may be dialed The ATD V 25bis CRN LPDA2 Hex 21 and the front panel Enter Then Dial options are not allowed AT ZI Enter Access Security Group Password v ACCESSSECURITY gt Tu Enter GroupP W The AT ZI Enter Group PW option allows you to enter the password that your modem uses for access security The maximum length of a password is 10 characters but you can use as few as one character ATXZI You can enter AT ZIx lt
234. t the remote site manually enter the address RMT CONFIG OPT S ww e I I gt I gt gt A B y SRCH RMT LL ADDR Figure 2 14 SET RMT LL ADDR Menu Once you have determined the remote modem s serial number using the procedure described in Before Setting or Searching for a Remote Modem s Leased Line Address in Chapter 1 AT Commands do the following to set its address 1 Establish a leased line connection with the remote modem at 7200 bps or greater 2 Display SET RMT LL ADDR 3 Press until the modem displays New Address xxx 2 40 Remote Configuration Options Remote Configuration Options 4 See Performing Numeric Entry at the end of this chapter for details on how to enter the modem s new address 5 Press until the modem displays Rmt Ser xxxxxxx 6 See Performing Numeric Entry at the end of this chapter for details on how to enter the modem s remote serial number 7 Press until the modem displays Rmt Nest Modem xx 8 If the remote modem is in a nest and it is on a dual modem nest card select A if itis Modem A on the modem dual nest card or B if it is Modem B on the card Select No if the remote modem is a standalone modem or a single modem nest card 9 Press p until the modem displays Enter to Set 10 Press If successful the modem displays New Address xxx where xxx is the address you just set If unsuccessful the modem displays Rmt Set Fai
235. te configuration control 2 38 R Continued result code responses None 3 12 V 25 bis 3 12 V 25 rate 3 12 VAL only 3 12 Result codes V 25 bis 3 11 result codes and the ATQ command 1 13 and the Rslt Code option 1 13 setting format with the ATV command 1 14 with the RsltForm option 1 14 V 25 bis 3 12 retrain starting from the front panel 4 19 starting with AT command 4 19 Retrain option 1 92 and dial restoral 2 12 retraining 1 12 1 41 ringback simulated 1 103 RMT CONFIG OPT S menu 2 37 figure 2 37 options with AT command equivalents 2 37 RmtAcc option 1 82 RTS and AT RS 1 91 EIA TIA signal status description 1 37 front panel option 1 91 RTS control 1 91 RTS CTS delay 1 60 RTS CTS Remote Signaling 1 96 S Save Changes option 1 45 saving changes 1 45 SDLC synchronous frame formats and 3 15 security front panel 2 26 changing passwords 1 82 entering passwords 1 82 forget your password 2 27 unlocking password protection 1 81 remote access description of 2 29 using callback 2 33 using DTMF tones with manual dialing 2 33 with manual dialing 2 33 S Continued Select Options option 1 18 self test handling errors 4 3 messages 4 3 starting 4 3 sense bytes error codes 3 30 serial number locating 2 44 Set Protection 1 80 SET RMT LL ADDR menu 2 40 figure 2 40 signal quality 1 41 signal to noise ratio 1 41 Sim Ring option 1 103 simulated ringback 1 103 speaker control 1 12 volume 1 11 Speaker option 1 12 spe
236. ted break handling all It passes the break to the remote site immediately and deletes all data from its buffers NOTE Destructive breaks reinitialize data compression tables for MNP 5 and V 42 bis Expedited 1 The modem uses nondestructive and expedited break handling It passes the break to the remote site immediately without deleting data from its buffers Standard 2 The modem uses standard break handling It passes the break to the remote site in sequence with any transmit data from its buffers AT CA Answer Originate Mode we HIBS The AT CA Mode command determines whether the modem operates as an answer or originating modem Use this option in manual answer manual dial leased line restoral or leased line applications where one modem is set to originate and the other to answer If you change this option during a connection it does not take effect until the next call All option settings are overridden when dialing or answering an incoming call NOTE With a leased line connection the change takes effect immediately Option AT Command Setting Setting Description Originate 0 Originate The modem operates as an originating modem in a 1 3 manual answer dial application Answer Answer The modem operates as an answer modem in a 2 4 manual answer dial application External 2 External The signal from the DTE on EIA TIA 232 D Pin 11 determines whether the modem is in answer or originate mode If the sign
237. ten Re onset piarista eoni red us aegis ook yeas ub abies abe out A a eee Modem Address Command Code Sense Byte SB Data Field D Framing Rules I BRNPMOCOR PARI acetates VINA COMM ol e MMC ROREM E E LPDAZ Dial Command ju eco iniiis nitin Lecta Fer A EE Soc CR ER ates Dial Command Sense Dytes iicet ot terr t Rec P Er pe RUE Dial Response Data Tielg 12 oat ce misst etis Ptacun robes Regan LPDA2 Discennect Command co sisssccsscivsssscanstljvevscssnessneceoosntsticensnvsowesibes Disconnect Command Sense Byle oe cnin ce erbe pese scie ute lucien Disconnect Response Data Field rt erts Using an External Auto Call Unit Bell 801C or Codex 2207 To Initiate a Call Te Tis iS C llo e irr EHE F EN Et Pe ere Ro pt Gen RU Ey Eod v Edda WWWN RR CO 1 10 Q0 O0 ON CLA LA CLA Q9 Q3 Q3 Q3 WWW CO UD CO CO CO WW WW WD O2 O2 O2 U9 O9 O9 O9 O2 b2 b2 b2 b2 b2 P2 P2 P2 WV 3 2 Automatic Calling Interfaces Introduction V 25 bis ACU Your 326X Series Modem supports three Automatic Calling Interfaces also commonly known as Automatic Calling Unit s ACU s AT ACU for asynchronous applications V 25 bis ACU for synchronous applications LPDA2 ACU for synchronous applications This chapter discusses operation of the V 25 bis and LPDA2 ACU s The AT ACU is discussed in detail in Chapter 5 Using the AT Automatic Calling Interface in the 326X Series Modem User s Guide This chapter also disc
238. ter in the string is a 4 bit value If a value is not specified or if the value is 0 use the Call Timeout option as described in Chapter 1 AT Commands This modifier is used to show the end of the dial string and is not required for proper operation Any data following this modifier is ignored Use the C at the end of the dial string to place the command message field on a byte boundary as required by the modem 3 28 Automatic Calling Interfaces Table 3 8 LPDA2 Dial Modifiers Continued LPDA2 Dial Modifiers Hex Value Definition OxD OxD This modifier instructs the modem to wait for a dial tone before continuing to dial digits It is inserted between dial digits when an intermediate dial tone is expected This modifier performs the same function as the S modifier described previously however this modifier may be placed in any position in the dial string while the S must be on a byte boundary OxF OxF This modifier is an alignment modifier It may be placed anywhere in the dial string to place the command message field on a byte boundary OxB OxB This modifier is an alignment modifier It may be placed anywhere in the dial string to place the command message field on a byte boundary OxAA This modifier causes the modem to look for one or more ringbacks followed by five seconds of silence within the delay time specified by the front panel Call Timeout option If five seconds of delay silence is detected the modem continues
239. that is displayed depends on which Call Progress option setting you have selected Table 3 7 Call Failure Responses Response Description CFIAB CFICB CFIET CFIFC CFINS CFINT CFIRT DLCxxx Call Failure Indication ABort Call The modem aborted a call attempt for one of the following reasons was pressed during dialing The modem did not detect a dial tone A character was received from the DTE during dialing asynchronous only Call Failure Indication DCE Busy The local modem detected an incoming ring after a dialing command was entered or a command was entered at the DTE during manual answering or dialing Call Failure Indication Engaged Tone The local modem detected a busy tone after dialing If you set the Call Progress option in the ACU OPT S menu of the front panel display to 0 1 or 2 the modem does not use the CFIET failure response Call Failure Indication Forbidden Call The number is on the forbidden number list The modem cannot dial the number as instructed The PTT may require the modem to place a number on a forbidden call list if a call to that number fails The modem cannot dial a number that is on the forbidden list until the power to the modem is turned off and then on again Call Failure Indication Number Not Stored You used the CRSa command to dial from a modem memory address that did not have a number stored in it Call Failure Indication No Tone No answer back t
240. the leased line qualification fails the leased line cannot be qualified after 21 seconds or if a retrain is initiated another attempt to qualify the leased line is made according to the time specified in the Dial to Leased option NOTE When operating with peer to peer or alternate destination restoral the Hold Dialine option should be set the same in both modems involved with restoral In peer to peer restoral two leased line modems are involved in restoral In alternate destination restoral the remote leased line modem and a local dial modem are involved in restoral Figures 1 2 A and 1 2 B illustrate examples of peer to peer and alternate destination restoral respectively Device A Device B Figure 1 2 A 326X Peer to Peer Restoral Device C x HD Device B Figure 1 2 B 326X Alternate Destination Restoral Option Setting Off all 1 min 2 min 3 min 4 min 5 min 4L AT Command Setting 0 Description The Hold Dialine option is disabled a dial modem configured for restoral disconnects from the dial line normally A leased line modem configured for restoral disconnects from the dial line as soon as it connects to the leased line A dial modem configured for restoral holds the dial line for 1 minute A leased line modem configured for restoral holds the dial line for 1 minute while testing the leased line A dial modem configured for restoral holds the dial line for 2 minutes A
241. the strength of the echo signal generated on the local loop i e between the local modem and the local CO This value is displayed only when the C Fast V 32 bis or V 32 modulation mode is being used Otherwise the displayed value is zero Measured in Hz from 0 0 to 9 4 Hz this is a measure of the frequency offset of the echo This value is displayed only when the C Fast V 32 bis or V 32 modulation mode is being used Otherwise the displayed value is zero It is the difference in the transmit and receive path s frequency offset NOTE If the value of the far end echo level parameter is 35 dB below its receive level Phase Roll has no meaning Equalizer Signal to Noise ratio displays the Signal To Noise Ratio SNR measured in decibels from 0 dBm to 38 dBm The SNR measures the signal strength compared to the signal dispersion caused by circuit noise Circuit noise is any random signal disturbances in a communications link such as electromagnetic interference which tend to degrade line performance This signal is measured after it has passed through the receiver s equalizer It is not the SNR of the telephone line since the equalizer reduces the effects of certain types of channel distortion Determination of a good or bad SNR varies depending on modulation mode and data rate in addition to one s definition of good and bad specifically which BER is acceptable for a specific application Signal Quality displays the relative quali
242. ting section earlier in this chapter for important testing considerations NOTES 1 For maximum reliability run the RDL LDL and RDL Pat tests at a data rate of 19 2 kbps or lower 2 This test is not valid in the Bell 103 or V 21 modulation modes If you attempt to run this test in either of these modulation modes the modem responds with Test Denied As shown in Figure 4 3 this test loops data from the local terminal through the system we Tx Rx Rx FrH 4 E Local Modem Remote Modem Figure 4 3 Remote Digital Loopback Test If your terminal supports Circuit 140 you can use Circuit 140 signaling to initiate this test To use Circuit 140 to initiate an RDL test enable the DTE Ct 140 option in the TERMINAL OPT S menu Once this option is enabled the DTE can initiate an RDL test by turning Circuit 140 from off to on Before starting an RDL test make sure your modem has established a connection with the remote modem otherwise your modem will display Test Denied when you attempt the test To run an RDL test 1 Establish a connection with the remote modem 2 Use the front panel keys to move through the TEST OPT S menu until the modem displays TEST End Test 3 Press yy until the modem displays TEST RDL 4 Press The modem displays TEST RDL 5 Press W twice to reach the home display The modem displays TEST data rate T D For example you may see TEST 9
243. tion DR Disconnect Reason Indicates reason for last disconnect or failed call 1 DTR dropped 2 ATH command issued 3 Remote modem disconnected 4 Manager request 5 Configuration change caused disconnect 6 Restoral Manager 7 End Restoral Manager 8 MI MIC signal transition to off 9 Talk Data at the Home position pushed 10 DTR end restoral 11 End Restoral 116 12 Offline test initiated 13 Training failure 14 Security failure Invalid Password 15 Security callback 16 End Restoral Auto 17 Error correction link 18 Already connected 19 Dial aborted 20 Busy tone detected 21 No dial tone detected 22 Longspace detected 23 Dial aborted due to an incoming call 24 DTR not in proper state 25 Number on Forbidden or Delayed list 26 Retrain threshold exceeded 27 Answer Originate mode changed Pin 11 28 No stored number to dial 29 Test in progress 30 Callback in progress Table 1 3 amp V xST Status Summary Line Continued Message Definition 31 FSK and synchronous data modes incompatible 32 Semicolon detected in dial string 33 Answer back tone detect timeout no ringback tone 34 Answer back tone detect timeout ringback tone detected 35 Answer back tone detect timeout no call progress 36 Answer back tone detect timeout no answer 37 Answer back tone detect timeout busy after ringback 38 Denied manager down 39 Error corr
244. tion Reliable Messages eene 1 99 nae FAAS he MUU BS bales s pis ceci ds Core ME bC Ue Gu Uu rti ta Pda LE S 1 100 PUL SED nl RES ete 12 inan deri etre bere PR 1 101 AT amp Z I Enter Access Security Group Password ess 1 101 ADEZP Select Tones with Access Security 5s vates etetr reb et Pietro pibe 1 102 ATSZE Remote Number Required 1ccocei cuite abi arn Fer ERE EE eiae 1 102 AT Z5 t unulated Empbdck iecopedeesci cen erbe I ED EET URS ERE dU 1 103 ATRAN Password Venn eatoni amp sceictniscco Lois eren beati beoe REPE abb c ENNA 1 103 vii Contents continued viii Chapter 2 Front Panel Operation OLEO LIONE hee ree Nee d sp PE M MEME MU MI D I Status Option Sets Dialing PTO UNG Secr teagan PE usas ETE ecn m EE jas n Niodulaton CIBDOBER ie egi eic E kel ma Eoo eas iCEd EA Restoral Options m Restoral Miata coss eoi kir God rir or hi ty leans Eeen il REA E EGU A EENE i Connguring for Dial ReslOFdl 5 2 2 rr viret sancerassvauacsieaeconissveentsioees Interpreting the DTR Option Sete i uie oie axons tene ru Fete mbR Fen oid huge Error Correction and Data Compression Options eene mH Sure ET PICU SLC CHOU M2s DIA POTD eoe da ease ecran n Galan tele area pd NoACU Data Portillo aaa MSR HS MLAB SUN agai cris un ceca sey cC nnn ennienni Fes enn Seesaw Cpu by uda V23 bis Character Selectioh csss
245. tion of allowable characters AA AT Commands The following sections describe Motorola enhanced AT commands which begin with AT AT AA Answer CX m The AT AA Answer command controls whether the modem answers calls automatically or manually Option AT Command Setting Setting Description Manual 0 An incoming call must be answered manually Ring 1 1 The modem automatically answers an incoming call after the first ring Ring 2 2 The modem automatically answers an incoming call after the second ring Ring 4 3 The modem automatically answers an incoming call after the fourth ring Ring 8 4 The modem automatically answers an incoming call after the eighth ring Using SO S The modem answers an incoming call according to the setting of S Register SO NOTE These settings are country specific Consult Appendix C Country Specific Information in the 326X Series Modem User s Guide for the settings that are valid in your country AT Commands 1 49 SAP AT AP Adaptive Rate we MODULATIONOPT S be Adaptive Rate 1 50 AT Commands The AT AP Adaptive Rate command determines whether the adaptive rate feature is used The Adaptive Rate option when enabled selects the optimum data rate on the first connection and then constantly monitors signal quality and changes speeds as necessary to optimize user data throughput Based on the signal quality the modem shifts speeds up or down to c
246. transmitted during this test NOTE Do not initiate loop tests while performing the diagnostic procedures in this section 2 Follow Steps 1 to 3 in the section above to verify the cable at a remote site 3 Once the cable at the remote site has been verified initiate a dial connection with the host site 4 If there are no errors in data transmission the cable at the host site is most likely appropriate for the application 5 If the transmitted and received messages are different the cable at the host site is most likely incorrect for the application Verify the cable length to the limit specified in Appendix B of the 326X Series Modem User s Guide Reduce the cable length or capacitance of the cable to the theoretical limit and retry Steps 1 to 3 If the same cable length is required it is recommended that a low capacitance type cable be used NOTE These tests should be done prior to a Local Analog Loopback LAL or Remote Digital Loopback RDL test when troubleshooting Testing Your Modem 4 21 Chapter 5 Specifications Contents MT SIM SERI IERI TAA CU UIS ITE ML UNO EET 5 2 Physical Characteristics d 5 2 Operating Mode Character sl E aii cossciccernmecssanettnsnsctie wns PELa b Reba DER bue iD 5 2 Telephone n Type M 5 2 PAST Modulation Mode eos eC PB HR INQUE sn EH MER ER EHE Ve OBEN EUH 5 2 Yoa pis Modulaton MoO E cari ce sects in DD EPI bI p biu eter c DD DR IM 5 2 Wo Modulatio
247. ty of the received signal 0 9 where Good 9 and Poor 0 Signal quality is a single representation of a variety of line impairments An approximate BER to SQ table follows independent of the data rate SQ lt 3 the bit error rate is approximately greater than worse than 102 SQ 3 the bit error rate is approximately 102 SQ 4 the bit error rate is approximately 10 4 SQ gt 4 the bit error rate is approximately less than better than 107 Error Probability displays the probability of an error in the data stream in percent Error probability which acts as a confirmation of line deterioration increases as the amount of distortion increases The percentage increases as the amount of noise and or distortion increases An error probability value between 096 and 2096 is considered good a value between 21 and 40 is considered fair and a value between 41 and 70 is representative of marginal line quality 1 44 AT Commands amp W AT amp W Save Changes Creating New Option Sets The AT amp W Save Changes command saves an option set that you have created in AE the modem s nonvolatile memory The first part of this section describes how to save Save Changes an option set using the AT amp W command the second part describes how to save an option set from your modem s front panel Option AT Command Setting Setting Description 1 0 1 Save as Option Set 1 all 2 2 Save as Option Set 2 3 3 Save as Option Set 3 4 4 Sa
248. ual answer 1 49 network management using Override mode 2 35 M Continued modem Continued originate only callback 2 33 power up 1 47 remote searching for leased line address 2 41 unlocking 2 27 modem ID displaying 1 23 modem status displaying 1 31 Modem Status Display long form 1 31 Modem Status Display option 1 31 modifiers for dialing 3 3 modulation choosing line type dial or leased 1 25 selecting modulation mode Auto V32 1 74 Bell 103 1 74 Bell 212 1 74 V 21 1 74 V 22 bis 1 74 V 32 1 74 V32 bis 1 74 V32 bis Auto 1 74 modulation mode V 32 bis 5 2 modulation modes 1 74 Bell 103 5 4 Bell 212 5 3 V2 5 4 V 22 5 3 V 22 bis 5 3 V 32 5 3 MODULATION OPT S menu 2 6 AT command equivalents 2 7 figure 2 6 Motorola Codex 2207 auto call unit use with 326x modems 3 33 N n Program Number 3 8 NC Address option 2 35 NC Port Rate option 2 36 near end echo 1 41 NETWK CNTL OPT S menu 2 34 figure 2 34 options 2 34 network compensation 1 78 network control address 2 35 N Continued network control port rate 2 36 network management using Override mode 2 35 NO CARRIER message 1 16 NO DIALTONE message 1 17 NoACU data format 2 17 NoACU Form option 2 17 NoACU option 2 17 NORMAL 1 35 Normal data transfer mode 1 94 numeric entry 2 45 procedure 2 45 O operating status messages See messages option sets and power up 1 47 customizing using AT amp W 1 45 using Save Changes 1 45 powering up in u
249. unning the diagnostics within this section the problem may be with your DTE or modem NOTE If your 326X Series Modem is installed at a host site refer to the second sec tion below for diagnostic information 1 Either enable the AT ACU if not already enabled with async echo set to on reinitializing the modem will also enable the AT ACU with async echo set to on Ensure that speed and parity of the modem and the DTE are identical 2 Send data to the modem from the DTE NOTE Do not substitute test equipment for the DTE as the DTE s receivers drivers are an integral element in this test 3 If echoed data from the modem as received by the DTE matches the transmitted message send the status screen AT ST lt CR gt command 4 If there are no errors in either of the previous tests the cable you selected is appropriate for your application 5 If the transmitted and received messages are different i e character or framing errors verify the cable length to the limit specified in Appendix B of the 326X Series Modem User s Guide Reduce the cable length or capacitance of the cable to the theoretical limit and retry the steps listed in this section If the same cable length is required it is recommended that a low capacitance type cable be used If the 326X Series Modem is installed at a host site perform the following steps 1 Set the Mode option AT SM EC DC OPT S category to Reliable Reliable mode ensures data is
250. uplex Bell 212 Modulation Mode Data Rate 1200 bps Baud Rate 600 baud Carrier Frequency Answer Modem 2400 Hz Originate Modem 1200 Hz Modulation Phase Shift Key modulation at 1200 bps Bell 212 compatible full duplex Specifications 5 3 V 21 Modulation Mode Data Rate 300 bps Baud Rate 300 baud Carrier Frequency Answer Modem 1750 Hz Originate Modem 1080 Hz Modulation Frequency Shift Keying CCITT V 21 compliant full duplex Bell 103 Modulation Mode Data Rate 300 bps Baud Rate 300 baud Carrier Frequency Answer Modem 2125 Hz Originate Modem 1170 Hz Modulation Frequency Shift Keying Bell 103 compatible full duplex Environmental Limits Operating Temperature Range 432 to 4122 F 0 to 4 50 C Storage Temperature A0 to 4 158 F 40 to 470 C Humidity 5 to 95 noncondensing Radiated Conducted Emissions FCC Part 15A compliant CISPR 22A compliant Shock and Vibrations In approved shipping container conforms to the requirements of the National Safe Transit Association Percipient Test Specification Primary Power Requirements 100 to 240 VAC nominal 90 to 264 VAC automatic adapting 47 to 63 Hz automatic adapting Single phase AC 13 4W input power Apparent power 0 014 kvA 5 4 Specifications Transmitter Output Level e FCC Programmable 0 dBm maximum 12 dBm minimum 1 dB e FCC Permissible 9 dBm maximum 40 1 dB e 2 Wire
251. usses using an External Auto Call Unit Bell 801C or Codex 2207 with the 326X Series Modem The 326X Series Modem supports a CCITT V 25 bis Auto Call Unit ACU for initiating calls from a DTE The V 25 bis ACU can be used with intelligent DTEs that communicate in either synchronous or asynchronous data formats When entering telephone numbers into modem memory or dialing directly from the modem s front panel you may need to add dial modifiers to your telephone numbers Some applications require dial modifiers to satisfy special dialing requirements Table 3 3 lists the dial modifiers used by the 326X Series Modem when operating in V 25 bis ACU applications Table 3 3 Dial Modifiers Modifier Function Description W Dial Wait Instructs the modem to stop and wait for a dial tone If the w modem does not detect a dial tone after a specified period it aborts the call The factory default for dial wait is country specific consult Appendix C of the 326X Series Modem User s Guide for additional information In the United States the default is two seconds You can change this inter val using the Dial Wait option Pause Delay When any of these modifiers are encountered in a dial string k or on the command line the modem pauses The factory default for the pause delay modifier is three seconds This default can be extended with the Pause Delay command i The comma modifier can be used as a command outside of the dial string
252. ut into a remote digital loopback test 5 The modem cannot be put into a remote digital loopback test AT amp V AT ST Modem Status Display we The AT amp V and AT kST Modem Status commands allow you to view via your con pmo P e e trol terminal modem status information in either long or short form using the AT ST and AT amp V commands AT Command Option Setting Setting DTE DCE 19 2 EC DC Tx kb 0 Rx kb 0 DCD RTS CTS DSR DTR AOP DLP ALP DR 0 TI 0 O D Display Modem Id CQMS Description Long Form The AT STO and AT amp V commands select the long form status snapshot display This display consists of several screens and provides a summary of Operating Status DTE DCE Rate Status Error correction Data Compression Status EIA TIA 232 D CCITT V 24 Signal Status Disconnect Reasons display the modem s software revision Display Modem ID and CQMS Parameter Status Also the long form snapshot summarizes the settings of all front panel options and their corresponding AT commands only the suffix of the AT command is given the AT is omitted nonconfiguration action AT commands and the setting of each S Register NOTE Tx kb 0 is displayed only for the 326XFAST SDC Modem Short Form The AT KST1 and AT amp V commands select the short form status snapshot display The short form display provides a summary of AT command settings and S Register values for a detailed discussion of S Registers
253. ve as Option Set 4 When using the AT command or the front panel to select options if you do not save your modifications the modem does not enter them into nonvolatile memory However the modem operates according to these modifications until you do one of the following Choose another option set using the Select Options feature the ATZ command or AT amp D3 command Reinitialize the modem s memory using the Reinit Memory option or the AT amp F command Power down the modem If you do want to save messages do not turn off modem power until the Save Completed message appears Any modifications that you make are not placed in nonvolatile memory until Save Completed appears The AT amp W Command The AT amp W command allows you to create customized option sets To create a customized option set using the AT amp W command 1 Using the ATZn command select the option set that most closely suits your application The option set number you want to modify is represented by the 66 99 n 2 Use the AT commands described in this chapter to change the setting of each option you want to modify For example to change RTS CTS delay from its delay time according to S Register 26 to a new setting of 15 ms enter AT DL1 lt CR gt The modem responds with OK AT Commands 1 45 amp W 3 Once you have made all the changes to create your option set enter the AT amp Wn command The n that you choose specifies
254. ves a block check character BCC it is ignored The modem does not use BCC characters in its responses If the modem receives either a framing or parity error it ignores the command and sends no indication to the DTE If a command is entered incorrectly or the modem cannot execute the command entered the modem responds with the Invalid response described in V 25 bis Responses under Addressed Mode in this chapter The data characters may be either 8 bit EBCDIC or 7 bit ASCII with a parity bit You select the character set used through the V25 Char character set option parity is selected through the Parity option The Parity and V25 Char options are in the ACU OPT S menu of the front panel display 3 16 Automatic Calling Interfaces V 25 bis Control Signaling in Addressed Mode The V 25 bis ACU uses V 24 Circuits 108 2 DTR Pin 20 106 CTS Pin 5 107 DSR Pin 6 109 DCD Pin 8 and 125 RL Pin 22 to signal the various states of call establishment The following sections describe this signaling in detail This description assumes that the RTS CTS DSR and DCD options in the TERMINAL OPT S menu of the front panel display are set to Normal Idle Condition Idle condition applies only if the DTR option in the modem is set to 108 2 When the modem is disconnected from the telephone line and the DTE has 108 2 DTR off the devices are idle If the modem detects an incoming call it signals the DTE on Circuit 125 RI
255. w the modem does not auto answer 108 2 108 2 108 2 6 When the modem is disconnected from the 2 3 2 3 telephone line and the DTE turns DTR on the modem responds to all V 25 bis and all AT commands When the DTE turns DTR off the modem does not respond to dialing and answering AT commands but responds to all other AT commands Also with DTR off the modem ignores all V 25 bis commands The DTR signal must remain on throughout the course of a connection An on to off DTR transition disconnects the modem from the telephone line If DTR is low the modem does not auto answer AT Commands 1 21 amp F amp G AT amp F Reinitialize Memory DATA 9600 T D eee The AT amp F Reinit Memory command is used to reset your modem to the factory default option settings The four factory default option sets are restored and all stored telephone numbers are deleted The AT amp F Command Enter AT amp F lt CR gt The modem front panel displays 326x Initial and the terminal displays OK The factory programmed option sets are now in place The Front Panel When you press the modem first asks you Reinit All Mem Be sure you want to reinitialize the modem s memory before you press again The modem displays 326x Initial indicating that the original factory programmed option sets are now in place AT amp G Guard Tone ww MODULATIONOPT S gt coe 1 22 AT Commands The AT amp G Guard Tone com
256. wering manually using V 25 bis ACU 3 21 AOP EIA TIA signal status description 1 37 Async Echo option 1 11 asynchronous echo 1 11 asynchronous frame formats V 25 bis 3 14 AT commands amp C DCD 1 19 amp C DCD Control 1 19 amp D and configuring for dial restoral 2 10 amp D DTR 1 20 amp D DTR Control 1 20 amp F Reinitialize Memory 1 22 amp F Reinitializing Memory 1 22 amp G Guard Tone 1 22 amp I Display Modem ID 1 23 amp J Dial Line Jack Types 1 24 amp L and configuring for dial restoral 2 10 amp L Line Type 1 25 amp M AT Data Format 1 26 amp M AT Form 1 26 amp P Pulse Cycle 1 27 amp R CTS 1 54 amp S DSR control 1 29 amp T Accept RDL 1 31 amp T Test 1 30 amp T4 Accept RDL 1 31 amp T5 Accept RDL 1 31 amp V Modem Status Display 1 31 amp W and configuring for dial restoral 2 12 amp W Save Changes 1 45 amp X Clock 1 47 amp Y Power Up 1 47 amp Y Power Up in Option Set 1 47 amp Z Enter Telephone Numbers 1 48 amp Z Entering Telephone Numbers 1 54 AA Answer 1 49 AD and configuring for dial restoral 2 11 AP Adaptive Rate 1 50 AS and configuring for dial restoral 2 10 AS Answer Rest 1 51 AY Auto Type 1 52 Index 1 A Continued A Continued AT commands Continued AT commands Continued BD Blind Dial 1 52 BK Break 1 53 CA and configuring for dial restoral 2 10 2 11 CA Answer Originate Mode 1 53 CM Connect Message 1 54 CT CTC control 1 28 DA and
257. x Rate 1 77 Minimum Rate 1 76 Mod 1 74 Mode 1 94 2 11 Modem Flow 1 74 Modem Status Display 1 31 NC Address 2 35 NC Port Rate 2 36 NoACU 2 17 Override Mode 2 35 Overspeed 1 80 Parity 1 90 Pass Thru 2 36 Password Verify 1 103 Pause Delay 1 60 Power Up In 1 47 PSTN 1 72 Pulse Cycle 1 27 Reinit Memory 1 22 F Continued front panel options Continued Rel Msg 1 99 Remote Number Required 1 102 Restore 1 87 Retrain 1 92 2 12 RmtAcc 1 82 Rslt Code 1 13 RsltForm 1 14 RTS CTS Delay 1 60 RTS CTS Remote Signaling 1 96 Save Changes 1 45 Select Options 1 18 Set Protection 1 81 SET RMT LL ADDR 2 40 settings 2 45 Sim Ring 1 103 Speaker 1 12 Speed Conversion 1 93 S Register 1 14 Sync Idle 2 18 Telco 1 24 Tone 1 102 Tone Length 1 98 V25 Char 2 18 V25 Form 2 17 V25 Resp 2 19 View Phone 1 78 Volume 1 11 FSK modulation with Bell 103 modulation mode 5 4 with V 21 modulation mode 5 4 G Group PW option 2 29 guard tone 1 22 H HDLC with synchronous frame formats 3 15 Hold Dialine option 1 66 and dial restoral 2 11 ID displaying 1 23 idle condition with V 25 bis 3 17 INC response V 25 bis 3 11 information field format and command LPDA2 3 23 Continued information field format and response LDP2A 3 25 Init Rmt Cnfg option 1 83 initiating remote configuration session 1 83 with a dial modem 1 83 with a leased line modem 1 85 restoral 1 87 internal transmitter timing 1 47 INV response V 25 bis 3
258. your password and read the callback number The answer modem then disconnects and calls you back Group PW Enable Disable The Group PW option determines if the modem is able to verify a received password when you have selected the PW VerifyzMngr AT KZV and the network management system is unable to perform the verification This option setting is not accessible from the front panel or AT ACU It is displayed for status purposes only The network management operator configures the option as needed Option Setting Description Disable The modem is not able to verify the password default Enable The modem is able to verify the password using its Group PW stored internally Access Security Options 2 29 Access Security Options If the Answer Modem Is Not Using the Callback Feature If the answer modem is not using the Callback Feature it is not necessary to provide the answer modem with a number to call back You must however still specify the correct password In the answer modem 1 Set PW Verify Intern AT KZV1 ACCESS SECURITY category 2 Enter the access group security password using the Enter Group PW option AT EZI ACCESS SECURITY category Refer to the AT gt ZI description in Chapter 1 AT Commands of this manual for details on how to enter an access group security password 3 Set the modem to answer incoming calls The modem will answer the call based on how the Answer option AT K AA is set ACU OPT

326X Series Modem Reference Guide

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