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Multi-Tech Systems BA-Series User's Manual

1. 77 8 5 AME CHNAUG Al SUS OOM RET PT TL 8 6 nrc a N Eaa O a a 77 iii cr na iano 78 Appendix A Upgrading Your Modem s Firmware 79 APppendix B IFOUDIESNOOtNO ssarii er tetas pera Eee eiu tp deest ear ovp ratu a 82 Apendix C AT Command SUImffigaly iii ail 87 Appendix D V 25bis Operation i 96 Appendix E MultiModemBA Cables 3 ninaa iea I ia 102 Appendix F Regulatory IM OMANO coss catena tet ea te ea iron 103 MOER MERE DO Multi Chapter 1 Introduction and Description Multi lech Systems MultiModemBA User Guide 1 1 1 2 Introduction Welcome to the world of data communications You have acquired one of the finest intelligent desktop data fax modems available today the MultiModem BA series modem from Multi Tech Systems This User Guide covers various models within the BA series and unless otherwise noted all content should be considered relevant to all models Your MultiModem provides data communication at the following rates 33 600 14 400 bps Enhanced V 34 V 32bis The MultiModem also provides other prevalent data communications standards and includes dial backup with automatic lease line restoration adaptive protocol enhancing used in typical Unix batch file transfers and support for IBM s AS 400 and Windows environments How To Use This Manual The information contained in each chapter and appendix is as follows
2. esses 10 Modem Does Not Respond to Commands 82 Font silicio 82 Modem Reset Z ee 32 Functional States uu euet aire rie 22 Modem Initiated Flow Control Commands 43 MOGUIANOM es T 9 G MT1432BL Connections 16 MIT2834BL Cables rn etii toes 102 Garbage Characters i 86 vaio T o o 77 Guard Tories amp G rsa 34 H N Hardware Flow Control RE e 1 Normal Mode GE gg Help Screens DIA esi ceri iaadesa 46 Normal Mode Modem Flow Control amp E11 42 HOMO eil NormalAmo Raliable Raliable Mode Comnasndeds COMMANDS sien 3 9 p eee 23 Number of Rings Until Modem Answers 50 55 O Immediate Action Line Probe Commands A Online qiade direc lai 22 Inactivity Timer 54 ordering replacement parts 77 Indicators indere ee 10 Originate Mode 39 Initialization SINGS ina 18 19 82 84 Originate Answer Mode 68 POcormpaliDla 5 teet bci edet pacis 18 initiating Line PrODG eeeeot ien 48 P Intelligent Features eeessssss 9 Intelligent Serial Interface ISI CEPI At Se Per MENTITE 45 Parameters cece cc cceeccceeecseeesesueeseueeeeeaeeenens 18 19 Internal External Clocking 70 Changing defaults eene 19 International
3. 11 Enter the amp W0 command and hit RETURN to store parameters and S Register values in RAM 59 MultiModemBA User Guide 60 Table 6 2 Callback Password and Dial Back Phone Number Entry Procedures Step Procedure Enter your modem s LOGIN Password as selected in Table 6 1 by entering the following ATZIxxxxxxxxxx CH Qooooxxxxx from Table 6 1 Enter your modem s Setup Password as selected in Table 6 1 by entering the following AT Syyyyyyyyyy lt CR gt yyyyyyyyyy from Table 6 1 Enable the Callback Security feature by entering the following AT DB2 lt CR gt or AT DB1 lt CR gt The following message is displayed on your monitor Entering Callback Mode current phone numbers will be erased Do you want to continue Y N Enter a Yor N and hit RETURN Note If this is your first time into Callback Mode we recommend answering Y to clear all previous Callback Passwords and phone numbers from memory Enter individual Callback Passwords for each of 30 different phone number memory locations as follows AT CBNOxxxxxxxxxx lt CR gt To enter Callback Password for the first location a minimum 6 characters up to a maximum of 10 characters must be used AT CBN1xxxxxxxxxx lt CR gt To enter Callback Password for the second location etc a minimum 6 characters up to a maximum of 10 characters must be used Note The first character of your first Callback Password must be non numeric Enter individual phone numbers f
4. DBn CBNyyxxxxxx Dxxxxxx Nxx Pn RCBNxx RDNxx Description DBO disables Callback Security and answering Yes to the prompt turns off Callback Security and erases stored phone numbers and passwords Answering No to the prompt aborts the command DB1 activates remote and local password security DB2 activates remote password security Callback password with xxxxxx being callback password and yy being the memory location Callback password xxxxxx must start with a non numeric character and upper lower case sensitive Callback password xxxxxx must be a minimum of 6 and maximum of 10 characters yy memory locations are from 0 to 29 Must specify P pulse or T tone dialing in string Callback Phone Numbers xxxxxx with the preceding the phone number indicating the callback modem phone number for the corresponding password at the same memory location The preceding the phone number enables direct entry when the caller uses the correct password without the callback modem having to return the call The entry at the end of the phone number represents an extension added to the main phone number The Nxx is the memory location of the callback phone number and password Parity of the prompt messages sent by the callback modem PO is no parity amp P1 is odd parity P2 is even parity Erases the callback password stored at memory location xx Memory locations are O to 29 Erases the callback phone
5. Appendix A Upgrading Your Modem s Firmware Appendix B Troubleshooting Appendix C AT Command Summary Appendix D V 25bis Operation Appendix E Cabling Diagrams Appendix F Regulatory Information Modem Features The MultiModem BA Series modem connections can be made on Public Switched Telephone Networks PSTNs and or point to point 2 wire telephone type circuits Your modem offers interactive automatic dialing as well as Command Mode option configuration You may store up to ten command line telephone numbers of up to 60 characters each in the modem s nonvolatile memory The modem pulse or tone dials and recognizes dial tones and busy signals for reliable call progress detection The modem can detect AT amp T calling card tones It is FCC Registered for connection to telephone networks without any Data Access Arrangements DAA s Your modem also features Callback Security to protect networks from unauthorized use and to manage phone line costs By using the modem s phone number and password directory a host site can upon receipt of a call callback to a remote site at a predetermined number Remote Configuration permits you to assist users at remote sites saving you the time and trouble of site visits and preventing misinterpretation of configuration instructions MultiModemBA User Guide 1 4 1 3 1 2834 Series Features Your MT2834BA modem meets the proposed Enhanced V 34 ITU standard for data signalling rates
6. Help Screens H The Help command is designed to give you short explanations on how to use each modem command The Help command can be quite useful if your manual is not handy and you are in the middle of a communications session Although the explanations are quite abbreviated compared to those in this manual they should prove to be helpful reminders when needed At the time of this writing we have three screens of Help information Screen 1 2 and 3 and more screens may be added in the future The Help commands are structured so that you can call up one of three Help screens as follows AT H1 Help Screen 1 AT H2 Help Screen 2 AT H3 Help Screen 3 Inquiry for Product Code I Some systems or software packages automatically check the identification of the modem with which they are communicating by using the command This read command lets the software to determine the type of modem with which it is communicating When ATI or ATIO is entered the modem responds with 247 When ATH is entered the modem responds with a three digit code indicating the firmware version number When ATI2 is entered the modem responds with MT2834BA MT1432BA or MT932BA depending on model Windows 95 Autodetect Inquiry I9 This read command permits a Windows 95 operating system to query the MT2834BA s characteristics When ATI9 lt CR gt is entered the symbols BA 28800 FAX CT are displayed which indicates to the Windows 95 system th
7. The F command can be used to disable this fallback to Normal due to CARRIAGE RETURN feature The Auto Reliable fallback character F and Auto Reliable buffering 4 commands can be used together to cause the modem to buffer all data received up until the CARRIAGE RETURN and then drop to Normal mode All data received will then be output following the CONNECT message AT FO0 Do not fall back to Normal if CARRIAGE RETURN received AT F1 Fall back to Normal mode if CARRIAGE RETURN received The factory default is F0 39 MultiModemBA User Guide Retransmit Count R If errors are received during a Reliable connection the modem re sends the block of data which contained an error With the R0 command if another error occurs the block will be re sent again The modem counts the number of times that a data block is re sent If the same block of data is resent 12 times and still has not been received properly the modem assumes that the transmission line is unsuitable for transmission and abort the connection This retransmit counter is disabled by the R1 command When the retransmit counter is disabled the modem keeps trying to send data and will not abort no matter how many times the same block is resent AT RO Disconnect if retransmit count is exceeded AT R1 Do not disconnect due to retransmits The factory default setting is RO V 42 Error Correction 300bps E At 300 bps error correction is not typically used
8. 33 6K 31 2K 28 8K 26 4K 24K The modem default is a value of 0 which indicates a connection attempt of 33 6K Reading and Assigning S Register Values The S command is used to assign a value to and to read the current value of an S Register To read an S Register value enter the letter S followed by the S register number and a question mark 7 then hit RETURN For example entering ATS7 and hitting RETURN displays the value of S Register S7 in a 3 digit decimal form The number 8 would appear as 008 the number 30 would appear as 030 and the number 255 would appear as 255 To assign a value to an S Register enter the letter S followed by the S Register number and an equals sign and then a decimal response to the message ENTER THE NEW VALUE IN DECIMAL FORMAT Convert all ASCII characters to their decimal equivalents before entering them S Register decimal values range from 0 127 for ASCII characters or 0 255 for numeric values 55 MultiModemBA User Guide 5 3 56 5 2 1 Examples of Assigning Values 1 Let s say you wish to have longer pauses caused by the comma in a dial command five seconds instead of two Entering ATS8 5 assigns 5 as the value for S Register S8 meaning the modem pauses five seconds for a comma in a dial commana 2 Ina second example let s say that you wish to configure the modem to answer incoming calls after the 30th ring instead of after the first ring To configure S Register SO with
9. E1 lets the modem function at 300 bps in either Normal amp E0 Auto Reliable amp ET or Reliable amp E2 mode E0 which is the modem s default disables 300 bps V 42 error correction altogether AT E0 No V 42 Error correction at 300 bps AT E1 V 42 Error Correction at 300 bps The factory default setting is E0 4 4 9 Flow Control Commands Flow control refers to the techniques used by computer devices to stop and restart the flow of data to and from each other Flow control is necessary so that a device does not receive more data than it can handle In the case of the MultiModem there is a need for flow control in both directions As illustrated on the next page flow control for data passing from your computer to the modem is called Modem Initiated Flow Control and flow control for data passing from the modem to your computer is called Computer Terminal Initiated Pacing The MultiModem supports both hardware and software Modem Initiated Flow Control On the Computer Terminal Initiated Pacing side it supports hardware and software flow control and a special version used by Hewlett Packard compatible systems called ENQ ACK Pacing The modem allows hardware and software pacing to be passed through the modem to the other end of the link so that your computer or terminal can control data start stop activity through your modem This is called Xon Xoff Pass Through To state it simply Flow Control is something the modem does to th
10. IRI to neruorum 10 brin T E A N A T 27 Dial Phone Number Provided CRN Command 99 Dialing a Stored Number N 27 Digital Loopback Test reet 69 DIMENSIONS 10 DAP SWIIGEIBS illa 72 Disregard or Connect to Incoming Calls DIC or CIC 99 DSR CD Interaction Control amp SF 38 DTR Dialing E D PR RE 28 DTR Dialing D Command 100 DTR Dropout TIME 53 Dual Tone Multi Frequency dialing 28 dumb dialing iieii 34 E echnical Specifications n 9 EMC Safety and R amp TTE Directive Compliance105 Enable Disable Auto Answer 68 Enable Disable Auto Reliable Fallback Character39 Enable Disable Command Mode 69 Enable Disable V 25bis Mode V Command 98 Enable Suppress Responses 67 Erase Callback Password RCBNxx 63 Erase Callback Phone Number RDNxx 63 Error COTFOCUOFD scr 9 Index Escape Code Character 50 L Escape Sequence Options E 47 Escape Sequences AT lt CR gt urina 47 Leased Line Dial Up Operation ERRATI 70 Examples of Assigning Values eR 56 Limited Warranty buscadas eara Eat ecd aaa 10 Examples of Reading METUS ri heec inten 56 Line Feed Character TO OTT IO 51 Exiting Command Mode Going Back On Line O 48 Link Request EO ETE TII TUI IN I
11. and Xon which is a Control Q restarts it With regard to Binary Data Xon Xoff flow control is not recommended because an Xoff character may be part of the data and would trigger an Xoff of the modem or software package which would halt data flow Xon Xoff Pass Through amp E7 So far you have had three choices to make regarding pacing 1 Youcansetthe modem to respond to Xon Xoff pacing 2 You can set the modem to respond to RTS pacing 3 You can set the modem to ignore pacing completely Well we re not done with pacing yet There s another choice you can make which actually can apply to both pacing and modem initiated flow control although it applies mainly to pacing and that is something called Xon Xoff Pass Through This means that if your modem is set to respond to Xon Xoff commands you can have the modem do one of the following 1 The modem responds to the Xon and Xoff pacing commands while at the same time allowing these commands to pass through the modem and on to the remote location We call this Respond Pass Through 2 The modem responds to Xon Xoff pacing but does not allow the pacing signals to pass through the modem and on to the remote location We call this Respond No Pass Through When Xon and Xoff commands are allowed to pass through the modem the computer or terminal at the remote site will receive these commands and depending on how it is configured the computer or terminal may respond to t
12. 1 or 2 With 1 the modem goes back into data mode and with 2 the modem responds with the following Password 3 Enter your Setup Password and if the code is correct the modem responds with OK You can now use any AT commands of the modem being remotely configured as if they were being entered locally You cannot change the setup of the LOGIN Password until you enter the proper LOGIN Password 4 When you are done entering AT commands and you want to exit type ATO and hit RETURN The modem responds with 1 DATA Mode 2 COMMAND Mode 5 Entera 1 to go back on line with your computer or enter 2 and the correct password to talk to your modem Remote Configuration and Callback Security AT Commands When you have callback security enabled for the modem anyone trying to connect with the modem will be required to furnish a password The ZCBN command allows you to enter passwords for each of the 30 memory locations used for callback security The length of each password can be up to 10 characters but must be at least 6 characters Any ASCII character can be used The format for this command is ATZCBNyyxxxxxxxx CR with xxxxxxxx representing the password and yy being the memory location 0 29 Each callback password xxxxxxxx must start with a non numeric character Callback Security Enable Disable DB The purpose of this command is to enable or disable default setting your modem s callback security option Once this command is
13. AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED This warranty does not apply to any products which have been damaged by lightning storms water or power surges or which have been neglected altered abused used for a purpose other than the one for which they were manufactured repaired by Customer or any party without MTS s written authorization or used in any manner inconsistent with MTS s instructions MTS s entire obligation under this warranty shall be limited at MTS s option to repair or replacement of any products which prove to be defective within the warranty period or at MTS s option issuance of a refund of the purchase price Defective products must be returned by Customer to MTS s factory transportation prepaid MTS WILL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES AND UNDER NO CIRCUMSTANCES WILL ITS LIABILITY EXCEED THE PRICE FOR DEFECTIVE PRODUCTS Repair Procedures for U S and Canadian Customers In the event that service is required products may be shipped freight prepaid to our Mounds View Minnesota factory Multi Tech Systems Inc 2205 Woodale Drive Mounds View MN 55112 Attn Repairs Serial A Returned Materials Authorization RMA is not required Return shipping charges surface will be paid by MTS Please include inside the shipping box a description of the problem a return shipping address must have street address not P O Box your telephone number and if the product is out of warr
14. Baud Rate SB The SB command presets the speed of the modem s serial RS 232C port in both Originate and Answer modes Speed conversion allows you to set this serial port baud rate at a fixed speed of up to 115 200 bps for 1932 and 2834 models and 57600 bps for 1432 models regardless of the modem s transmission speed setting In order for this command to be effective the modem s Speed Conversion feature must first be turned off with the BA command When Baud Adjust is on the modem automatically adjusts its serial port baud rate to match the speed of the computer or terminal it is connected to as soon as it receives its first AT command However in many applications such as automatic answer the modem may not receive AT commands in which case it is very useful to be able to preset the serial port baud rate with this SB command In addition to setting the modem s serial port speed this command also sets the speed at which the modem issues Command mode responses The modem will accept AT commands at any speed regardless of the speed preset by the SB command If the modem receives such a command at a speed that is different than the preset speed the modem switches its serial port baud rate to match the new AT command speed although the baud rate value stored by the SB command remains the same This provides you with a convenient way to switch the serial port speed and still make it easy to go back to the original speed automatically
15. Command Mode COMMAND MODE Dial D or A command or incoming phone call WAIT FOR CARRIER No carrier detected Carrier detected ON LINE Carrier lost MODE Figure 41 Functional Modes Summary of AT Commands A wide variety of autodial operations and modem options can be controlled when the modem is in Command Mode Remember nearly all commands begin with AT These commands are organized into several functional groups An alphabetical summary of commands is provided in Appendix D HOW TO COMMANDS DIAL D Dial A or Continuous Redial D DTR Dialing VD Voice Data Dialing N Dial a Stored Number MODIFY DIALING P T Pulse Tone Dialing PROCEDURES amp P Set Pulse Dial Ratios i Automatic Pauses in dialing Y Long Space Disconnect W Wait for New Dial Tone Return to Command Mode After Dial Command R Reverse Mode of Operation I Flash On Hook AT amp T Calling Card Tones e Quiet Answer MEMORIZE PHONE NUMBERS D N Store Phone Numbers NN Number Linking L List Numbers Stored in Memory 23 MultiModemBA User Guide STORE MODEM CONFIGURATIONS AND DEFAULTS CONFIGURE COMMAND RESPONSES CONDITION PHONE LINE CONTROL RS232C INTERFACE CONFIGURE ERROR CORRECTION CONFIGURE FLOW CONTROL amp F amp W SP amp M amp X amp EO amp E3 amp E4 amp E5 amp E6 amp E7 X amp E8 amp E9 amp E10 amp E11 amp E12 amp E13 amp BS EB P Load Factory Defaul
16. Default 2 4 Description S8 sets the length of the pause caused by a comma inserted in a dialing command The default setting is two seconds or two units Decimal 2 or four seconds where each unit is one second S8 may be set for up to 255 seconds S8 also sets the time the modem waits before retrying a call after detecting a busy signal Some computer systems need more than two seconds to reset in which case you should increase the value of S8 Value for International and DOC units Value for International units only 51 MultiModemBA User Guide 52 S9 Carrier Detect Response Time Unit Range Default Description S10 100 mSec 1 255 6 S9 sets the time delay between when the modem first detects a valid incoming carrier signal and when the modem turns on its Carrier Detect circuit The default setting is 600 milliseconds or six units of 100 mSec each Decimal 6 S9 may be set for up to 25 5 seconds Carrier Loss Disconnect Delay Time Unit Range Default Description S11 100 mSec 0 255 7 S10 sets the time a carrier signal must be lost before the modem disconnects The default setting is 700 mSec or seven units Decimal 7 of 100 mSec Maximum delay is 25 4 seconds Decimal 254 Setting the S10 value to 255 causes the modem to not disconnect with loss of carrier This S Register applies at speeds of 2400 bps and less Tone Dialing Tone Spacing and Duration Unit Range Defaul
17. ETIN 38 Extended Result Codes 34 Listing Current Operating Parameters L5 L7 46 Listing Delayed Phone Numbers RLD Command99 F Listing Forbidden Phone Number RLF Command99 Listing Numbers Stored in Memory L 31 ratr aih PGR aseetita zd Listing On Line Diagnostics L8 46 ue Daw Sas en Falbeck Modes When Online E as SINO S Register Yates 6 ecce gp dt Ee MITTENTE SEIT 19 Local Inactivity Timer s 64 Fax and Communications Software Won t Run 86 Long Space Disconnect Y 29 PREMPGURIO cina 10 Losing BIS etm 85 FCC Part 68 Telecom regulation 103 File transfer protocols eet 20 M firmware Urania 79 105 Maximum Throughput Setting 68 flash memo ocius cans Sepe pia lai 79 Memory Fash On Hook Wii 30 Nonvolatile NVRAM n 19 Flash Wizard upgrade utility 80 MNP D iecit etre ct exte bte te ana 85 PS OA NRI 66 Model Numbers een 9 ms aeo i PUENTE 85 Modem Baud Rate MB 44 Flow Control amp E4 amp E5 in 66 Modem Cannot Connect When Answering 85 Force Answer Mode A 47 Modem Dials But Cannot Make a Connection 84 FOCE 66 Modem Disconnects While Online 85 Frequency Stability
18. Guide MuttiTech Figure 2 1 Unpacking Your package should include MT2834BA data fax modem RJ 11 telephone cord AC Power Transformer One 1 Quick Start Guide One 1 software CD PhoneTools data communications and fax software This User Guide on diskette If any of these items are missing contact Tech Support Installation The installation of the modem consists of making the physical connections necessary to render the modem functional with your computer This includes making the proper serial phone line and power connections Unless otherwise noted these instructions apply to all models of the BA series Chapter 2 Installation and Connection 2 2 1 Safety Warnings oo mw 8 Use this product only with UL and cUL listed computers To reduce the risk of fire use only 26 AWG 41mm or larger telephone wiring Never install telephone wiring during a lightning storm Never install a telephone jack in wet locations unless the jack is specifically designed for wet locations Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface Use caution when installing or modifying telephone lines Avoid using a telephone during an electrical storm There is a risk of electrical shock from lightning Do not use a telephone in the vicinity of a gas leak 2 2 2 Installation Procedure The following procedures will guide yo
19. Modem Restrictions 105 Defaults roe eec prepa eese e 19 Iitemert addas s uri ici atei TZ Parity OE OOO IM Ear R 18 Parity Selection P ii 43 Password Command Summary 94 107 MultiModemBA User Guide Pause Time for Comma sss 51 PBX CBX Disconnect Drop Time for DSR CTS CD53 PBX CBX SVSICINS usce rtr tdi 53 POWEl 10 POWEFSUPpplVisc ssnra iaia 82 Program V 34bis Connect Speeds 55 Program V34 Connect SpeedsS 55 Protocol reader 20 85 Pulse or Tone Dial P T i 28 Q Quiet Answer ntra 30 R Reading of Line Probe Information Commands 48 registering your product eesssuusss 76 Reliable Mode amp E2 in 38 Remote Configuration Character 63 Remote Configuration Escape Character 52 Remote System Configuration 19 replacement parts esses Vara Request To Send Forced 69 Res l CodeS acli 18 84 Result Codes Enable Disable and No Response Q 33 Result Codes Verbose Terse V 33 Retransmit Count R sensara 40 Return Character acc ocio eterni 50 Return Character eese petii etae rire 18 Return to Command Mode After Dial Execution 29 Reverse the Mode of Operation R 29 Rin
20. RS 232C interface is required in order for the modem to operate A high DTR signal tells the modem that the device to which it is connected is active or ready to communicate through the modem If the signal is not being provided on the RS 232C interface you can force DTR high with DIP Switch 1 DTR has some other modem functions DTR can be used to trigger a dialing sequence called DTR Dialing The condition of DTR can also be used to cause the modem to reset to its default parameters just as if you had given the modem an ATZ command To do this enter the command AT amp D3 and hit RETURN The modem will now reset itself whenever DTR is dropped from On to Off and will also go on hook hang up if it is on line Entering AT amp DO or AT amp D causes the modem to ignore DTR Entering AT amp D1 causes the modem to go on hook hang up with loss of DTR The modem enters Command mode when DTR goes high again Auto answer is disabled while DTR is low Entering AT amp D2 causes the modem to go on hook with loss of DTR The modem enters command mode when DTR goes high again CTS Control amp R The amp R command allows you to control the Clear to Send signal CTS Pin 5 on the RS 232C interface You have three choices You can force the CTS signal high allow it to act normally or set it to stay high until the modem disconnects go low momentarily and then go high again The last option is useful with some CBX phone systems and mainframe front e
21. VD1 command is entered when in Auto Answer mode the modem answers immediately upon receiving the first ring There is no disconnect message NO CARRIER if a normal connection is made V 25bis Set Up and Initialization Before you operate your modem in the V 25bis mode you need to make sure it is set up properly various RS 232 lines such as DSR and CTS act as specified in the V 25bis standard Setup involves proper DIP Switch settings and soft switches software controlled conditions V 25bis DIP Switches 1 Unforced DTR 2 NA 3 NA 4 NA 5 Auto Answer enabled 6 Async Max throughput set Sync Slave Clocking unforced 8 Command Mode forced 9 Digital Loopback Off 10 Dial Up 11 Async AT Multi Tech Resp 12 Async Sync mode set per requirements V 25bis Mode AT Commands The following commands will either alter standard V 25bis behavior so you must be careful in their use or they are not allowed as indicated All other commands can be used in V 25bis operation Not Allowed Not Allowed Not Allowed Not Allowed Not Allowed Alters Operation D1 in V25bis is direct call mode Alters Operation Alters Operation removes modem from asynchronous V 42bis mode Not Allowed Not Allowed Not Allowed Not Allowed Not Allowed Not Allowed Not Allowed Alters Operation XO no connect message X1 connect message Not Allowed Not Allowed Not Allowed z xzcdvozzemgoo re AT lt CR gt N
22. a BREAK signal is used instead of the three plus signs The BREAK is followed by the letters A and T up to 60 command characters and RETURN When this is done the modem executes that command but remains in On Line mode unless the command was to hang up and or reset the modem an H or Z in which case the modem would be in the Command Mode after executing that command Escape Sequence Options Entering Command Mode While On Line E As mentioned the default escape sequence setting is for the modem to respond to the escape method Optional settings are for the modem to respond to the Break method for the modem to respond to either the or the Break Methods for the modem to ignore both methods and not escape for the modem to respond with no OK to and for the modem to respond with OK to The E command is used to select these options as follows EO Modem Won t Escape E1 AT lt CR gt Method default E2 Break Method E3 Either or Break Methods E4 No OK Response to E5 OK Response to The E4 and E5 commands enable or disable an OK response which is required by some software packages during an escape sequence Force Answer Mode A You can force the modem into Answer mode with the modem s A command Entering ATA when in Command mode immediately brings your modem off hook out of Command mode and into On Line Answer mode and causes it to transmit its carrier signal over t
23. a value of 30 enter ATS0 30 and hit RETURN 3 Ina third example let s say you are calling long distance to another country code and it is taking a long time to connect The S Register S7 Abort Timer setting of 45 seconds is insufficient The abort timer times out and cancels the call before a connection is made To change the S7 value to 55 seconds enter Command mode then enter ATS7 55 and hit RETURN Now after dialing the modem allows 10 more seconds for a carrier signal before aborting the call The additional 10 seconds should provide enough time for international calls 5 2 2 Examples of Reading Values To verify that you entered the value correctly in the above examples enter ATS8 and hit RETURN in the first example ATSO in the second and ATS2 in the third example You should receive the response 005 in the first example 030 in the second example and 055 in the third example When configuring the S Registers it is a good practice to include the verification read entry in the same command line as the configuration assignment entry In the three preceding examples enter ATS8 5S8 ATS0z30S3 and ATS7z55S72 AT Command and S Register Summary The vast majority of installations are similar with the modem being used to dial up a remote installation where the call is automatically answered Your modem has a default configuration to dial another modem that supports error correction data compression and flow control If the a
24. also activated The X command is also used to select which dialing method is used Five different X commands are available XO through X4 with five different effects on the modem s Result Codes XO Provides the basic short result codes and provides dumb dial capabilities X1 Provides the extended result codes and provides dumb dial capabilities The remaining X commands affect Call Progress and turn on Extended Result Codes X2 Looks for dial tone only and will not provide a busy response X3 Looks for busy only and not look for dial tone X4 Looks for dial tone and for busy The factory default setting is X0 which selects Basic Result Codes and the blind dumb method of dialing 4 4 6 Phone Line Conditioning Commands Guard Tones Not Used in BAI Models amp G The amp G command is used to control the presence or absence of guard tones from the transmitter when in Answer mode at either 1200 or 2400 bps Guard tones are used in Europe and other areas for the modem to function in the telephone systems Guard tones are not used in the United States amp GO default turns off CCITT guard tones amp G7 turns on 550 Hz guard tones amp G2 turns on 1800 Hz guard tones This command is not used in international models Chapter 4 Command Mode Bell V 21 Tone B The B command selects the frequency that the modem uses for its answer tone The answer tone is the tone transmitted by a modem receiving a call to the modem
25. amp F command can also recall those defaults stored under amp WO This is done using the amp F9 command If you have stored parameters with the amp W0 command and wish these settings to always be used as your defaults you would enter amp F9 amp WO To return the amp F command to read factory installed defaults enter amp F8 amp WO amp F8 is the factory default Many datacomm program issue the amp F command automatically the amp F9 command allows the user to select their own factory defaults Note that the amp F8 amp F9 commands should be used with amp WO Following is a summary of how the amp F and Z reset commands interact with the amp W command note how the amp F reset command operates differently from the Z reset command Previous Command AT amp F Power On and ATZ AT amp W1 default ROM ROM AT amp WO ROM NVRAM AT amp F8 amp WO0 ROM NVRAM AT amp F9 amp WO NVRAM NVRAM Modem Reset Z The Z command can be used to reset the entire Command Mode buffer and the result is the same as if you had disconnected and then reconnected power to the modem When an ATZ command is executed the state of the amp W command determines where the default values originate amp WO defaults come from RAM and amp Wf1 defaults come from ROM Unix UUCP Spoofing SP The modem can be configured in a Unix environment that employs ACK flow control as a means of monitoring data integrity The modem can do UUCP spoofing where the modem
26. and DSR forced On Switch 15 DOWN Factory Default Setting UP Switch 16 Reserved for Future Use Speaker Volume Control You can adjust the volume of the modem s phone line monitor speaker with a volume control knob located on the back of the modem next to the RS 232C connector see Figure 9 1 for location Turn the knob clockwise to increase the modem s volume and counterclockwise to decrease speaker volume 71 MultiModemBA User Guide 7 4 72 Recording Option Configurations This section lets you record any changes you may have made to the DIP Switch settings Circle the appropriate setting and record the effect for future reference DIP Switches Switch Function 1 Force DTR DTR from Interface 2 Flow Control amp E4 amp E5 Async Dial Up Leased Line 2 SDLC BSC Sync 3 Result Codes Enable Disable Async Dial up 3 DbM Transmit 9db 0dB 15db 10dB Async Sync Lease Line 4 UUCP Enable Disable Async Dial Up Leased Line 4 AS 400 Enable Disable Sync Dial Up Leased line 5 Auto Answer Enable Disable Async Sync Dial Up 5 Answer Originate Async Sync Leased Line 6 Max Thru Enable Disable Async Dial Up Leased 6 Slave Clock Enable Disable Sync Dial Up Leased 7 RTS Normal Forced Sync Async Dial Leased 8 Command Mode Enabled Sync Async Dial Leased 9 Local Remote LoopBack Async Sync Dial Leased 10 Dial Up Leased Line 11 AT Multi Tech Result C
27. as high as 33 6 31 2K bps in full duplex mode Enhanced V 34 is an extension of V 32 V 32bis V34 standards and supports and is compatible with those features including EIA extended Automode adaptive line probing automatic symbol rate and carrier frequency during start up and retrain and rate renegotiation in 2400 bps increments The MT2834BA features ITU V 25bis standard for synchronous dialing ITU V 42 error correction and V 42bis data compression providing 100 error free data transmission V 42 error correction incorporates MNP Classes 3 and 4 and LAP M You may select V 42bis data compression for 4 1 throughput or MNP Class 5 for 2 1 throughput Fax Features Your modem meets the ITU V 17 standard for sending and receiving faxes When linked to a compatible fax machine or modem it can transmit faxes at 14 4 K bps It also meets the ITU s Group 3 Designation for sending and receiving faxes at 9600 bps and Group 2 Designation for sending and receiving faxes at 4800 bps The modem is also downward compatible with modems to speeds as low as 300 bps so it can send and receive faxes with any fax machine in the world 1 5 Chapter 1 Introduction and Description Technical Specifications Your data fax modem meets the specifications listed below Tradename Model Numbers Data Rates modem Data Rates fax Data Format Compatibility Error Correction Data Compression Speed Conversion Flow Control Options
28. both security level codes to your unique settings The Callback Passwords and dial back phone numbers are in a special Callback Password dial back phone number memory 30 numbers long You use the modem s LOGIN Password and the Set Up Password plus special Callback commands to access this memory The memory is thirty numbers long and replaces your modem s normal phone number memory Each number is 35 characters long and can contain commands as well as phone numbers You need to set up your modem with the numbers and codes as part of the dial back initialization procedures Your modem will also remember if the incoming call was reliable or not and make the call back accordingly Remote Configuration Description The Remote Configuration feature is a network management tool that allows you to configure modems remotely This means you could configure modems anywhere in your network from one location without having to visit the sites or rely on remote users to follow your instructions With Remote Configuration which is protected by two level security you can download new parameters program new V 42 capabilities and implement new features Remote Configuration also makes troubleshooting a remote location a lot easier The way Remote Configuration works is that S Register S13 has been set up to contain the special Remote Configuration escape code When calling a Remote Configuration equipped modem you enter the proper Remote Escape code to enable
29. but also enables incremental fall forward if the phone line improves AT F2 is the factory default setting 35 MultiModemBA User Guide 36 Enable Disable Lowspeed Fast Connect FC Entering AT FC0 amp W0 lt CR gt sets up the data pump so that it will not transmit a 5 second 2100 Hz signal Entering AT FC0 amp W0 lt CR gt allows the modem to transmit a 5 second 2100 Hz signal and is the factory default Cleardown at Disconnect amp CD The amp CD command is used for control of cleardown at disconnect in V 32 V 32bis V 34 and V 34 enhanced modes A cleardown usually adds 1 2 seconds to the time it takes for the modem to go on hook after a disconnect A cleardown makes a disconnect by the remote modem easier to detect and a subsequent re connection more likely Enter AT amp CD0 amp WO0 lt CR gt to execute a cleardown at disconnect default and enter AT amp CD1 amp W0 lt CRs to disable the cleardown function Auto Speed Detect A The function of the ZA command is to detect and select the operational data rates the starting speeds with which the modem uses for initial handshake and speed selection Remember this command does not control the originating data rate of the modem that is done by the Modem Baud Rate command MBn but only the Answer mode starting speeds Entering ATZAO or ATZA causes the modem to operate starting at 33 600 bps with fallback to 28 800 to 19 200 to 14 400 to 9600 to 4800 to 2400 to 120
30. commands or to the toggling of the RTS Request to Send signal on Pin 4 of the RS 232C interface depending on what you selected earlier as your Modem Initiated Flow Control method Maximum Block Size amp BS The maximum size of Reliable mode data blocks can be controlled with the amp BS command MNP 3 sends blocks of 1 to 64 characters MNP 4 and 5 typically send blocks of 1 to 256 characters and LAP M typically send 128 characters For MNP Classes 4 and 5 LAP M reducing the block size to 64 characters may give a smoother flow of data and better throughput on noisy phone lines Using smaller block sizes over good phone lines may cause a slight loss in throughput speed AT amp BSO Maximum transmit block size of 64 characters AT amp BS1 Maximum transmit block size of 128 characters LAP M 256 characters MNP The factory default setting is amp BS7 Chapter 4 Command Mode Parity Selection P The P command enables the setting of parity AT PO selects no parity ATZP1 selects odd parity AT P2 selects even parity and is the default value Note when setting up your data comm software it is critical that both your remote and local system s parity selection be set identically AT PO no parity AT P1 odd parity AT P2 even parity The factory default setting is ATZP2 4 4 10 Compression Error Correction Flow Control Pass Through and Pacing Commands The modem has a variety of commands to control its error correction
31. country may establish specific regulations governing the way operations are handled The purpose of this document is to detail each country s specific regulations that affect operation of V 25bis in Multi Tech modems 1 Italy a Command Indication modifications 1 Phone number indications include status ZPSTTT a Z U D or F for Unrestricted Delayed or Forbidden b P Delay time if delayed C S Number of retries so far d TTT Interdiction time to further attempts b Delayed and Forbidden list behavior 5 retries without delay 2 minute delay between next 4 retries After 9 retries the number is put on the forbidden list 120 minute timer is started on entry to delay list When it runs out the number is removed from which ever list it is on uto Answer mode behavior Auto Answer in 5 seconds if no DIC Get 10 seconds after DIC to enter CIC If 10 seconds times out then no connection is possible ON PAIASWN 2 Switzerland a Command Indication modification 1 Modem must remain on hook for 5 seconds after disconnect 2 Modem must remain on hook for 5 minutes after 4 consecutive failed calls 3 If modem must remain on hook then it is paused 4 If the modem is paused and a call is attempted a PAU indication is given a PAUt Modem is paused for t minutes b Delayed and Forbidden list behavior 1 2 minute delay between 4 retries 2 After 4 retries the number is put on the forbidden list 3 The number remains on the forbidden list
32. executed you modem will undergo some significant changes For example the phone number memory locations NO through N9 will be used for passwords and phone numbers In other words you will not be able to dial from memory or use the DTR dialing feature You can turn on callback security by typing AT DB1 or AT DB2 and pressing CR If you want to engage both remote and local password security use the ZDB1 command This sets up the modem so you have to provide passwords to dial into the modem and to dial out For remote password security only use the ZDB2 command This allows the local operator to dial out without providing the LOGIN and SETUP passwords Use DB3 when calling another modem with callback security active Change LOGIN Password l The default LOGIN password for your modem is MULTI TECH If you choose to activate callback security you should change the LOGIN password using this command in the following format AT IXXXXXXXXXX lt CR gt where XXXXXXXXXXXXXXXx is the current LOGIN password Your modem will respond with OK indicating that you can enter the new LOGIN password as follows AT I yyyyyyyyyy lt CR gt You can select any combination of keyboard characters upper lower case sensitive between six and ten characters long 6 5 Chapter 6 Callback Security and Remote Configuration Change SETUP Password S The default SETUP password for your modem is SMODEMSETUP If you choose to activate callback secu
33. mode The factory default setting is Command mode enabled Disable Command Mode Switch 8 UP Enable Command Mode Switch 8 DOWN Factory Default Setting DOWN Switch 9 Digital Loopback Test Asynchronous Synchronous Mode Leased Line Dial Up When in Synchronous mode this switch controls both Local Digital Loop and Remote Digital Loop tests while on line When the Voice Data switch is toggled to the Answer mode position UP and DIP Switch 9 is in the UP position the modem performs the Local Digital Loopback test When DIP Switch 9 is DOWN and the Voice Data switch is toggled to Answer mode position UP the modem performs the Remote Digital Loopback test Local Digital Loopback Test Switch 9 UP Remote Digital Loopback Test Switch 9 DOWN Factory Default Setting DOWN 69 MultiModemBA User Guide 70 Switch 10 Leased Line Dial Up Operation DDD Asynchronous Synchronous Mode Leased Line Dial Up The modem operates in either leased line or dial up modes This switch controls leased line dial up operation Place DIP Switch 10 in the UP position for Dial Up operation Place DIP Switch 10 in the DOWN position for Leased Line operation Dial Up Operation Switch 10 UP Leased Line Operation Switch 10 DOWN Factory Default Setting UP Switch 11 AT Responses Multi Tech Responses Asynchronous Mode Leased line Dial Up In Asynchronous mode you can set the modem to respond with Result Codes according
34. number This is called linking To link the number in N1 to the number N2 simply enter ATN1N2 and hit RETURN Several numbers can be linked in the same command For example you could link N1 to N2 to N3 to N4 by entering ATN1N2N3N4 and RETURN or you could link N1 to N2 and back to N1 and then back to N2 by entering ATN1N2N1N2 and RETURN The only limit on the number of numbers that can be linked is the 60 characters allowed in a command line Number linking can not be used with blind dialing since busy signals would not be detected You would have to select the Wait for Dial tone dialing method using the X Command in order to use the Number Linking feature Listing Numbers Stored in Memory L Telephone numbers that you have stored in the modem s memory may be listed and displayed with the L command It will display all ten stored N numbers in a format like that shown below All digits and command letters will be shown The number s name 0 thru 9 is shown first followed by the complete dialing command and telephone number as originally entered Simply enter ATL and hit RETURN to display these numbers on your video screen or printer An example of an L command listing is shown below DT14082345678 DT16125551212 DP9 T14089876543 DT3738315 12101 16126313550 DT6313551R DP9 4258513 DTX4 amp E1 amp E5 amp E13 amp E15DT16126313550 DT12138880123 904 0 AWBH 4 4 4 Configuration and Default Storage Commands Store Con
35. of the diagnostics listing and checking for parameters that may be unacceptable number of retrains round trip delay etc My Fax and Communications Software Won t Run at the Same Time Communications devices can be accessed by only one application at a time Under DOS or Windows 3 1x you can run either your fax software or your datacomm software but not both at the same time unless you have a special communications device management application such as Multi Tech s Virtual Modem Driver In Windows 95 you can have data and fax communication applications open at the same time but they cannot use the same modem at the same time Apendix C AT Command Summary Command Values AT RETURN A A An n Oor1 An n Othru3 2 Bn n Oor1 amp Bn n 2 Oor 1 E amp BSn n 2 Oor 1 BAn n Oor1 amp Cn n 0 1 2 4 amp CDn n Oor1 Ds s phone Appendix C AT Command Summary Description Attention Code that precedes most command strings except A A and Escape Codes Pressing RETURN key executes most commands This symbol placed in dialing string enables the modem to detect AT amp T s call card tones for accessing user s calling card to originate an on line connection Answer call even if no ring present Repeat last command Do not precede this command with AT Do not hit RETURN to execute Continuous redial 10 redials in DOC units of last number until answered Not used Internationally A0 discard
36. tassa 39 AS 400 MODE ssi 67 ASCI BOGB ara 18 Asynchronous Word Lenth Selection EB 43 Asynchronous Synchronous Operation 70 Die T 18 AT Command and S Register Summary 56 AT Commands osse eive aep te rea EOS RR EUER 23 AT Responses Multi Tech Responses 70 AU O ANSWET oett ra 18 19 Auto Reliable Buffering A 39 Auto Reliable Mode amp E1 38 B Backspace Character in 51 Basic Result Code ictor ato retis 34 Basic Extended Result Codes 34 Baud Adjust BBA 5 3 5 2 2 reto teet eee 44 Baud rate SEA POR sine 19 Bell 2 TONG pata alain 35 BREAK AT lt GRS uiuit iie eas 47 Buffer Length of Command Mode After On line ESCA p 54 Bulletin board systems ss 20 C Gall Wallin EE 85 Callback Attempls iecur nenna 58 Callback Operational Sequence Procedures 61 Callback Password and Dial Back Phone Number pi ES 60 Callback Retry Attempts 63 Callback Security Enable Disable DB 62 Callback Time Delay ssse 53 63 Calling Card Detect Tones 30 Canadian Limitations Notice 104 Carrier Detect Control amp C 36 Carrier Detect Response Time 5
37. that called it which initiates the handshaking between the two modems At higher speeds there is no conflict because all use CCITT frequencies At lower speeds 0 1200 bps in the U S some modems use the Bell frequency of 2225 Hz However the CCITT specification for V 22 has an answer tone frequency of 2100 Hz The ATBO command enables CCITT frequencies including V 21 300 bps and V 23 1200 75 bps The ATB1 command enables Bell frequencies including Bell 103 300 bps The modem default is ATBO Phone Line Monitoring Speaker M The modem has an internal on board speaker which functions like the speaker in a telephone handset to enable you to monitor phone line activity The M command can be used to determine when the speaker is operational Entering ATMO disables the speaker completely while ATM1 causes the speaker to be on only until a carrier signal is detected ATM2 causes the speaker to remain on at all times ATMS causes the speaker to be on during dialing and off during handshake ATMT7 is the default setting and the one that should be used in most applications Enable or Disable Recognition of Remote Digital Loop Signal amp T The modem has several self test features covered in Chapter 8 The tests are activated with different U commands such as ATUI and so forth The amp T command is a phone line conditioning command that enables or disables the modem s ability to recognize the Remote Digital Loop RDL test signal
38. the first modem or power supply may be defective Call Tech Support for assistance CAUTION Do not under any circumstances replace the power supply module with one designed for another product as it may damage the modem and void your warranty The Modem Does Not Respond to Commands e Make sure the modem is plugged in and turned on See None of the LEDs Light When the Modem Is On e Make sure you are issuing the modem commands from the data communications software either manually in terminal mode or automatically by configuring the software You cannot send commands to the modem from the DOS prompt e Make sure you are in terminal mode in your data communications program then type AT and press ENTER If you get an OK response your connections are good and the problem likely is in your phone book entry or session settings e Try resetting your modem by turning it off and on Make sure there is a reset command amp F in your initialization string or your modem may not initialize correctly Appendix B Troubleshooting If you don t get an OK the problem may still be in the communications software Make sure you have done whatever is necessary in your software to make a port connection Not all communications programs connect to the COM port automatically Some connect when the software loads and remain connected until the program terminates Others can disconnect without exiting the program make sure the Connect icon looks
39. to the Multi Tech command response set Switch 11 in the DOWN position or to AT command response set Switch 11 in the UP position The amp Q command performs the same function choosing AT or Multi Tech Result Codes and is explained further in Section 5 3 of this manual AT Responses amp Q1 E Switch 11 UP Multi Tech Responses amp Q0 Switch 11 DOWN Factory Default Setting DOWN Switch 11 Internal External Clocking Synchronous Mode Leased Line Dial Up In Synchronous mode the transmit clock can be supplied by the DTE on pin 24 of the RS 232C V 24 interface by placing DIP Switch 11 UP Place DIP Switch 11 in the DOWN position to enable DCE to control clocking internal clock via pins 15 and 17 of the RS 232 V 24 interface External Clock pin 24 Switch 11 UP Internal Clock pins 15 17 Switch 11 DOWN Factory Default Setting DOWN Switch 12 Asynchronous Synchronous Operation Sync Asynchronous Synchronous Mode Leased Line Dial Up The modem can operate in either Asynchronous mode or Synchronous mode In Synchronous mode start and stop bits are eliminated The modem s internal clock circuits on the RS 232C V 24 pins 15 and 17 are activated The modem s Command mode is not accessible in Synchronous mode This switch is a means to alternate and to access either mode In Synchronous mode you may want to set the RTS forcing and CTS forcing DIP Switches so that both of signals act normally not force
40. with your password you can also enter a phone number which you wish the Callback modem to dial after hanging up The and characters must be entered after the Dial back password i e DB gt xxxxxx This is also the point where you enter an extension number if your Callback number used the feature Step 5 in Table 6 2 You have three tries at each prompt to enter the information properly with an incorrect entry resulting in a password retry You must enter the requested information correctly within one minute or the Callback modem will hang up When the information is entered properly the called modem will hang up and after a 15 second delay call you back When your modem answers the dialback modem will respond with the following Password 4 Enterthe modem s LOGIN Password again the same as in Step 1 The Callback modem responds with CONNECT You are now in Data Mode 6 3 2 A Remote Configuration Procedures The procedures for using the Remote Configuration features are the same whether or not a call originates from the remote modem Once the modem is on line perform the procedures in Table 6 4 Table 6 4 Remote Configuration Operation Procedures Step Procedure 1 Remote Escape Configuration requires AT lt CR gt to be sent if the default value in S Register S13 has not been changed The modem responds with 1 DATA Mode 2 COMMAND Mode 61 MultiModemBA User Guide 6 4 62 2 You then select
41. 0 and to 300 bps Entering ATZA1 causes 33 600 bps operation only Entering AT A2 causes the modem to operate at starting speeds of 33 600 bps with incremental fallback to 28 800 19 200 14 400 9600 and 4800 bps The AT A3 command causes the modem to begin operation as a V 22bis modem at 2400 bps with fallback to 1200 to 300 bps ATZAO is the factory default value 4 4 7 RS 232C Interface Control Commands Carrier Detect Control amp C The amp C command allows you to control the status of the Carrier Detect signal CD Pin 8 on the RS 232C line You have four choices You can force the signal high or allow it to act normally or force the modem to reset when CD drops or set it to stay high until the modem disconnects go low momentarily and then go high again The last option is useful with some CBX phone systems and mainframe front ends which require CD to act in this manner To allow CD to act normally enter the command AT amp C7 the factory default setting To force CD on enter AT amp CO To reset the modem to its current parameters when CD drops enter AT amp C4 To set up CD so that it drops for one second on disconnect and then comes up again enter AT amp C2 If you want the drop time to be something other than one second use S Register S24 to change this value Refer to the Chapter 6 instructions for S24 Chapter 4 Command Mode Data Terminal Ready Control amp D Data Terminal Ready DTR on pin 20 of the
42. 14 UP DOWN 14 4 K bps Operation 13 14 DOWN DOWN 9600 bps Operation DIP Switches 15 16 SWITCH CONDITION EFFECT 15 UP CD DSR from Interface 15 DOWN CD DSR Forced On 16 UP Not Used 16 DOWN Not Used Standard Factory Default Setting 73 Multi L z Chapter 8 Warranty Service and Tech Support Multi lech Systems Chapter 8 Warranty Service and Technical Support 8 1 Introduction This chapter starts out with statements about your modem s 5 year warranty The next section Tech Support should be read carefully if you have questions or problems with your modem It includes the technical support telephone numbers space for recording your modem information and an explanation of how to send in your modem should you require service The final four sections explain how to use our Bulletin Board Service BBS upgrading the modem via Flash PROM a brief section on the CompuServe Internet forums and information on Multi Tech s Fax Back Service 8 2 Multi Tech Systems Inc Warranty amp Repairs Policies Warranty Multi Tech Systems Inc hereafter MTS warrants that its products will be free from defects in material or workmanship for a period of two five or ten years depending on model from date of purchase or if proof of purchase is not provided two five or ten years depending on model from date of shipment MTS MAKES NO OTHER WARRANTY EXPRESS OR IMPLIED AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY
43. 2 Carrier Detect DSR Forcing 71 Carrier Loss Disconnect Delay Time 52 Change LOGIN Password tl 62 Change Serial Baud Rate CSP Command 98 Change SETUP Password 8 63 Changing Break Time i 53 Cleardown at Disconnect 36 COM ports Be rm 19 106 COMM DRV iii 85 Command BUET iced ola aio 9 Command Mode ederet eit eed edere aede 22 Cormrniaridisttiig saepe iaia 18 Command Summary sese 87 Commands Attenti ON COA sicir 18 Load default configuration 19 Modem reset 18 Compatibility sonn a nancies ieee 9 Computer or Terminal Initiated Flow Control Pacin 43 GGONME CONS ce iaia 10 Continuous Redial A or irie 27 Controls 10 GIS Control QA onene niece 37 CTS RTS Interaction Control amp RF 37 D Data COMPFESSION crisi 9 Data Compression Commands 43 Data elim 9 Data Rates nia di pae eem ec s edet 9 Data Set Ready Control amp S 37 Data Terminal Ready Control amp D 37 Datacomm software 18 19 20 82 Configuration esesseeeeee 18 19 dB Transmission Levels 67 Delayed and Forbidden Numbers 96
44. 24 6340778 U K support multitech co uk 44 118 959 7774 U S A Canada tsupport multitech com 800 972 2439 Rest of world tsupport multitech com 763 717 5863 Please note the status of the modem before contacting Technical Support Status information can include the state of the LED indicators screen messages diagnostic test results problems with a specific application etc Internet Sites Multi Tech is a commercial provider on the Internet Multi Tech has a Web site at http www multitech com and an ftp site at ftp ftp multitech com 77 Multi Appendixes Multi c 9 ystems Appendix A Upgrading Your Modem s Firmware Appendix A Upgrading Your Modem s Firmware Your modem is controlled by semi permanent software called firmware which is stored in flash memory Firmware is nonvolatile that is it remains stored in memory when the modem is turned off However it can be changed by either the manufacturer or the user as bugs are fixed or new features are added Since the firmware in your modem is stored in flash memory you can upgrade it yourself in a few minutes by using the following procedures Upgrade Overview The upgrade procedure consists of the following steps which are described in greater detail in the following sections Identify the model number and firmware version of your modem N Identify the current version of the firmware at the Multi Tech Web site or BBS If your mode
45. 42 error correction capabilities during all transmissions and must be connected to another modem with a similar protocol activated MNP or LAP M V 42 Mode Select L The V 42 standard implements both MNP Class 3 amp 4 and LAP M error correction methods The V 42 Mode Select command ZL selects which type of error correction MNP or LAP M your modem uses for transmissions The various ZL command options are as follows Chapter 4 Command Mode L0 Command The L0 Command allows a pair of modems to negotiate which V 42 mode MNP or LAP M will be used in their transmissions Originate Mode a If both modems have LAP M capability the modems use LAP M mode b If one or both modems do not have LAP M capability and both have MNP the modems use the MNP mode Answer Mode a The answering modem responds to either an MNP Link Request or LAP M Originator Detection Pattern ODP signal depending on which the originating modem issues L1 Command The L1 Command sets your modem to MNP error correction and disables LAP M This command is for Originate mode only In Answer mode the modem still accepts MNP or LAP M L2 Command The L2 Command sets your modem to LAP M error correction and disables MNP This command is for Originate mode only Answer mode still accepts MNP or LAP M L3 Command In the prior commands the modems use a two phase process to establish a V 42 connection detection to establish whether the remote modem
46. 85 92501 cada 19 8250A stanca 19 UniX UUCP Spoofing tina 68 Unix UUCP Spoofing SP etes 32 upgrading the modem iii 79 105 V V 25bis Mode AT Commands 97 V 25bis AT Commands sss 98 Vesbis Operations 96 V 25bis Responses Result Codes 98 V 25bis Set Up and Initialization 97 V 42 Mode Select L in 38 VAPDIS m 19 W Wait for New Dial Tone W 29 Wait Time for Dial TONO 51 Wait for Carrier esses 22 WEFAN sona legngiia nia 104 lujo mee ra eli ria 10 WINDOWS SN e leon 85 serial port driver ett TES 85 Windows 95 Autodetect Inquiry Command I9 46 Windows 95 HyperTerminal 85 X Pn E 85 Xon Xoff Flow Control amp E5 41 Xon Xoff Pass Through amp E7 41 Xon Xoff Pass Through Commands 43 Index Y b o de alain 85 Z Faser eR 85 109
47. Chapter 1 Introduction and Description This chapter begins with a short introduction followed by a guide which you are now reading to the use of this manual There is a discussion about what components you can expect in your modem package We then provide a more detailed description of the modem including the modem s technical specifications Chapter 1 includes sections covering power LED indicators and a brief summary of PC board controls Chapter 9 covers switch settings more thoroughly Chapter 2 Installation and Connection Chapter 2 covers the procedure for connecting the modem to your computer and to the phone line Details are given supported by illustrations on the modem s back panel connections as a guide to install your modem to the point of operation In addition this chapter describes the installation of PhoneTools the communications software included with your modem Chapter 3 Software Configuration and Modem Basics Chapter 3 documents communication software configuration recommended specifically for the MultiModem Other issues covered include setting up initialization strings changing default parameters configuring software for the remote system and file transfer protocols Chapter 4 AT Command Mode Operation Chapter 4 may be the most important chapter of this manual It begins with an introduction and discussion on Command Mode fundamentals A flow chart is provided to illustrate Command Mode and On Line Mode
48. DT5551212 and hitting RETURN If neither Pulse nor Tone dialing is specified in the dial command the modem uses whatever method used last If the modem has been reset or just powered up it uses Pulse dialing even if the letter P is not included in your dial command Nearly all telephone systems in the U S are now compatible with tone dialing Since that is the faster method you will probably choose the tone method for your dialing An example of combining pulse and tone dialing could involve a PBX system where 9 had to be pulse dialed first then the rest of the number tone dialed after pausing for a second dial tone The number would be dialed by entering ATDP9 T5551212 and RETURN The comma causes a pause which we ll explain soon Chapter 4 Command Mode Set Pulse Dial Ratios amp P This command sets the time ratios between the open and closed portions of the dialing pulse frequencies To set the dialing pulse ratio of 60 mSec to 40 mSec enter AT amp PO To set a ratio of 67 mSec to 33 mSec enter AT amp P1 The factory default is amp PO Automatic Pauses in Dialing You can cause the modem to pause during the dialing sequence by entering a comma character where the pause is desired This pause lasts two seconds If a longer pause is desired more than one comma may be entered consecutively with each comma causing a two second pause You also have the option of changing the length of the pause caused by the comma from two seco
49. Diagnostics L9 Displays Signal Strength Information L10 Displays Signal to Noise Ratio Information L11 Displays Noise Information LO means modems negotiate V 42 Mode L1 means MNP on and LAP M off L2 means LAP M on and MNP off L3 means no detection phase but go directly to LAP M MO means Monitor speaker always Off M1 means Monitor speaker On until carrier detected M2 means Monitor speaker always On M3 Monitor speaker on during dialing off during handshaking 89 MultiModemBA User Guide MBn n speed amp Mn n 2 Oor 1 Nd dzOthru 9 NdNe d 0thru9 e any other number 0 thru 9 O P amp Pn n 2 Oor 1 T Qn n 0 10r2 i amp Qn n 2 Oor 1 Hn n Oor1 i amp Rn n 0 10r2 amp RP Rn n Oor1 amp RFn n Oor1 Sr n r 0 11 13 15 19 24 26 29 30 32 34 Sr r 0 11 13 15 19 24 26 30 32 or 34 90 MB75 selects CCITT V 23 mode MB300 selects 300 bps on line MB1200 selects 1200 bps on line MB2400 selects 2400 bps on line MB4800 selects 4800 bps on line MB9600 selects 9600 bps on line MB14400 selects 14400 bps on line MB19200 selects 19200 bps on line MB28800 selects 28800 bps on line MB33600 selects 33600 bps on line amp MO selects Async when on line amp M1 selects Sync when on line Dial stored telephone number d Do not include the letter D in this command Number Linking If first number dialed is busy another stored number may be automatically dialed In examp
50. Mode of Operation Intelligent Features Command Buffer Modulation MultiModem MT2834BA MT2834BAI 33 600 31 200 28 800 26 400 24 000 21 600 19 200 16 800 14 400 12 000 9600 7200 4800 2400 1200 0 300 bps 14 400 9600 7200 4800 bps Serial binary asynchronous at 0 300 1200 2400 4800 7200 9600 12 000 14 400 16 800 19 200 21 600 24 000 26 400 28 800 31 200 33 600 bps synchronous at 1200 2400 4800 7200 9600 12 000 14 400 16 800 19 200 21 600 24 000 26 400 28 800 31 200 33 600 bps ITU V 42bis V 42 Pending ITU Enhanced V 34 approval ITU V 34 AT amp T V 32terbo ITU V 32bis V 32 V 21 V 22bis V 22 V 23 V 25bis Bell 212A and 103 113 ITU V 17 Group 3 T 4 T 30 and EIA TR 29 Class 2 Bell 212A and 103 113 domestic models only V 21 V 23 Int l models only V 42 LAP M or MNP 3 amp 4 error correction V 42bis 4 1 throughput or MNP 5 2 1 throughput data compression Serial port data rates adjustable to 300 1200 2400 4800 9600 19 200 38 400 57 600 and 115 200 bps Xon Xoff Hardware RTS CTS ENQ ACK Unix to Unix Copy Protocol UUCP Spoofing Full duplex over both dial up lines and 2 wire leased lines automatic or manual dialing automatic or manual answer Fully AT command compatible microprocessor controlled remote configuration EIA extended Automode adaptive line probing automatic symbol rate and carrier frequency during start up retrain and ra
51. Multi L z BA Series Intelligent Data Fax Modem Multi lech Systems User Guide 88312001 Revision B MultiModem Models MT2834BA MT2834BAI This publication may not be reproduced in whole or in part without prior expressed written permission from Multi Tech Systems Inc All rights reserved Copyright 1999 2002 by Multi Tech Systems Inc Multi Tech Systems Inc makes no representations or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose Furthermore Multi Tech Systems Inc reserves the right to revise this publication and to make changes from time to time in the content hereof without obligation of Multi Tech Systems Inc to notify any person or organization of such revisions or changes Record of Revisions A 06 01 99 Manual revised Manual reformatted for electronic distribution All pages remain at Revision A B 08 15 02 Replace Trio with PhoneTools change phone numbers add patents revised safety warnings Trademarks of Multi Tech Systems Inc are as follows MultiModem Multi Tech and the Multi Tech logo MNP Microcom Network Protocol is a trademark of Microcom Inc AS 400 and System3x is a trademark of IBM Macintosh is a trademark of Apple Computer Inc Unix is a trademark of X Open Co Ltd Windows is a registered trademarks of Microsoft All other brands and product names mentioned in this pu
52. OR No valid devices detected is displayed verify that the modem is turned on and that all cables are correctly and securely attached Click the modem to be upgraded and then click Next to proceed Select the port to be upgraded from the Port list select the appropriate HEX file from the Hex File list and then click Next to continue Note Do not use FLASHLDR HEX This file is used internally by Flash Wizard The Progress dialog box appears showing a status bar that indicates the progress of the upgrade Caution Any disruption of the program during this stage of the upgrade can cause your modem to become inoperable Wait for the Next button to become active before proceeding When the flash upgrade is complete the message Programming Complete appears Click Next to continue The Results dialog box appears next Click Finish to exit Flash Wizard Step 7 Restore Your Parameters Your modem has been updated You can now open your terminal program to reprogram your modem parameters or to confirm the update by typing ATI in the terminal window and pressing ENTER 81 MultiModemBA User Guide Appendix B Troubleshooting 82 Your modem was thoroughly tested at the factory before it was shipped If you are unable to make a successful connection or if you experience data loss or garbled characters during your connection it is possible that the modem is defective However it is more likely that the source of your problem lies else
53. TS to follow RTS In some applications however it may be necessary for CTS to operate independent of RTS amp HF1 allows CTS to operate independently regardless of the state of RTS and is the factory default If this is the case refer to the amp F command for control of the Clear to Send signal 37 MultiModemBA User Guide 38 DSR CD Interaction Control amp SF In typical applications Data Set Ready DSR follows Carrier Detect CD amp SF0 enables DSR to follow CD and is the factory default amp SF1 enables DSR to operate independent of CD If this is your application refer to the amp S command for control of the Data Set Ready signal 4 4 8 Error Correction Commands You can use AT commands to place your modem one of three V 42 error correction modes of operation These are the Normal Auto Reliable and Reliable modes Normal Mode amp EO In Normal mode of operation the modem s V 42 error correction capabilities are disabled and the modem functions as a non error correcting modem Auto Reliable Mode amp E1 In Auto Reliable mode during the handshaking procedures at the start of the on line connection the modem automatically determines whether or not the modem with which it is communicating is using V 42 error correction If the modem determines that the other modem is using V 42 it switches itself into MNP or LAPM Reliable V 42 mode and its error correction capability is enabled If it is determined that the oth
54. The AT amp T4 command lets the modem respond to a RDL signal and places itself in digital loop The AT amp T5 command causes the modem to ignore the RDL signal The factory default is amp T5 Enable Disable Trelis Coded Modulation T This command enables or disables the Trellis Coded Modulation of the modem There is usually no need to disable turn off Trellis codings except under an unusual line condition called impulse noise AT TO turns Trellis coding off and AT T1 turns Trellis coding on factory default Fallback Modes When On Line F If line conditions deteriorate the modem automatically drops its transmission speed fallback The F command controls the different ways the modem falls back During operation if the error rate becomes too great the modem performs a retrain If after the retrain the error rate is still too high for 33600 bps operation the modem initiates a retrain at 4800 bps If after the first retrain the modem returns on line at 33600 bps the modem then starts a counter and a timer If three retrains occur within a two minute period the modem falls back to 4800 bps Entering AT FO or AT F allows no fallback when on line AT F1 allows the modem to fallback based on the error rate or if three retrains have occurred within a two minute period from 33 6K to 31 2K to 28 8K to 26 4K to 24K to 21 6K to 19 2K to 16 8K to 14 4K to 12K to 9 6K to 4 8K bps The AT F2 command enables incremental fall back
55. acter limit is exceeded or if invalid characters are entered the Command Buffer automatically erases and an ERROR message appears You would then re enter your command within the sixty character maximum using only the allowed characters 4 1 2 Functional Modes The MultiModem can be in one of two functional states see Figure 4 1 These are Command mode and On line mode There is also an in between state Wait for Carrier where the modem is out of Command mode but not yet really On Line When the modem is initially powered up it is in Command mode and is ready to accept commands from your keyboard or software The modem enters On line mode after dialing making a connection with another modem and then detecting a valid carrier signal If no carrier is detected within a certain time frame the modem abandons the call and re enters Command mode Once on line the modem exits On line mode if one of two conditions is met If the carrier is lost or intentionally dropped the modem hangs up and re enters Command mode Also if the modem recognizes the Escape sequence for which it is configured i e either the Escape characters in the serial data stream the Remote Escape characters in the modulated data stream or the Break signal the modem will exit On line mode retain the datacomm link and enter Command mode You can force the modem into On line mode without dialing by sending the ATD or ATA command to the modem 4 2 Chapter 4
56. ally selected Result Codes Multi Tech or Standard AT amp Q The modem gives you a choice between the Multi Tech Result Codes and Result Codes that more closely match the standard AT command set responses AT amp Q1 selects AT responses with no Reliable Compression modifiers With this command the terse result code for CONNECT 2400 is 10 AT amp QO selects Multi Tech responses with Reliable Compression modifiers With this command the terse result code for CONNECT 2400 is 9 Result Codes Verbose Terse V The V command controls whether the modem s result codes are displayed as word verbose or single digit terse messages For example if after dialing no carrier signal is detected the resulting message can be displayed either as NO CARRIER or as the digit 3 Entering ATVO or ATV causes the modem to display the Result Codes as digits while ATV1 displays them as words If you do not select a method the factory default setting causes the modem to display Result Codes as words 33 MultiModemBA User Guide 34 Result Codes Basic and Extended and Call Progress Selection X The X Command is used to select one of two possible dialing methods dumb or smart and to select various response combinations related to these methods You can choose to have certain responses suppressed or whether or not you want speed indications along with the CONNECT responses You can also pick and choose certain responses i
57. an automatically match the speed of the other modem you must specify parameters such as type of flow control break length number of data bits number of stop bits and parity If you set these parameters incorrectly with the remote system gibberish will appear on your screen 19 MultiModemBA User Guide 20 3 5 2 Terminal Emulation If you are accessing the remote computer as if from an on site terminal the keyboard codes used by your computer may not match the ones used by the remote computer To be compatible with the remote computer your software must be able to substitute the appropriate codes in what is known as terminal emulation Most communications programs can emulate the most common mainframe terminals including the DEC VT100 VT102 and VT52 terminals and the basic TTY mode If in doubt about which to choose for a BBS try ANSI or VT100 first 3 5 3 File Transfer Protocols When you upload or download files with your modem the host computer will ask which file transfer protocol you want to use Most communications programs allow you to choose a default protocol Your software s documentation should list the ones it can use not all communications programs support all protocols Zmodem is the recommended protocol for most transfers Multi L z Chapter 4 Command Mode Multi c 9 ystems MultiModemBA User Guide 4 1 22 Introduction AT commands are the means by which you and your communications software
58. and data compression options These additional commands are listed below Remember to precede each command with the AT characters Normal Auto Reliable Reliable Mode Commands amp EO Normal Mode amp E1 Auto Reliable Mode amp E2 Reliable Mode Modem Initiated Flow Control Commands amp E3 Disables flow control no flow control amp E4 Hardware flow control CTS on off and RTS on off amp E5 Xon Xoff flow control Xon Xoff Pass Through Commands amp E6 Modem responds to Xon Xoff characters but does not allow Xon Xoff characters to pass through to remote site amp E7 Modem responds to Xon Xoff characters and allows them to pass through to remote site X0 Selects single Xoff character until Xon level returns X1 Selects multiple Xoff characters after buffer levels is full Enq Ack Pacing Commands amp E8 Eng Ack method of pacing off amp E9 Eng Ack method of pacing on Normal Mode Modem Flow Control Commands amp E10 Normal Mode Modem Flow Control off amp E11 Normal Mode Modem Flow Control Xon Xoff on Computer or Terminal Initiated Flow Control Pacing Commands amp E12 Pacing off amp E13 Pacing on either RTS on off or Xon Xoff depending on the setting of amp E4 or amp E5 Data Compression Commands amp E14 Data Compression disabled amp E15 Data Compression enabled Factory Default setting 43 MultiModemBA User Guide 44 4 4 11 Speed Conversion C
59. answer operations DIC stops the modem from answering incoming calls CIC causes the modem to answer incoming calls 95 MultiModemBA User Guide Appendix D V 25bis Operation 96 Chapter 4 described a set of commands which let the modem dial hang up and be configured for various applications However these commands the AT command set are only functional when the DTE transmits data asynchronously That is they cannot be used with synchronous equipment such as that found in IBM s Binary Synchronous Communications BSC and Synchronous Data Link Control SDLC environments The ITU V 25bis commands provide you with an alternate set of commands and responses to those described in Chapter 5 for applications in which the DTE is synchronous V 25bis commands support dialing functions in asynchronous or synchronous mode according to the recommendations of the ITU however the AT commands are understood to reign in the asynchronous world while the V 25bis commands are relegated to the synchronous world of datacomm If you need to establish a datacomm link over Public Switched Telephone Network PSTN dial up services and your equipment outputs a synchronous data stream V 25bis commands are essential V 25bis mode AT commands do not include any modem configuration commands You can execute normal AT commands in V 25bis mode for modem configuration Delayed and Forbidden Numbers V 25bis provides the facility to delay failed call retr
60. anty a check or purchase order for repair charges For out of warranty repair charges go to www multitech com documents warranties Extended two year overnight replacement service agreements are available for selected products Please call MTS at 888 288 5470 extension 5308 or visit our web site at http www multitech com programs orc for details on rates and coverage s 75 MultiModemBA User Guide Please direct your questions regarding technical matters product configuration verification that the product is defective etc to our Technical Support department at 800 972 2439 or email tsupport Q multitech com Please direct your questions regarding repair expediting receiving ship ping billing etc to our Repair Accounting department at 800 328 9717 or 763 717 5631 or email mtsrepair Q multitech com Repairs for damages caused by lightning storms water power surges incorrect installation physical abuse or user caused damages are billed on a time plus materials basis Repair Procedures for International Customers Outside U S A and Canada Your original point of purchase Reseller may offer the quickest and most economical repair option for your Multi Tech product You may also contact any Multi Tech sales office for information about the nearest distributor or other repair service for your Multi Tech product http www multitech com COMPANY offices DEFAULT ASP In the event that factory service is requi
61. are able to communicate with and configure your modem They enable you to establish read and modify parameters in addition to dialing The following provides both a summary and a detailed explanation of the AT commands recognized by the MultiModem 4 1 1 AT Command Editing The BACKSPACE key on your keyboard can be used to edit characters in the AT command line An AT command is not executed until the RETURN key is pressed The BACKSPACE key erases the previous character for reentering The BACKSPACE key does not erase the AT characters once they are entered If your keyboard has no BACKSPACE key CTRL H does the same thing The character recognized by the modem as BACKSPACE may be changed to any other ASCII character with S Register S5 If you wish to cancel an entire command that has been entered but not yet executed enter CTRL X This also clears the command buffer The effect is the same as backspacing to cancel the entire command only quicker Characters entered in a command are stored in the modem s Command Buffer memory until executed by hitting RETURN The Command Buffer s capacity is sixty characters The Attention Characters AT do not count in the sixty allowed Command characters Spaces which may be used for increased display readability may be used when entering a command but are not stored in the Command Buffer and are not counted in the sixty allowed characters Hyphens parentheses etc are not allowed If the sixty char
62. ased Line Dial Up In Synchronous mode DIP Switch 6 controls the option of having timing controlled by the receive clock The originate modem in effect adjusts to the answer remote modem Place DIP Switch 6 in the DOWN position to enable Slave Clocking Place DIP Switch 6 in the UP position to disable Slave Clocking Slave Clocking Enabled Switch 6 DOWN Slave Clocking Disabled Switch 6 UP Factory Default Setting UP Switch 7 Request To Send Forced RTS Asynchronous Synchronous Mode Leased Line Dial Up If your computer or terminal uses RTS CTS protocol typically used in some synchronous applications but also if using hardware pacing for V 42 error correction or speed conversion you may want to set RTS to function independently of CTS DIP Switch 7 UP For most applications especially asynchronous this switch should be set so that RTS is forced On DIP Switch 7 DOWN RTS functions Normally Switch 7 UP RTS forced On Switch 7 DOWN Factory Default Setting DOWN Switch 8 Enable Disable Command Mode Com Asynchronous Synchronous Mode Leased Dial Up In some applications you may want to disable the modem s Command mode so that the modem does not recognize or react to AT or V 25bis commands This may be true in strictly auto answer applications where no call origination is required Place DIP Switch 8 in the DOWN position to enable Command mode Place DIP Switch 8 in the UP position to disable Command
63. assword Attempts S26 S26 counts the number of times there has been a failed password attempt For example if you entered ATS26 the message 003 would be displayed meaning someone has failed three times to gain access to your modem using its password security system Units 1 failed attempt Range 0 255 Default 0 63 MultiModemBA User Guide Local Inactivity Timer S29 S29 defines the amount of idle time that can elapse between AT commands after the SETUP password has been entered If this timer expires the LOGIN and SETUP passwords will have to be re entered S29 only takes effect when the modem has been sent a ZDB1 command which secures the modem from local and remote configuration or dialing i e no AT commands can be sent until the LOGIN and SETUP passwords have been entered Units Minutes Range 1 255 Default 20 64 Multi L z Chapter 7 DIP Switch Settings Multi lech Systems MultiModemBA User Guide 7 1 7 2 66 Introduction There are several DIP Switch options on the modem s printed circuit PC board The DIP Switches are accessible through a cut out on the side of the modem This chapter explains the modem s printed circuit board options Sixteen DIP Switch settings and the modem s speaker volume control are explained in detail including all default settings lt Power Switch Power Jack LED Indicators RS 232 V 24 lt Connector Line Jack Phon
64. at your particular modem is a MT2834BA 28 800 bps fax Class 2 capable modem With autodetect support in your MT2834BA your PC can automatically allocate resources and configure it and other devices The MT2834BA implements autodetect capability in the form of a single NF Information file that specifies AT Command mode and Result Code Registry Keys that are specific to your MT2834BA Listing Current Operating Parameters L5 L7 The L5 and L7 commands list the current operating parameters of your modem This information can be very useful when you are changing communications software or when you are changing modem default settings The command to list the modem s current operating parameters is ATL5 for the basic parameters Entering ATL7 lists additional parameters on the modem Listing S Register Values L6 Entering ATL6 lists the current values stored in the modem s S Register This information can be very useful if you wish to change S Register values Listing On Line Diagnostics L8 The L8 command displays the current on line CONNECT status of the modem This display can be printed and used as a modem status report or as diagnostic information such as when calling Tech Support To activate this command first type AT lt CR gt on line escape command while maintaining command mode then type ATL8 What then displays on your monitor is your modem s current on line condition e g Link Type Line Speed Serial Speed Type of Error C
65. ata Dialing With Voice Data Dialing the modem automatically dials the phone number stored in the N1 position of memory whenever the Voice Data switch is toggled You must first enter AT VD1 amp W0 lt CR gt This command string enables Voice Data dialing when the Voice Data toggle switch is activated To disable Voice Data Dialing default enter the command AT VD0 W0 lt CR gt 4 4 2 Dial Modifier Commands There are several command characters that can be included within a dialing command following the letter D called Dial Modifiers They have various functions including the selection of Pulse or Tone Dialing pauses in the dial sequence automatic re dials if a number is busy and reverting to the Command mode or switching to the Answer mode after dialing Pulse or Tone Dial P T The modem dials numbers using either pulse or tone dialing or a combination of both methods Pulse dialing is a method used by rotary dial telephones which involves the timed opening and closing of line relay Tone dialing is the method used by push button touch tone telephones and is sometimes referred to as DTMF or Dual Tone Multi Frequency dialing The method used is selected by including a P for Pulse or a T for Tone in the dialing command right before the digits you wish to have dialed in that manner For example you would pulse dial the number 555 1212 by entering ATDP5551212 and hitting RETURN You could tone dial the same number by entering AT
66. ata with Originate or Answer Power On Off and DIP Switches for various modem options Speaker for call progress monitoring 0 to 50 C 32 to 120 F 115 Volts AC 60Hz 0 3amp 2 prong outlet mounted transformer 240V 50Hz optional International 6 150 x 9 00 x 1 375 15 6 cm x 22 9 cm x 3 5 cm 1 6 pounds 0 72 Kg without transformer 2 6 pounds 1 18Kg with transformer Five Years Power is supplied through an AC power transformer terminated with a standard two prong plug The transformer supplies low voltage AC to the modem and plugs into any conventional 115 volt AC 60 Hz two prong power outlet 240 volts AC 50Hz 3 Amp for International modems The power transformer supplied with the modem is the only one that should be used Use of any other transformer could cause damage to the modem A Power On Off switch is located on the back of the modem 1 7 Chapter 1 Introduction and Description Modem LED Indicators The MultiModem diagnostic LED indicators are shown in Figures 1 1 Multi ect Multi 2C CXE 6363 C2 C222 C2 CO Send Rev Carr 28 8K 24 0K 19 2K 14 4K 9600 OffHk Rdy V 42 Fax Figure 1 1 MT2834 LED Display SD Send Transmit Data This LED blinks when data is being transmitted on for a space off for a mark The state of this LED matches the TD circuit on Pin 2 of the RS 232C V 24 interface RD Receive Data This LED blinks when data is being received on for a space of
67. ault Description 24 10 mSec 0 2 5 sec 250 S17 defines the break time space sent to the local PC The default is set for a 25 to 250 mSec break The break time can be changed in 10 mSec increments by increasing or decreasing the value of S17 PBX CBX Disconnect Drop Time for DSR CTS CD Unit Range Default Description 25 50 mSec 0 255 20 Some PBX and CBX phone systems require the modem s DSR CTS and or CD signal s to behave in a certain manner when calls are disconnected The modem s amp R amp S and amp C commands cause the modem to drop these signal s for a specified time period upon disconnect and then bring the signal s up again S24 defines the length of time that the signals drop The default setting of 20 results in a one second drop time which is what most PBX CBX systems with this requirement need DTR Dropout Time Unit Range Default Description 100 mSec 0 1 through 255 0 S25 defines the amount of time that DTR must be dropped before the modem disconnects Typically a disconnect occurs when DTR is dropped for 50 milliseconds or more This dropout time can be increased up to a maximum of 25 5 seconds The S25 unit value for zero is the default value of 50 mSec For values from 1 through 255 the unit value is 100 mSec 53 MultiModemBA User Guide 54 S26 Failed Password Attempts Unit 1 failed attempt Range 0 255 Default 0 Description S26 counts the num
68. basis Repair Procedures for International Distributors 8 3 76 Procedures for International Distributors of Multi Tech products are on the distributor web site http www multitech com PARTNERS login Copyright Multi Tech Systems Inc 2001 10 Sep 01 Online Warranty Registration If you have access to the World Wide Web you can register your Multi Tech product online at http www multitech com register 8 4 8 5 8 6 Chapter 8 Warranty Service and Technical Support Replacement Parts SupplyNet Inc can supply you with replacement power supplies cables and connectors for selected Multi Tech products You can place an order with SupplyNet via mail phone fax or the Internet at the following addresses Mail SupplyNet Inc 614 Corporate Way Valley Cottage NY 10989 Phone 800 826 0279 Fax 914267 2420 Email info thesupplynet com Internet http www thesupplynet com Technical Support Multi Tech Systems has an excellent staff of technical support personnel available to help you get the most out of your Multi Tech product If you have any questions about the operation of this unit please call 800 972 2439 USA and Canada or 763 785 3500 international and local Please have modem information available You can also contact Technical Support by e mail at the following addresses Country Email Telephone France support multitech fr 33 1 64 61 09 81 India support multitechindia com 91 1
69. ber of times there has been a failed password attempt For example if you entered ATS26 the message 003 would be displayed meaning someone has failed three times to gain access to your modem using its password security system S29 Local Inactivity Timer Unit minutes Range 1 255 Default 20 Description S29 defines the amount of idle time that can elapse between AT commands after the SETUP password has been entered If this timer expires the LOGIN and SETUP passwords will have to be re entered S29 only takes effect when the modem has been sent a ZDB1 command which secures the modem from local and remote configuration or dialing i e no AT commands can be sent until the LOGIN and SETUP passwords have been entered S30 Inactivity Timer Unit 1 min Range 0 255 Default 0 Description S30 causes the modem to disconnect if no data is transmitted or received for a specified time This timer runs during both Reliable and Normal error correction connections The timer restarts any time a data character is passed through the serial port either sent or received If noise on the phone line causes an error to be received during Normal mode this also restarts the timer The default value is off 0 The inactivity timer is disabled by setting S30 to 0 which is the factory default setting S32 Time Elapse for Escape Sequence Unit 1 second Range 0 255 Default 20 Description S32 sets the time period to validate the escape se
70. blication are trademarks or registered trademarks of their respective companies Multi Tech Systems Inc 2205 Woodale Drive Mounds View Minnesota 55112 U S A 763 785 3500 or 800 328 9717 U S Fax 763 785 9874 Technical Support 800 972 2439 Internet Address http www multitech com Contents Chapter 1 Introduction and Description essere 5 1 1 INTTOGUGHON cri aaacasa 6 1 2 How TOUS ADSL 6 1 3 ModemiFealUfes ricalca 7 Loud 2834 Sehes Peattes ariana aloe ni 8 1 4 Fax Feat rana iii 8 1 5 Technical SPEC IGANOINS ce P ERA 9 1 6 xy 10 1 7 ModemiLED INGIGAtorS narra 11 1 8 Controls on PGBoatd aaa alia 12 Chapter 2 Installation and Connection rrrriiiiiii iii 13 2 1 What isin Your M dem Package 2 rait eee ete oi 14 ae L a y EAE A bella ara 14 221 Safety WarhigS s e toic EE aE Peste a a a M ES o ILE Paste a a 15 2 2 2 JdnstellatomPrGeedUle esee eris euet mutet eoe redeat na 15 2 3 Installing Data Communications SOfTWAFe 22i ocio dea naai a E EUR ERE Rd rte das 16 Chapter 3 Software Configuration and Modem Basics 17 3 1 IMO CUCTION pes T 18 32 Gonftg ring Your SO TWAEG o iste oO ee 18 39 2 4 Configuringsottware for Your MOGQGTI sciita ala etes Les bei o tpe iaia 18 3 4 PG Initialization Stings aci lora aaa 18 941 Changing Default Paramete
71. ch 7 must be placed in the UP position This establishes an RTS CTS condition state typical for an IBM5853 modem in half duplex mode Next place DIP Switch 4 in the DOWN position This spoofs the modem into operating like an IBM5853 modem in AS 400 applications DIP Switch 4 in the UP position disables this function Note that the modem must be in Command mode to allow AS 400 mode DIP Switch 8 DOWN and in Synchronous mode DIP Switch 12 UP AS 400 Mode Enabled Switch 4 DOWN AS 400 Mode Disabled Switch 4 UP Factory Default Setting UP 67 MultiModemBA User Guide 68 Switch 4 Unix UUCP Spoofing Asynchronous Mode Leased Line Dial Up The modem can be configured for use with Unix equipment which employs ACK flow control to monitor data integrity The modem can do UUCP spoofing where the modem is able to generate ACKs at the DTE interface Data then is transmitted more time efficiently because the delay of waiting for data to be received then waiting for the ACK to be returned at the remote end is eliminated Placing DIP Switch 4 in the DOWN position enables UUCP spoofing UUCP Spoofing Enabled Switch 4 DOWN UUCP Spoofing Disabled Switch 4 UP Factory Default Setting UP Switch 5 Enable Disable Auto Answer Ans Asynchronous Mode Synchronous Mode Dial Up In some originate only applications you may wish to disable the modem s automatic answering capabilities This may be true if you have a telephone
72. cter Setting an S2 value greater than 127 results in no escape character and therefore no means of entering Command mode from On line mode without breaking the on line connection S3 Return Character Unit ASCII Character Range 0 127 Default 13 M Description S3 defines the character recognized as Carriage Return RETURN or Enter S3 may be set for any ASCII character Chapter 5 S Registers S4 Line Feed Character Unit ASCII Character Range 0 127 Default 10 J Description S4 defines the character recognized as Line Feed S3 may be set for any ASCII character S5 Backspace Character Unit ASCII Character Range 0 127 Default 8 H Description S5 defines the character recognized as BACKSPACE S5 may be set for any ASCII character S6 Wait Time for Dial Tone Unit 1 second Range 2 255 4 255 Default 2 4 Description S6 sets the time the modem waits after the RETURN key is pressed before executing a dial command The default setting is two seconds Decimal 2 S7 Time for Carrier Abort Timer Unit 1 second Range 1 255 1 45 Default 45 Description S7 defines the Abort Timer lack of carrier delay time The default value is 45 seconds Decimal 45 This means that after dialing the modem waits for a carrier signal for up to 45 seconds and if none is detected aborts the call The maximum S7 value is 255 S8 Pause Time for Comma Unit 1 second Range 0 255 4 255
73. cts 9600 bps at serial port SB19200 selects 19 200 bps at serial port SB38400 selects 38 400 bps at serial port SB57600 selects 57600 bps at serial port SB115200 selects 115200 bps at serial port amp SFO selects DSR follows CD amp SF1 selects DSR independent amp SO forces Data Set Ready On amp S1 lets Data Set Ready act normally amp S2 Data Set Ready drop is regulated by S24 on disconnect SPO disables UUCP Spoofing SP1 enables UUCP Spoofing Modem will tone dial numbers following the T amp T4 means Enable Response to Request for Remote Digital Loopback amp T5 means Disable Response to Request for Remote Digital Loopback amp TO turns off Trellis Coded Modulation amp T1 turns on Trellis Coded Modulation UO places modem in Analog Loop Originate Mode U1 places modem in Analog Loop Answer Mode U2 places modem in Remote Digital Loopback test mode U3 places modem in Local Digital Loopback test mode VDO disables Voice Data Dialing VD1 enables Voice Data Dialing VO means Result Codes sent as digits terse response V1 means Result Codes sent as words verbose response Wait for new dial tone amp WO causes modem to store its current parameters in non volatile RAM and modem will load these for future sessions instead of reading factory ROM defaults unless amp F command used amp W1 causes modem to not store parameters 91 MultiModemBA User Guide Xn n 0 1 2 3 or 4 Xn n O o
74. d on Synchronous Operation Switch 12 UP Asynchronous Operation Switch 12 DOWN Factory Default Setting DOWN 7 3 Chapter 7 DIP Switch Settings Switches 13 and 14 Speed Switches Synchronous Mode Leased Line DIP Switches 13 and 14 are used to set the modem s data transmission rate Switches 13 and 14 are used in combination typically in leased line and call origination applications Note The modem baud rate command MBn overrides the setting of these speed selection switches DIP switches 13 and 14 28800 bps Operation Switch 13 UP and Switch 14 UP 19200 bps Operation Switch 13 DN and Switch 14 UP 14400 bps Operation Switch 13 UP and Switch 14 DN 9600 bps Operation Switch 13 DN and Switch 14 DN Factory Default Setting Switch 13 UP and Switch 14 UP Switch 15 Carrier Detect DSR Forcing DSR Asynchronous Synchronous Mode Dial Up Leased Line Some terminals react in unusual ways to the toggling of the Carrier Detect CD RS 232C V 24 pin 6 signals The most common symptom is that the modem does not respond to commands or does not echo characters In these cases it is advisable to force these two signals On in order for the terminal to communicate properly with the modem in Command mode This is done by setting DIP Switch 15 DOWN With DIP Switch 15 in the UP position both CD and DSR will be either on or off depending on the On Line status CD and DSR normal Switch 15 UP CD
75. e Dial Up Synchronous Data Link Control SDLC and Binary Synchronous Control BSC are two error correction protocols used in the IBM Mainframe environment Place DIP Switch 2 in the UP position to enable SDLC mode and place DIP Switch 2 in the DOWN position to enable BSC mode SDLC Mode Switch 2 UP BSC Mode Switch 2 DOWN Factory Default Setting UP Switch 3 Enable Suppress Responses Q Asynchronous Mode Dial Up In some Asynchronous mode applications you may want to suppress all responses from the modem Place DIP Switch 3 in the DOWN position to enable Result Code responses Q0 Place DIP Switch 3 in the UP position and answer mode is handled without responses and echo turned off Q2 but originate is still intelligent Enable Responses Originate Answer QO Switch 3 DOWN Suppress Responses Answer Q2 Switch 3 UP Factory Default Setting DOWN Switch 3 dB Transmission Levels Asynchronous Synchronous Mode Leased Line DIP Switch 3 adjusts dB transmission levels required by some phone carriers Place DIP Switch 3 in the DOWN position to enable 9 dB transmission Place DIP Switch 3 in the UP position to enable 15 dB transmission 9dB Transmission Switch 3 DOWN 15dB Transmission Switch 43 UP Factory Default Setting DOWN Switch 4 AS 400 Mode Synchronous Mode Leased Line Dial UP The modem can function in the IBM AS 400 environment appearing like an IBM5853 modem First DIP Swit
76. e Jack 16 position DIP switch Figure 7 1 PC Board DIP Switch Option Settings Switch 1 Forced DTR DTR Asynchronous Synchronous Mode Leased Line Dial Up The modem must have a high DTR signal in order to operate DTR is provided to the modem by the terminal or computer to which it is attached through pin 20 of the RS 232C V 24 interface If your terminal or computer is not providing DTR to the modem you can force the DTR signal high with DIP Switch 1 DTR function normally Switch 1 UP DTR forced On Switch 1 DOWN Factory Default Setting UP Switch 2 Flow Control amp E4 amp E5 Asynchronous Mode Leased Line Dial Up With Hardware Flow Control the modem uses its RS 232C V 24 interface to control the flow of data from the computer or terminal to which it is attached The CTS signal on Pin 5 of the RS 232C V 24 is brought low to stop the flow of data and is brought high to restart it Place DIP Switch 2 in the UP position to enable Hardware Flow Control amp E4 Xon Xoff Flow Control amp E5 is another flow control method Xon Xoff characters in the data dictate the start and stop of data flow from the computer or terminal Place DIP Switch 2 in the DOWN position to select Xon Xoff Flow Control Hardware Flow Control amp E4 Switch 2 UP Xon Xoff Flow Control amp E5 Switch 2 DOWN Factory Default Setting z UP Chapter 7 DIP Switch Settings Switch 2 SDLC BSC Option Synchronous Mode Leased Lin
77. e computer while Pacing is something the computer does to the modem Modem Initiated Flow Control RS 232 V 24 Computer Modem Or Data Flow Terminal Computer Initiated Flow Control Pacing RS 232 V 24 Computer Modem Or Data Flow Terminal Figure 4 1 Flow Control and Pacing 40 Chapter 4 Command Mode Hardware Flow Control amp E4 With Hardware Flow Control the modem uses its RS 232C interface to control the flow of data from the computer or terminal to which it is attached The CTS Clear to Send signal on Pin 5 of the RS 232C interface is brought low to stop the flow of data and is brought high to restart it When you select Hardware Flow Control as your Modem Initiated Flow Control method you will also be selecting it for Pacing The difference between the two however is that Modem Initiated Flow Control uses the Pin 5 CTS output signal while Pacing uses the Pin 4 RTS input signal Modem commands are used to select the method of flow control used by the modem when its error correction capabilities are used If neither method is selected the modem defaults to no flow control amp E3 Xon Xoff Flow Control amp E5 Xon Xoff is the most commonly used method of flow control Under this method control characters known as Xon and Xoff are inserted by the modem into the data to start and stop the flow of data from the computer or terminal to which the modem is attached Xoff which is a Control S stops the flow of data
78. e letter S followed by the S Register number and a question mark then hit RETURN To verify that the S Register value was entered correctly enter for example ATS8 and hit RETURN You should receive a response of the assigned value given to that S Register SO Number of Rings Until Modem Answers Unit 1 ring Range 0 255 Default 1 Description SO defines the number of rings the modem waits before answering an incoming call The default value is one ring Decimal 1 which means that the modem answers the call immediately after the first ring The maximum number of rings that can be configured is 255 Setting the value to zero 0 disables auto answer completely S1 Rings Which Have Occurred Unit 1 ring Range 0 255 Default 0 Description S1 counts the number of rings that have occurred It is a read type of register and is seldom if ever used in typical operation Each time an incoming ring signal is detected S1 increases its value by one up to a maximum of 255 If you set S1 to a value other than its default value of zero or if the value is increasing with rings this new value remains stored in S1 for eight seconds after the last ring is counted after which time the value reverts to zero S2 Escape Code Character Unit ASCII Character Range 0 127 Default 43 7 Description S2 defines the escape code character The default character is the plus 7 sign Decimal 43 but may be set for any ASCII chara
79. e modem from answering the call by entering the DIC Disregard Incoming Calls command CIC Connect to Incoming Calls command will cause your modem to answer the call either reversing the effect of a DIC command or simply have your modem answer the call immediately without waiting the regulation time before answering 99 MultiModemBA User Guide 100 DTR Dialing D Command DTR Dialing is an alternate method of causing the modem to automatically dial a number Data Terminal Ready DTR is a signal that comes into the modem from the terminal or computer to which itis connected via pin 20 of the RS 232 interface In DTR Dialing the modem will automatically dial a stored number as soon as it receives a high DTR signal The DTR Dialing method is popular when using the modem in synchronous applications To enable DTR Dialing enter command AT D1 and hit Return The modem will now dial the phone number you have stored as NO when it receives a high DTR signal DTR must remain high for the duration of the call until disconnect To disable DTR Dialing enter the command AT DO or AT D and hit RETURN When you use DTR Dialing be sure that DIP Switch 1 is in the UP position so that DTR is not forced on In addition when using DTR Dialing in a synchronous application be sure that DIP Switch 8 is in the UP position to disable V 25bis Command mode ITU V 25bis Country Specific Information Due to the flexibility of the V 25bis standard each
80. e next number failing bumps off the oldest number on the list onto the Forbidden Number list Numbers on the Delayed Number list that succeed in a connect attempt are removed If a certain number of failed attempts occur the number of failed attempts is specified by each country the number is entered into the V 25bis Forbidden Phone Number List Forbidden phone numbers cannot be dialed at all To list the phone numbers on the V 25bis Delayed Phone Number List enter RLD and hit RETURN Listing Forbidden Phone Number RLF Command Those phone numbers that have failed to connect the required number of times as specified by country regulations are removed from the Delayed Number list and entered onto the V 25bis Forbidden Number list Numbers on the Forbidden Number list cannot be dialed at all for some maximum amount of time which is also specified by country regulations In some countries the time might be one hour and in others the number may never be dialed again The forbidden list is eight numbers long with the newest number replacing the oldest if the memory is full To list the numbers in the Forbidden list enter RLF and hit RETURN Disregard or Connect to Incoming Calls DIC or CIC Command The Disregard or Connect to Incoming Calls commands are used for Auto Answer operations Depending on the country regulations your modem will wait some amount of time or number of rings before answering the call During that time you can stop th
81. ed to that of the computer and will adjust its speed to any changes in the computer s speed in Originate mode or to the speed of the originating modem in Answer mode The speed at which the modem communicates over the phone line will always be the same as the speed at which it communicates via its RS 232C serial port Modem Baud Rate MB The MB command presets the modem s transmission baud rate for originate operations i e the speed of the modem s transmissions over the telephone lines when originating a call With speed conversion this transmission speed can be a different baud rate than the serial port speed When the modem receives answers a call from another modem it automatically switches its phone line transmission speed to match the calling modem However if the modem originates a call to another modem that is unable to connect at the same baud rate it automatically drops to a lower baud rate in an attempt to match the speed of that modem For example if the modem is set for 14 400 baud and calls another modem that has a top speed of 2400 baud it drops to 2400 baud The command to set the Modem Baud Rate is AT MBn where n can be AT MB75 CCITT V 23 AT MB300 300 bps AT MB1200 1200 bps AT MB2400 2400 bps AT MB4800 4800 bps AT MB9600 9600 bps AT MB14400 14400 bps AT MB19200 19200 bps AT MB28800 28800 bps AT MB33600 33600 bps The factory default is 33600 bps Chapter 4 Command Mode Serial Port
82. energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e Reorient or relocate the receiving antenna e Increase the separation between the equipment and receiver e Plug the equipment into an outlet on a circuit different from that to which the receiver is connected e Consult the dealer or an experienced radio TV technician for help This device complies with Part 15 of the FCC rules Operation of this device is subject to the following conditions 1 This device may not cause harmful interference and 2 this device must accept any interference that may cause undesired operation WARNING Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment Industry Canada This Class B digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Cet appareil num rique de la classe B respecte toutes les exigences du Reglement Canadien sur le mat riel brouilleur FCC Part 68 Telecom 1 This equip
83. entering your Set up Password After entering it you can then execute AT commands as if you were connected locally If you set S Register S13 to zero Remote Configuration is disabled 6 3 1 Initial Setup Procedures for Callback and Remote Configuration Your modem was shipped with a default LOGIN Password and Setup Password LOGIN MULTI TECH and Set up MODEMSETUP so that you have access to the features used for configuring the modem Because the defaults are in the modem owner s manual and anyone can find out what they are you should change the codes as the first step of your initialization procedure Chapter 6 Callback Security and Remote Configuration Table 6 1 Modem LOGIN Setup and Remote Escape Code Procedures To change your modem s LOGIN Password and Setup Password Step Procedure Note Passwords are upper lower case sensitive The case you enter here is the case that must be used at Log In 1 Type AT IMULTI TECH and hit RETURN Your modem will respond with OK if the LOGIN Password is wrong the modem s response is ERROR 2 Type ATZSMODEMSETUP and hit RETURN Your modem will respond with the following OK or ERROR if wrong Setup Password Note At this point you can change the LOGIN Password and Setup Password 3 Type ATZlIzxxxxxxxxxx with any keyboard characters used minimum 6 maximum 10 and hit RETURN Your modem responds with OK 4 Type ATZSzyyyyyyyyyy with keyboard characters used minimum 6 maximum 10 and
84. er entry to forbidden list 4 Delayed and Forbidden Numbers lists are checked when dialing in AT command mode If dialing is not possible then No Carrier is the response Auto Answer behavior 1 Auto Answer in 5 seconds if no DIC Command indication modifications 1 Dialing digit means wait for dialtone acts the same as in dialing string Delay and Forbidden list behavior 5 retries without delay 2 minute delay between next 4 retries After 9 retries the number is put on the forbidden list 120 minute timer is started on entry to delay list When it runs out the number is removed from whichever list it is on oc RON 101 MultiModemBA User Guide Appendix E MultiModemBA Cables These cables connect your modem to your terminal or computer s serial port 25 PIN DTE 25 PIN DCE Connector Device Figure E 1 RS232 Cable IBM PC RED Tip TEN GREEN Ring To Terminal RJ 11 Type Block Screws Modular Plug Transmit and Receive Figure E 2 Two Wire Leased Line Connection 102 Appendix F Regulatory Information Appendix F Regulatory Information FCC Part 15 This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency
85. er modem is not using V 42 the modem remains in Normal mode without error correction The default setting is Auto Reliable mode amp E7 The method the modem uses to determine if the modem it calls is a V 42 modem involves the use of a Link Request When the modem is in Auto Reliable mode and originates a call it goes through normal handshaking procedures just like any dial up modem After establishing the on line connection the modem transmits a Link Request message to the answering modem The Link Request message is generally about 33 coded characters If the answering modem replies with an appropriate V 42 acknowledgment response the modem switches into Reliable mode Otherwise it stays in Normal mode This V 42 Link Request handshaking procedure generally takes about five seconds When operating in V 42 Reliable mode the modem uses its memory or buffer to store data as it is received During periods of error caused retransmissions or compression slowdowns this buffer may fill up To prevent buffer overflow and subsequent loss of data the modem uses flow control to signal the computer attached to its RS 232C port that the modem buffer is close to being full This causes the computer to pause in its data transmission until the modem is able to empty its buffer sufficiently to accept more data at which time the modem signals the computer that it may resume transmission Reliable Mode amp E2 In Reliable mode the modem uses its V
86. ession Enabled Speed Conversion On Speed Conversion Off Set modem speed e g MB14400 Set serial port speed e g 8B57600 Help Product Code Inquiry Windows 95 Autodetect Inquiry 2834 Series only List Current Operating Parameters List S Register Values List additional Configuration Parameters List On Line Diagnostics Off Hook Escape Sequence Entering Command Mode while On Line Escape Sequence Options Entering Command Mode while On Line Force Answer Mode Exit Command Mode Go Back On Line Format Line Probe Display Graph or Table Format Enable Disable Reading Line Probe From DSP during handshake Display of Signal Strength Information Display Signal to Noise Ratio SNR 2834 Series only L11 Display of Noise Information COMPRESSION amp E15 CONFIGURE SPEED BA0 CONVERSION BA1 MB SB EXECUTE H IMMEDIATE I ACTION 19 COMMANDS L5 L6 L7 L8 H AT lt CR gt E A O EXECUTE DF LINE DP PROBE L9 COMMANDS L10 amp RP READ AND Sr ASSIGN Sr S REGISTER VALUES REMOTE CBN CONFIGURATION DB amp CALLBACK Al SECURITY RCBNxx S TEST MODEM U amp T Initiates Retrain to Read Line Probe Parameters Read Current S Register Value Assign S Register Value Passwords for Callback Phone Numbers Callback Security Enable Disable Change LOGIN Password Erase Password Linked with Memory Location xx Change SETUP Password Self Test Modem Chapter 8 Enable Disable Digital Loopback Signal 25 Mul
87. esult codes With LAP M error correction on LAP M or L is added to these result codes With data compression on COMPRESSED or C is added Note these Extended Result Codes are displayed when your modem is set up to do so with an X1 X2 X3 or X4 command Standard AT Result Codes TERSE VERBOSE TERSE VERBOSE 0 OK 11 CONNECT 4800 1 CONNECT 12 CONNECT 9600 2 RING 18 CONNECT 14400 3 NO CARRIER 19 CONNECT 19200 4 ERROR 21 CONNECT 21600 5 CONNECT 1200 24 CONNECT 24000 6 NO DIALTONE 26 CONNECT 26400 7 BUSY 28 CONNECT 28800 8 NO ANSWER 31 CONNECT 31200 10 CONNECT 2400 33 CONNECT 33600 Reliable Compression modifiers are not displayed with Standard AT Result Codes 4 4 Chapter 4 Command Mode Dialing Commands 4 4 1 Dialing Action Commands Dial Command D The letter D in a command causes the modem to dial the telephone number immediately following it For example if you enter ATD5551212 and hit RETURN the modem dials the number 555 1212 The D command is also used in conjunction with a telephone set for manual dialing You dial the number on your telephone set and after hearing the answer tone on your handset you type ATD on your keyboard and hit RETURN Then hang up the headset Unless you have a specific need to dial in this manner we recommend you use the first method where the telephone number is entered on your keyboard The modem gives you several choices of dialing methods You can use tone or pulse dialing by
88. f for a mark The state of this LED matches that of the RD circuit on Pin 3 of the RS 232C V 24 interface CD Carrier Detect This LED is lit when a valid carrier tone has been detected When the modem is connected at 33 600 bps the 28 8 LED rapidly blinks at approximately 5 blinks per second When the modem is connected at 31 200 bps the 28 8 LED blinks slowly at approximately 1 blink per second 28 8 28 800 bps This LED is lit when the modem is connected at 28 800 bps Note if the modem falls back to 26 4K bps while in V 34 mode both the 28 8 and 24 0 LEDs light 24 0 24 000 bps This LED is lit when the modem is connected at 24 000 bps Note if the modem falls back to 21 6K bps while in V 34 mode both the 24 0 and 19 2 LEDs light 19 2 19 200 bps This LED is lit when the modem is connected at 19 200 bps 14 4 14 400 bps 2834 and 1432 models only This LED is lit when the modem is connected at 14 400 bps Note if the modem falls back to 12 000 bps while in V 32bis mode both the 14 4 and 96 LEDs light 96 9600 bps This LED is lit when the modem is connected at 9600 bps 24 2400 bps This LED is lit when the modem is connected at 2400 bps OH Off Hook This LED is lit when the phone line is off hook This occurs when the modem is dialing on line or answering a call This LED also flashes when the modem is pulse dialing in Command mode TR Terminal Ready When the TR LED is lit the modem is permitted to a
89. f your right to file a complaint with the FCC if you believe it is necessary 103 MultiModemBA User Guide 6 The telephone company may make changes in its facilities equipment operations or procedures that could affect the operation of the equipment If this happens the telephone company will provide advance notice in order for you to make necessary modifications in order to maintain uninterrupted service 7 If trouble is experienced with this equipment the model of which is indicated below please contact Multi Tech Systems Inc at the address shown below for details of how to have repairs made If the trouble is causing harm to the telephone network the telephone company may request you remove the equipment from the network until the problem is resolved 8 No repairs are to be made by you Repairs are to be made only by Multi Tech Systems or its licensees Unauthorized repairs void registration and warranty 9 This equipment should not be used on party lines or coin lines 10 If so required this equipment is hearing aid compatible 11 Manufacturer Multi Tech Systems Inc Trade Name MultiModem Model Number MultiModemBA FCC Registration No AU7USA 65363 MD E Ringer Equivalence No 0 5B Modular Jack USOC RJ 11C or RJ 11W single line Service Center in USA Multi Tech Systems Inc 2205 Woodale Drive Mounds View MN 55112 U S A 763 785 3500 763 785 9874 U S Fax 763 785 9874 Canadian Limitations Not
90. figuration amp S Register Parameters in Non Volatile Memory amp W The modem can store configuration parameters and S Register values in its nonvolatile read write Random Access Memory RAM memory The amp W command does this which prevents any re configuration from being lost on a power down or Reset ATZ condition amp WO or AT amp W causes the modem to store your customized AT command settings and S Register values in its nonvolatile RAM amp W0 also sets the modem so that it reads your customized settings stored in nonvolatile RAM when powered down or reset The amp W0 command only changes the settings stored in nonvolatile RAM that you specifically intend to alter All other default parameters are applicable amp W1 causes the modem notto store your customized settings to nonvolatile RAM so that after powering down or resetting the modem it reads the factory default settings stored in ROM 31 MultiModemBA User Guide 32 Loading Factory Defaults amp F The amp F command provides a choice between customized configuration settings in RAM and the factory default configuration settings in ROM The amp F8 and amp F9 commands define the function of the amp F command The modem is shipped from the factory with a pre configured set of command and S Register default settings This set of factory defaults can be recalled by issuing the amp F command In addition to being able to recall the factory installed defaults the
91. figuration features operate These features use a multilevel security system which involves the use of LOGIN Passwords Setup Passwords and Remote Escape Characters The primary level security code is the modem s LOGIN Password Once this password is entered other passwords can be used For instance entering the LOGIN Password will allow you to enter the Setup Password which in turn allows you to enter Callback Passwords and dial back phone numbers Callback Passwords tell your modem what dial back phone number to call The Remote Escape Character is the key to using the Remote Configuration feature The Remote Escape Character lets you enter Command mode via a remote call so that you can enter AT commands just as if you were locally connected You must also enter your modem s Setup Password The Remote Escape Character is contained in S Register S13 Callback Feature Description The Callback feature protects your network from unauthorized access and helps control long distance costs By use of Callback Passwords and dial back phone numbers you can have your modem dial back remote locations immediately after being called A special command Enable Callback DB turns your modem into a Callback security modem The Callback Password Phone number entry is protected by two level security your modem s LOGIN Password and Set Up Password that keeps unauthorized personnel from changing parameters When you first get your modem you need to change
92. forever C Auto Answer behavior 1 Auto Answer mode after 2 rings if no DIC 3 Austria c 4 France a b c 5 Belgium a b c 6 Singapore a b Appendix E MultiModemBA Cables Command Indication modification none Delayed and Forbidden list behavior 1 No delay between retries 2 After 2 retries to numbers that answer but give no answer tone CFINT the number is put on the forbidden list 3 After 10 retries with busy or no dialtone the number is put on the forbidden list 4 The number remains on the forbidden list forever 5 Delayed and Forbidden Numbers lists are checked when dialing in AT mode If dialing is not possible then NO CARRIER is the response Auto Answer behavior 1 Auto Answer in 5 seconds if no DIC Command Indication modification none Delay and Forbidden list behavior 1 2 min delay after 1st call 4 after 2nd 6 after 3rd etc 2 After 5 retries the number is put on the forbidden list 3 The number remains on the forbidden list forever 4 Delayed and Forbidden Numbers lists are checked when dialing in AT command mode If dialing is not possible then No Carrier is the response Auto Answer mode behavior 1 Auto Answer in 5 seconds if no DIC Command Indication modification none Delay and Forbidden list behavior 1 1 min delay between calls 2 After 4 retries the number is put on the forbidden list 3 The number remains on the forbidden list for 1 hour aft
93. gs Which Have Occurred 50 S S Registers SO ola 18 Safety Warning Telecom essssss 15 SDLOC BSC OPON sasira o enia oret eoa hone 67 Send Xon Xoff Characters X 42 SetalcablG Luisiana 83 Serial POM sere nece dans Gee ederent cadens 18 19 83 Serial Port Baud Rate SB 45 SEnalporniS spuesi olii 45 servicing your Modem 2 iii 104 SESSIONS latini 18 Set Pulse Dial Ratios amp P siisay 29 Signal Strength information 48 Signal to Noise Ratio information SNR 48 Slave GIGGRING rta 69 Slow File Transfer mariinien 85 Simiartalalifitges ich 34 SPEAkelri cu riale 10 Speed Conversion BA 44 Speed SWIIGHBS scsi ioni 71 Storing Phone Numbers D N 30 108 SUMMA illa 56 Synchronous Transmit Clock Select amp X 32 T Telephone ilie aos ila 84 Terminal MOUS ia 82 Terminal Computer Initiated Pacing amp E13 42 yc 82 84 CI a eaten tn 82 Time Elapse for Escape Sequence 54 Time for Carrier Abort Timer 51 Tone Dialing Tone Spacing and Duration 52 TPC uri 9 TRANSMISSION Speed eere 19 Transmit WOVEN eem 10 Two Wire Leased Line Connection 102 U UART iot imt aio 45 VARTS aree 19 jii iso a aa 19 160990 19
94. he phone line If no responding carrier tone is received by your modem within forty five seconds or some other time as determined by S Register S7 your modem stops transmitting its tone hangs up and goes back into Command mode 47 MultiModemBA User Guide 48 Exiting Command Mode Going Back On Line O You can bring the modem out of Command mode and back into On Line mode by entering ATO where O is the letter O not the number 0 In this case the O command reverses what was done by entering the Escape Code The O command will bring the modem into the same On Line mode Originate or Answer that it was in prior to going into Command mode 4 4 13 Line Probe Commands Before V 34 negotiation takes place remote and local modems transfer their functional capabilities using modulated calling and answering tones indicating the common capabilities of the modem at each end Once this is done a probing signal is passed between the modems to identify impairments in the telephone channel e g Receive Signal Strength vs Frequency Noise vs Frequency and Signal to Noise Ratio vs Frequency After receiving the results of the probing signal the modem receivers and transmitters begin with the lowest speed and move up until reaching the highest speed at which they can exchange data All this occurs in about five seconds There are a number of Line Probe Commands These commands are configurable and can be stored to RAM via AT amp WO T
95. hem also When two MultiModems are connected in Normal mode not using error correction Xon Xoff can be used to control the flow of data between the modems Flow Control can be turned on or off with the Normal Mode Modem Flow Control commands When the modems are connected in Reliable mode a different method of modem Flow Control is used and the commands for Normal Mode Modem Flow Control are ignored When you are using Speed Conversion in Normal Mode you must activate the modem s Normal Mode Modem Flow Control 41 MultiModemBA User Guide 42 Send Xon Xoff Characters X The X phone interface command allows the modem to send either a single or multiple Xoff characters at the modem s buffer full level When the modem s buffer reaches it s buffer full level the next character received causes another Xoff to be sent for every character subsequently received by the modem The AT X0 command factory default setting causes one Xoff to be sent until the buffer reaches the Xon level The ATZX1 command causes an Xoff to be sent for every character received after the modem reaches its buffer full level Hewlett Packard ENQ ACK Pacing amp E9 If the modem is being used with Hewlett Packard or similar equipment that employs ENQ ACK pacing the modem can be configured to respond to ENQ ACK commands making it compatible with HP systems Doing so does not affect any other flow control or pacing already configured in the modem Whe
96. hese commands are listed below Enable Disable Reading of Line Probe Information Commands DPO Do not read Line Probe information from DSP during handshake Default DP1 Read Line Probe information from DSP during handshake Format of Line Probe Graph or Table Commands DFO Data is displayed in Graph format Y axis is shown in dBms Default DF1 Data is displayed in Table format Numeric values are displayed for 150Hz to 3750Hz in 75HZ increments Immediate Action Line Probe Commands To activate these commands first type AT lt CR gt on line escape command while maintaining command mode then type the Command prefixed by an AT amp RP This command initiates a retrain that makes the processor read Line Probe information Valid only when on line in V 34 mode L9 Displays Signal Strength information L10 Displays Signal to Noise Ratio information SNR L11 Displays noise information Multi Chapter 5 S Registers Multi c 9 ystems MultiModemBA User Guide 5 1 50 Introduction Certain Command Mode configurations are stored in memory registers called S Registers The S command is used to assign a value to and to read the current value of an S Register To assign a value to an S Register enter the letter S followed by the S Register number and an equals sign and then a decimal response to the message ENTER THE NEW VALUE IN DECIMAL FORMAT To read an S Register value enter th
97. hit RETURN Your modem responds with OK To change your Remote Configuration feature status 5 f you want Remote Configuration off set S Register S13 to 0 zero Refer to Chapter 6 for details on how to set S Register values 6 If you want Remote Configuration on and wish to change the Remote Escape Character change the S Register S13 value If you leave it at the default value decimal 37 96 sign will be your modem s remote escape character To turn your modem s Callback Security feature on and off 7 If you want Callback Security with both remote and local password security enter ATZDB1 and hit RETURN You must turn on Callback Security to be able to enter dial back phone numbers 8 If you want Callback Security on with just remote password security enter ATZDB2 and hit RETURN You must turn on Callback Security to be able to enter dial back phone numbers If you want to use your modem to call another modem that is also set for Callback you must enter AT DB3 before you dial Note this is for your modem if you are set for DB1 or DB2 Once you have disconnected from that call your modem will go back to its original setting 9 If you want Callback Security turned off type AT DBO and hit RETURN To set parity of the password message prompt 10 The parity default value for your modem is no parity ATZPO If your modem s prompt messages use even parity enter ATZP2 and hit RETURN For odd parity enter ATZP1 and hit RETURN
98. ice 104 Notice The ringer equivalence number REN assigned to each terminal device provides an indication of the maximum number of terminals allowed to be connected to a telephone interface The termination on an interface may consist of any combination of devices subject only to the requirement that the sum of the ringer equivalence numbers of all the devices does not exceed 5 Notice The Industry Canada label identifies certificated equipment This certification means that the equipment meets certain telecommunications network protective operational and safety requirements The Industry Canada label does not guarantee the equipment will operate to the user s satisfaction Before installing this equipment users should ensure that it is permissible to be connected to the facilities of the local telecommunications company The equipment must also be installed using an acceptable method of connection The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment Users should ensure for their own protection that the electrical ground connections of the power utility telephone line
99. ine It is similar to the D command of the AT command set except that the number is first checked against the Delayed Number and Forbidden Number list If permitted depending on the country regulations in effect the number will then be dialed For example if you enter CRN7859875 and hit RETURN your modem will check the two lists If the number is on the Delayed Numbers list you can dial that number again after t minutes have passed If the number is on the Forbidden list a CFIFC message will be displayed You can use various commands from the AT command set within the CRN command line to facilitate the dialing process such as P T or for pulse dialing tone dialing and wait for dial tone V 25bis supports smart dialing To dial a phone number enter CRNad dd where dd dd is the phone number which can be up to 20 characters long using any character on the telephone pad 0 through 9 P T and Some additional dialing characters may be available based on country regulations Listing Delayed Phone Numbers RLD Command When a phone number is dialed by a CRN command and a connection is not made the number is entered in the modem s V 25bis Delayed Number list along with the number of retry attempts Any further dialing attempts will be delayed some amount of time determined by the regulations of each country While the delay is in progress the modem will give a DLC indication The list contains eight numbers When filled th
100. inserting a letter T or a P in the command string You can also configure the modem to either wait for and detect dial tones and busy signals which we call Wait for Dial Tone dialing or Smart dialing or work with timed pauses without dial tone and busy signal detection which we call Blind dialing see Section on X Command Note There is another method of dialing called DTR Dialing where by manipulating the DTR signal on pin 20 of the RS 232C V 24 interface a number stored in the modem s memory is automatically dialed See description of D command in this section for details Continuous Redial not used in BAI A or If you select the Wait For Dial Tone method of dialing see X3 or X4 command you can command the modem to continuously redial up to 10 re dials for DOC units a busy number until your call is answered This is done with the A command This command would be used only if you had already reached a busy number after executing a normal dial command You simply enter A you need not enter AT nor do you need to hit RETURN and the modem will redial the number for you If you again reach a busy signal it re dials again and again until it no longer detects a busy signal You can stop the modem from re dialing by pressing any key Another method used to cause the modem to redial a phone number continuously is to enter a colon at the end of the phone number The result is the same as if you had en
101. ion string depend on the capabilities of the modem and what you want it to do Some older communications programs require you to create the initialization string by yourself Most modern communications programs however provide you with a ready made initialization string that is automatically selected when you choose your modem model from a list It is a poor idea to use an initialization string intended for another modem especially one from another manufacturer because modem capabilities and command implementations vary from modem to modem However if your MultiModem does not appear on a modem list you may use the MultiModemll initialization string PC Initialization Strings We recommend the following initialization string for a MultiModem connected to a PC compatible computer when sharing a line with a telephone AT amp F X4 S0 0 M This string resets the modem to the factory default settings selects extended result codes with NO DIAL TONE and BUSY and turns off auto answer M must end every string sent to the modem from software It is the ASCII code for the RETURN key on most keyboards and the default code for the carriage return character in the modem and most communications programs The carriage return character is defined in the modem in S register S3 if you change it you must also change the carriage return character code used in your communications software If you send a command directly to the modem in terminal mode rather tha
102. is able to generate ACKs at the DTE interface Data is transmitted more time efficiently because the delay of waiting for data to be received then for an ACK to be returned at the remote end is eliminated The SP1 command enables UUCP spoofing and the default command SP0 disables UUCP spoofing Async Sync Mode Switching amp M This command can be used to set the on line mode to either synchronous or asynchronous AT amp MO will set the modem to Asynchronous mode and all communications will be Asynchronous in both On line and Command modes AT amp M1 causes the modem to communicate asynchronously when in Command mode and switch to synchronous mode while on line The modem defaults to amp MO asynchronous communications on reset or power up Synchronous Transmit Clock Select amp X The amp X command selects the Synchronous Transmit Clock Source in conjunction with DIP Switch 11 DIP Switch 11 in the UP position enables External clocking DIP Switch 11 in the DOWN position enables Internal clocking default position External clocking is when the DTE provides transmit clocking to the modem on pin 24 of the RS 232C interface Chapter 4 Command Mode amp XO is the default setting which allows DIP Switch 11 to control Internal External Clocking default Internal Internal clocking is when the modem provides transmit clock to the DTE on pin 15 of the RS 232C V 24 interface The amp X1 command overrides DIP Switch 11 and selects Exter
103. is also error correcting and then protocol establishment to determine parameters and to establish the error correction connection If you know that the other modem is a V 42 error correcting modem and you wish to use LAP M the L3 command disables the detection phase and goes directly to protocol establishment Both modems must have L3 in effect Auto Reliable Buffering A In Auto Reliable mode the modem is given four seconds to establish a Reliable connection After this four second period the modem drops to Normal mode Any data which is received during this period is typically discarded The A command can be used to cause the modem to buffer save data that is received during this Auto Reliable time out period This data will then be output by the modem after the CONNECT message AT A0 Discard data received during auto reliable time period AT A1 Buffer data received during auto reliable time period The factory default is A0 Enable Disable Auto Reliable Fallback Character F In Auto Reliable mode the modem is given four seconds to establish a Reliable connection If a single CARRIAGE RETURN is received from the remote modem during this four second period the Auto Reliable modem assumes that the remote modem is not in Reliable mode and drops to Normal non error correcting mode The CARRIAGE RETURN is the only character which causes the modem to drop to Normal mode Any other character will either be buffered or discarded
104. le stored number d is dialed and if busy stored number e is dialed Exit Command Mode and go into On Line Mode Modem will pulse dial numbers following the P amp PO means 60 40 pulse ratio amp P1 means 67 33 pulse ratio QO means Result Codes sent Q1 means Result Codes will be suppressed quiet Q2 means Dumb Answer Mode amp QO selects Multi Tech command set amp Q1 selects AT command set RO means modem will not reverse modes R1 means modem will reverse modes amp RO lets Clear to Send act normally amp R1 forces Clear to Send on amp R2 drops for 1 second on disconnect Command Initiates a Retrain that makes the processor read Line Probe Information valid only in V 34 mode RO means disconnect after 12 retransmits R1 means do not disconnect after 12 retransmits amp RFO selects CTS follows RTS amp RF1 selects CTS to act independently Sets value of Register r to value of n where n is entered in Decimal format Reads value of Register r and displays value in 3 digit Decimal format SBn amp SFn amp Sn SPn amp Tn Tn Un VDn Vn amp Wn n speed n 2 Oor 1 n 0 10r2 n Oor1 ii n 4or5 n Oor1 n 0 1 2 or3 n O or 1 n Oor1 n Oor1 Appendix C AT Command Summary SB300 selects 300 bps at serial port SB1200 selects 1200 bps at serial port SB2400 selects 2400 bps at serial port SB4800 selects 4800 bps at serial port SB9600 sele
105. les MultiTech Systems Flash Wizard Step 5 Clear Your Stored Parameters Before you flash your modem you should record the parameters that are currently stored in it so you can reprogram it after flashing After you have recorded them send the AT amp W1Z command to the modem to clear the stored parameters 1 Run your favorite terminal program If you are using Windows 95 or above you can use Windows HyperTerminal 2 Inthe program s terminal window type AT amp V and press ENTER to list your modem s current parameters 3 Record your parameters by saving the screens and sending them to your printer 4 Type AT amp W1Z and press ENTER to clear your stored parameters and reset your modem to factory default 5 Close the terminal program 80 Appendix A Upgrading Your Modem s Firmware Step 6 Upgrade the Modem s Firmware 6 Before you begin the following procedure read the README TXT file extracted from the upgrade archive file Note the file name for the new firmware example ARQG125A HEX WARNING Never install an older version of firmware over a newer version Doing this WILL DESTROY THE FLASH PROM If the flash PROM is destroyed the modem must be sent in for repair Run Flash Wizard by double clicking its icon or file name or by selecting it from the Start menu The Identifying Devices dialog box is displayed as Flash Wizard locates and identifies the devices connected to your system Note If the message ERR
106. m already has the current firmware there is no need to update it Download the upgrade file and the appropriate Flash Wizard for your modem Install the Flash Wizard and extract the firmware HEX file from the file you downloaded Document and clear your stored parameters Upgrade the modem s firmware using the HEX file and the Flash Wizard NOONA o Restore your parameters Step 1 Identify the Modem Firmware You must know the model number and firmware version of your Multi Tech modem to know whether or not you should update it 1 Run your favorite terminal program If you are using Windows 95 or above you can use Windows HyperTerminal 2 Inthe program s terminal window type AT amp F Even if you cannot see the AT amp F command on your screen be sure to type it completely and then press ENTER If the modem does not respond with OK repeat the AT amp F command 3 Now type ATI press Enter and record your results The model number and firmware version should appear Step 2 Identify the Current Firmware Version Identify the current version of the firmware at the Multi Tech Web site If your modem already has the current firmware there is no need to update it 1 Using your favorite Web browser go to http www multitech com SUPPORT MultiModemZBA firmware asp 2 Scroll down to your modem model number 3 Look at the firmware version number for your modem 4 Ifthe firmware version number matches the firmware ver
107. m will also dial the indicated extension number Note To view Callback Passwords Numbers use the L Command To store changed parameters to memory enter AT amp WO and hit RETURN Note If you have enabled Callback Security ZDB1 in step 2 of Table 6 2 the modem will be secured locally To gain local access you must again perform steps 7 and 8 Chapter 6 Callback Security and Remote Configuration 7 Enter your modem s LOGIN Password as selected in Table 6 1 by entering AT Ixxxxxxxxxx lt CR gt xxxxxxxxxx from Table 6 1 8 Enter your modem s Setup Password as selected in Table 6 1 by entering AT Syyyyyyyyyy lt CR gt yyyyyyyyyy from Table 6 1 Table 6 3 Callback Operational Sequence Procedures Perform the following steps when dialing into a dialback modem Step Procedure 1 When called the modem answers and after a slight delay responds with Password 2 Enter your modem s LOGIN Password Table 6 1 and hit RETURN If entered correctly the modem responds with DB 3 Enter the Callback Password corresponding to the phone number you wish called back and hit RETURN Callback Passwords and phone numbers entered in Table 6 2 You can also use special characters and They must have been entered as part of the Callback phone numbers in Step 5 of Table 6 2 If you use the character along with your password the Callback modem will connect directly without hanging up and calling back If you use the character along
108. ment complies with part 68 of the Federal Communications Commission Rules On the outside surface of this equipment is a label that contains among other information the FCC registration number This information must be provided to the telephone company 2 The suitable USOC jack Universal Service Order Code connecting arrangement for this equipment is shown below If applicable the facility interface codes FIC and service order codes SOC are shown 3 An FCC compliant telephone cord and modular plug is provided with this equipment This equipment is designed to be connected to the telephone network or premises wiring using a compatible modular jack that is Part 68 compliant See installation instructions for details 4 The ringer equivalence number REN is used to determine the number of devices that may be connected to the telephone line Excessive RENs on the telephone line may result in the device not ringing in response to an incoming call In most but not all areas the sum of the RENs should not exceed 5 0 To be certain of the nuber of devices that may be connected to the line as determined by the total RENs contact the local telephone company 5 If this equipment causes harm to the telephone network the telephone company will notify you in advance that temporary discontinuance of service may be required But if advance notice is not practical the telephone company will notify you as soon as possible Also you will be advised o
109. n The serial port may be defective If you have another serial port install the modem on it change the COM port setting in your software and try again The modem may be defective If you have another Multi Tech modem try swapping modems If the problem goes away the first modem is possibly defective Call Tech Support for assistance 83 MultiModemBA User Guide 84 The Modem Dials But Cannot Make a Connection There can be several reasons the modem fails to make a connection Possibilities include lack of a physical connection to the telephone line a wrong dial tone a busy signal a wrong number no modem at the other end a faulty modem computer or software at the other end incompatibility between modems You can narrow the list of possibilities by using extended result codes To enable them enter ATV1XA and press ENTER while in terminal mode or include V1X4 in the modem s initialization string When you dial again the modem will report the call s progress If the modem reports NO DIALTONE check that the modem s telephone line cable is connected to both the modem s LINE jack not the PHONE jack and the telephone wall jack If the cable looks secure try replacing it If that doesn t work the problem may be in your building s telephone installation To test the building installation plug a telephone into your modem s telephone wall jack and listen for a dial tone If you hear a dial tone your modem may be ins
110. n by picking up another phone If this is a frequent problem disconnect the extension phones before using the modem or install another phone line especially for the modem Check for loose connections between the modem and the computer the telephone jack and AC power The Modem Cannot Connect When Answering Auto answer may be disabled Turn on auto answer in your datacomm program or send the command ATSOz1 to your modem in terminal mode File Transfer Is Slower Than It Should Be You may have an older UART For best throughput install a 16550AFN UART or a Multi Tech ISI serial port card See the Quick Start chapter for information on how to identify your UART If you are running under Windows 3 1 and have a 16550AFN UART you must replace the Windows serial driver COMM DRV to take full advantage of the UART s speed If you are using a slow transfer protocol such as Xmodem or Kermit try Zmodem or Ymodem G instead Is your line noisy If there is static on your line the modem has to re send many blocks of data to insure accuracy You must have a clean line for maximum speed Are you downloading a compressed file with MNP 5 hardware compression enabled Since hardware data compression cannot compress a file already compressed by an archiving program the transfer can be marginally slower with data compression enabled than with it disabled Try entering the L8 List Online Diagnostics command in on line mode making a screen pri
111. n configured for ENQ ACK the ENQ Control E and ACK Control F signals from the HP equipment will be accepted and responded to according to Hewlett Packard protocol Normal Mode Modem Flow Control On amp E11 When two MultiModems are connected in Normal mode not using error correction Xon Xoff can be used to control the flow of data between the modems Flow Control can be turned on or off with the Normal Mode Modem Flow Control commands When the modems are connected in Reliable mode a different method of modem flow control is used and the commands for Normal Mode Modem Flow Control are ignored When you are using Speed Conversion in Normal Mode you must activate the modem s Normal Mode Modem Flow Control Terminal Computer Initiated Pacing amp E13 As mentioned earlier the modem can initiate flow control by issuing Xon Xoff commands or toggling the CTS signal on the RS 232C interface The modem can also be configured to react to similar commands and signals from the computer or terminal to which it is attached via the RS 232C interface We refer to the computer or terminal initiated flow control as Pacing When the modem is set for Pacing On the modem will respond to the terminal or computer pacing When the modem is set for Pacing Off it will ignore pacing In order for the modem to be set for Pacing On a modem initiated method of flow control must be previously selected Once this is done the modem will respond to either Xon Xoff
112. n indirectly through communications software you must end the command string by pressing the RETURN key CR instead of adding M to the string The following initialization string is for a MultiModem on a telephone line that functions solely as a DATA LINE AT amp F X4 S0z 2 M 3 5 Chapter 3 Software Configuration 3 4 1 Changing Default Parameters By default the modem will answer after the first ring and try to communicate with a modem on the other end of the line If you have one telephone line for voice fax and modem communications the modem may attempt to answer all incoming calls voice as well as data To change auto answer to default off open your communications program and type the following string in the terminal window AT amp F S0 0 amp F9 amp W0 lt CR gt This string selects the factory default parameters then turns auto answer off and stores that setting along with all other current parameters in nonvolatile memory The amp F9 command causes the modem to load the values from nonvolatile memory the next time it receives the amp F command You will use the same initialization string as before AT amp F X4 M But now the modem will load the values stored in nonvolatile memory when you turn on the modem and when you issue the ATZ or AT amp F reset commands Note Because it clears the command buffer you should not use ATZ in an initialization string 3 4 2 Other Parameters The default values for
113. n order to match up with Standard AT responses The modem provides Basic and Extended Result Code sets The difference between the two is the Basic set provides one response CONNECT to indicate a connection while the Extended set provides several responses for different speeds CONNECT CONNECT 2400 CONNECT 4800 CONNECT 9600 Etc When the Extended set is chosen you also have the option of matching them up with Standard AT 2400 response code sets by including or not including the BUSY and or NO DIAL TONE responses while excluding the DIAL TONE response The X command is used to select which responses are provided Regarding the modem s method of dialing the modem can detect standard dial tones and busy signals This capability smart dialing allows the modem to wait for a dial tone and when one is detected to begin dialing immediately The modem also can detect a distant busy signal if after dialing it reaches a busy number This is useful because it allows the modem to immediately abandon a call rather than wait 45 seconds for a carrier signal that will never come S Register S7 defines the wait for carrier time refer to Chapter 6 The modem gives you a choice between the wait for dial tone smart method we just described and blind dumb dialing where instead of detecting actual dial tones the modem relies on timed pauses When the wait for dial tone method is chosen the busy signal detection capability is
114. nager type MSD and press ENTER Then select Mouse COM Ports and IRQ Status and note the addresses and IRQs that are in use If you find an IRQ conflict note which IRQs are not being used then change one of the conflicting devices to use one of the unused IRQs If you find an address conflict change the address of one of the conflicting devices To change a port address or IRQ in Windows 3 1x double click the Control Panel icon then the Ports icon Click on the port you want to change click Settings click Advanced and select the new port address and or interrupt If you wish to use COM8 or COMA note that COMS shares an IRQ with COM1 as does COM4 with COM2 so you should change their IRQs to unused ones if possible If you use Windows 95 right click on My Computer select Properties from the menu click on the Device Manager tab double click on Ports then double click on the Communications Port your modem is connected to In the port s Properties sheet click on the Resources tab to see the port s Input Output range and Interrupt Request If another device is using the same address range or IRQ it will appear in the Conflicting Device List Uncheck Use Automatic Settings to change the port s settings so they do not conflict with the other device or select the port the conflicting device is on and change it instead If you need to open your computer to change switches or jumpers on the conflicting device refer to the device s documentatio
115. nal clocking If DIP Switch 11 is UP External clocking you can not override Internal clocking amp X2 enables Slave Clocking The amp X2 Command causes the modem to generate the transmit clock timing pin 15 from the receive clock pin 17 from the DTE therefore 15 and 17 are the same In this mode Slave Clocking all timing is controlled by the receive clock 4 4 5 Command Response Result Code Commands Echo Command Mode Characters E If the modem is connected to a full duplex computer it may be necessary for the modem to be configured to echo back characters entered while in the Command Mode in order for them to be displayed The E command is used to configure the Command Mode echo with ATEO disabling the echo and ATE1 enabling the echo default Result Codes Enable Disable and No Response Answer Q The Q command enables or disables Result Codes and the No Response Answer mode of operation Result Codes may be disabled altogether in certain applications such as computer controlled auto dialing using the Q command ATQ 1 disables Result Code transmissions ATQ0 or ATQ enables Result Code transmission Regarding No Response Answer you may want the answer mode handled without responses and echo turned off but want the originate mode still intelligent This is called the No Response Answer mode ATQ2 selects the No Response Answer mode If you do not select any mode the factory default setting enable Result Codes is automatic
116. nd if synchronous mode is enabled with AT Command mode enabled then V 25bis mode is selected Prior to executing this command make sure that your modem is properly set up to perform the type of operation you will be performing Refer to the initialization section of this appendix for information about modem set up When in V 25bis mode most normal AT commands will also function except D N O and U V 25bis operates in asynchronous or synchronous modes depending on the position of DIP Switch 12 and does not check for terminal speed so do not change speeds while in this mode or parity In synchronous mode speed is not important since the internal clocks provide synchronization To place your modem in V 25bis mode from asynchronous mode enter the AT V1 command To return to AT command mode enter the AT VO command AT V2 allows you to run one V 25bis command from AT command mode without leaving AT command mode the V 25bis command follows V2 on the command line Change Serial Baud Rate CSP Command The CSP command will change the serial baud rate of your modem by entering CSPsssss where SSSSS can equal 0300 300 bps 1200 1200 bps 2400 2400 bps 4800 4800 bps 9600 9600 bps 19200 19200 bps 38400 38400 bps 57600 57600 bps 115200 115200 bps Appendix D V 25bis Operation Dial Phone Number Provided CRN Command The CRN command permits the dialing of the phone number immediately following it from the command l
117. nds which require CTS to act in this manner To allow CTS to act normally enter the command AT amp RO To force CTS on enter the command AT amp RI this is the factory default setting When the modem goes on line CTS still provides flow control To set up CTS so that it drops for one second on disconnect and then comes up again enter the command AT amp R2 If you want the drop time to be something other than one second use S Register S24 to change this value Data Set Ready Control amp S The amp S command allows you to control the status of the Data Set Ready signal DSR pin 6 on the RS 232C interface You have three choices You can force the signal high allow it to act normally or set it to stay high until the modem disconnects go low momentarily and then go high again The last option is useful with some CBX phone systems and mainframe front ends which require DSR to act in this manner To allow DSR to act normally enter the command AT amp S1 the default setting To force DSR on enter the command AT amp SO To set up DSR so that it drops for one second on disconnect and then comes up again enter AT amp S2 If you want the drop time to be something other than one second use S Register S24 to change this value CTS RTS Interaction Control amp RF In typical operation Clear to Send follows Request to Send when the modem is on line In other words if RTS goes off CTS goes off in response The amp RFO command enables C
118. nds to any other value from 0 up to 255 seconds This is done by setting S Register S8 refer to Chapter 6 Each comma in a dialing command counts as one of the sixty allowed characters Long Space Disconnect Y When two modems are connected in Normal mode i e without error correction there is no polite means of requesting a disconnect A link disconnect request packet is sent under reliable connections As a result some garbage may be received when a hang up command is issued The Y1 command enables the modem to use the break signal which accomplishes the hang up as an instruction to shut off its receiver and disconnect both modems must have Y1 enabled for this feature to be effective YO factory default disables this function Wait for New Dial Tone W A W inserted in the dialing command causes the modem to wait for another dial tone and not resume dialing until another dial tone is detected It is not necessary to enter a Wat the beginning of the dialing command to wait for a modem dial tone because the modem will do that first pause automatically In order for this command to work you must select Wait For Dial Tone dialing with the X2 or X4 command so that your modem will be able to detect the dial tone Return to Command Mode After Dial Command Execution A semicolon entered as the last character of a dialing command causes the modem to return to the Command mode immediately after executing the command instead of
119. ng number and a person answered instead of a computer or you might have dialed the correct number but the other computer or software was turned off or faulty Check the number and try again or try calling another system to make sure your modem is working Also try calling the number on your telephone If you hear harsh sounds then another modem is answering the call and the modems may be having problems negotiating because of modem incompatibilities or line noise Try connecting at a lower speed Appendix B Troubleshooting The Modem Disconnects While On line If you have call waiting on the same phone line as your modem it may interrupt your connection when someone tries to call you If you have call waiting disable it before each call In most telephone areas you can disable call waiting by preceding the telephone number with 70 check with your local telephone company You can automatically disable call waiting by including the disabling code in the modem s dial prefix e g ATDT 70 note the comma which inserts a pause before the number is dialed To change the dial prefix in Windows Terminal select Settings Modem Commands To change it in Windows 95 HyperTerminal select Call Connect from the menu bar click Dialing Properties check this location has Call Waiting and select the correct code for your phone service If you have extension phones on the same line as your modem you or someone else can interrupt the connectio
120. nswer an incoming call When it goes off a connected modem will disconnect The state of the TR LED matches that of the DTR circuit on Pin 20 of the RS 232C V 24 interface EC Error Correction This LED is lit when the modem is set for V 42 error correction and flashes on and off when data compression is activated FX FAX This LED is lit when the modem is connected in FAX mode 11 MultiModemBA User Guide 1 8 12 Controls on PC Board The MultiModem is designed on a single printed circuit PC board This board contains one 16 position DIP Switch numbered 1 16 The DIP Switches are accessible through a cut out on the side of the modem There is also a knob which is used to adjust the speaker volume This knob is accessible through the modem s rear panel The sixteen DIP Switches control various modem options or set default values for Command Mode operation There is a difference in how several of the switches operate depending on whether you are in synchronous or asynchronous mode Refer to the switch label on the bottom of the modem for an exact list of the switch functions in asynchronous and synchronous operation Multi Chapter 2 Installation and Connection Multi lech Systems MultiModemBA User Guide 2 1 2 2 14 What is in Your Modem Package Your MultiModem is made up of many components Make sure you have them all before trying to operate your modem e Multi zzi Quick Start
121. nswering modem is not compatible the MultiModem can match protocols provided the protocols are industry standard i e ITU or Bell and not proprietary The amp W command used in conjunction with specific other AT commands and S Registers can re configure the modem to conform to a specific application The command AT amp WO or AT amp W causes the modem to store its current parameters in its nonvolatile RAM The command also sets the modem upon power up or when it is reset with an ATZ command the modem reads all of its configuration and S Register parameters from RAM and not from the factory settings in ROM note you may recall factory installed defaults by entering AT amp F8 amp WO The amp W command changes the configuration parameters stored in RAM that you specifically intend to alter All other default parameters remain unchanged The AT amp W1 command sets the modem so that it does not store its parameters in RAM and on power up or when an ATZ command is issued parameters are read from the factory default settings in ROM Before using the amp W command you may want to view the modem s current operating parameters Use the ATL5 ATL6 and ATL7 commands to display the current modem configuration Multi Chapter 6 Callback Security and Remote Configuration Multi echi Systems MultiModemBA User Guide 6 1 6 2 6 3 58 Introduction This chapter describes how the MultiModem s Callback and Remote Con
122. nt of the diagnostics listing and checking for parameters that may be unacceptable number of retrains round trip delay etc I Am Losing Data If you are using data compression and a high speed serial port set the serial port baud rate to four times the data rate Make sure the flow control method you selected in software matches the method selected in the modem If you have a Macintosh you may have the wrong cable for hardware flow control Try entering the L8 List Online Diagnostics command in on line mode making a screen print of the diagnostics listing and checking for parameters that may be unacceptable number of retrains round trip delay etc 85 MultiModemBA User Guide 86 Am Getting Garbage Characters on the Monitor Your computer and the remote computer may be set to different word lengths stop bits or parities If you have connected at 8 N 1 try changing to 7 E 1 or vice versa using your communications software You may be experiencing line noise Enable error correction if it is disabled or hang up and call again you may get a better connection At speeds above 2400 bps the remote modem might not use the same transmission or error correction standards as your modem Try connecting at a slower speed or disabling error correction With no error correction however line noise can cause garbage characters Try entering the L8 List Online Diagnostics command in on line mode making a screen print
123. number stored at memory location xx Memory locations are 0 to 29 93 MultiModemBA User Guide 94 Password Command Summary Command IXXXXXXXXXX Syyyyyyyyyy Description Login Password is any keyboard characters x upper lower case sensitive minimum 6 and maximum 10 characters The default Login Password is IMULTI TECH Setup Password is any keyboard characters y upper lower case sensitive minimum 6 and maximum 10 characters The default Setup Password is SMODEMSETUP V 25bis Commands Command Vn CSPs CRNdd CRIdd nn DIC or CIC Appendix C AT Command Summary Description VO returns modem to AT command mode when in V 25bis mode V1 enables V 25bis mode of operation V2 allows modem to receive one V 25bis command while in AT command mode without leaving AT command mode V5 DSR follows DTR in V 25bis mode V6 DSR does not follow DTR in V 25bis mode Changes the serial bps rate CSP0300 300 bps CSP1200 1200 bps CSP2400 2400 bps CSP4800 4800 bps CSP9600 9600 bps CSP19200 19200 bps CSP38400 38400 bps CSP57600 57600 bps 2834 CSP115200 115200 bps Dials phone number dd where dd can be up to 20 characters 0 through 9 P T and Phone number is checked against the Delayed and Forbidden Number lists before dialed Dials dd same as CRN Command and ignores nn identification string The disregard or connect to incoming calls commands are used for auto
124. o identify them It then discusses communications configuration in general and recommends settings specifically for the MultiModem The last section of this chapter walks you through the basics of using your modem Configuring Your Software Communications software must be configured to work with your modem your computer and the remote system it is calling Fortunately most communications programs make the process easy by providing a default initialization string for your modem as well as defaults for most of the other required parameters 3 2 1 Configuring Software for Your Modem Because remote computers may have different connection requirements such as speed number of bits parity log on sequences etc communications software is typically configured by sessions each session having a unique configuration for a given connection Most communications programs however have a separate modem configuration menu because modem configurations rarely change from session to session The most important configuration is the modem initialization string This is a sequence of commands the software uses to configure the modem when the communications software is loaded or when a session begins Always begin the initialization string with the ATtention command AT then follow it with the modem reset command amp F Issuing a reset command before other commands ensures that you are starting with a known state The rest of the commands in the initializat
125. odes Asynchronous 11 Internal Clocking External Clocking Synchronous 12 Sync Async Mode Factory Default Setting Position UP DOWN UP DOWN UP DOWN UP DOWN UP DOWN UP DOWN UP DOWN UP DOWN DOWN UP UP DOWN UP DOWN UP DOWN UP DOWN UP DOWN UP DOWN UP DOWN UP DOWN UP DOWN Effect DTR Dependent on Interface DTR Forced On at All Times Hardware Flow Control XON OFF Flow Control SDLC Mode On BSC Mode On Command Mode Response Off Command Mode Response ON 15 dB Transmission leased line 9 dB Transmission leased line UUCP Spoofing Off UUCP Spoofing On AS 400 Mode Off AS 400 Mode On Automatic Answer On Automatic Answer Off Answer Mode On Originate Mode On Max Throughput On Max Throughput Off Slave Clocking Off Slave Clocking On RTS Dependent on Interface RTS Forced On at All Times Command Mode Off Command Mode On Local Digital Loopback On Remote Digital Loopback On Dial Up Operation Leased Line Operation AT Responses Multi Tech Responses External Clocking Selected Internal Clocking Selected Synchronous Mode On Asynchronous Mode On Chapter 7 DIP Switch Settings DIP Switches 13 14 Note The modem baud rate command MBn overrides the setting of these speed selection switches DIP switches 13 and 14 SWITCH CONDITION EFFECT 13 14 UP UP 28 8 K bps Operation 13 14 DOWN UP 19 2 K bps Operation 13
126. ommands Speed conversion is a necessary part of data compression since data must be presented to the modem faster than it can handle data if data compression is to be effective Speed conversion allows the modem to communicate at one speed over the phone line and at another speed at the RS 232C interface The speed also referred to as data rate or baud rate can be fixed at the RS 232 interface independently of the baud rate of the on line transmissions In addition to data compression another popular application for speed conversion involves an auto answer MultiModem connected to a computer that does not have autobaud capability This means that the computer must be set at a fixed baud rate regardless of the baud rate that the modem is communicating over the phone line at In this application speed conversion allows the modem to match its speed to that of the calling modem while at the same time communicating with the attached computer through its RS 232C port at a fixed baud rate which can be pre selected at 300 1200 2400 4800 9600 19 200 38 400 57 600 bps or 115 200 bps Speed Conversion BA When using speed conversion you must set the modem so that it does not adjust its speed at the RS 232C serial port even if the modem does adjust its data rate To turn Speed Conversion ON enter the command AT BAO and hit RETURN To turn Speed Conversion OFF enter AT BA1 and hit RETURN The modem will now match its RS 232C spe
127. operation and the methods used in each mode Next there is a summary of the modem s commands and responses We then go into a detailed explanation of each modem command providing examples where applicable Chapter 5 S Registers Chapter 5 covers the modem s S Registers which enable the user to establish read and modify various modem options All of the S Registers are charted and explained followed by instructions on accessing the S Registers and reading or changing their values 1 3 Chapter 1 Introduction and Description Chapter 6 Callback and Remote Configuration Chapter 6 documents instructions on how to operate the modem s Callback and Remote Configuration features and the usage of LOGIN Passwords Set Up Passwords and Remote Escape Characters as network management tools Chapter 7 DIP Switches Chapter 7 covers the modem s printed circuit board options Sixteen DIP Switch settings and the modem s speaker volume control are explained in detail including all default settings Chapter 8 Warranty Service amp Technical Support Chapter 8 provides statements on your five year warranty instructions for getting modems serviced at the factory and the procedure for downloading firmware upgrades via FlashROM Appendixes There are also several appendices at the end of this manual most of which repeat information contained in the chapters but in a more condensed form These appendices can be used as a quick reference
128. or each of the 30 memory locations as follows AT DP N0 CR number for location NO AT DT N1 CR number for location N1 etc Note You must indicate within the command string that the modem either Pulse dial ATDP or Tone dial ATDT The maximum length of the number is 35 characters The number may include commands as well as your number so as to create macro type command numbers The and or characters entered before the phone number are optional The Deposit Number code allows a caller to enter the number he or she wishes the Callback modem to call back when the caller uses a particular password Step 3 of Table 6 3 The character enables direct entry when the caller uses that correct password Step 3 of Table 6 3 without the Callback modem having to return the call The entry at the end of the phone number is optional and indicates a subcode number to the main phone number for that location The used to dial different extensions at the same basic number To use this optional feature enter the number of marks where indicated equal to the number of digits in the desired extension number i e with a 4 digit extension enter When a caller uses that particular password Step 3 of Table 6 3 he or she then enters an extension number directly after the password with the same number of digits as the number of marks originally entered When calling back that particular number your mode
129. orrection Data Compression Number of past Retrains etc Chapter 4 Command Mode Off Hook H You can make the modem hang up go On Hook Entering ATH1 RETURN brings the line Off Hook just as if you picked up the telephone set You can hang up by entering ATHO or ATH the default is 0 when no number is entered Escape Sequences Entering Command Mode While Still On Line AT lt CR gt It is possible to cause the modem to enter Command mode after the modem has gone on line with a remote modem without disconnecting the call This is done by entering an Escape Code The default Escape Code used by the modem is three plus signs followed by the letters A and T up to sixty command characters most typically H to hang up and a RETURN The number of command characters allowed after AT CR is defined by S Register S34 S Register S34 defaults to ten command characters When this is done the modem escapes to Command Mode executes the command if any and then remain in Command mode For example to hang up the modem at the end of a call enter ATH and hit RETURN There is no need to incorporate pauses before and after the plus signs as done in earlier modems BREAK AT lt CR gt The modem provides an alternative Escape method using a Break signal as the Escape Code The Break signal allows the start stop DTE data terminal equipment to signal the modem without loss of character transparency With this method
130. ot Allowed Not Allowed 97 MultiModemBA User Guide 98 V 25bis Responses Result Codes When in V 25bis mode the AT V1 command executed your modem provides you with several responses which can help you follow the progress of V 25bis operations These are similar to the Result Codes associated with AT Command mode operation The V 25bis responses are in the form of three character mnemonics as listed below INC Incoming Call same as RING indicator VAL A valid V 25bis command has been attempted DLCt Call delayed for t minutes number on Delayed list CFlrr Call failure indicator where rr equals et Engaged tone same as BUSY nt Call Answered but No Answer Tone ab Call Not Answered fc Number on Forbidden List ns Number not stored in memory ua User Abort nd No Dialtone ff Forbidden List full LSNmm ad dd Phone number in V 25bis memory LSDmm ad dd Phone number on the Delay list LSFmm dd dd Phone number on the forbidden list CON ssss Connection at ssss speed if X1 in effect V 25bis AT Commands The AT commands associated with V 25bis mode are described as follows Note that one command enables and disables V 25bis mode and the rest are only operable in the V 25bis mode Enable Disable V 25bis Mode V Command The function of the V command is to select the V 25bis mode in asynchronous mode Synchronous mode is set up with switches For example the modem could be in AT command mode AT V1 a
131. plugged in If the terminal reports that it cannot make a connection yet the modem s TR indicator is on click on the Window menu to see if more than one terminal is open The modem s TR indicator shows that the software has made a connection with the modem through the COM port Your communications software settings may not match the physical port the modem is connected to The serial cable may be plugged into the wrong connector check your computer documentation to make sure Or you may have selected a COM port in your software other than the one the modem is physically connected to compare the settings in your software to the physical connection If the modem is on the cable is plugged into the correct port the communications software is configured correctly and you still don t get an OK the fault may be in the serial cable Make sure it is firmly connected at both ends Is this the first time you have used the cable If so it may not be correct Check the cable description on the packaging to make sure the cable is the right one for your computer Peripheral expansion cards such as bus mouse and sound cards may include a serial port pre configured as COM1 or COM2 The extra serial port or the card itself may use the same COM port memory address or interrupt request IRQ as your communications port Be sure to disable any unused ports To look for address or IRQ conflicts if you use Windows 3 1x select File Run in Program Ma
132. quence If the time interval expires before the escape sequence is employed by hitting RETURN the escape sequence is aborted The default is 20 units S34 Buffer Length of Command Mode After On line Escape Sequence Unit ASCII Character Range 0 60 Default 10 Description If the number of characters after AT exceeds the S34 buffer length value the buffer is cleared and the escape sequence is aborted 5 2 Chapter 5 S Registers S36 Time Between DTR Inactive and Modem Off Hook Unit 1 Second Range 0 255 seconds Default 0 Description The DTR Busy out feature uses S Register S36 to set the time between DTR inactive low and the modem going off hook S36 can be set in one second intervals from 0 to 255 seconds With the default setting of 53620 DTR Busy Out is disabled i e DTR won t Busy Out S37 Time Between DTR Active and Modem On Hook Unit 1 Second Range 0 255 seconds Default 5 Description S37 sets the time between DTR being active and the modem going on hook not busy S37 will only function in conjunction with S36 S48 Program V 34bis Connect Speeds 2834 Series only Unit N A Range 33 31 28 26 24 21 19 16 14 12 96 and 48 Default 0 Description Defines which speed modem connects within the scope of Enhanced V 34 mode e g S48 26 means maximum connect speed is 26 4K This register compensates for line conditions that have trouble supporting higher Enhanced V 34 speeds e g
133. r 1 Yn n Oor1 Z P In Dial Command z In Dial Command In Dial Command In Dial Command AT lt CR gt BREAK AT lt CR gt Factory Default Setting 92 XO selects Basic Result Codes w o CONNECT 1200 CONNECT 2400 X1 selects Extended Result Codes w CONNECT 1200 CONNECT 2400 X2 selects Standard AT Command set with NO DIAL TONE X3 selects Standard AT Command set with BUSY X4 selects Standard AT Command set with NO DIAL TONE and BUSY X0 selects single XOFF character sent until XON level returns X1 selects multiple XOFF characters after buffer level is full YO disables sending or responding to long space break Y1 enables sending or responding to long space breaks All configuration parameters are reset to default values Causes pause during dialing Causes return to Command Mode after dialing Causes modem to flash On Hook Causes modem to wait for ringback then 5 seconds of silence before processing next part of command In band Escape Sequence Places modem in Command Mode while still remaining On Line Enter followed by the letters A and T up to ten command characters and a RETURN Out of band Escape Sequence Places modem in Command mode while still remaining On Line Enter a BREAK signal followed by the letters A and T up to sixty command characters and hit RETURN Appendix C AT Command Summary Callback Security Remote Configuration Command Summary Command
134. red products may be shipped freight prepaid to our Mounds View Minnesota factory Recommended international shipment methods are via Federal Express UPS or DHL courier services or by airmail parcel post shipments made by any other method will be refused A Returned Materials Authorization RMA is required for products shipped from outside the U S A and Canada Please contact us for return authorization and shipping instructions on any International shipments to the U S A Please include inside the shipping box a description of the problem a return shipping address must have street address not P O Box your telephone num ber and if the product is out of warranty a check drawn on a U S bank or your company s purchase order for repair charges Repaired units shall be shipped freight collect unless other arrangements are made in advance Please direct your questions regarding technical matters product configuration verification that the product is defective etc to our Technical Support department nearest you or email tsupport multitech com When calling the U S please direct your questions regarding repair expediting receiving shipping billing etc to our Repair Accounting department at 763 717 5631 in the U S A or email mtsrepair multitech com Repairs for damages caused by lightning storms water power surges incorrect installation physical abuse or user caused damages are billed on a time plus materials
135. rity you should change the SETUP password using this command in the following format AT Stttttttttt lt CR gt where tttttttttt is the current SETUP password Your modem will respond with OK indicating that you can enter the new SETUP password as follows AT s uuuuuuuuuu lt CR gt You can select any combination of keyboard characters upper lower case sensitive between six and ten characters long Erase Callback Password RCBNxx This command erases the single callback password specified by xx 0 through 29 Erase Callback Phone Number RDNxx This command erases the single phone number specified by xx 0 through 29 Remote Configuration Callback Security S Registers The following S Registers are used with Remote Configuration and Callback Security features Remote Configuration Character S13 S13 defines the modem s remote configuration escape character When the S13 character is entered three consecutive times from a remotely connected site your modem responds to it with its Remote Configuration procedure Units ASCII Range 0 127 Default 37 sign Callback Time Delay S15 S15 defines the time delay for Callback attempts after initial passwords have been exchanged between modems Unit Seconds Range 10 255 Default 20 Callback Attempts S16 16 defines the number of Callback attempts after initial passwords have been exchanged between modems Unit 1 Attempt Range 1 255 Default 4 Failed P
136. rs cisne a ana 19 3 42 OlherParametefis cioe alii 19 3 5 Configuring Software for Your Computers reale e 19 3 5 4 Configuring Software for the Remote System iii 19 35 Terminal sd iuo sian 20 35 3 File dranster Protocols c6 nose ettet inp etna sitas itus aiaa mea NN DEMNM EE AUD et 20 Chapter 4 Command Mode 21 4 1 sad e o MEER E A E T ET ATE E T re errr TE 22 Aled AT Command Editing TR 22 43 2 Fonciona Modo S etr inopes tn rela 22 4 2 Summan OFAT Command Skede a ila e cdi bra 23 4 3 Resulcodes gere ili aaa 26 4 4 Dialing Commands EE 27 44 Dialing Action C ommani Serre a edente ia 27 442 DialiModifierGommands arcella 28 4 4 3 Phone Number Memory CommandSs 30 4 4 4 Configuration and Default Storage Commands essent 31 4 4 5 Command Response Result Code Commands sese 33 4 446 Phone Line Conditioning Command oec elia 34 4 4 7 RS 232C Interface Control Commands sess enne nennen nnne nnns 36 4 4 3 Error GComection Commands ssaa 38 449 ow Control Command S eoe icone eroe otn eene ra ai 40 4 4 10 Compression Error Correction Flow Control Pass Through and Pacing Commands 43 4 4 11 Speed Conversion Commands i 44 4412 Immediate Action Commands sssicicc risaie ia 46 4 4 13 Line Probe Commands 48 Chapter B S Registefszusnionir ariana bn cd Ra NR ORE NR 49 bal Introduc
137. ru 15 n Oor1 n 0 thru 5 n Othru2 Description Store telephone number To store phone d 0 thru 9 number s is entered and followed by N and then Directory Number d amp DO DTR is ignored amp D1 means modem returns to command mode amp D2 lets modem react to DTR normally amp D3 causes modem to reset to modem default parameters DFO Line Probe Data in Graph Format DF1 Line Probe Data in Table Format DPO do not read Line Probe Information from DSP during handshaking DP1 read Line Probe Information from DSP during handshaking DO disables DTR Dialing D1 enables DTR Dialing EO means do not echo Command Mode Character E1 means do echo Command Mode characters amp EO means no error correction amp E1 means V 42 Auto reliable Mode amp E2 means V 42 Reliable Mode amp E3 means no modem initiated flow control amp E4 means CTS modem initiated flow control amp E5 means Xon Xoff modem initiated flow control amp E6 means Xon Xoff not passed through amp E7 means Xon Xoff passed through amp E8 means Eng Ack pacing off amp E9 means Eng Ack pacing on amp E10 means Normal Mode flow control off amp E11 means Normal Mode flow control on amp E12 means Pacing off amp E13 means Pacing on amp E14 means data compression disabled amp E15 means data compression enabled EBO enables 10 bit mode EB1 enables 11 bit mode E0 Modem Won t Escape 96 E1 Method default se
138. s and internal metallic water pipe system if present are connected together This precaution may be particularly important in rural areas Caution Users should not attempt to make such connections themselves but should contact the appropriate electric inspection authority or electrician as appropriate Appendix F Regulatory Information International Modem Restrictions Some dialing and answering defaults and restrictions may vary for international modems Changing settings may cause a modem to become non compliant with national telecom requirements in specific countries Also note that some software packages may have features or lack restrictions that may cause the modem to become non compliant EMC Safety and R amp TTE Directive Compliance CE The CE mark is affixed to this product to confirm compliance with the following European Community Directives e Council Directive 89 336 EEC of 3 May 1989 on the approximation of the laws of Member States relating to electromagnetic compatibility and e Council Directive 73 23 EEC of 19 February 1973 on the harmonization of the laws of Member States relating to electrical equipment designed for use within certain voltage limits and e Council Directive 1999 5 EC of 9 March on radio equipment and telecommunications terminal equipment and the mutual recognition of their conformity 105 MultiModemBA User Guide Index A Abort Timer seiottiallannalal eat 51 Answer Modera ruenalo
139. s data during auto reliable time period A1 buffers data during auto reliable time period A0 selects initial handshake at 33 600 to 31 200 to 28 800 to 24000 to 21 600 to 19 200 to 16 800 to 14 400 to 12 000 to 9600 to 4800 to 2400 to 1200 to 300 bps A1 selects initial handshake at 33 600 bps only A2 selects initial handshake at 33 600 to 31 200 to 28 800 to 24000 to 21600 to 19 200 to 16 800 19 200 to 14 400 to 9600 to 4800 bps A3 selects initial handshake at 2400 to 1200 to 300 bps Factory Default Setting BO selects V 21 answer tone B1 selects Bell answer tone amp BO means normal transmit buffer size amp B1 means reduced transmit buffer size amp BSO means maximum transmit block size of 64 characters amp BS1 means maximum transmit block size of 256 characters BAO means speed conversion is on BA1 means speed conversion is off amp CO forces Carrier Detect on amp C1 lets Carrier Detect act normally amp C2 lets Carrier Detect drop S24 time on disconnect amp C4 resets modem when Carrier Detect drops amp CDO execute cleardown on disconnect amp CD1 do not execute cleardown on disconnect Dial a telephone number s where s may include up to 60 digits or T P R comma and characters 87 MultiModemBA User Guide Command DsNd amp Dn DFn DPn Dn En amp En EBn En Fn 88 Values s phone n 0 thru3 n Oor1 n Oor1 n Oor1 n Oor1 n Oth
140. set attached to a modem and wish to receive voice calls that you yourself would answer instead of the modem Place DIP Switch 5 in the UP position to enable Auto Answer Place DIP Switch 5 in the DOWN position to disable Auto Answer Auto Answer Enabled Switch 5 UP Auto Answer Disabled Switch 5 DOWN Factory Default Setting UP Switch 5 Originate Answer Mode Asynchronous Synchronous Mode Leased Line The modem functions in either Originate mode or Answer mode Place DIP Switch 5 in the DOWN position to enable Originate mode Place DIP Switch 5 in the UP position to enable Answer mode Originate Mode Enabled Switch 5 DOWN Answer Mode Enabled Switch 5 UP Factory Default Setting UP Switch 6 Maximum Throughput Setting Asynchronous Mode Leased Line Dial Up Some applications require you to dial into services with maximum throughput on and other applications where maximum throughput must be off i e service not supporting error correction or the V 42 handshake interferes with logon sequence DIP Switch 6 is used for switching between these two modes This DIP Switch controls three important parameters error correction speed conversion and serial port speed which in effect enables or disables maximum throughput Maximum Throughput Enabled Switch 6 UP Maximum Throughput Disabled Switch 6 DOWN Factory Default Setting UP Chapter 7 DIP Switch Settings Switch 6 Slave Clocking Synchronous Mode Le
141. sion number found in Step 1 Identify the Modem Firmware you have the current firmware version and do not need to be update 79 MultiModemBA User Guide 5 Ifthe firmware version number is greater than the firmware version number found in Step 1 Identify the Modem Firmware your modem has an older firmware version Continue with Step 3 Download the Upgrade File Warning The first digit of the new firmware must match the first digit of the old firmware or the modem may not work properly E g if your current firmware version is 4 16 replace it only with 4 xx firmware not 6 xx firmware Step 3 Download the Upgrade File 1 If you are not already at the MultiModem s Firmware page of the Multi Tech Web site follow the procedure in Step 2 Identify the Current Firmware 2 Download the upgrade file for your modem by clicking its name and save the file in a temporary folder on your hard disk 3 Inthe same section of the Web page click the Flash Wizard utility for your operating system to download it and save it in the same folder Step 4 Extract the Upgrade Files 1 Install the Flash Wizard utility by double clicking the file name in Windows Explorer 2 Extract the upgrade files by double clicking the file name The extracted files include a HEX file which contains the upgrade data and a Readme file 3 Copy the upgrade HEX file into the Flash Wizard folder which in a default installation is at C Program Fi
142. t Description S13 1 mSec 1 255 80 255 70 80 S11 sets the speed of tone dialing spacing and tone duration times The default value is 70 units Decimal 7 or 80 units where each unit is one mSec meaning that each tone is on for 70 mSec with a 70 mSec pause between each The minimum S11 value allowed by most telephone systems is 50 mSec 50 units Very few telephone systems can handle anything faster than that The maximum S11 value is 255 mSec 255 units Remote Configuration Escape Character Unit Range Default Description ASCII Character 0 127 37 S13 defines the remote configuration escape character which becomes your modem s remote configuration character The default is three percent symbols 962696 When the S13 character is entered three consecutive times from a remotely connected site your modem responds with its Remote Configuration procedure Value for International and DOC units Value for International units only S15 Chapter 5 S Registers Callback Time Delay Unit Range Default Description S16 Seconds 10 255 20 15 defines the time delay between Callback attempts after initial passwords have been exchanged between modems Callback Attempts Unit Range Default Description S17 1 Attempt 1 255 4 16 defines the number of attempts allowed after initial passwords have been exchanged between modems Changing Break Time Unit Range Def
143. talled behind a company phone system PBX with an internal dial tone that sounds different from the normal dial tone In that case the modem may not recognize the dial tone and may treat it as an error Check your PBX manual to see if you can change the internal dial tone if you can t change your modem s initialization string to replace X4 with X3 which will cause the modem to ignore dial tones If the modem reports BUSY the other number may be busy in which case you should try again later or it may indicate that you have failed to add a 9 prefix to the phone number if you must dial 9for an outside line If you must dial 9to get an outside line the easiest way to dial it automatically is to include it in the modems dial prefix e g ATDT9 Note the comma which inserts a pause before the number is dialed By inserting 9 into the dial prefix you do not have to include it in each directory entry in the terminal To change the dial prefix in Windows Terminal select Settings Modem Commands To change it in Windows 95 HyperTerminal select Call Connect from the menu bar click Dialing Properties and type 9 in the local and long distance boxes in How I Dial from This Location If the modem reports NO ANSWER the other system has failed to go off hook or you might have dialed a wrong number Check the number If the modem reports NO CARRIER the phone was answered at the other end but no connection was made You might have dialed a wro
144. te renegotiation autodial redial repeat dial dial linking pulse or tone dial dial tone detection dial pauses call status display auto parity and data rate selection keyboard controlled modem options nonvolatile memory and on screen displays for modem option parameters and up to ten telephone numbers command lines of up to 60 digits each help menus 60 characters Trellis Coded Modulation TCM at 33 600 31 200 28 800 26 400 24 000 21 600 19 200 16 800 14 400 12 000 and 9600 bps Quadrature Amplitude Modulation QAM at 9600 non trellis 4800 and 2400 bps PSK at 1200 bps FSK at 300 bps MultiModemBA User Guide 1 6 10 Fax Modulations Transmit Level Frequency Stability Connectors Diagnostics Indicators Controls Speaker Operating Temperature Power Requirements Dimensions Weight Limited Warranty Power V 21CH2 FSK at 300 bps V 27ter DPSK at 4800 and 2400 bps V 29 QAM at 9600 and 7200 bps V 17 TCM at 14400 12000 9600 and 7200 bps 11dBm dial up 9 or 15 dBm leased line dBm level selectable with DIP Switch 3 in leased line setting 0 01 One DB 25 RS 232C connector two RJ11 for phone line telephone set power Power on Self Test Local Analog Loop Local Digital Loop Remote Digital Loop Back to Back Test LEDs for Transmit Data Receive Data Carrier Detect Speed Indicators Off Hook Terminal Ready Error Correction Fax and Error Toggle switches for Voice D
145. tection for asynchronous mode so when you are giving commands you must stay in your initial speed i e if you change your terminal speed while entering an AT command you will get no responses In synchronous mode the modem supplies the clock so the synchronous terminal knows the speed You must be in V 25bis mode for the commands described here to function Most AT commands will also function except those associated with dialing such as ATD ATN ATO and ATU To get into V 25bis mode you type AT V1 At this point your modem does no more speed or parity detection things associated with asynchronous operation To get out of V 25bis mode and back into AT command mode enter AT VO The AT V2 command allows you to run one V 25bis command from AT command mode without leaving AT command mode There is no command to select between asynchronous and synchronous V 25bis operation The position of DIP Switch 12 selects between modes For synchronous mode DIP Switch 12 must be UP and the AT command mode enabled Appendix D V 25bis Operation Another asynchronous mode concern is the problem of connecting at a different speed than the speed at which the serial port is set If your modem port speed is different from the serial port speed you must either 1 Enable speed conversion and have flow control on or 2 Enable connect responses with the ATX1 command and change the serial baud rate after receiving a connect message If the
146. tered A after personally observing that the number was busy on the first dialing attempt Using the colon in the dialing string is a step saver Dialing a Stored Number N A telephone number that you have stored in the modem s number memory may be automatically dialed by entering ATNn where n 0 1 2 3 4 5 6 7 8 or 9 For example a number stored at N3 would be dialed by entering ATN3 and RETURN Do not include the letter D in this command or the stored number will be erased 27 MultiModemBA User Guide 28 DTR Dialing D An alternate method of causing the modem to automatically dial is DTR Dialing Data Terminal Ready DTR is a signal that comes into the modem from the terminal or computer to which it is connected on pin 20 of the RS 232C interface In DTR dialing the modem automatically dials a stored number as soon as it receives a high DTR Signal The DTR dialing method is popular in synchronous applications To activate DTR Dialing enter AT D1 and hit RETURN The modem dials the phone number stored in the NO location of Memory when it receives a high DTR signal DTR must remain high for the duration of the call until disconnect To deactivate DTR dialing enter AT DO and hit RETURN Note when using DTR Dialing in a synchronous application be sure DIP Switch 8 is in the UP position to disable V 25bis Command mode Voice Data Dialing VD Another alternate method of causing the modem to automatically dial is Voice D
147. the AC Power transformer provided with your unit to the POWER connector on the modem and to a live AC outlet Refer to Figure 2 2 Note Only apply power to the modem using the power transformer provided with your unit Use of a power supply not designed for your unit could result in damage to your modem and will void the warranty 7 Apply power to the unit by setting the ON OFF switch at the rear of the modem to the ON Up position Refer to Figure 2 2 Installing Data Communications Software Data communications software is designed to send and receive messages Multi Tech includes a data communications software program PhoneTools with your modem However the modem will work with any data communications software To install PhoneTools insert the PhoneTools CD in you CD ROM drive and click the PhoneTools icon You will be asked to choose your language The software will then automatically load onto your PC 16 Multi Chapter 3 Software Configuration and Modem Basics Multi echi Systems MultiModemBA User Guide 3 1 3 2 3 4 18 Introduction Chapter 2 described the installation of PhoneTools a communications software If you are using a different software package there are some points you should take into consideration Since your communications software configuration is affected by the capabilities of your computer this chapter begins with a discussion of the limitations of some serial ports and how t
148. the next time the modem is powered up or reset with an ATZ command The command to set the Serial Port Baud Rate is AT SBn where n can be AT SB300 300 bps AT SB1200 1200 bps AT SB2400 2400 bps AT SB4800 4800 bps AT SB9600 9600 bps AT SB19200 19 200 bps AT SB38400 38 400 bps AT SB57600 57 600 bps AT SB115200 115 200 bps The factory default is for 2834 is 57 600 bps Note Some serial ports particularly those in older PC compatible computers may limit the performance of a higher speed modem like the MultiModem see Chapter 3 The limiting factor is a circuit called a Universal Asynchronous Receiver Transmitter or UART All data from your modem flows through it 8250 16450 and 16550 are UARTS typically used in PC compatible computers The 8250 is unreliable above 9 600 bps and the 16450 is unreliable above 19 200 bps The 16550 UART however is reliable to at least 115 200 bps With V 42bis data compression enabled the MT2834BA can achieve throughputs approaching 115 2K depending on line quality and file content If you presently do not have a 16550 UART in your PC we recommend that it be replaced with a Multi Tech high speed Intelligent Serial Interface ISI card It comes in one two and eight port versions for DOS Windows and UNIX systems and includes a 32 K buffer that eliminates data loss even at high speeds See your dealer for details 45 MultiModemBA User Guide 46 4 4 12 Immediate Action Commands
149. the other parameters in modem configuration menus rarely need changing They typically include the dialing prefix ATDT for touch tone service and ATDP for rotary service the dialing suffix M the hang up string ATHO M and response messages RING NO CARRIER BUSY etc Communications software with a host mode might also include an auto answer string AT SO 14M Configuring Software for Your Computer You must configure your communications software to match your computer s configuration If the modem is connected to the COM serial port you must tell the software you are using COM2 Another important parameter is the serial port baud rate This is the speed at which your modem communicates with your computer not the speed at which your modem communicates with another modem When V 42bis data compression is enabled you must have a serial port baud rate four times the transmission speed of the modem to fully optimize compression So if your UART is fast enough you should set the serial port baud rate to a minimum of four times the top speed of your modem If you have an 8250 UART your most reliable serial port speed will be 9600 bps if you have an 8250A or a 16450 UART try 19 200 bps if you have a 16550 UART or equivalent a serial port setting of 115 200 bps can be set reliably 3 5 4 Configuring Software for the Remote System You must meet the requirements of the remote system for successful communications Though the modem c
150. tiModemBA User Guide 4 3 26 Result Codes The Command mode provides you with several responses or Result Codes that can aid you in Command mode operation These Result Codes are displayed on your video monitor You can choose result codes that closely match those of the standard AT command set or choose enhanced function result codes that have been used in Multi Tech modems Multi Tech responses The amp Q command selects which result codes will be used You can choose to have these Result Codes displayed in either verbose full words or terse digits format This is controlled by the ATVO terse or ATV1 verbose commands The modem defaults to verbose format AT amp Q0 selects Multi Tech responses with Reliable LAPM Compression modifiers The terse response code for CONNECT 2400 is 9 AT amp Q1 selects Standard AT command set responses The terse result code for CONNECT 2400 is 10 The following tables define the result codes generated by the amp Q command refer to Appendix G for Result Code Summary Multi Tech Result Codes TERSE VERBOSE TERSE VERBOSE 0 OK 11 CONNECT 4800 1 CONNECT 12 CONNECT 9600 2 RING 13 CONNECT 14400 3 NO CARRIER 19 CONNECT 19200 4 ERROR 21 CONNECT 21600 5 CONNECT 1200 24 CONNECT 24000 6 NO DIALTONE 26 CONNECT 26400 7 BUSY 28 CONNECT 28800 8 NO ANSWER 31 CONNECT 31200 9 CONNECT 2400 33 CONNECT 33600 With MNP error correction on RELIABLE or R is added to these r
151. tioni iii 50 52 Reading and Assigning S Register Valls 2 dalia 55 52 1 Examples or Assigning Values rotten eris AE aaa 56 5 2 2 Examples of Reading Values ii api 56 5 3 AT Gommandiand S Register Sumbtnaly scri 56 Chapter 6 Callback Security and REeMole Coniiguration sea nx MERI RR arteria iii 57 6 1 uli oro Toni o n es T 58 6 2 Callback Feature Description illa sat 58 6 3 Remote Configuration DescriptiOlW oo iioc a lele ara 58 6 3 1 Initial Setup Procedures for Callback and Remote Configuration i 58 6 32 Remote Configuration Proc dures isara otii dee Patet Peas E Fore Pha A EU Roue bassa umet eua 61 6 4 Remote Configuration and Callback Security AT Commands sse 62 6 5 Remote Configuration Callback Security S Registers sss 63 Chapter 7 DIP Switch Settings cccrrracaianazineazioneanaonicceniiananeai nen nnmnnn nenna 65 fA INTOdUGHOn reale 66 7 2 DIP SwitchiOpiion Settingsi aiar 66 7 3 Speaker Volume Control aaa 71 7 4 Recording Option Configurations i 72 Chapter 8 Warranty Service and Tech Support eeeeeeeeeeeeeeeee 74 8 1 Introduction ETE 75 8 2 Multi Tech Systems Inc Warranty amp Repairs Policies i 75 8 3 Online Warranty Registration 2s aeo onto ood beca aa enc posten aaa 76 8 4 Replacement PANS P
152. toring Phone Numbers D N A telephone number and command line of up to sixty characters may be stored in the modem s number memory As many as ten of these numbers may be stored Each number will be given a name using the codes NO N1 N2 up to N9 A phone number is stored by entering ATD then the number as it would be dialed along with any P T R or comma characters and then entering N followed by the number s name which would be any number from 0 through 9 and then hitting RETURN For example the tone dialed number 1 612 631 3550 would be stored as number N3 by entering ATDT16126313550N3 and RETURN The number is not dialed with this store command After storing a number check to see that it has been stored correctly by typing ATL and hitting RETURN When phone numbers are stored the entire command line is also stored so that you can effectively create a macro for each number For example if you know a particular number needs to have extended result codes detect busy or dial tone error correction Xon Xoff flow control pacing and data compression enabled the command line would be ATX4 amp E1 amp E5 amp E13 amp E15DT16126313550N3 This would store the entire command at location N3 Chapter 4 Command Mode Number Linking NN You may command the modem to dial another number automatically if the first number dialed is busy This would be useful in a situation where a computer can be accessed through more than one phone
153. ts Store Configuration amp S Register Parameters Reset Modem Result Code Terse Verbose UNIX Spoofing Synchronous Asynchronous Mode Select Synchronous Transmit Clock Select Result Codes Enable Disable Response Result Code Selection Echo Command Characters Result Code Terse Verbose Result Code Basic Extended Call Progress Guard Tones Monitor Phone Line Remote Digital Loop Signal Enable Disable Trellis Coded Modulation Bell V 21 Tones Fallback When On Line Cleardown at Disconnect 2834 Series only Auto Speed Detect Carrier Detect Control Data Terminal Ready Control Clear To Send Control Data Set Ready Control CTS RTS Control DSR CD Control Normal Mode Auto Reliable Mode Reliable Mode Negotiate V 42 Mode During Handshake MNP On LAPM Off LAPM On MNP Off Direct LAPM Phase Out Handshake Auto Reliable Buffering Enable Disable Auto Reliable Fallback Character Retransmit Count Error Correction at 300 bps Flow Control Disabled Hardware Flow Control Xon Xoff Modem Initiated Xon Xoff Modem Responds No Pass Through Xon Xoff Modem Responds Pass Through Allowed Send Single Multiple Xoff Characters Enq Ack Off Enq Ack On Normal Mode Modem Flow Control Off Normal Mode Modem Flow Control On Computer Initiated Off Computer Initiated On Maximum Block Size 10 11 bit Asynchronous Format Parity Selection CONFIGURE DATA amp E14 Chapter 4 Command Mode Data Compression Disabled Data Compr
154. tting 96 E2 Break Method 96 E3 Either or Break Method 96 E4 No OK Response to 96 E5 OK Response to F0 means no fallback when on line F1 means fallbackwhen on line increments of 2400 bps F2 means fallback to 4800 bps fall forward if line improves increments of 2400 bps amp Fn Fn amp Gn Hn Hn 19 L5 L6 L7 L8 L9 L10 L11 Ln n 0 80r9 n Oor1 n 0 10r2 n Oor1 n21thru 3 n 0 1or 2 Read Only n Othru3 n Othru3 Appendix C AT Command Summary amp F loads factory default values from ROM amp F8 reads factory default values and switch settings when amp F is issued amp F9 reads parameters stored in non volatile memory when amp F is issued FO means do not fall back to normal connect if CR received F1 means fall back to normal connect if CR received amp GO turns off CCITT guard tones amp G1 turns on CCITT 550 Hz guard tone amp G2 turns on CCITT 1800 Hz guard tone HO means Hang Up go on hook H1 means Go Off Hook H1 brings up Help Screen 1 H2 brings up Help Screen 2 H3 brings up Help Screen 3 10 requests modem ID 11 requests firmware revision I2 for MTS internal use Command enables display of Windows 95 Autodetect characteristics Lists all stored telephone numbers in memory L5 lists all current operating parameters L6 lists all current S Register values L7 lists additional parameters L8 lists On Line
155. u through the physical connections required to make your modem operational Software loading is covered later in this guide Step Procedure 1 2 Verify that the settings for DIP Switch 5 and DIP Switch 10 match those of your system configuration The 16 position DIP Switch numbered 1 16 is accessible through a cut out on the right side as the LEDs are facing you of the modem chassis For a full description of all DIP Switch Settings refer to Chapter 7 DIP Switch Condition Effect 5 UP Selects Answer mode DOWN Selects Originate mode 10 UP Selects Dial Up operation DOWN Selects Lease Line operation indicates Factory Default setting Verify that the ON OFF switch at the rear of the modem to the OFF Down position 15 MultiModemBA User Guide 2 3 3 Connectthe modem to a dial up line by attaching the RJ 11 telephone cord provided with your unit to the LINE connector on the modem and to a dial up wall jack Refer to Figure 2 2 LINE EIA RS232C VOLUME _ Figure 2 2 MultiModemBA BAI Connections 4 Attach the EIA RS 232C connector on the modem to the serial port on your computer or terminal with an RS 232 or V 24 cable you supply Refer to Figure 2 2 5 Toconnect a telephone set to the modem optional plug one end of an RJ 11 phone cord into the PHONE connector on the modem and plug the other end into your telephone Refer to Figure 2 2 6 Attach
156. user s calling card number to originate an on line connection An symbol placed in the dialing string causes the modem to pause and wait for an AT amp T calling card or a 1600 Hz tone prevalent in the United Kingdom When the tone is detected the rest of the dialing string is processed If no tones are detected within the time period set by S Register S7 default 45 seconds the modem will abort by indicating a NO CARRIER message Hitting any key also aborts the command The following is an example of this command ATDT 10288061278535009123456789 access phone number credit card number Quiet Answer The 2 command causes the modem to wait before processing the next symbol in the dialing string The wait is for one or more ringbacks followed by 5 seconds of silence If the time specified by S Register S7 passes before the rings and silence a NO ANSWER R result code is processed The command is used for accessing a system that does not provide a dial tone For example ATDT5551212 6313550 causes the modem to dial the first number 555 1212 and wait for the time specified in S7 for at least one ringback and 5 seconds of silence If a busy signal is detected the modem hangs up and generates a BUSY result code If it does not detect 5 seconds of silence a NO ANSWER result code is generated after hanging up If 5 seconds of silence is detected the second number 631 3550 is then dialed 4 4 3 Phone Number Memory Commands S
157. waiting for a carrier signal and going on line For example entering ATDT5551212 would tone dial the number and do nothing afterwards except go back into Command mode This can be useful in dialing applications where modem data transfer is not desired such as voice communications or in applications involving the use of touch tones as a data entry method such as bank by phone Reverse the Mode of Operation R In certain operations you may need to reverse the mode of operation for your modem from originate to answer or answer to originate so that it would answer the phone and go into answer mode This command turns off the reversing function with the RO command and turns it on with the R1 command with the modem in either command mode If you want to reverse from the originate mode use A with no number in the dialing string 29 MultiModemBA User Guide 30 Flash On Hook Some switchboard systems react to a momentary On Hook An exclamation mark inserted in the command causes the modem to flash on hook for a half of a second as if you had held the switch hook button on a telephone down for a half second For example to flash On Hook after dialing the number 555 1234 in order to transfer to Extension 5678 you might enter ATDT5551234 15678 The commas cause a 4 second pause just to be safe Calling Card Detect Tones The modem has the capability to detect AT amp T calling card tones for the purpose of utilizing the
158. where Problems you may encounter include the following e None of the LEDs light when the modem is on e The modem does not respond to commands e The modem dials but is unable to make a connection e The modem disconnects while on line e The modem cannot connect when answering e File transfer is slower than it should be e lam losing data e am getting garbage characters on the monitor e can t run my fax and communications software at the same time If you experience problems please check the following possibilities before calling Tech Support None of the LEDs Light When the Modem Is On When you turn on the modem the LED indicators on the front panel should flash briefly as the modem runs a self test If the LEDs remain off the modem is probably not receiving power e Make sure the modem s power switch is on especially if you normally turn on the modem by turning on a power strip e fthe power supply is plugged into a power strip make sure the power strip is plugged in and its power switch is on e Make sure the power supply module is firmly connected to the modem and to the wall outlet or power strip e Ifthe power strip is on and the modem switch is on try moving the modem power supply to another outlet on the power strip e Test that the outlet is live by plugging a lamp into it e The modem or power supply may be defective If you have another Multi Tech modem try swapping modems If the problem goes away
159. y attempts by putting numbers that failed to connect on a special Delayed Number list Subsequent dialing of these numbers will be delayed time specified by a country regulation and an appropriate message displayed If the number is retried more than the maximum allowed number of times number is also specified by country regulation it is placed on the Forbidden Numbers list and no further retries will be allowed When the Forbidden Numbers list is full no dialing is allowed and a CFIFF indication is given The modem in AT command mode will respond with NO CARRIER If country regulations require that the Forbidden Numbers list be checked in AT mode then NO CARRIER will be the response to a dial attempt in AT mode Numbers will also be put on the Forbidden Numbers list if the Delayed Numbers list is full and a new number fails for the first time In that case the new number will be added to the Delayed Number list and the oldest existing number added to the Forbidden Numbers list Numbers are removed from the Forbidden Numbers list by after a certain time has past also by country regulation Some country regulations have numbers remain on the Forbidden Numbers list permanently The Delayed Number and Forbidden Numbers lists are eight numbers long 20 characters each V 25bis Operation Operation in V 25bis mode is similar to AT command mode in that certain DIP Switch functions are important to its operation V 25bis does not include any speed de

Multi-Tech Systems BA-Series User's Manual

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