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Chapter 1 - Datatronics

1. Pulse dials with a make break ratio of 39 61 for USA Instructs the modem to operate in direct mode and function as an ordinary non MNP V42 modem Configuring the modem for ECDC operation with error correction and data compression enabled will result in better performance and higher speeds from your modem Page 7 The following two examples set the modem to auto reliable mode use CTS RTS flow control and enable ECDC extended response code sets without baud rate adjustment ATVO N3 Q3 V4 C1 Error correction and Data compressinare both enabled ATVJO N3 Q3 V4 C0 Error correction enabled but Data compression disabled For general PC users in normal applications the recommended Dialing Prefix is AT JO N3 Q3 V4 C1 To set the modem to auto reliable mode with a carriage return ASCII 13 as the fallback character the Dialing Prefix is AT C2 N3 Q3 V4 A 13 To set the modem to operate in MNP reliable mode and hang up when a MNP reliable link cannot be established the Dialing Prefixes are ATVO N2 Q3 V0 C1 Data compression enabled ATVO N2 Q3 V0 CO Data compression disabled 1 9 Getting Started Now you are ready to dial a bulletin board data base or remote computer and your modem will automatically establish a connection As soon as a connection is established you can 1 Read or send electronic mail 2 View the most up to date news or information 3 Upload or download computer programs 4 Transmit or
2. n 0 9 MNP block size 64 characters MNP block size 128 characters MNP block size 192 characters MNP block size 256 characters Transmit break n 0 9 default Bn Does not buffer data in auto reliable mode Buffer all data Does not buffer data switch to normal mode on A Disable DCE DCE port flow control DCE Flow control XON XOFF normal mode Disable DTE baud rate adjust Enable DTE baud rate adjust DTE DCE Break control n 0 5 default K5 Set to normal mode Set to direct mode DTE DCE N2 N3 N4 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Tn v0 V1 v2 V3 v4 x0 X1 An Bn C0 C1 EO E1 E2 HO H1 10 1 PL PQ Set to MNP reliable mode only Set auto reliable mode V42 to MNP Set to V42 reliable mode only Disable DTE flow control Bi directional XON XOFF flow control Uni directional control Bi directional control One way XON XOFF flow control One way CTS connect on flow control Two way CTS connect on flow control CTS RTS flow RTS CTS flow Inactivity timer 90 90 default 0min Disable MNP V42bis extended message Reliable DTE speed Reliable DCE speed Reliable and compression DTE speed Reliable and compression DCE speed Disable Xon Xoff pass through Enable XON XOFF pass through Auto reliable fallback character default A0 Maximum DCE speed default BO Disable data compression Enable data compression Disab
3. 5 84 Leased Line Retry Bn In leased line dialup backup operation command Bn determines the number of times n the modem attempts to establish a connection on a leased line 5 85 Multi Phone Backup M Command M determines the type of phone system connected to the modem M0 Disables multi phone backup M1 Enables multi phone backup 5 86 Modem Protocol V Command V adjusts the modem s speed V0 V 34 Auto V1 V FC Auto V2 V 32bis Auto V3 V 34 V FC V 32bis V4 V FC V 32bis V5 V 34 only V6 V FC only V7 V 32bis only Page 69 5 87 Multi Phone Redial Order Z Z Multi phone redial order set Z Multi phone redial order query For example AT N 3 Set redial times to 3 AT M1 Enables multi phone redial AT Z 426 Dials STN 4 2 and 6 ATDT 782 2456 If the line is busy the modem dials STN4 2 and 6 if STN 4 2 or 6 are busy the modem redials 782 2456 for 3 cycles Page 70 Chapter 6 DIAGNOSTIC TESTS There might be times when the modem does not seem to cooperate no matter what you do Because your communications system is made up of many links the source of the problem might be the modem your computer the telephone circuit the remote modem the modem cable or the remote computer However diagnostic tests can isolate system problems and eliminate time consuming guess work when communication failure or high error rates occur 6 1 Diagnostic Test Functions The fo
4. 1 Originate state D Leased Line Dialup Backup Timer S15 Range 0 255 Unit min Default 5 Bits Mapped S16 BitO 0 Disable Local Analog Loopback Test 1 Enable Local Analog Loopback Test amp T1 Bitl 0 Disable Local Digital Loopback Test 1 Enable Local Digital Loopback Test 141 Bit2 0 Disable Local Digital Loopback Test 1 Enable Local Digital Loopback Test amp T3 Bit3 0 Loopback state OFF 1 Loopback state in progress Bit4 0 Disable Remote Digital Loopback Test 1 Enable Remote Digital Loopback test amp T6 Bit5 0 Disable Remote Digital Loopback Selftest 1 Enable Remote Digital Loopback Selftest amp T7 Bit6 0 Enable Local Analog Loopback Test 1 Disable Local Analog Loopback Test amp T8 Bit7 0 Enable Remote Digital Loopback Test Page 81 1 Disable Remote Digital Loopback Test 140 Carrier Detect CD Timer S17 Range 0 255 Unit 0 1sec Default 10 Register S17 determines how long after CD off the auto retrain begin Test Timer S18 Range 0 255 Unit Second Default 0 Register S18 determines the length of a diagnostic test before termination The default 0 means the test timer is disabled Auto Redial Interval Time S19 Range 0 255 Unit sec Default 2 Bits Mapped S20 Bit 0 3 0 Try dialup redial times N Bit 4 7 2 Try leased line rehandshake times B Bits Mapped S21 Bit 0 RJ 11 41S 45S modular jack RJ12 12 13 modular jack DSR always ON amp S0 DSR reflects r
5. Lit when modem is set for auto answer Flashes when incoming rings are detected RL Reliable Link Lit when error correction mode is enabled Flashes when an error is detected RD Receive Data Flashes when modem is receiving data from a remote modem or when sending data to the local computer SD Send Data Flashes when the modem is sending data to a remote modem or when receiving data from the local computer CD Carrier Detected Lit when a remote modem carrier is detected OH Off Hook Lit when the modem is using the telephone line off hook Off when the modem is not using the line on hook 1 3 Modem Rear Panel Located on the modem rear panel are the power switch power socket volume control RS 232 connector and two modular jacks as shown in the schematic The power socket is labelled 9V or 12V AC optional and corresponds with the power supply unit packaged with your modem Never use a non specified power supply unit as it might damage your modem To turn on the modem toggle the power switch to ON Likewise to turn off the modem toggle the power switch to OFF Always turn your computer on prior to turning on your modem and turn off your modem prior to turning off your computer Page 2 The RS 232 connector on the modem rear panel corresponds to the RS 232 cable and connects the local computer to the modem It is a DB25F female and a RS 232 cable in pin assignment and electronic standards See the following secti
6. Page 16 2 11 SETUP Main Menu PROTOCOL Directory The PROTOCOL directory contains the following settings LINK MODE N COMPRESSION C MNP BLOCK A SEND ADP ODP BREAK CTL K DCE FLOW CTL G XON XOFF PASS X CONNECT CODE V QUICK RESET NORMAL DIRECT MNP RELIABLE V42 MNP AUTO V42 RELIABLE ON OFF 64 128 192 256 ON OFF x 0 5 ON OFF ON OFF DCE SPEED DTE EC DCE EC DTE EC COMP DCE EC COMP NORMAL ATZ AT amp F QUICK ATZ QUICK AT amp F QUICK ATZ AT amp F 2 12 SETUP Main Menu CALL BACK Directory The CALL BACK directory contains the following settings CB ACTIVE A CB TIME D SET CLOSE MSG G SET OPEN MSG O SET PASSWORD Wn SET PHONE NO Zn VIEW PASSWORD V0 VIEW PHONE NO V1 ENABLE DISABLE XXX Sec xx characters xx characters 0 9 xx characters or letters 0 9 xx characters 0 9 0 9 2 13 SETUP Main Menu REMOTE ACCESS Directory Page 17 The REMOTE ACCESS directory contains the following settings RA SEC CHANNEL ON OFF RA PASSWORD P XXXXXXXXX 2 14 SETUP Main Menu MISC Directory The MISC directory contains the following settings FB THRESHOLD 26400 24000 21600 19200 16800 14400 12000 9600 7200 4800 2400 not available yet SECURITY DTMF CONNECT E ENABLE DISABLE SET DTMF P XXXXXXX WAIT DTMF S48 X sec SET VAR A S0 XXXXXXXXXXXXXXX CHECK VAR A CO0 XXXXXXX
7. 14400 16800 19200 21600 24000 26400 28800 Command Bn sets the maximum modem port baud rate speed The default is BO which sets the maximum on line speed according to the serial port speed 5 78 Data Compression oC Command C enables or disables data compression MNP Class 5 amp V 42bis capability during a reliable link CO Disables data compression C1 Enables data compression both MNP Class 5 and V 42bis Page 67 5 79 Automatic Retrain E Command E determines if the modem automatically initials a retrain when telephone line quality is poor EO Disables automatic retrain capability E1 Enables automatic retrain When line quality is poor the modem attempts three times with same speed to re establish the connection for a total of six seconds before hanging up E2 Enables automatic retrain When line quality is poor the modem attempts three times with speed adjustment to re establish the connection for a total of six seconds before hanging up 5 80 DCE Speed H Command H either enables or disables fixed DCE speed HO0 Disables fixed DCE speed H1 Enables fixed DCE speed 5 81 Answer Tone Detection I Command I enables or disables answer tone detection 10 Enables answer tone detection 11 Disables answer tone detection 5 82 RX Line Level PL Command L reports the RX line level 5 83 Signal Quality Q Command Q reports signal quality S N Page 68
8. 4 CA 105 Request to Send computer gt modem 5 CB 106 Clear to Send computer modem 6 CC 107 Data Set Ready computer modem 7 AB 102 Signal Ground computer modem 8 CF 109 Carrier Detected computer modem 12 CI 112 Select Alternate Rate computer modem 15 DB 114 Transmit Clock computer modem 17 DD 115 Receive Clock computer modem 18 141 Loopback Maintenance computer modem 20 CD 108 Data Terminal Ready computer gt modem 21 CG 140 Local Loopback computer gt modem 22 CE 125 Ring Indicator computer modem 23 CI Select Alternate Rate computer modem 24 DA 113 Transmit Clock computer modem 25 142 Test Indicator computer modem Pin CI outputs on both pin 12 Bell 103 and pin 23 EIA RS 232 25 24 23 22 21 20 19 18 17 16 15 14 Page 97 Appendix D FAX COMMAND REFERENCE Appendix D explains individual fax commands and is designed for value added users who want to write fax communication software General users may skip this section Fax Auto Answer FAA This command instructs the faxmodem to auto answer in data mode or in fax mode FAA 0 Auto answers as a FCLASS type faxmodem FAA 1 Automatically determines whether to answer as a fax or data modem Service Class Indication FCLASS This command determines whether the faxmodem is in fax or data mode It also indicates the fax command set service class FCLASS 0 Data mode FCLASS 2 Class 2 mode FCLASS Inquires servi
9. ACA each time the modem is turned on or reset by ATZ To designate an SCP as the major SCP issue command amp Y followed by the SCP number You may load a selected SCP to ACA by issuing ATZ followed by the SCP number In this case however the selected SCP is used only in that particular session Once the modem is turned on or reset by ATZ the major SCP is still loaded Page 25 3 8 Active Configuration Area ACA The ACA is a portion of the random access memory RAM in your modem that holds the configuration settings which determine the modem s current operating characteristics When the modem is turned on or reset by command Z the ACA is loaded with the FDP from the modem firmware ROM and then overwritten by the major SCP from the NVRAM The commands you issue to modify the modem configuration actually changes the content of the ACA However once the modem is turned off all the settings in the ACA will vanish To save the current ACA configuration to a SCP for further use issue command amp W followed by the SCP number Issuing command amp VO will display the current major configuration profile the stored configuration profiles as well as the current speed data format parity and protocol 3 9 Stored Telephone Numbers STN STNs are the digits retained in the modem NVRAM to be used for dialing You may save frequently used telephone numbers passwords or credit card numbers in it Note that only digits can be stored
10. AT V42BIS ASY D AT DIRECT ASY A AT DIRECT ASY D AT NORMAL ASY A AT NORMAL SYN D AT DIRECT SYN A AT DIRECT ASY V25BIS SYN BSC V25BIS SYN HDLC V25BIS PWR 2W LEASED PWR 4W LEASED Disable guard tone Guard tone 550 Hz Guard tone 1800 Hz Dialup line 2W leased line 4W leased line Asynchronous mode Syne mode 1 asyn dial to syn connect Sync mode 2 dial STNO Sync mode 3 manual DTR or V D Pulse M B 39 61 USA Canada Pulse M B 33 67 UK HK amp M0 amp M1 amp M2 amp M3 CTS tracks RTS in sync mode amp R1 amp S0 amp S1 amp T0 amp T1 amp T3 amp T4 amp T5 amp T6 amp T7 amp T8 amp V0 amp V1 CTS always on in sync mode DSR always on DSR according to RS 232 specification Terminate any test in progress Local analog loopback test Local digital loopback test Grant RDL request Deny RDL request Remote digital loopback test Remote digital loopback with selftest Local analog loopback with selftest View ACP and SCP settings View STN amp W0 Write ACP to major SCP amp W255 Clear NVRAM amp Wn Write ACP to SCPn n 1 2 3 4 amp X0 amp X1 amp X2 amp Y1 amp Yn Internal Txx clock to pin 15 External Tx clock from pin 24 Slave Tx clock to pin 15 Assign SCP1 as major profile Assign SCPn as major profile n 2 3 4 amp Zn X Save phone number x to STNn Page 112 A0 Al A2 A3 Bn C0 C1 C2 GO G1 Jo Wi Kn NO N1
11. In addition it also selects to display the DCE or DTE speed VO Displays DCE speed but disables MNP V 42 extended result codes response codes 17 and higher V1 Displays DTE speed and enables MNP V 42 error correction response codes without specifying if the connection is with data compression or not The REl identifier means the modem is in reliable link error correction MNP Class 4 while the V 42 identifier means the modem is in reliable link error correction Page 65 V2 V3 V4 V 42 with or without data compression MNP Class 5 V 42bis The NOR identifier means the modem is in normal link Displays DCE speed and enables MNP V 42 error correction response codes without specifying if the connection is with data compression or not The REL identifier means the modem is in reliable link error correction MNP Class 4 while the V 42 identifier means the modem is in reliable link error correction V 42 with or without data compression MNP Class 5 V 42bis The NOR identifier means the modem is in normal link Displays DTE speed and enables MNP V 42 error correction response codes with data compression indicated REL COMP identifier means the modem is in MNP Classs 5 mode while the V 42BIS identifier means the modem is in V 42bis mode Displays DCE speed and enables MNP V 42 error correction response codes with data compression indicated The REL COMP identifier means the modem is in MNP Class 5
12. capability which automatically dials STNO through the connected dialup line when the leased line carrier is lost Thus a backup connection is automatically initiated if the leased line is disconnected AT Y2 AT YO ATS15 10 ATS13 200 ATN 3 AT B2 ATD or ATA Issue this command after connecting both the leased line and dial up line to the modem Issue this command to disable the dial up back up function whether the dial up line is connected or not Switches back to the leased line 10 minutes after establishing a connection through the dialup line and detects if a leased line connection can be established Functional only in dial mode Limits the number of times the modem switches between the leased line and dial up line to 200 times When the dial up line is busy the redial times does not exceed 3 times After the leased line is disconnected the number of retries does not exceed 2 times Executes the Dial or Answer commands 4 7 ITU T V 23 Operation In ITU T V 23 mode the modem operates at 1200 bps in one direction and 75 bps in another In many countries this protocol is mainly used for Videotex services including BTX and Minitel B2 The modem uses the V 23 backward channel transmits at Page 30 75 bps and receives at 1200 bps For Videotex service B3 The modem uses the V 23 main channel transmits at 1200 bps and receives at 75 bps For host side use With either user or host channels onc
13. command AT amp TO Page 75 The modem then lists the number of errors detected within the time interval A value of 000 means no errors and 255 means 255 or more errors 6 10 Local Analog Loopback with Selftest amp T8 In the local analog loopback selftest LALST the modem generates a test pattern to verify itself Issue either of the following command lines to initiate the test AT S18 0 amp T8 Test timer is disabled AT S18 30 amp T8 Test timer is set for 30 seconds The test begins after the modem sends a carriage return and line feed Test Pattern Transmitter Local Generator computer Telephone Line Error t Analog Loop Figure 6 5 Local Analog Loopback with Selftest amp T8 When the test is terminated the modem responds with the number of errors detected during the test A value of 000 means no errors and 255 means 255 or more errors Page 76 Appendix A MODEM REGISTERS Modem registers determine operation characteristics Appendix A describes each register individually except for registers which cannot be modified Registers in bold represent default settings Reading or Changing a Register To read the current content of a register issue command Sr To change the register use command Sr For example AT S7 Reads register S7 AT S7 150 Sets register S7 to 150 AT S0 S16 Reads registers SO and S16 Auto Answer Ring Number SO Range 0 255 Unit Ring Default 0 Register SO
14. in STN and other characters or symbols will be discarded To store a telephone number as an STN use commands amp Z0 through amp Z9 followed by and the telephone number To view STN issue command amp V1 To dial an STN issue S n or n n denoting the nth STN For example AT amp Z2 886 2 782 2456 Stores 88627822456 as STN2 ATDT 3 7 Dials STN3 followed by STN7 Page 26 Chapter 4 SPECIAL FUNCTIONS This chapter describes special modem operation functions and is designed to help users understand the modem in a greater detail 4 1 Speed Dialing Speed dialing lets you issue abbreviated dialing codes instead of whole telephone numbers and requires telephone numbers to be saved in STN To use speed dialing specify command S n or command n n 0 9 For example AT amp Z2 782 2456 Stores 782 2456 as STN2 AT DT S 2 Dials STN2 782 2456 AT DT 2 Dials STN2 782 2456 AT DT 886 2 2 Dials 886 2 STN2 782 2456 AT DT 886 2 S 2 Dials 886 2 STN2 782 2456 4 2 Swap Dialing Swap dialing automatically dials another telephone number when the first number is busy by specifying two numbers spaced by swap dialing command N When the modem goes to dial it dials the first number If the first specified number is busy the modem dials the second number For example ATX4DT7822456N7822591 The modem dials 782 2456 first if busy then disconnects and dials 782 2591 if the first number is busy ATX4DT S 2 N S 5 Spee
15. in normal or reliable link U1 Turns on serial port baud rate adjustment The modem automatically adjusts its serial port speed to match on line speed as a non MNP modem 5 70 Break Control Kn Command K determines how the modem reacts to a break signal received from the local computer or the remote system Upon receiving a break signal from the local computer in on line data state during a reliable or normal link the modem reacts as follows n Modem response in on line data state 0 2 4 Modem immediately enters command state but does Page 63 not send a break signal to the remote system 1 Modem clears its buffer and immediately sends a break signal to the remote system 3 Modem immediately sends a break signal to the remote system 5 Modem sends a break signal to the remote system in sequence with the data received from the serial port 5 71 Operation Modes N NO Selects normal mode N1 Selects direct mode N2 Selects MNP reliable mode only N3 Selects ECDC auto reliable mode V 42 MNP N4 Selects V 42 reliable mode only 5 72 Serial Port Flow Control Option Q Command Q determines which flow control method the modem uses Q0 Q1 Q2 Q3 Disables serial port flow control Uses bi directional XON XOFF hardware flow control An XOFF will stop transmission and an XON will resume it XON XOFF characters are generated by the modem with the same parity as data characters The
16. modem with SCP1 Z2 Resets the modem with SCP2 Z3 Resets the modem with SCP3 ZA Resets the modem with SCP4 5 28 Power On Auto Dial with STN amp An Range n 0 9 99 Default 99 disable Command amp An instructs the modem to automatically dial a STN denoted by n and saved with the appropriate amp Z command everytime the modem is turned on Page 50 5 29 CD Option amp C Command amp C determines how the modem reacts to the conditions of a CD Carrier Detect interchange circuit amp CO CD is always forced ON amp C1 Modem tracks the data carrier from the remote modem and initials CD accordingly 5 30 DTR Option amp D This command determines how the modem reacts to a DTR Data Terminal Ready on to off transition amp DO_ Instructs the modem to ignore a DTR amp D1 Instructs the modem to assume command state upon detecting a DTR on to off transition but maintains an active line connection amp D2 Instructs the modem to go on hook assume command state and disable auto answer upon detecting a DTR on to off transition The auto answer function can be re enabled by turning DTR on again amp D3 Instructs the modem to re initialize itself when it detects a DTR on to off transition The ACA is overwritten by the active SCP 5 31 Load Factory Default Profile amp F Commands amp FO through amp F12 load the factory default profile FDP into the modem s Active Configuration Area ACA The FDP is v
17. receive text messages or spread sheet data 5 Play interactive games with remote uses Or you can establish whatever kind of on line data communication link you wish Page 8 Chapter 2 LCD OPERATION AND FUNCTIONS This chapter describes the operation and functions of the modem LCD control panel Instructions for LCD control panel operation as well as the LCD main menu directories subdirectories and their contents are provided This chapter is designed to minimize the time required to learn the LCD control panel operation and get the modem on line 2 1 LCD Control Panel Operation The LCD control panel has four configuration buttons ESC escape Left Arrow Right Arrow and ENTER These configuration buttons are used to enter view configure and reconfigure the modem main menu directories subdirectories and their contents The modem LCD main menu is divided into four areas STATUS SETUP PROFILE and EXECUTE Moreover the four main menu areas contain directories and some contain subdirectories as well Follow the directions below to enter the LCD main menu directories subdirectories and their contents 1 Using the power switch located on the modem rear panel turn the modem on After the power has been turned on the LCD displays POWER ON INITIAL Then the modem immediately displays the current specified modem configuration status For example the LCD might display AUTO ASY V 42bis DL ORI IDLE This means
18. silence detection including adjustment of the silence detection period and sensitivity level when ADPCM compression is selected In this mode and when the sampling rate is 7 2 kHz the modem detects and reports DTMF dial tone and busy tone cadence as enabled by the VTD command Additionally the modem detects and reports inactivity periods of silence as enabled by the VSS command Voice Transmit Mode Voice Transmit Mode is entered when the DTE issues the VTX command in order to transmit voice data In this mode when the sampling rate is 7 2 kHz the modem continues to detect and report DTMF and calling tones if enabled by the VTD command This mode is typically used when playing back greeting messages or previously received recorded messages In this mode If the Voice Sub configuration is in operation voice decompression is provided by the ADPCM codes and the decompressed ADPCM voice data is then reconstituted into analog voice by the DAC at the original compression quantization sample per bits rate Optional silence interpolation is enabled if silence detection was selected for voice compression If the Audio Sub configuration is in operation PCM decoding is provided by the linear PCM decoder and the decode audio data is then reconstituted into analog voice by the DAC at the original 1 sample 8 bits or 1 sample 16 bits rate Page 105 AT Voice Command Summary Commnad MDL MFR REV TL VBS VBT VL
19. that the modem is currently in auto asynchronous V 42bis mode on a dedicated line being the originating modem and currently idle no connection Page 9 You can press the ESC button to view factory EPROM version LCD will display such as DATATRONICS 341 008 137 Press the ENTER button to view the LCD Main Menu The LCD will display lt MAIN MENU gt STATUS Remember that STATUS is the first possible directory users can view However you can not configure the contents of STATUS Pressing either the left or right arrow buttons on the LCD control panel allows users to choose either the STATUS SETUP PROFILE or EXECUTE Directories After choosing a directory first press ENTER then use LIFT RIGHT and ENTER button to view either that directory s contents subdirectory or both Continue to use the LEFT RIGHT or ENTER button to choose directory contents or subdirectory contents for configuration Once users are in a particular directory or subdirectory and viewing its contents pressing the ENTER button will assign configurations to the modem for operation At this point users should be able to hear a beep from the modem and see an asterisk next to the configuration representing that the configuration is now enabled Once you enter any particular directory subdirectory or the contents of either use the left and right arrow buttons to begin modem configuration In general if the contents of any directory or subdi
20. the modem to asynchronous mode to accept asynchronous commands amp M1 Sets the modem to synchronous mode 1 asynchronous dialing amp M2 Sets the modem to synchronous mode 2 DTR on to off transition can dial STNO immediately amp M3 Sets the modem to synchronous mode 3 DTR on to off transition starts handshaking directly 5 35 Pulse Dialing amp P Command amp P determines the pulse dialing method Note that command amp P is effective only when pulse dialing amp P0 Selects the make break ratio of 39 61 for modem use in U S A or Canada amp P1 Selects the make brake ratio of 33 67 for modem use in United Kingdom or Hong Kong 5 36 Asynchronous or Synchronous Mode amp Q Command amp Q has the same functions as command amp M See the command amp M section 5 37 CTS to RTS Option amp R Command amp R determines how the modem reacts to a CTS Request To Send Clear To Send signal Note that command amp R is effective only in synchronous mode amp RO CTS will follow the condition of RTS Page 53 amp R1 RTS is ignored and CTS is forced on 5 38 Data Set Ready DSR Option amp S Command amp S determines how the modem operates the DSR Data Set Ready signal Note that command amp S is effective only in synchronous mode amp S0 DSR is forced on amp S1 DSR operates according to EIA RS 232C specifications 5 39 Diagnostic Tests amp T Command amp T instructs the modem
21. to detect the off hook line status and apply a dial tone If the delay time is too short the modem will start dialing too early and the call will not go through because the central office did not receive the first few dialing Page 78 digits Register S6 is valid only when XO X1 or X3 is in effect If X2 or X4 are in effect dial tone detection is enabled and the modem will not blind dial Wait for Carrier After Dialing S7 Range 2 255 Unit sec Default 45 Register S7 determines how long the modem waits for a remote carrier signal after dialing or answering If a carrier is detected the modem goes on line Otherwise the modem disconnects and responds with NO CARRIER Pause Time for a Comma Dial Modifier S8 Range 0 255 Unit sec Default 2 Register S8 determines how long the modem pauses when a comma command is given For example ATDP9 782 2456 Instructs the modem to dial the PBX access number 9 and then pause for 2 seconds before dialing 782 2456 More than one comma command can be combined for a longer delay Carrier Detect Response Time S9 Range 1 255 Unit 0 1sec Default 6 Register S9 determines how long a carrier signal must continuously exist before it is recognized as a valid signal by the modem A longer S9 time gives the modem more time to distinguish the carrier signal from noise Loss of Carrier to Hang Up Delay S10 Page 79 Range 1 255 Unit 0 1sec Default 14 Registe
22. when the CLS 8 command is issued and may also be entered from Voice Receive Mode or Voice Transmit Mode Entry into Online Voice Command Mode is indicated to the DTE via the VCON message after whice AT commands can be entered without aborting the telephone line connection If the modem is the answerer it enters Online Voice Command Mode immediately after going off hook and can report instances of DTMF tones and calling tones to the DTE When this mode is entered as a result of going off hook with the D or A command VCON is aslways sent to the DTE after which the modem accepts commands If this mode is entered from Voice Transmit Mode the DTE has issued the lt DLE gt lt ETXs gt and the modem responds with VCON If this mode is entered from the Voice Receive Mode because of a key abort the modem issues the lt DLE gt lt ETX gt followed by VCON Voice Receive Mode Voice Receive Mode is entered when the DTE issues the VRX command in order to receive voice data This typically occurs when either recording a greeting message or when recording voice messages from a remote station In Voice Receive Mode voice samples from the modem analog to digital converter ADC are sent either to the ADPCM codes for compression or to the PCM coder for linear PCM coding and can then be read by the host AT commands control the voice sampling rate as well as codes bits per sample rates and can also be used to Page 104 select optional
23. 0 ms VR normal 20 ms VR fine 7 40 ms VR normal 40 ms VR fine To display the current FDCC parameter settings issue command FDCC Current Session Results FDIS Syntax FDIS VR RB WD LN DF EC BF ST This command determines how the faxmodem returns the negotiated T 30 parameters for the current session See the FDCC section for parameter definitions Command FDIS displays the help message of this command Begin or Continue Phase C Data Reception FDR This command initiates a transition to Phase C data reception and forces a transition in the control software from command parsing to background processing Note that you can only issue this command at the moment when negotiation is complete and upon entering Phase C Issuing this command at any other time results in an ERROR message Page 100 Begin Phase C Data Transmission FDT This command prefix begins Phase C data transmission and forces a transition in the control software from command parsing to background processing Note that you can only issue this command at the moment when negotiation is complete and upon entering Phase C Issuing this command at any other time results in an ERROR message Transmit Page Punctuation FET This command is used to punctuate page and document transmission after one or more FDT commands The following is a list of the parameters Value of n Definition 0 PPS MPS Another page same document 2 PP
24. 600 bps Connection at 7200 bps Connection at 19200 bps Connection at 14400 bps Connection at 38400 bps Connection at 57600 bps Connection at 12000 bps Appendix F Connection at 300 bps in reliable mode error correction only Connection at 600 bps in reliable mode error correction only Connection at 1200 bps in reliable mode error correction only Connection at 2400 bps in reliable mode error correction only Connection at 4800 bps in reliable mode error correction only Connection at 9600 bps in reliable mode error correction only Connection at 19200 bps in reliable mode error correction only Connection at 7200 bps in reliable mode error correction only Connection at 14400 bps in reliable mode error correction only Connection only Connection only Connection only Connection only Connection only Connection only Connection only Connection at 28800bps in reliable at 38400 bps in reliable at 57600 bps in reliable at 12000 bps in reliable at 16800 bps in reliable at 21600 bps in reliable at 24000 bps in reliable at 26400bps in reliable Page 108 mode error mode error mode error mode error mode error mode error mode error mode error correction correction correction correction correction correction correction correction 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4F 50 51 60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6F 70 71 The ab
25. ALST tests If an LAL test fails but an LALST passes the computer or path is probably at fault 3 To determine a failure due to a faulty telephone circuit perform LAL and RDLST tests to both the local modem and the remote modem If both modems pass an LAL test but fail an RDLST test the telephone circuit is probably at fault Modem problems most often arise from poor quality telephone lines It is advisable that your modem is on a good direct line without PBX Pie ie a e Page 72 6 3 Using the Test Timer S18 Register S18 determines all selftest duration s and the modem automatically ends tests and returns to command state when the S18 time expires The S18 default is zero to disable the test timer 6 4 Ending a Test amp TO A test can be terminated at any time by issuing the escape sequence causing the modem to enter command state and then issue AT amp TO Any command following amp TO in a command line is ignored 6 5 Local Analog Loopback Test amp T1 The local loopback test LAL verifies the path between the computer and the modem Everything you type on the keyboard during the test will be echoed by the modem back to the computer To initialize an LAL test issue AT amp T1 The test begins after the modem responds with a carriage return and a line feed Type any character string on the keyboard and the string should appear correctly on the screen If errors are found the mod
26. CDC reliable mode Connection at28800bps in ECDC reliable mode Connection at 300 bps in normal mode Connection at 600 bps in normal mode Connection at 1200 bps in normal mode Connection at 2400 bps in normal mode Connection at 4800 bps in normal mode Connection at 9600 bps in normal mode Connection at 19200 bps in normal mode Connection at 7200 bps in normal mode Connection at 14400 bps in normal mode Connection at 38400 bps in normal mode Connection at 57600 bps in normal mode Connection at 12000 bps in normal mode Connection at 16800 bps in normal mode Connection at 21600 bps in normal mode Connection at 24000 bps in normal mode Connection at 26400 bps in normal mode Connection at 28800 bps in normal mode V42bis is replaced with REL COMP Page 109 Response Set Selection Commands X0 through X4 combine to enable and disable various response codes In general applications select command X4 default to enable all response codes so the most specific response code messages are displayed If you plan to write your own software for special applications select the response set you require by issuing the appropriate X command The following table shows response codes 0 through 8 and how they are related to each X command The denotes that the response code is disabled for that X command The remaining response codes are enabled by commands X1 X2 X3 and Command Syntax and Response Co Descommand Syntax and Response Co Descomman
27. Chapter 1 UNPACKING AND INSTALLATION This chapter describes the procedures for unpacking and installing your modem Chapter 1 is designed to have normal PC users on line quickly 1 1 Unpacking the Modem The complete Discovery LCD Fax Audio modem package includes Discovery LCD Faxmodem unit User s manual Power supply unit Data and fax communication software RJ 11 to RJ 11 cable RJ 45 to Y terminal cable 6 by 2 terminal block Pan es is a el Carefully inspect the contents of the package for shipping damage If there is damage immediately repack the modem in the original packing material and contact your dealer 1 2 Modem Front Panel and LED Indicators Located on the modem front panel are the LCD LCD configuration buttons LCD Panel Lock switch the Voice Data switch and the LED indicators The modem LCD LCD configuration buttons Panel Lock switch and Voice Data switch are described in Chapter 2 The LED indicators display current modem operation and status as explained below MR Modem Ready Lit when modem is turned on Flashes when modem is in test mode TR Terminal Ready Lit when the computer or terminal is ready Page 1 RTS Request To Send Lit when local computer DTE requests to send data to local modem for transmission CTS Clear To Send Lit when local modem is ready to receive data from local computer DTE for transmission AA Auto Answer
28. Disable V25bis mode C0 Bitl 0 Enable V25bis asyncronous mode C1 1 Enable V25bis synchronous mode Bit2 0 Enable V25bis HDLC mode C3 1 Enable V25bis Bisynchronous mode C2 Bit 3 7 0 Reserved Delay to DTR S25 Range 0 255 Unit sec or 10 ms Default 5 Register S25 determines how long the modem waits in sync async mode from connection sequence completion to DTR status examination This delay allows the modem to be switched from an asynchronous data terminal to a synchronous data terminal without breaking the connection In this mode the unit register is in seconds and the default is 5 seconds In asynchronous and other synchronous modes a DTR change ON or OFF which lasts for less than the time defined by register S25 is ignored by the modem In these modes the unit register is 10 milliseconds and the default is 0 05 seconds Page 84 RTS to CTS Delay Interval S26 Range 0 255 Unit 10 ms Default 0 Register S26 determines how long the modem waits from an RTS OFF to ON transition detection to the time CTS is turned on This register is valid only in synchronous mode with amp RO in effect Bits Mapped S27 Bit 0 2 Bit 3 Bit 4 5 source Bit 6 7 Bits Mapped a O FP OWNeF CO UNEO W Asynchronous mode amp M0 Synchronous mode 1 amp M1 Synchronous mode 2 amp M2 Synchronous mode 3 amp M3 Normal speed pulse dialing Fast speed pulse dialing Local modem synchronous transmi
29. N N n N5 N5 n 00 O1 QO Q1 Sr Sr n vo X0 X1 X2 X3 X4 YO Swap dialing Wait for second dial tone Wait for silent answer Pause Pause Flash Return to command state Dial n 1th stored number Speaker always on after off hook M but off during dialing Display redial count Set redial count on busy Display redial count Set redial interval in 2sec Return to on line mode Return to on line mode with retrain Enable sending result code to DTE Disable sending result code to DTE Read register Sr Set register Sr to value n Digit result code Word result code Enable basic result code set Extended result code set X1 with dial tone detection X1 with busy tone detection X1 with busy and dial tone detection Disable long space and clear down Y1 Y2 Zn amp An amp C0 amp C1 amp D0 amp D1 amp D2 amp D3 amp F0 amp F1 amp F2 amp F3 amp F4 amp F5 amp F6 amp F7 amp F8 amp F9 amp F10 amp F11 amp F12 amp G0 amp G1 amp G2 amp LO amp L1 amp L2 amp M0 amp M1 amp M2 amp M3 amp P0 amp P1 amp Q0 amp Q1 amp Q2 amp Q3 amp R0 disconnect Enable long space disconnect Enable clear down disconnect Warm reset n 0 1 2 3 4 with profile n Power on auto dial default amp A99 to disable CD always true Actual CD Ignore DTR control Track DTR command mode Track DTR hang up Track DTR reset ASY D AT V42BIS ASY A
30. N MODE amp M CNG TONE TX CLOCK amp X DCD ON TIME S9 DCD OFF TIME S10 GUARD TONE amp G RLSD LEVEL AUTO RETRAIN E DISCONNECT Y AUTO 300 1200 2400 4800 7200 9600 12000 14400 16800 19200 21600 24000 26400 28800 V 34 AUTO V FC AUTO V 32BIS AUTO V 34 V FC V 32BIS V FC V 32BIS V 34 ONLY V FC ONLY V 32BIS ONLY ASYN SYNI SYN2 SYN3 DISABLE ENABLE INTERNAL FROM DTE FROM REMOTE xxx 100ms xxx 100ms DISABLE 550Hz 1800Hz 43 48dBm 33 38dBm 26 31dBm 16 21dBm DISABLE ENABLE WITH SPEED NORMAL LONG SPACE CLEAR DOWN 2 9 SETUP Main Menu COMMAND Directory The COMMAND directory contains the following settings MODE SELECT DATA FORMAT AT V25BIS DUMB ASYNC HDLC BISYNC MONOSYNC Page 15 DATA BITS PARITY STOP BIT COMMAND ECHO E RESULT CODE Q RESULT FORM V ESCAPE CHAR 82 ESCAPE GUARD S12 CR CHAR S3 LF CHAR S4 BS CHAR S5 5 6 7 8 NONE EVEN ODD SPACE 1 2 ON OFF ON OFF SHORT LONG XXX xxx 20ms XXX XXX XXX 2 10 SETUP Main Menu LINE Directory The LINE directory contains the following settings TYPE SELECT amp L DIAL METHOD Y BACKUP TIMER S15 BACKUP TIMES S13 BACKUP RETRY B RI OFF TIME PULSE M B amp P DIAL LINE 2W LEASED 4W LEASED NORMAL DIAL DL SIMU LL LL BACKUP DL Xxx min 1 255 xxx 0 225 xx 0 15 xx sec 0 15 US UK
31. Page 88 1 Multi phone system M1 Bit 7 0 Disable disconnect reset 1 Enable disconnect reset Set Auto Reliable Fallback Character S36 Default 0 0 lt n lt 127 Unit ASCII An Modem Port Link Speed S37 Default Range 0 17 0 Auto follow AT speed 1 Attempt connection at 1200 75 bps 2 Attempt connection at 300 bps 3 Attempt connection at 600 bps 4 Attempt connection at 1200 bps 5 Attempt connection at 2400 bps 6 Attempt connection at 4800 bps 7 Attempt connection at 7200 bps 8 Attempt connection at 9600 bps 9 Attempt connection at 12000 bps 10 Attempt connection at 14400 bps 11 Attempt connection at 16800 bps 12 Attempt connection at 19200 bps 13 Attempt connection at 21600 bps 14 Attempt connection at 24000 bps 15 Attempt connection at 28800 bps 16 Attempt connection at 31200 bps 17 Attempt connection at 33600 bps Bits Mapped S39 Bit 0 Bit 1 2 Disable data compresssion C0 Enable data compression C1 Disable auto retrain E0 Auto retrain on same speed E1 0 e Page 89 2 Auto retrain with speed change E2 3 Reserved Bit3 4 0 Neither direction 1 TX direction only 2 RX direction only 3 Both directions Bit 5 0 Enable answer tone check 1 Disable answer tone check Bit 6 0 Enable compromise equalizer 1 Disable compromise equalizer Bit 7 0 Disable detect phase 1 Enable detect phase Bits Mapped S40 Bit 0 0 Disable remote access E0 1 Enable remote acces
32. S VRX VSD VSP VSR VSS VTD VTS VTX Function A Answering in Voice Audio Mode D Dial command in Voice Audio Mode _ H Hang up in Voice Audio Mode Z Reset from Voice Audio Mode BDR Select baud rate CID Enable Caller ID detection and select reporting format CLS Select data fax or voice audio mode Identify manufacter Identify model Identify revision level Audio output transmit level Bits per sample Beep tone timer Voice line select Voice Receive Mode Silence detetion tuner Silence detection period Sampling rate selection Silence detection tuner DTMF tone reporting capability Generate tone signals Voice Transmit Mode Page 106 Result condes for Voice Operation VCON CONNECT VCON is sent when the modem is configured for voice audio CLS 8 or when after answering or originating a call the modem enters the Online Voice Command Mode for the first time Typically this is immediately after an off hook in answer mode and after ringback ceases in originate mode VCON is also sent when the DTE requests switch from Voice Transmit Mode to Online Voice Command Mode by issuing a lt DLE gt lt ETX gt to the modem or when the DTE requests a switch from Voice Receive Mode to Online Voice Command Mode via the key abort CONNECT is sent when switching from the Online Voice Command Mode to either Voice Receive Mode via the VRX command or to Voice Transmit Mode via the VTX command T
33. S EOP No more pages or documents Local ID String FLID Syntax FLID lt local ID string gt This command sets the local faxmodem ID The command syntax is FLID lt local ID string gt and the local ID string can be up to 20 printable ASCII characters ASCII value 32 to 127 Issue command FLID to display the current local faxmodem ID string Page 101 Request Model Identification FMDL This command instructs the faxmodem to send one or more lines of information text not exceeding 2048 characters used to identify the product Manufacturer Identification FMFR This command instructs the faxmodem to send one or more lines of information text not exceeding 2048 characters used to identify the manufacturer Minimum Phase C Speed FMINSP This command determines minimum Phase C speed the lowest negotiable speed for a session The following is a list of the definitions for the value of n Value of n Definition 0 2 400 bps ITU T V 27ter 1 4 800 bps ITU T V 27ter 2 7 200 bps ITU T V 29 or V 17 3 9 600 bps ITU T V 29 or V 17 4 12 000 bps ITU T V 17 5 14 400 bps ITU T V 17 Issue FMINSP to display the current n value Request Product Revision Identification FREV This command instructs the faxmodem to send one or more lines of information text not exceeding 2048 characters used to identify the version the revision level data or other pertinent information Fax Op
34. Swap Dialing N Inserting command N between two telephone numbers in a dial command line instructs the modem to swap dial the second specified number if the first number is busy For example AT X4 DT 782 2456 N 782 0305 The modem dials 782 2456 first if 782 2456 is busy it swap dials 782 0305 Page 42 To use swap dialing either X3 or X4 must be in effect so the modem can detect a busy signal Dial In Answer Reverse Mode R Attaching command R at the end of a dial command line instructs the modem to place a call and establish a connection in answer mode Reverse mode dialing is useful when calling an originate only modem Dial Stored Telephone Number S n or n Issuing dial modifier S n after dial command D instructs the modem to dial the stored telephone number STN previously saved with command amp Zn For example AT amp Z2 782 2456 Saves 782 2456 to STN2 AT DT S 2 o0r 2 Dials 782 2456 STN2 AT DT 886 2 S 2 or 2 Dials 886 2 782 2456 AT DT S 2 N 4 Dials STN2 if STN2 is busy STN4 is swap dialed When dial modifier S n is used the command buffer will count S n as three characters Also dial modifier S n must be preceded by dial command D DT or DP Pause Comma Command comma instructs the modem to wait for the time interval specified by register S8 before proceeding with the commands following it in the command line The duration of the pause is default at 2 seconds and is ch
35. XXXXXXXXXX SPK CONTROL M DISABLE OFF UNTIL CD ON ALWAYS ON OFF WHEN DIAL SPK VOLUME L OFF LOW MEDIUM HIGH DL TX LEVEL K0 xx dBm LL TX LEVEL KO xx dBm Page 18 2 15 PROFILE Main Menu The PROFILE Main Menu contains the following settings LOAD DEFAULT amp F 0 1 2 3 4 5 6 J 8 9 10 11 12 SET S REG LOAD PROFILE Z SAVE PROFILE amp W MAJOR DEFINE amp Y 2 16 EXECUTE Main Menu ASY D AT V42BIS ASY A AT V42BIS ASY D AT DIRECT ASY A AT DIRECT ASY D AT NORMAL ASY A AT NORMAL SYN D AT DIRECT SYN A AT DIRECT ASY V25BIS SYN BSC V25BIS SYN HDLC V25BIS PWR 2W LEASED PWR 4W LEASED SXX XXX 1 2 3 4 1 2 3 4 1 2 3 4 DIAL ANSWER TEST and HANG UP Directories 1 The DIAL directory contains the following settings DIAL A TEL D XXXXXXXXXXXXXXXX POWER ON DIAL amp An 0 1 2 3 4 5 6 7 8 9 Page 19 99 OFF EDIT A TEL amp Zn DIAL STORED DS MULTI PHONE M REDIAL ORDER Z TONE CHECK X WAIT FOR DIAL S6 PAUSE TIME S8 CALL TIME S7 REDIAL DELAY N5 REDIAL TIMES N DIAL TYPE DTMF DURING S11 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 ON OFF XXXXXXXXXX NONE DIAL TONE BUSY TONE DIAL BUSY TONE XXX Sec XXX Sec XXX Sec XXX 2sec XX TONE PULSE XXX MS 2 The ANSWER directory contains the followin
36. acter string on the keyboard and the string should appear correctly on the screen If errors are found either your computer your modem the remote modem or the telephone circuit is at fault You can initiate LAL tests on both local and remote sides to further isolate the Page 74 problem Local Modem Telephone Remote Modem Line Local Remote computer computer Receiver Transmitter Digital Loop Figure 6 3 Remote Digital Loopback Test amp T6 6 9 Remote Digital Loopback with Selftest amp T7 The remote digital loopback selftest RDLST verifies the local modem telephone circuit and remote modem In this test your modem sends a self generated test message to the remote modem The remote modem then loops the test message back to your modem and your modem compares the received string with the original message to verify the path To initiate the test issue either of the following command lines when on line in asynchronous command state AT S18 0 amp T7 Test timer is disabled AT S18 30 amp T7 Test timer is set for 30 seconds Local Modem Remote Modem Test Pattern Transmitter Transmitter Local Generator Remote computer computer Receiver Receiver Digital Loop Figure 6 4 Remote Digital Loopback with Selftest amp T7 The test begins after the modem sends a carriage return and line feed To terminate the test when S18 is set to zero use the escape sequence to bring the modem to command state and issue
37. anged by assigning a new value to register S8 You may use multiple commas in sequence for a longer pause time Wait For Silent Answer Page 43 Command instructs the modem to wait for the time specified by register S7 and followed by 5 seconds of continuous silence before proceeding to dial the following digits The modem will disconnect and respond with NO ANSWER if it fails to detect continuous silence or respond with BUSY if it detects a busy tone either X3 or X4 must be in effect Flash exclamation Command exclamation instructs the modem to go on hook for half a second and then off hook This command is used for call transferring Return to Command State semicolon Ending a dial command line with command semicolon instructs the modem to enter command state after dialing rather than going on line and into data state Other commands may follow command in the same command line 5 7 Command Character Echo E Command E enables or disables the sending of command characters back to the computer It is only effective in command mode EO Displays the echo of command characters It is used when command characters appear in double on your screen or when you use the modem with a host computer and do not want the command characters echoed El Enables the modem to echo command characters to your computer to view and verify the command line on the screen Page 44 5 8 On or Off Hook H Co
38. ay either be on line or off line When the modem is holding a connection with a remote modem or when it is in an analog loopback test it is on line Otherwise it is off line In data state the modem is a transparent receiving and sending device It interprets everything it receives except the escape sequence as data and conveys the data to the local computer or remote system 3 2 Escape Sequence The escape sequence instructs the modem to leave escape data state and enter command state without breaking the connection This is the only data string interpreted as a command when the modem is in data state After switching to command state users can issue further commands such as changing parameter settings etc To resume data state simply issue ATO The escape command in default is three consecutive characters In order for the modem to distinguish an escape command from data a certain duration of guard time should exist both prior to and after the three consecutive escape characters Therefore the escape sequence includes first a guard time second three consecutive escape characters and last of all a guard time The guard time in default of S12 is 1 second and is changed by assigning a different value to register 12 Likewise you may change the escape character by assigning an ASCII value in decimal for the new escape character to register S2 3 3 Modem Speeds During an on line communication path your modem is
39. ce class capability FCLASS Inquire service class identification Capability to Receive FCR This command inquires about receive function capability FCR 0 Indicates the faxmodem will not receive message data and is not able to poll a remote device FCR 1 Indicates the faxmodem can receive message data Page 98 Fax Capability Parameter FDCC Syntax FDCC VR RB WD LN DF EC BF ST This command determines the parameters required for fax commu nication operation The following is a list of definitions and values for each parameter VR Vertical Resolution 0 Normal mode 98 lines per inch 1 Fine mode 196 lines per inch BR Bit Rate 0 2 400 bps ITU T V 27ter 1 4 800 bps ITU T V 27ter 7 200 bps ITU T V 29 or V 17 9 600 bps ITU T V 29 or V 17 2 3 4 12 000 bpsITU T V 17 5 14 400 bpsITU T V 17 WD Page Width O 1 728 pixels in 215 mm LN Page Length 0 A4 size 297 mm 2 Unlimited length DF Data Compression Format 0 1 D modified Huffman EC Error Correction 0 Disable error correction BF Binary File Transfer 0 Disable binary file transfer Page 99 ST Scan Time Per Line 0 0 ms VR normal 0 ms VR fine 1 5 ms VR normal 5 ms VR fine 2 10 ms VR normal 5 ms VR fine 3 10ms VR normal 10 ms VR fine 4 20ms VR normal 10 ms VR fine 5 20ms VR normal 20 ms VR fine 6 4
40. d Syntax and Response Codes X4 but disabled by command X0 RESPONSE CODES XO Xl X2 X3 X4 0 OK XO Xl X2 X3 X4 1 CONNECT XO Xl X X3 X4 2 RING XO XI X X3 X4 3 NO CARRIER XO XI X2 X3 xX4 4 ERROR XO Xl X X X4 5 CONNECT 1200 XI X2 X3 X4 6 NO DIAL TONE X2 X4 7 BUSY X3 X4 8 NO ANSWER X2 X3 X4 Page 110 Prefix Repeat and Escape Commands A AT A Answer call immediately Appendix G Attention precedes all command lines except A and Re execute the last command in command buffer Escape characters guard time before and after Dial Commands and Dial Modifiers 0 9 A B C D wvangn 5 DTMF signal S11 255 Dial last number only in MNP Originate a call Dial the n stored number Touch tone dialing Pulse dialing Reverse dialing dial in answer mode Operation Commands An BO B1 B2 B3 E0 E1 HO H1 10 Il n2 K0 n LO L1 L2 L3 M0 M1 Auto Answer after n rings ITU T Bell auto Bell 103 121A 300 1200 ITU T V23 Tx75 1200 back channel ITU T V23 Tx1200 75 main channel Disable command echo Enable command echo Hang up the connection on hook Go off hook to make a call Modem product code ROM version Verify ROM checksum Carrier level control n dbm Speaker volume off Speaker volume low Speaker volume medium Speaker volume high Speaker always off Speaker on before connect Page 111 4 zZ m M2 M3
41. d Incoming Call Definition Limits Message Example SO and S1 can not equal 0 Successful response is VAL Failed response is INV 1 INC SO not equal to 0 S1 not equalto 0 DIC DTE command VAL 2 S0 0 DIC INV 3 SO not equal to 0 S1 not equal to 0 DIC INV Page 37 6 RLN Request List of Stored Telephone Number Definition Limits Message Example Similar to command amp V1 None Successful response is VAL Failed response is INVPV 1 RLN Lists all LSN 0 LSN 1 318 LSN 9 7822456 VAL 2 RLNI Lists STN1 LSN 1 318 VAL 3 RLN 10 Lists STNO INVPV Range 0 9 7 PRN Program Telephone Number Definition Limits Message Example Stored telephone number to STNn None Successful response is VAL Failed response is INVPS 1 PRN2 433 Sets STN2 433 VAL RLN 2 List STN2 LSN 2 433 VAL 2 PRN 2 Clears STN2 VAL RLN 2 LSN 2 Page 38 VAL 3 PRN 10 INVPV Range 0 9 Reponse Message Definitions The following are response messages followed by their definition INC VAL INVx AR WN INVCE INVMS INVPS INVPV CFUET CFINS CFICB CFIRT CFIAB CFINT CFIFC Like AT command ring message CNX Like AT command connect message Like AT command OK message x Like AT command error message CFIxx Like AT command ATD s error message Command Unknown Unexpected Error Message Syntax Err
42. d dialing can be combined Page 27 ATX4DT 2 N 5 with swap dialing Both command lines instruct the modem to dial STN2 first If STN2 is busy STN5 is swap dialed Note that to use swap dialing busy detection must be enabled by command X3 or X4 4 3 Redialing Your modem can automatically redial a call if the line is busy To do so issue the appropriate N and N5 commands For example AT X4 N 5 N5 15 DT 782 2456 Redials the number 782 2456 every 30 seconds and up to 5 times if the line is busy Note that command X3 or X4 should be issued to enable busy detection 4 4 Leased Line Operation In addition to dialup line operation the modem can be used on a leased line for dedicated communications between two destinations To set up a pair of modems for leased line communications follow the procedures below 1 Connect two modems on the 2 wire or 4 wire leased line and make sure the 2 wire or 4 wire leased line is connected to the modem phone jack Use the RJ 45 to Y connector cable supplied with your modem see Appendix B Leased line wires should be connected to the two or four outside wires 2 Make sure both modems are in smart mode so they can accept commands 3 Issue command amp L1 2 wire or amp L2 4 wire to both modems to select leased line operation 4 Issue command ATD to one modem to initial it for dialing mode Page 28 Issue command ATA to the other modem to initial it for answering mode The
43. determines the number of rings before the modem answers a call For example S0 0 Will not auto answer calls S0 3 Answers incoming calls after the third ring Ring Count S1 Register S1 counts the number of rings on the telephone line when the modem is set to auto answer Register S1 is cleared eight seconds after the last ring The default is 0 Page 77 Escape Character S2 Range 0 127 Unit ASCII Default 43 Register S2 stores the escape character ASCII decimal value Default value 43 is an ASCII Carriage Return Character S3 Range 0 127 Unit ASCII Default 13 Register S3 stores the carriage return character ASCII decimal value which terminates the command line and the response code Line Feed Character S4 Range 0 127 Unit ASCII Default 10 Register S4 stores the line feed character ASCII decimal value which follows a carriage return after a response code is sent You might need to set this register to a different value if a non standard DTE is used Backspace Character S5 Range 0 32 127 Unit ASCII Default 8 Register S5 stores the backspace character ASCII decimal value which is used as the backspace key for editing and as the echoed character to move the cursor backwards on the screen Wait Time Before Dialing S6 Range 2 255 Unit sec Default 2 Register S6 determines how long the modem waits after off hook before proceeding to dial This delay allows the central office
44. ds response codes in word form such as OK or CONNECT This form is easier for users to read 5 24 Wait For Second Dial Tone W Inserting command W in a dial command line causes the modem to wait for a three second continuous dial tone before proceeding to dial the digits following it The modem will respond with NO DIAL TONE if it fails to detect the tone or with BUSY if the line is busy 5 25 Response Set Xn Range 0 4 Default 4 Command Xn determines which response code is enabled or disabled XO Enables basic set of response codes 0 4 X1 Enables response codes 0 5 and 10 end X2 Enables response codes 0 6 and 8 end X3 Enables response codes 0 5 and 7 end X4 Enables all standard response codes Page 49 5 26 Clear Down Disconnect Y This command enables or disables the modem clear down disconnect feature YO Y1 Y2 5 27 Reset Disables clear down and long space disconnect Enables long space disconnect The modem hangs up when it receives 1 6 seconds of continuous break signal Also it sends a 4 second break signal before disconnecting when it receives command ATH or when it detects a DTR on to off transition if amp D2 option is selected Enables clear down disconnect Zn Command Zn resets the modem a with factory default profile FDP and a stored configuration profile SCP ZO Resets the modem with FDP and then with the major SCP if command amp Y is in effect Z1 Resets the
45. e the modem connects in V 23 mode it responds with CONNECT 1200 and data speed between the modem and computer is fixed at 1200bps in both directions The 75bps path is buffered by the modem and controlled by the RS 232C CTS Clear To Send signal to prevent overflow 4 8 Power On Auto Dialup After the power is turned on the modem can immediately dial the Nth telephone number set Note that telephone numbers must first be set up with command amp Zn before using this function AT amp A amp W When the power is turned on the modem dials the STN 0 telephone number set and saves it as the major profile AT amp A3 amp W When the power is turned on the modem dials the STN3 telephone number set and saves it as the major profile 4 9 Dialup Simulate Leased Line If the dial up line is disconnected due to the line circuit the modem can immediately establish a connection If the disconnection is due to human factors such as DTR disconnection or ATH then the modem will not attempt to establish a connection AT Y1 Enables the dialup simulate leased line function ATDxxx Executes the Dial command Page 31 4 10 Connection Password Security Your modem supports connection password security which prevents unauthorized connection to your modem El Enables connection password security and your modem waits for a password from the calling modem If the correct password is received the modem establishes a connection otherwise it resp
46. eal amp S1 0 1 Bit 1 0 1 Bit 2 0 CTS tracks RTS amp RO 1 0 1 2 3 CTS always ON amp R1 Ignore DTR amp D0 DTR ON to OFF causes command state amp D1 DTR ON to OFF causes hang up amp D2 DTR ON to OFF causes initialization amp D3 Bit 3 4 Page 82 Bit 5 Bit 6 7 Bits Mapped Ne Oo DCD always ON amp CO DCD reflects real amp C1 Disable special disconnect YO Enable long space disconnect Y1 Enable clear down disconnect Y2 S22 Bit 0 1 Bit 2 3 Bit 4 6 Bit 7 Bits Mapped O NFWNRK OD UNEO WNK CO Speaker volume off Speaker volume low Speaker volume medium Speaker volume high Disable speaker MO Speaker on until carrier detected M1 Speaker always on M2 M1 but speaker off during dialing M3 Short connect result code X0 Full connect result code X1 Wait for dial and check answer X2 Check busy and answer X3 Wait for dial check busy and answer X4 Reserved Make break ratio 39 61 amp PO Make break ratio 33 67 amp P1 23 Bit 0 Bit 2 Bit 3 Bit 4 5 Disable request from RDL amp T5 Enable request from RDL amp T4 Disable 140 active RDL Enable 140 active RDL Disable 142 active Enable 142 active Reserved Page 83 Bit 6 7 Guard tone disable amp G0 Guard tone 550 Hz amp G1 0 1 2 Guard tone 1800 Hz amp G2 3 Reserved Bits Mapped S24 BitO 0
47. efault 5 0 lt n lt 5 Kn Stream link interactive Block link file transfer Disable fixed DCE speed HO Enable fixed DCE speed H1 Normal Mode NO Direct mode N1 MNP mode N2 Auto reliable mode N3 LAPM mode N4 LAPM normal mode LAPM MNP mode MNP normal mode S46 Bit 0 2 Bit 3 Bit 4 6 Oo mO AU Disable flow control Q0 Enable bi directional XON XOFF flow control Q1 Enable uni directional hardware flow control Q2 Enable bi directional hardware flow control Q3 Enable uni directional XON XOFF flow control Q4 CTS off until connection and Q2 Q5 CTS off until connection and Q3 Q6 RI on after handshake RI off after handshake Disable V42 MNP result code VO Enable V42 MNP4 result code in DTE speed V1 Page 92 2 Enable V42 MNP4 result code in DCE speed V2 3 Enable V42bis MNPS result code in DTE speed V3 4 Enable V42bis MNPS5 result code in DCEspeed V4 5 Enable V42bis MNP5 debug code in DTE speed 6 Enable V42bis MNP5 debug code in DCE speed Bit 7 0 Process flow control character X0 1 Process flow control character and pass through to local or remote system X1 Inactivity Timer S47 Default 0 O lt n lt 255 Unit min Tn Wait for Connection Password S48 Range 0 255 Unit Second Default 15 Register S48 determines how many seconds the modem waits for a connection password after it answers a
48. el Lock switch press and hold the Panel Lock switch and the LCD will display PANEL LOCKING with a cursor crossing the LCD below the message until the panel is locked The LCD will then display DATATRONICS PANEL LOCKED Remove your finger from the Panel Lock switch and the LCD displays the original status message To unlock the panel press and hold the Panel Lock switch and the LCD will display PANEL UNLOCKING with a cursor crossing the LCD below the message until the panel is unlocked The LCD will then display DATATRONICS PANEL UNLOCKED Remove your finger from the Panel Lock switch and the LCD displays the original status message Page 11 2 3 Voice Data Switch The Voice Data switch on the modem control panel lets you switch between data link and voice link while on line without breaking on line status In data link you can transmit or receive data through the modem In voice link you can talk to the other party To use the Voice Data feature both modems need a telephone set connection To switch a call from data link to voice link 1 Request a talk link by typing a message on your keyboard such as Request for voice link pick up your phone 2 Lift your telephone handset and press your modem s Voice Data switch to VOICE You can now talk to the other party on the telephone connected to your modem as soon as they pick up their telephone handset connected to their modem As soon as the link is switched to talk lin
49. em computer or path might be at fault Local Computer Receiver Telephone Line Transmitter Analog Loop Figure 6 1 Local Digital Loopback Test 6 6 Local Digital Loopback Test amp T3 Page 73 The local digital loopback test LDL verifies both the modem and the telephone circuit This is primarily used to permit a modem that is not ITU T V 54 compatible to engage in an RDL test with your modem To initialize the test issue command AT amp T3 with your modem on line and in command state Your modem will loop the data it receives back to the remote station so the remote modem can perform an RDL test with your modem 6 7 Grant or Deny RDL Request amp T4 amp T5 Issue AT amp T4 as the default if you want the modem to accept an RDL test request from a remote modem Issue AT amp T5 to prohibit the modem from accepting an RDL test request Telephone Line Receiver Transmitter Local Remote computer computer Local Modem Remote Modem Transmitter Receiver Digital Loop Figure 6 2 Local Digital Loopback Test amp T3 6 8 Remote Digital Loopback Test amp T6 The remote digital loopback test RDL verifies the local computer and modem the telephone circuit and the remote modem Issue AT amp T6 to initiate the test Note that the remote modem should issue AT amp T4 to accept the digital loopback request The test begins after the modem has sent a carriage return and line feed Type any char
50. em discards the data If the waiting period 4 seconds expires or 200 characters have been buffered the modem falls back to normal mode and passes the buffered data to the local computer C2 Instructs the modem not to buffer data and immediately switch to normal mode upon receiving the auto reliable fallback character defined by command A Data received prior to the auto reliable fallback character will be discarded and the fallback character is passed on to the computer Note that this command is valid only in answer mode If the modem is in originate mode it ignores command Cn and will not buffer data during the MNP handshake period Page 62 5 68 Normal Link Flow Control G Command G enables or disables the XON XOFF flow control on the communications port in a normal link An XOFF signals the remote modem to stop sending data while an XON resumes the transmission G0 Disables XON XOFF flow control on modem s communications port G1 Enables flow control on modem s communications XON XOFF port In direct links no flow control is used In reliable links a special default scheme for flow control is used In both cases command Gn is ignored 5 69 Serial Port Baud Rate Adjustment J Command J turns the modem s serial port baud rate adjustment capability on or off JO Turns off serial port baud rate adjustment The serial port speed is fixed regardless of the on line speed This is used when the modem is
51. eration Response Codes Page 102 FCFR FCON FCSI FDCS FDIS FDTC FHNG FNSF FPTS FTSI Indicates confirmation to receive The reception of an acceptable TCF training burst and valid DCS signal from the remote modem are received Facsimile connection response Indicates connection with a fax machine Generated in response to an originate command or answer command Reports the called station s ID Reports DCS frame information The negotiated parameters for the current session are reported The sub parameters are also reported Reports DIS frame information The remote fax capability and intentions are reported The sub parameters are reported by command FDCS Reports DTC frame information The remote fax capability and intentions are reported The sub parameters are described by command FDCS Call termination Indicates that the call has been terminated Reports received non standard negotiation frames Receive Transmit page transfer status Reports a number representing the copy quality and related postpage messages The meanings of the numbers are listed as below 0 PPR Partial page error 1 MCF Page good 2 RTN Page bad retrain requested 3 RTP Page good retrain requested Reports the transmitting station s ID Page 103 Appendix E VOICE AUDIO COMMANDS Voice Audio Submodes Online Voice Command Mode Online Voice Command Mode is the default Voice submode entered
52. g settings MANUAL ANSWER A ON OFF RING TIMES S0 XXX 3 The TEST directory contains the following settings CLEAR TEST amp T0 LAL amp T1 LDL amp T3 RDL amp T6 RDLST amp T7 LALST amp T8 GRANT RDL PATTERN ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON amp T4 OFF amp T5 511 Page 20 RDL BY 140 ON OFF AL BY 141 ON OFF TEST TIMER S18 XXX sec 4 The HANG UP directory contains the following settings HANG UP ON OFF Page 21 Chapter 3 MODEM OPERATION This chapter describes modem operation states protocols speeds data formats error correction data compression and modem operation modes It is designed to help the user understand the modem in a greater detail 3 1 Command State and Data State During operation your modem is either in command state or data state The figure below shows the relationships between the two states and how to enter and abort from each Power Up Off Line Command H Fail to Connect State ATD E E DTR off to on ATA amp M2 amp M3 Auto Answer I BATH E DTR Loss Connecting i amp D2 amp D3 R W Connection Established On Line Command State Async mode only E Escape H Carrier Loss H DTR Loss amp D1 E DTR Loss amp D2 E DTR Loss amp D3 Fig 3 1 Command State and Data State n command state the modem interprets all characters it receives as Page 22 commands Command state m
53. his message is sent to the DTE to inform it that it may begin receiving or sending ADPCM or PCM data Recommendation During the software installing steps most of software will asks user to select the modem type Please do not run auto detection you may select modem type with Rockwell Based Voice Modem by manually This action s purpose is to select the appropriate voice commands for modem to process correctly Page 107 Code in Digit and Word Form E gt SA l EA eel a eA eA E A LSA d ES 27 28 29 2A 2B 2C 2D 2F 30 31 OK CONNECT RING NO CARRIER ERROR CONNECT 1200 NO DIAL TONE BUSY NO ANSWER CONNECT 2400 CONNECT 4800 CONNECT 9600 CONNECT 7200 CONNECT 19200 CONNECT 14400 CONNECT 38400 CONNECT 57600 CONNECT 12000 CONNECT 300 V42 CONNECT 600 V42 CONNECT 1200 V42 CONNECT 2400 V42 CONNECT 4800 V42 CONNECT 9600 V42 CONNECT 19200 V42 CONNECT 7200 V42 CONNECT 14400 V42 CONNECT 38400 V42 CONNECT 57600 V42 CONNECT 12000 V42 CONNECT 16800 V42 CONNECT21600 V42 CONNECT24000 V42 CONNECT 26400 V42 CONNECT28800 V42 Response Code Definition Command line executed successfully Connection at 300 bps or 1200 bps Incoming ring detected Remote carrier lost or not detected Command line error Connection at 1200 bps Dial tone not detected Busy signal detected 5 second silence not detected Connection at 2400 bps Connection at 4800 bps Connection at 9
54. iewed by issuing command amp V amp FO For asynchronous dialing V 42bis ECDC links amp F1 For asynchronous answering V 42bis ECDC links amp F2 For asynchronous answering direct links Page 51 amp F3 For asynchronous answering direct links amp F4 For asynchronous dialing normal links amp F5 For asynchronous answering normal links amp F6 For synchronous dial in links amp F7 For synchronous answering direct links amp F8 For synchronous V 25bis links amp F9 For synchronous V 25bis Bisync links amp F10 For synchronous V 25bis Data package links amp F11 For power on 2 wire leased line amp F12 For power on 4 wire leased line 5 32 Guard Tone amp G Command amp G selects the guard tone in ITU T V 22 and V 22bis modes and is effective only in these modes amp G0 Disables guard tone amp G1 Selects 550 Hz guard tone amp G2 Selects 1800 Hz guard tone 5 33 Leased Line or Dialup Line amp L Command amp L is issued according to the type of telephone line used with the modem amp LO Sets the modem for dialup line operation amp L1 Sets the modem for 2 wire leased line operation amp L2 Sets the modem for 4 wire leased line operation Page 52 5 34 Asynchronous or Synchronous Mode amp M Command amp M is issued to determine synchronous or asynchronous communications mode operation Note that this command has the same function as command amp Q amp M0 Sets
55. itable location for your modem includes 1 A reliable AC power source and a good quality telephone outlet that are not too far away from the computer 2 A location where the LED indicators and LCD are easy to monitor and where the LCD buttons on the front panel and the power switch on the rear panel are easy to reach Once you have chosen a proper location for your modem follow the procedures below to connect the hardware 1 Make sure both the modem and the computer are turned off 2 Connect the modem to the computer by plugging the DB 25M end of the RS 232 cable into the modem and plugging the other end of the cable into your computer s serial port Secure all the connector screws NOTE Verify and write down which serial port COMI to COM4 connects your modem to the computer as the port number is required during communications software installation Refer to the manual for your serial interface card or your terminal to find out how the port is set or configured 3 Using an appropriate cable connect the modem to the incoming telephone line through the LINE jack on the modem rear panel Be sure you tested the line quality as described in the previous section 4 Insert the cable plug end of the power adaptor into the power jack marked AC9V or AC12V optional on the modem rear panel and then plug the adaptor into a reliable power outlet Be sure to only use the adaptor that came with your modem Also check that the power
56. k your modem will issue a NO CARRIER message on the screen and the connection is bypassed to the telephone handset connected to your modem If the handset is not picked up before flipping the switch to VOICE the call is disconnected When the conversation ends follow the procedures below to resume data link 1 Inform the other party of your request to resume data link 2 Press the Voice Data switch to DATA and hang up your telephone handset 3 Have the other party press their Voice Data switch to DATA and hang up their handset upon hearing a high pitched tone from their modem If the remote modem does not have the same Voice Data function as your modem the other party should issue command ATX1D to force their modem to go into dialing mode and then hang up their handset Page 12 You may also use the modem as an auto dialing device First instruct the modem to dial the desired telephone number When you hear the remote party answer your call pick up your telephone handset press the Voice Data switch to VOICE and then talk to the other party 2 4 Main Menu and Directories The Modem Main Menu has four directories The directories are STATUS SETUP PROFILE and EXECUTE Refer to the following descriptions of the directories and their contents for moden status functions and control All modem commands and modem registers for any particular setting are indicated by bold type 2 5 STATUS Main Menu STATUS in the Main Men
57. le auto retrain Enable auto retrain with same speed Enable auto retrain with speed adjustment Disable fixed DCE speed Fix DCE speed Enable answer detection Disable answer detection Report RX line level Report signal quality S N Leased line retry n 0 15 M0 M1 V0 V1 V2 V3 V4 V5 V6 V7 Z Z A0 Al BO B1 Cn Dn E0 E1 F G I0 ell O Disable multi phone backup Enable multi phone backup V 34 auto V FC auto V 32bis auto V 34 V FC V 32bis only V FC V 32bis V 34 only V FC only V 32bis only Multi phone redial order set Multi phone redial order query Disable call back security Enable call back security Disable ring sound Enable ring sound Check VAR password Call back delay timer default D30 Disable connection password security Enable connection password security Display remote access and connection security password Set callback close message 75 char Set to smart mode Set to dumb mode Set callback open message 75 char P x Set H W security password Q0 S0 Vv0 V1 V2 Wn x Y0 yl Y2 View VAR buffer A Set VAR password View call back password View call back phone number View call back open close message Set call back password of set n into x Normal line Dialup simulate leased line Leased line dialup backup Zn Set call back phone backup CO Page 113 Disable V25bis C1 V25bis asy
58. llowing are the diagnostic tests your modem performs Note that amp T6 amp T7 and amp T3 are not applicable in Bell 103 CCITT V 21 or V 23 Local Analog Loopback Test LAL amp T1 Tests the communications path between the local modem and the local computer Local Digital Loopback Test LDL amp T3 Tests the communications path between the modem remote modem remote computer and telephone circuit Remote Digital Loopback Test RDL amp T6 Tests the communications path between the modem local computer remote modem and telephone circuit Remote Digital Loopback With Self Test RDLST amp T7 Tests the communications path between the modem remote modem and telephone circuit Local Analog Loopback With Self Test LALST amp T8 Tests the modem Page 71 6 2 Preliminary Diagnostic Guide A communications problem can stem from the telephone company circuit local computer remote computer modem or the remote modem Even if the communications path is in order communications software parameters may be set incorrectly The following are suggestions regarding diagnostic tests Note that all tests should be initiated when the modem is in asynchronous command state with both the computer and modem set to full duplex operation 1 To determine a failure due to the modem perform an LALST test This test verifies the modem itself 2 To determine a failure due to the computer perform LAL and L
59. located between the local computer and remote modem It has to communicate with both the remote modem and local computer through the telephone line and serial port cable respectively The speed over the telephone line at which your modem communicates Page 23 with remote modems is called the on line speed Since modems are Data Communication Equipment this is called the DCE speed On the other hand the speed over the serial port at which your modem communicates with the local computer is called the serial port speed Since computers are Data Terminal Equipment this is called the DTE speed 3 4 Smart and Dumb Mode Smart Dumb Mode configures the modem to either smart or dumb mode In smart mode the modem recognizes commands and echoes the response codes This is the modem s default setting and applies to general modem applications in dialup operations In dumb mode the modem ignores commands and refrains from sending response codes Dumb mode allows the modem to act as a dedicated auto answer modem or configures the modem for synchronous mode 2 or 3 operation Smart Dumb mode is configured through the LCD control panel in the SETUP Main Menu Command Directory under MODE SELECT or by issuing the proper I command To exit Dumb Mode and return to start mode by entering the SETUP Main Menu Command Directory under AT Enable AT you should hear a beep and see an before AT Now press the Voice Data button on the modem fron
60. ls The number of rings by which the modem goes off hook to answer is determined by register SO If a number follows command An the modem goes off hook to answer on the specified number of rings For example A3 Instructs the modem to auto answer on the third ring and then enter data state after a connection is successfully established 5 3 Attention Code AT Command AT clears the command buffer and informs the modem of your computer s transmission speed and data format Any command line except A and must start with an AT prefix and end with a carriage return Page 41 5 4 Repeat Last Command Al Command A instructs the modem to re execute the last command line stored in the command buffer This is the only command that does not require an AT prefix and carriage return 5 5 Bell or ITU T Standard B Command B selects the following communications protocols BO Selects ITU T Bell auto protocol used in most countries around the world Bl Selects Bell protocol used mainly in U S A and Canada B2 Selects ITU T V 23 Back Channel B3 Selects ITU T V 23 Main Channel 5 6 Dial In Originate Mode D Command D instructs the modem to dial the number following it and enter data state after a connection is established The number following command D may include the digits 0 through 9 dial modifiers A B C D N P T R S S n W the symbols comma exclamation semicolon and n
61. mmand H instructs the modem to go off hook use the telephone line or go on hook hang up HO Modem goes on hook H1 Modem goes off hook 5 9 Identification I Command I allows the modem s product code and firmware version to be checked and executes firmware tests 10 Displays the modem s product code Part I Il Displays the checksum code of the modem s firmware ROM in ASCII digits followed by a carriage return and line feed 12 Executes the modem s checksum test and sends an OK or ERROR response code 5 10 TX Level K0 n Range n 0 15 default 10 Command KO n determines the carrier level control n dbm TX level setting Leased line TX level 0 31dBm Dial line TX level 0 15dBm 5 11 Speaker Volume L Command L adjusts the modem speaker volume for call progress monitoring When the speaker is turned on LO Selects off speaker volume Page 45 L1 Selects low speaker volume L2 Selects medium speaker volume L3 Selects maximum speaker volume 5 12 Speaker On or Off M Command M turns the modem s speaker on or off for call progress monitoring MO Turns the speaker off at all times M1 Turns the speaker on until a connection is established M2 Turns the speaker on at all times even after a connection is established M3 Turns the speaker on until a carrier is detected but turns the speaker off when the modem is dialing 5 13 Redial Times N n Range n 0 15 Unit Time
62. mode while the V 42BIS identifier means the modem is in V 42bis mode 5 75 _XON XOFF Pass Through X Command X determines whether the modem passes the XON XOFF control characters it receives to the local computer or to the remote modem to further process the characters Note that command X is valid only in normal or reliable modes Note that data is lost if data transmission from the remote system starts before the modem is ready to receive it X0 Disables XON XOFF pass through if flow control is enabled by command Q1 DTE side or G1 modem side If flow control is disabled the XON XOFF characters are always sent as regular data Page 66 X1 Enables the XON XOFF characters pass through to the local computer or the remote system 5 76 Auto Reliable Fallback Character AN Range 0 127 Units ASCII Default 0 Command An defines the ASCII character to be recognized as the auto reliable fallback character during the initial waiting period when the modem auto answers a call For example A13 Defines the carriage return ASCII 13 as the auto reliable fallback character When a carriage return is received during the initial waiting period the modem immediately goes into normal mode The auto reliable fallback character is recognized only when the modem answers a call in auto reliable N3 mode and C2 is in effect 5 77 Maximum Port Baud Rate Bn n 0 300 600 1200 2400 4800 7200 9600 12000
63. n gt lt VPO gt then lt VPO gt new password 5 58 View Call Back Settings Vn Command V allows you to view and check passwords messages and telephone numbers stored in the modem memory V0 View call back security password dictionary V1 View call back security telephone directory V2 View call back security opening closing message 5 59 Set Call Back Password Wn x n 0 9 x up to 10 numbers or letters Wnex sets the call back password of set n into x 5 60 Line Selection Y Page 59 Command Y selects modem telephone line operation Y0 Selects normal line operation Y1 Selects dial up simulate leased line operation Y2 Selects leased line backup dialup operation 5 61 Set Call Back Telephone Number Zn n 0 9 String can contain up to 49 dial modifiers To set the call back telephone number issue command Zn lt dial modifier string gt 5 62 V25bis Operation Modes C Command C determines V25bis operation modes C0 Disables V25bis operation C1 Enables V25bis asynchronous operation C2 Enables V25bis bi synchronous operation C3 V25bis HDLC operation Page 60 5 63 Remote Access Operation E Command E enables or disables RA operation E0 Disables RA operation E1 Enables RA operation 5 64 Set Remote Access Password P Command P sets an RA password which is required to establish an RA link No password is set at the factory Please note the following before se
64. n incoming call If the password is not received during this period the modem will hang up Redial Limit S49 Range 0 15 Default 10 Unit Times Dialup Line TX Level S50 Range 0 15 Default 1 Unit dBm Page 93 Leased Line TX Level S51 Range 0 31 Default 1 Unit dBm Bits Mapped 52 Default 0 Bit0 7 0 Auto speed 1 Others the same as register S28 Bits Mapped S53 Bits 0 3 8 RI reset timer Bit 4 0 Disable V25 calling tone 1 Enable V25 calling tone Bit 5 0 Disable T30 calling tone 1 Enable T30 calling tone Bit6 7 0 Reserved Bits Mapped S54 Default 0 Bit 0 2 0 V 34 auto mode V0 1 V FC auto mode V1 3 V 32bis auto mode V2 4 V 34 V FC V 32bis V3 5 V FC V 32bis V4 6 V 34 only V5 7 V FC only V6 8 V 32bis only V7 Bit3 7 0 Reserved Page 94 Appendix B MODULAR JACK WIRING DIAGRAM To Other Equipment JACK PLUG Fig B 1 RJ 11 JM8 Modular Jack Wiring Diagram Page 95 CONNECTIONS Phone Line Connect Pin 4 amp Pin 5 2 Wire Leased Line Connect Pin 1 amp Pin 2 4 Wire Leased Line Local Remote Pin 1 TX Pin 7 RX Pin 2 TX Pin 8 RX Pin 7 RX Pin 1 TX Pin 8 RX Pin 2 TX Fig B 2 RJ 45 Modular Jack Wiring Diagram Page 96 Appendix C RS 232 PIN ASSIGNMENT RS 232 V 24 Description Signal Direction 1 AA 101 Protective Ground computer modem 2 BA 103 Transmit Data computer gt modem 3 BB 104 Receive Data computer modem
65. n x stores the telephone number following it as an STN to be used later by issuing dialing modifiers S n or n For example AT amp Z0 782 2456 Stores 782 2456 as STNO AT amp Z9 02 782 0305 Stores 02 782 0305 as STN9 AT amp Z9 Clears STN9 Each STN can contain up to 49 digits with a total length of not more than 10 sets per 100 digits Spaces are ignored and will not be stored 5 45 Escape Character pe Page 55 Escape character instructs the modem to leave data state and enter command state without breaking the connection Note that this command is only effective in asynchronous mode For the modem to distinguish escape characters from data escape characters must be preceded and proceeded by a guard time period This is called the escape sequence To enter the escape sequence while the modem is on line in data state 1 Wait for one second of guard time without typing or transferring anything 2 Enter the three consecutive escape characters Do not press the return key 3 Wait for another second of guard time without typing or transferring anything Upon recognition of the escape sequence the modem sends an OK response code and escapes to command state The default escape character is ASCII 43 and the default guard time is one second Both are changed by adjusting the values in registers S2 and S12 respectively 5 46 Call Back Security A Command A enables or disables the call back secu
66. nc E0 Disable remote access C2 V25bis bi sync E1 Enable remote access C3 V25bis HDLC p Set remote access password Page 114 Appendix H ABBREVIATIONS ACA Active Configuration Area ASYN Asynchronous BS Back Space CD Carrier Detect CNG Calling Tone CR Carriage Return CTS Clear To Send DCD Data Carrier Detect DCE Data Communications Equipment DL Simu LL Dialup Line Simulate Leased Line DSR Data Set Ready DTE Data Terminal Equipment DTMF Dial Tone Multi Frequency DTR Data Terminal Ready ECDC Error Correction amp Data Compression FB Fall Back FDP Factory Default Profile LL Backup DL Leased Line Backup Dialup Line LALST Local Analog Loopback with Selftest LAL Local Analog Loopback LCD Liquid Crystal Display LDL Local Digital Loopback LF Line Feed MNP Microcom Networking Protocol NVRAM Non Volatile Random Access Memory PSTN Public Switched Telephone Network PSDN Packaged Switched Data Network RA Remote Access RDL Remote Digital Loopback Page 115 RDLST RLSD RI ROM RTS SCP SPK STN SYNC VAR XOFF XON Remote Digital Loopback with Selftest Received Line Signal Detector Ring Indicator Read Only Memory Request To Send Stored Configuration Profile Speaker Stored Telephone Number Synchronous Value Added Reseller Flow Control Character 13H Flow Control Character 11H Page 116
67. oming Call Definition To clear DIC Disregard Incoming Call to respond to incoming call Limits DTR should be on and INC counter gt 0 S1 gt 0 Page 35 Message If commands are issued properly you can execute ATA actions manual answering and you will receive a CNX response If the proper commands were not issued you will receive an INV failure response 2 CRN Call Request with Number Definition Dial command like ATD Limits None Message If a failure occurs while executing CRN commands the following responses will be issued CONDITION RESPONSE 1 DTR Off INV 2 Parameter Error INVPV 3 No Dial Tone CFIAB 4 No Carrier CFIRT 5 No Answer CFINT 6 Busy CFIET For example Command and Response Status Instruction 1 CRN2577125 DTR Off Dial INV DTR is off 2 CRN257AB25 Telephone number INVPV only 0 9 w gt P T and spaces 3 CRN2577125 Busy Dial CFIET Busy 3 CRS Call Request with Memory Address Definition Limits Message Like command ATDS None Same as CRN Page 36 Example CRS 1 Dials STN1 2577125 CFIRT No Carrier 4 CNL Extended V 25bis Command Set Definition Limits Message Example Executes any AT command except amp T amp V Note amp V only effect in Async V 25bis mode None Successful response is VAL Failed response is INVCU 1 CNLX4B1 VAL 2 CNL amp T INVCU amp T is not the correct command 5 DIC Disregar
68. on for more information about the RS 232 cable Two modular jacks are also on the modem rear panel RJ 11 and RJ 45 The jack labelled LINE is for an incoming telephone line RJ 11 and the jack labeled PHONE LEASED is for a telephone set or an incoming leased line RJ 45 If you do not wish to use a telephone set with your modem leave the PHONE jack unconnected PHONE RS 232 LEASE LINE ON lae y a D D Dialun Line z g he aD Power Adantor To OTE Computer RJ11 RJ11 1 Fig 1 1 Modem Rear Panel 1 4 Serial Port and RS 232 Cable Your computer requires an industry standard RS 232 serial port in order to use this modem or any other external modem If you do not have a standard RS 232 serial port consult your dealer to acquire a RS 232 interface card for your computer You also need a serial cable between your modem and your computer s serial port A proper cable for your modem includes Page 3 1 DB25M male connector at one end to match the modem conn ector 2 A connector that corresponds to your computer s serial port at the other end For PC users a standard serial port card has either a DB25M or DB9M connector and your cable must possess one of these two connectors 3 A correct pin to pin cable connection Your modem complies with industry standard pin assignments and most standard modem cables should fit However refer to Appendix B in this manual for more information concerning the pin assignment for you
69. onds with NO CONNECTION ATDT 782 2456 123 Remote modem callers should type 123 for connection if your connection password is 123 The modem waits 15 seconds for passwords and assigning a different value to register 48 changes the waiting period Note that the number of commas waiting period you type after the telephone number can not not exceed the S48 value Pp Sets the connection password up to 9 digits 0 9 and on a touch tone telephone keypad AT P 7452 Sets the local modem connection password AT EI Enables the local modem to connect the password ATS48 15 Instructs the local modem to disconnect if no password is entered within 15 seconds ATA or SO 1 Determines when the ring comes in F Views the password Page 32 4 11 Remote Access RA The modem supports remote access operation and remote access security For remote access first turn on the remote access second channel in the LCD SETUP Main Menu Remote Access Directory After the RA SEC CHANNEL is ON you can configure or issue commands from remote sites If the RA SEC CHANNEL is OFF you cannot use the remote access function F Views the RA password E Enables E1 or disables E0 RA capability and is used for security purposes Issue command E1 for RA links but note that RA links are only possible if the RA SEC CHANNEL in the REMOTE ACCESS directory is activated in addition to command E1 P Set RA Password 4 12 VAR Password Pr
70. or Parameter Syntax Error Parameter Value Error Remote Busy Telephone Number not stored Local Busy No Carrier Abore Call No Dialtone No Answer Forbidden Call Page 39 4 16 Voice Audio Function In addition to data communication and fax transmission Discovery 2814LC also can run with Voice Audio management software Running with the software Discovery 2814LC can support about 1000 voice mail boxes receive voice messages and listen to the voice message or delete message at any time even from remote site The functions are better not only than answering machine but also telephone secretary system For more details please refer to the Data Fax Voice multi communication software user s manual The author of the software also release complete Voice Audio command appendix E as a reference for Voice Audio programmer Page 40 Chapter 5 COMMAND REFERENCE This chapter describes all the available modem commands The default settings if applicable are indicated by bold characters Note that in order to meet local telephone company regulations some modem commands might have been removed or set to a different default 5 1 Answer Call Immediately A Command A instructs the modem to take the telephone line off hook and generate a carrier tone Incoming calls are manually answered 5 2 Manual Answer and Auto Answer An Range n 0 255 Unit Rings Command An instructs the modem to immediately answer incoming cal
71. otection With VAR Password Protection software developers Value Added Reseller VAR can implement check points so software executes pre designed subroutines or quits execution if incorrect VAR passwords are detected If passwords are correct the modem responds with OK otherwise it responds with ERROR Besides many other applications this feature protects VARs from software pirates who illegally duplicate software AT SO lt old password gt lt new password gt Set new VAR Password AT C0 lt password gt Checks the VAR password Page 33 4 13 Call Back Security Call back security protects against callers without the right to access your system allowing you to limit incoming calls to selected persons Call back security allows 10 telephone numbers to be stored in the NVRAM After connection with the local modem an opening message is sent to the caller Then at the password prompt callers have ten seconds to enter the call back password If the correct password is received a goodbye message is sent ending the call back security checking procedure and followed by a hang up The telephone number corresponding to the received password is called in the delay time specified by command D If an incorrect password is received or if there is inactivity for more than ten seconds the modem hangs up AT AI1 Enables call back security AT Z3 7820041 Sets the 3rd telephone number set as 782 0041 AT W3 MISC Sets the 3rd tele
72. ove codes are in ITU T V 42 V 42bis If in MNP V 42 is replaced with REL and CONNECT 300 V42bis CONNECT 600 V42bis CONNECT 1200 V42bis CONNECT 2400 V42bis CONNECT 4800 V42bis CONNECT 9600 V42bis CONNECT 19200 V42bis CONNECT 7200 V42bis CONNECT 14400 V42bis CONNECT 38400 V42bis CONNECT 57600 V42bis CONNECT 12000 V42bis CONNECT 16800 V42bis CONNECT 21600 V42bis CONNECT 24000 V42bis CONNECT 26400 V42bis CONNECT 28800 V42bis CONNECT 300 NOR CONNECT 600 NOR CONNECT 1200 NOR CONNECT 2400 NOR CONNECT 4800 NOR CONNECT 9600 NOR CONNECT 19200 NOR CONNECT 7200 NOR CONNECT 14400 NOR CONNECT 38400 NOR CONNECT 57600 NOR CONNECT 12000 NOR CONNECT 16800 NOR CONNECT 21600 NOR CONNECT 24000 NOR CONNECT 26400 NOR CONNECT 28800 NOR only Connection at300 bps in ECDC reliable mode Connection at 600 bps in ECDC reliable mode Connection at 1200 bps in ECDC reliable mode Connection at 2400 bps in ECDC reliable mode Connection at 4800 bps in ECDC reliable mode Connection at 9600 bps in ECDC reliable mode Connection at 19200 bps in ECDC reliable mode Connection at 7200 bps in ECDC reliable mode Connection at 14400 bps in ECDC reliable mode Connection at 38400 bps in ECDC reliable mode Connection at 57600 bps in ECDC reliable mode Connection at 12000 bps in ECDC reliable mode Connection at 16800 bps in ECDC reliable mode Connection at 21600 bps in ECDC reliable mode Connection at 24000 bps in ECDC reliable mode Connection at 26400bps in E
73. phone number set password as MISC AT D10 Enables a 10 second delay between successful password entry and the matching dial back telephone number set ATA or SO 1 Determines when the ring comes in 4 14 Automatic Detection of Data Fax Voice Call With standard AT fax and Voice Audio command set the Discovery 2814LC modem can automatically detect data facsimile and voice call and give a proper response immediately For more details about the usage please refer to the Data Fax Voice multi communication software user s manual bundled with the modem Page 34 4 15 V 25bis Operation Your modem is equipped with ITU T V 25bis protocol which allows you to enter PSDN through PSTN while in synchronous mode The Discovery LCD modem supports Asynchronous Mode Synchro nous HDLC Mode Bit Sync Mode and Synchronous BSC Mode Byte Sync Mode The following are the commands to enter the three modes CO Disable V 25bis C1 V25bis Async C2 V25bis Bisync C3 V25bis HDLC Please note the following before setting you modem to the above mentioned modes 1 Remember to issue command amp W after the setting if you want to save it 2 Only in V 25bis Asynchronous Mode you can issue V 25bis commands hardware control In HDLC Mode and BSC Mode you need a synchronous card to issue V 25bis commands Command Instructions The following are V 25bis commands their definitions and instructions for use 1 CIC Connect Inc
74. r S10 determines how long the modem waits before hanging up after detecting a loss of carrier This delay permits the carrier to momentarily disappear without causing the modem to disconnect If this register is set to 255 the modem will ignore carrier status as though a carrier were always present Always set S10 to a value larger than S9 The acceptable length of time for momentary carrier loss is the difference between S10 and S9 Touch Tone Dialing Speed S11 Range 50 255 Unit ms Default 95 Register S11 determines the touch tone dialing speed This register sets tone duration and spacing during touch tone dialing The default is approximately 5 26 digits per second Escape Code Guard Time S12 Range 0 255 Unit 20ms Default 50 Register S12 determines the required guard time before the first escape characters and after the last escape characters are entered This allows the modem to distinguish the escape command from transmission data Leased Line Dialup Backup Times S13 Range 0 255 Default 5 Bits Mapped S14 Bit 0 Reserved Biti 0 Disable command echo EO 1 Enable command echo E1 Bit2 0 Enable result code QO 1 Disable result code Q1 Page 80 Bit3 0 Short form result code V0 1 Long form result code V1 Bit4 0 Smart mode state 1 Dumb mode state Bit5 0 Tone dial calls T 1 Pulse dial calls P Bit 6 0 Smart modem IO 1 Dumb modem I1 Bit 7 0 Answer state A SO 1
75. r modem connector If you have any problem acquiring the appropriate RS 232 cable consult your modem distributor or computer dealer 1 5 Telephone Line Test and Phone Cable Telephone line quality significantly affects the reliability of data communications Make sure that both the telephone system and telephone line are in good order before the modem is connected First test the line condition by lifting the telephone handset listening for a clear dial tone and then placing a few calls If the calls do not go through well or are not loud and clear you may have a poor quality telephone line If this is the case find a better quality line for your modem to ensure reliable data communications Connect your modem directly to an outside telephone line Do not connect the modem to a private branch exchange PBX telephone system unless the system is proven to perform well in data transmission applications You need a phone cable to connect the incoming telephone line to the modem The cable must have an RJ 11 plug at one end and a connector which fits the telephone line wall outlet at the other end If the cable included with your modem does not fit your wall outlet acquire an appropriate cable 1 6 Modem Installation Page 4 The distance between the computer and modem is determined by the length of the RS 232 cable However a RS 232 cable should not be longer than fifty feet as signal distortion and interference might occur A su
76. rectory are standard not modifiable by users and permanently entered in the modems NVRAM use either the left or right arrow buttons to go forward or backward to view the contents before pressing ENTER and enabling a configuration In contrast if the contents of a directory or subdirectory include user modifiable configurations such as passwords telephone numbers speeds or times which may amount to a long string of characters modem configuration is slightly different Pressing the right Page 10 arrow button allows users to move along the character string to any particular point in the sting Pressing the left arrow button then allows users to select the possible characters for that point in the string When all the characters in the particular string are shown on the LCD as desired pressing ENTER will enable the configuration for use 6 Pressing the ESCAPE button allows you to exit any particular directory subdirectory or the contents of either Continuing to press the ESCAPE button will retrace your steps and eventually bring users back to the main menu and then to the modem s current operational status 7 Now you are ready to begin modem operation and configuration 2 2 LCD Panel Lock Switch The Panel Lock switch located on the modem control panel secures the LCD panel buttons from unauthorized use and protects your communications and configurations from interruption due to accidental panel button operation To use the Pan
77. rity function AQ0 Disables callback security A1 Enables call back security 5 47 Ring Sound Control B Command B enables or disables the ringing sound generated through the modem speaker when an incoming ring is detected BO Disables incoming ring sound B1 Enables incoming ring sound Page 56 5 48 Check VAR Password Cn This command checks the passwords VPO and VP1 CO Check VAR Password VPO C1 Check VAR Password VP1 To check the VAR password VPO or VP1 you can flow the syntax below with the corresponding response depending on the validity of the password issued Syntax AT Cn lt pattern gt lt CR gt where lt pattern gt is the VPn Response OK If lt pattern gt lt VPO gt or lt VP1 gt ERROR If lt pattern gt is not equal to lt VP0 VP1 gt 5 49 Call Back Security Time Delay Dn Range 1 255 Unit sec Default 30 Command Dn instructs the modem to wait for the specified delay time before proceeding to dial the caller s telephone number 5 50 Connection Password Security E Command E enables or disables connection password security If enabled callers must include the correct password in the dial command string If the password is correct a connection is established Otherwise there will be no modem connection E0 Disables connection password security E1 Enables connection password security 5 51 View Connection and Remote Access Passwords F Page 57 Command F di
78. s E1 Bit 1 4 0 Reserved Bit 5 0 Disable remote access security 1 Enable remote access security Bit6 7 0 Reserved Remote Access Attention Character S41 Default 42 O0 lt n lt 255 Unit ASCII V 42bis Compression Dictionary Max String Length S4 Default 16 0 lt n lt 255 Unit Byte Page 90 Bits Mapped 43 Bit0O 1 0 Set maximun MNP block to 64 characters AQ 1 Set maximum MNP block to 128 characters A1 2 Set maximum MNP block to 192 characters A2 3 Set maximum MNP block to 256 characters A3 Bit 2 0 Reserved Bit3 4 0 Set maximum dictionary size to 512 entries 1 Set maximum dictionary size to 1024 entries 2 Set maximum dictionary size to 2048 entries 3 Set maximum dictionary size to 4048 entries Bit 5 0 Reserved Bit 6 7 0 Does not buffer data CO 1 Buffers data for 4 seconds until 200 characters or when a SYN character is detected then switches tonormal C1 2 Does not buffer data switches to normal C2 3 Reserved Bits Mapped S44 Bit 0 0 Reserved Bit 1 0 Reserved Bit 2 0 Disable on line data echo EO 1 Enable on line data echo E1 Bit 3 0 Disable modem port flow GO 1 Enable modem port flow G1 Bit 4 6 0 Reserved Bit 7 0 Independent serial port speed connection JO 1 Dependent serial port speed connection J1 Page 91 Bits Mapped S45 Bit 0 2 Bit 3 Bit 4 Bit 5 7 Bits Mapped NAYANDNFWNrFO FO FO Break control type d
79. s Default 0 Command N n determines how many times the modem redials a call if a busy signal is detected The default setting is N 0 so the modem will not redial Note that the redial function is cancelled if you abort dialing 5 14 Redial Interval N5 n Range n 0 255 Unit 2 sec Default 1 Command N5 n adjusts the time interval between redialing where n denotes the interval in seconds For example N5 45 Instructs the modem to redial a call every 90 seconds Page 46 5 15 Read Redial Count N Issuing N displays the redial times setting 5 16 Read Redial Interval N5 Issuing command N5 displays the time interval between the number of redial times 5 17 On Line O Command O instructs the modem to enter on line data state o0 Instructs the modem to enter on line data state and resume data transmission with the remote modem O1 Instructss the modem to enter on line data state and initiates an equalizer retrain sequence at the same speed This is used when excessive bit error rates occur and a retrain might reduce the errors attributed to a loss of equalization Note that this command is effective only at 2400 bps or above 5 18 Pulse Dialing P Inserting command P before a telephone number instructs the modem to pulse dial the number You may insert command P anywhere in a dial command line even between digits For example AT DT 9 P 782 2456 Instructs the modem to tone dial 9 wait for
80. serial port also responds in the same way to an XON XOFF sent from the local computer Uses uni directional CTS flow control Data transmission from the local computer stops if the modem turns CTS OFF and resumes when CTS is turned ON Uses bi directional RTS CTS flow contrl Data transmission from the local computer to the modem Page 64 stops when CTS is OFF and resumes when CTS is ON In contrast data transmission from the modem to the local computer stops when RTS is OFF and resumes when RTS is ON Q4 The serial port generates but does not respond to XON XOFF flow control characters Q5 Uses uni directional flow control just as Q2 does but kept CTS OFF until a connection is established Q6 Uses bi directional hardware flow control just as Q3 does but kept CTS OFF until a connection is established Note that flow control is not used if the modem is in a direct connection Similarly command Q is ignored 5 73 Inactivity Timer Tn Range 0 255 Unit Minutes Default 0 Command Tn determines how many minutes of inactivity the modem waits for before hanging up if no data is sent or received during a normal or reliable link The inactivity timer is effective in normal and reliable links and must be set before the modem enters on line state 5 74 Result Code Form V Command V determines whether the V 42bis MNP extended response codes are displayed as well as with or without data compression identifiers
81. source voltage is correct before plugging in the adaptor 1 7 Communication Software Installation Page 5 Since your modem has a standard modem command set most popular communication software packages are compatible To install the software turn on your computer and modem and then follow the software manual instructions Unfortunately we are unable to describe software configuration procedures in detail as the procedures vary with each software package computer and application Refer to the software manual with your modem package for more information If you experience any difficulty regarding use of the software package please contact the software publisher or us However pay particular attention to the following parameter settings as an unsuccessful modem installation is probably due to an incorrect setting 1 The serial port number is set from COM1 to COM4 2 The communications protocol is either ITU T or Bell 3 The data is formatted correctly including data bit parity and stop bit 8N1 or another valid format A serial port can accept only one peripheral device and vice versa The serial port number specified in the communications software must be consistent with the computer s serial port to which the modem is actually connected The selection of a serial port is done on the serial port card The ports are usually denoted as COM1 to COM4 Refer to the serial port card s manual for details In order to comm
82. splays the connection password defined by P as well as the RA password defined by command P 5 52 Closing Message G String length up to 60 characters Command G sets a closing message Refer to the syntax below AT G lt enter gt Message lt enter message string gt lt enter gt OK The default closing string is THANK YOU YOU WILL BE CALLED BACK 5 53 Smart Dumb Mode Command I instructs the modem to enter smart or dumb mode I10 Sets the modem to smart mode I1 Sets the modem to dumb mode and is disabled when the modem is turned off 5 54 Opening Message O String length up to 60 characters Command O sets an opening message Refer to the syntax below AT O lt enter gt Message lt enter message string gt lt enter gt OK The default opening string is PLEASE ENTER CALL BACK PASSWORD Page 58 5 55 Set Connection Password P x String length up to 9 characters numbers 0 through 9 or Command P x defines the password required to establish a connection when connection password security is enabled 5 56 View VAR Buffer A Q0 This command views the VAR buffer VPO It s optional and only available when customer gives his request 5 57 Set VAR Password SO This command writes the protection VPO defined by SO To write the password to the VAR buffer follow the syntax below Syntax AT S0O lt old password gt lt new password gt lt CR gt Response OK if lt old patter
83. t 10 Unit sec 0 lt n lt 255 Dn Bit 1 0 Disable 141 active RDL 1 Enable 141 active RDL Bits Mapped 32 Bit 0 0 Disable ring sound BO 1 Enable ring sound B1 Bit 1 0 Disable call back security AQO 1 Enable call back security A1 Bit 2 0 Disable hardware data security EO 1 Enable hardware data security E1 Bit 3 0 Open message working bit 1 Close message working bit Bit 4 0 Disable V 32 forward backward link 1 Enable V 32 forward backward link Bit 5 0 Command AT amp Z working bit 1 Command AT Z working bit Bit 6 7 0 Dialup line amp LO 1 2 wire leased line amp L1 2 4 wire leased line amp L2 Page 87 Service Class 33 Bit0 5 0 Reserved Bit 6 0 MNP synchronous link LO 1 MNP asynchronous link L1 Bit 7 0 Disable second channel 1 Enable second channel Bits Mapped S34 Bit 0 0 V 32 TCM 1 V 32 QAM Bit 1 0 Disable ignore DTR dump in handshaking 1 Enable ignore DTR dump in handshaking Bit23 0 RLSD on 43dBm off 48dBm 1 RLSD on 33dBm off 38dBm 2 RLSD on 26dBm off 31dBm 3 RLSD on 16dBm off 21dBm Bit4 5 0 Normal AT amp F ATZ 1 Quick ATZ 2 Quick AT amp F 3 Quick AT amp F ATZ Bit6 7 0 Reserved Bits Mapped S35 Bit 0 3 0 9 STN for power on auto dial amp A0 9 15 Disable power on auto dial amp A99 Bit4 5 0 Disable all Y0 1 Dialup line simulate leased line Y1 2 Leased line backup dialup line Y2 Bit 6 0 Single phone system MO
84. t clock amp X0 Local DTE synchronous transmit clock source amp X1 Remote modem synchronous transmit clock source amp X2 Reserved ITU T Bell auto mode BO Bell 103 212A mode B1 ITU T V 23 back channel B2 ITU T V 23 main channel B3 S28 Bit 0 4 AUNeO 75bps serial port speed 110bps serial port speed 300bps serial port speed 600bps serial port speed 1200bps serial port speed Page 85 5 2400bps serial port speed 6 4800bps serial port speed 7 7200bps serial port speed 8 9600bps serial port speed 9 12000bps serial port speed 10 14400bps serial port speed 11 16800bps serial port speed 12 19200bps serial port speed 13 21600bps serial port speed 14 24000bps serial port speed 15 26400bps serial port speed 16 28800bps serial port speed 17 38400bps serial port speed 18 57600bps serial port speed 19 115200bps serial port speed Bit5 6 0 Serial port even parity 1 Serial port space 2 Serial port odd parity 3 Serial port none mark Bit 7 0 Serial port 8 data bits 1 Serial port 7 data bits Bits Mapped S29 Bit0 1 0 DCE 5 data bits 1 DCE 6 data bits 2 DCE 7 data bits 3 DCE 8 data bits Bit2 3 0 DCE none parity 1 DCE space parity 2 DCE even parity 3 DCE odd parity Bit 4 0 DCE 1 stop bit 1 DCE 2 stop bits Page 86 Bit5 7 0 Reserved Set Major SCP as Default S30 Default 1 1 lt n lt 4 amp Yn Set Call Back Delay Timer S31 Defaul
85. t panel On your computer monitor you should see NO CARRIER If not continue to press the V D button until it appears After you ve changed smart mode to dumb mode or dumb mode to smart mode if you want next time you turn on the modem and still keep the change you shound use keyboard to enter the command AT amp W or use LCD control panel into PROFILE main directory under SAVE PROFILE to save the change to NVRAM Page 24 3 5 Factory Default Profile FDP The FDP is the default configuration profile stored in your modem s read only memory ROM which is not to be modified by the user For convenience in different applications the modem supports 13 FDPs FDPO through FDP12 3 6 Stored Configuration Profile SC The SCP is the configuration profile stored in the modem NVRAM which can be retrieved for further use There are 4 SCPs your modem can retain SCPO SCP1 SCP2 and SCP3 SCP1 is the configuration profile factory setting for ECDC operation for PC users SCP2 is for non ECDC use for PC users SCP3 is for Macintosh or terminal users for ECDC operation SCP4 is for Macintosh or terminal users for non ECDC operation The table below lists the SCPs and their corresponding profiles and operation modes Operation Mode amp F Command SCP1 ECDC amp C1 amp D2 SCP2 non ECDC amp C1 amp D2 SCP3 ECDC amp CO0 amp DO SCP4 non ECDC amp CO0 amp DO 3 7 Major Stored Configuration Profile Major SCP The major SCP is loaded to
86. to perform various diagnostic tests See the Chapter 6 of this manual for further details 5 40 Read Configuration Profile amp V Command amp V displays the stored configuration profile SCP the stored telephone number STN and current modem operation states amp V0 Displays ACA SCP and current modem operational status amp V1 Displays STN 5 41 Write Configuration Profile amp W Command amp W writes the content in the active configuration area ACA to one of the stored configuration profiles SCP amp WO Writes ACA to the major SCP amp W1 Writes ACA to SCP1 amp W2 Writes ACA to SCP2 amp W3 Writes ACA to SCP3 amp W4 Writes ACA to SCP4 After saving a profile enable it by issuing the proper amp Y command Page 54 5 42 TX Clock amp X Command amp X selects the TX clock setting in synchronous mode amp X0 Sets Internal TX clock to Pin 15 RS 232 amp X1 Sets External TX clock from Pin 24 RS 232 amp X2 Sets Slave TX clock to Pin 15 RS 232 5 43 Major Stored Configuration Profile amp Y Command amp Y assignees a stored configuration profile SCP as the major SCP which is used when command Zn or amp W are executed or when the modem is turned on amp Y1 Assigns SCP1 as the major SCP amp Y2 Assigns SCP2 as the major SCP amp Y3 Assigns SCP3 as the major SCP amp Y4 Assigns SCP4 as the major SCP 5 44 Stored Telephone Number amp Zn Range n 0 9 Command amp Z
87. tting the RA password 1 Command P must be the last command in a command line 2 The RA password is limited to 9 printable ASCII characters 3 The RA SEC CHANNEL in the LCD SETUP Main Menu Remote Access Directory must be ON before an RA connection is possible 5 65 Maximum MNP Block Size A Command A sets the maximum MNP block size for reliable links AO Block size is 64 characters Al Block size is 128 characters A2 Block size is 192 characters A3 Block size is 256 characters 5 66 Transmit Break Bn Range 0 9 Units 100 ms Default 3 300 ms Command Bn instructs the modem to transmit a break signal to the re mote system In direct links the break length depends on the value of n For example Page 61 B1 Indicates a break of 100 milliseconds B2 Indicates a break of 200 milliseconds In reliable links the break length is a constant 300 milliseconds regardless of the value of n If either B or BO are issued the modem sends a fixed 300 millisecond break to the remote system 5 67 Auto Reliable Buffer Option C Command C determines how the modem handles data it receives during the initial waiting period when answering a call in auto reliable mode CO Instructs the modem not to buffer data during auto reliable connection All data received during this period will be discarded C1 Instructs the modem to buffer the data it receives during the waiting period In reliable links the mod
88. two modems should then establish a connection and go on line through the leased line Note that two modems on a leased line link must be set to exactly the same protocol one in dialing mode and the other in answering mode To set the modem to auto answer mode assign a non zero value to register SO The AA Auto Answer indicator on the modem front panel will be lit 4 5 Power On Leased Line Operation In leased line applications the modem can be set to automatically connect with a remote site each time it is turned on and continuously attempt to establish a leased line connection with a remote modem until successful For power on leased line operation 1 2 Set your modem for leased line operation as explained in the previous section Issue AT amp F amp L1SO 1 11 amp W to one modem setting it as the 2 wire leased line answering modem Issue AT amp F amp L1S0 0 I1 amp W to the other modem setting it as the dialing modem Simply change amp L1 to amp L2 in step 2 and step 3 for 4 wire leased line system Both modem are now ready for power on leased line operation You can also set up your modem by using LCD control panel from step 2 to step 3 Once you ve saved dumb mode setting to your modem s NVRAM and next time when you turn on your modem it will not accept AT command you should only use LCD control panel to change it return to smart mode Page 29 4 6 Leased Line Dialup Backup The modem supports a dialup backup
89. two seconds comma character and then pulse dial 782 2456 Page 47 5 19 Response Codes Q Command Q enables or disables the sending of response codes after a command line is executed Q0 Enables the sending of response codes Q1 Disables the sending of response codes This feature is useful if the modem is connected to a printer that prints out undesired response code characters 5 20 Read Register Sr Command Sr displays the content of register r For example ATS7 Displays the value stored in register S7 ATS5 S7 Displays the values in both register S5 and S7 5 21 Set Register Sr n Command Sr n sets register r to value n For example ATS0 3 Sets register SO to3 5 22 Touch Tone Dialing T Inserting command T before a telephone number instructs the modem to tone dial the number The tone dialing speed is determined by register S11 You may insert command T anywhere in a dial command line even between digits to have the modem tone dial the following digits Page 48 For example AT DP 9 T 782 0002 Instructs modem to pulse dial 9 wait for two seconds comma character and then tone dial 782 0002 5 23 Word or Digital Response Codes V Command V instructs the modem to send response codes in either word or digit form VO Sends response codes in digital form This form is convenient when using the modem with software that does not handle character strings efficiently V1 Sen
90. u is set up to provide a quick reference for the operation status of the modem QUALITY line quality GOOD MEDIUM BAD S N RATIO xx dB RX LEVEL xx dBm TX LEVEL xx dBm RETRAINS XXXXX RLSD LOSS XXXXX DTE XXXXX XXX XX TX amp RX THROUGHPUT XXXXXX XXXXXX DISCONNECT MESSAGE NONE ATH DISC DTR OFF VOICE DATA DISC CARRIER LOSS NOANS WER V42 FRAME ERROR NO MATCH USER KEY ABORT Page 13 2 6 SETUP Main Menu SETUP in the Main Menu contains the following directories DTE DCE COMMAND LINE PROTOCOL CALL BACK REMOTE ACCESS and MISC SETUP in the Main Menu provides most of the directories needed for setting and monitoring basic modem functions 2 7 SETUP Main Menu DTE Directory The DTE directory contains the following settings DTE SPEED DATA BITS PARITY STOP BIT FLOW CONTROL Q DTR CONTROL amp D DTR DROP TIME S25 DTR RISE TIME RTS CONTROL amp R RTS CTS DELAY S26 DSR CONTROL amp S DCD CONTROL amp C AUTO 110 300 600 1200 2400 4800 7200 9600 14400 19200 28800 38400 57600 115200 7 8 NONE SPACE EVEN ODD 1 2 NONE XON XOFF CTS ONLY RTS CTS IGNORE DTR COMMAND STATE DISCONNECT RESET xx 10ms xx 10ms CTS TRACK RTS IGNORE RTS xx 10ms FORCE ON FOLLOW DTE FORCE ON TRACK CARRIER Page 14 2 8 SETUP Main Menu DCE Directory The DCE directory contains the following settings DCE SPEED B PROTOCOL TYPE V SY
91. unicate successfully the protocol and data format of the two on line modems must be the same For example if the bulletin board you are going to dial supports ITU T standard 8 data bits no parity 1 stop bit you should specify exactly the same Otherwise the connection will not be established or the data received will be unreadable garbled 1 8 Software Configuration Tips Many popular communications software packages allow users to Page 6 specify a command string which is sent to the modem prior to a dialing session This string is usually called the Dialing Prefix or Dialing String and it instructs the modem prior to dialing and going on line Listed below are common commands which are helpful for setting the software Dialing Prefix Dialing String ATS0 3 ATX4DT9W ATS6 10DP ATM2L3DT ATBODT AT amp PIDP AT amp PODP AT N1 Instructs the modem to auto answer an incoming call on the third ring by setting register SO to 3 Instructs the modem to tone dial the number 9 and hold it until a dial tone is detected This string also selects the X4 response set Instructs the modem to wait for 10 seconds and then use pulse dial the call The modem monitoring speaker is always on with high volume and tone dials the call Instructs the modem to use ITU T protocol to establish a connection with the remote modem and tone dial the call Pulse dials with a make break ratio of 33 67 for most European countries

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