Multitech BA-Series User Manual
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Multitech BA-Series User Manual

Ba-series intelligent data/fax modem
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BA-Series
Intelligent Data/Fax Modem
User Guide

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  • Page 1 BA-Series Intelligent Data/Fax Modem User Guide...
  • Page 2 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.

  • Page 3: Table Of Contents

    Chapter 1 - Introduction and Description ... 5 Introduction ... 6 How To Use This Manual ... 6 Modem Features ... 7 1.3.1 2834 Series Features ... 8 Fax Features ... 8 Technical Specifications ... 9 Power ... 10 Modem LED Indicators ... 11 Controls on PC Board ...
  • Page 4 Recording Option Configurations ... 72 Chapter 8 - Warranty, Service and Tech Support ... 74 Introduction ... 75 Multi-Tech Systems, Inc. Warranty & Repairs Policies ... 75 Online Warranty Registration ... 76 Replacement Parts ... 77 Technical Support ... 77 Internet Sites ...

  • Page 5: Chapter 1 - Introduction And Description

    Chapter 1 - Introduction and Description...

  • Page 6: Introduction

    MultiModemBA User Guide Introduction Welcome to the world of data communications. You have acquired one of the finest intelligent desktop data/fax modems available today, the MultiModem Systems. This User Guide covers various models within the BA series, and unless otherwise noted, all content should be considered relevant to all models.

  • Page 7: Modem Features

    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.

  • Page 8: 2834 Series Features

    MultiModemBA User Guide 1.3.1 2834 Series Features Your MT2834BA modem meets the proposed Enhanced V.34 ITU standard for data signalling rates 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;...

  • Page 9: Technical Specifications

    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 Mode of Operation Intelligent Features Command Buffer Modulation Chapter 1 - Introduction and Description MultiModem IITM MT2834BA, MT2834BAI...

  • Page 10: Power

    MultiModemBA User Guide Fax Modulations Transmit Level Frequency Stability Connectors Diagnostics Indicators Controls Speaker Operating Temperature Power Requirements Dimensions Weight Limited Warranty Power 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).

  • Page 11: Modem Led Indicators

    Modem LED Indicators The MultiModem diagnostic LED indicators are shown in Figures 1-1 (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.

  • Page 12: Controls On Pc Board

    MultiModemBA User Guide 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.

  • Page 13: Chapter 2 - Installation And Connection

    Chapter 2 - Installation and Connection...

  • Page 14: What Is In Your Modem Package

    MultiModemBA User Guide 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. Your package should include: • MT2834BA data/fax modem • RJ-11 telephone cord •...

  • Page 15: Safety Warnings

    2.2.1 Safety Warnings 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.

  • Page 16: Installing Data Communications Software

    MultiModemBA User Guide Connect the 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. Figure 2-2. MultiModemBA/BAI Connections 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).

  • Page 17: Chapter 3 - Software Configuration And Modem Basics

    Chapter 3 - Software Configuration and Modem Basics...

  • Page 18: Introduction

    MultiModemBA User Guide 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 to identify them.

  • Page 19: Changing Default Parameters

    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.

  • Page 20: Terminal Emulation

    MultiModemBA User Guide 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 .

  • Page 21: Chapter 4 - Command Mode

    Chapter 4 - Command Mode...

  • Page 22: Introduction

    MultiModemBA User Guide Introduction AT commands are the means by which you, and your communications software, 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.

  • Page 23: Summary Of At Commands

    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.
  • Page 24 MultiModemBA User Guide STORE MODEM &F CONFIGURATIONS &W AND DEFAULTS &M &X CONFIGURE COMMAND &Q RESPONSES CONDITION &G PHONE LINE &T &CD CONTROL RS232C &C INTERFACE &D &R &S &RF &SF CONFIGURE &E0 ERROR &E1 CORRECTION &E2 CONFIGURE &E3 FLOW CONTROL &E4 &E5 &E6...
  • Page 25 CONFIGURE DATA &E14 Data Compression Disabled COMPRESSION &E15 Data Compression Enabled CONFIGURE SPEED $BA0 Speed Conversion On CONVERSION $BA1 Speed Conversion Off Set modem speed (e.g.,$MB14400) Set serial port speed (e.g.,$SB57600) EXECUTE Help IMMEDIATE Product Code Inquiry ACTION Windows 95 Autodetect Inquiry (2834 Series only) COMMANDS List Current Operating Parameters List S-Register Values...

  • Page 26: Result Codes

    MultiModemBA User Guide 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"...

  • Page 27: Dialing Commands

    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.

  • Page 28: Dial Modifier Commands

    MultiModemBA User Guide 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.
  • Page 29 Chapter 4 - Command Mode Set Pulse Dial Ratios &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&P0. To set a ratio of 67 mSec to 33 mSec, enter AT&P1 .

  • Page 30: Phone Number Memory Commands

    MultiModemBA User Guide 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.

  • Page 31: Configuration And Default Storage Commands

    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 number. This is called “linking” . To link the number in N1 to the number N2, simply enter ATN1N2 and hit RETURN.
  • Page 32 MultiModemBA User Guide Loading Factory Defaults &F The &F command provides a choice between customized configuration settings in RAM and the factory default configuration settings in ROM. The &F8 and &F9 commands define the function of the &F command. The modem is shipped from the factory with a pre-configured set of command and S-Register default settings.

  • Page 33: Command Response (Result Code) Commands

    Chapter 4 - Command Mode &X0 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 &X1 command overrides DIP-Switch #11 and selects External clocking. If DIP-Switch #11 is UP (External clocking), you can not override Internal clocking.

  • Page 34: Phone Line Conditioning Commands

    MultiModemBA User Guide 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.
  • Page 35 Bell/V.21 Tone 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 that called it, which initiates the handshaking between the two modems.) At higher speeds there is no conflict, because all use CCITT frequencies.

  • Page 36: Rs-232C Interface Control Commands

    MultiModemBA User Guide Enable/Disable Lowspeed Fast Connect $FC Entering AT$FC0&W0<CR> sets up the data pump so that it will not transmit a 5 second 2100 Hz signal. Entering AT$FC0&W0<CR> allows the modem to transmit a 5 second 2100 Hz signal and is the factory default.
  • Page 37 Chapter 4 - Command Mode Data Terminal Ready Control &D Data Terminal Ready (DTR) on pin 20 of the 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"...

  • Page 38: Error Correction Commands

    MultiModemBA User Guide DSR/CD Interaction Control &SF In typical applications, Data Set Ready (DSR) follows Carrier Detect (CD). &SF0 enables DSR to follow CD, and is the factory default. &SF1 enables DSR to operate independent of CD. If this is your application, refer to the &S command for control of the Data Set Ready signal.
  • Page 39 #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.

  • Page 40: Flow Control Commands

    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.
  • Page 41 Hardware Flow Control &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.
  • Page 42 MultiModemBA User Guide 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.

  • Page 43: Compression, Error Correction, Flow Control, Pass-Through And Pacing Commands

    Parity Selection #P The #P command enables the setting of parity. AT#P0 selects no parity. AT#P1 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#P0 = no parity AT#P1 = odd parity AT#P2 = even parity...

  • Page 44: Speed Conversion Commands

    MultiModemBA User Guide 4.4.11 Speed Conversion Commands 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.
  • Page 45 Serial Port 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.

  • Page 46: Immediate Action Commands

    MultiModemBA User Guide 4.4.12 Immediate Action Commands 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.
  • Page 47 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 ATH0 or ATH (the default is 0 when no number is entered).

  • Page 48: Line Probe Commands

    MultiModemBA User Guide 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.

  • Page 49: Chapter 5 - S-Registers

    Chapter 5 - S-Registers...

  • Page 50: Introduction

    MultiModemBA User Guide 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”.
  • Page 51 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. 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.
  • Page 52 MultiModemBA User Guide Carrier Detect Response Time Unit: 100 mSec. Range: 1-255 Default: Description: 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).
  • Page 53 Callback Time Delay Unit: Seconds Range: 10-255 Default: Description: S15 defines the time delay between Callback attempts after initial passwords have been exchanged between modems. Callback Attempts Unit: 1 Attempt Range: 1-255 Default: Description: S16 defines the number of attempts allowed after initial passwords have been exchanged between modems.
  • Page 54 MultiModemBA User Guide Failed Password Attempts Unit: 1 failed attempt Range: 0-255 Default: Description: 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.

  • Page 55: Reading And Assigning S-Register Values

    Time Between DTR Inactive and Modem Off-Hook Unit: 1 Second Range: 0-255 seconds Default: 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.

  • Page 56: Examples Of Assigning Values

    MultiModemBA User Guide 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 command).

  • Page 57: Chapter 6 - Callback Security And Remote Configuration

    Chapter 6 - Callback Security and Remote Configuration...

  • Page 58: Introduction

    MultiModemBA User Guide Introduction This chapter describes how the MultiModem’s Callback and Remote Configuration 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.
  • Page 59 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.
  • Page 60 MultiModemBA User Guide Table 6-2. Callback Password and Dial Back Phone Number Entry Procedures Step Procedure 1. Enter your modem's LOGIN Password (as selected in Table 6-1) by entering the following: AT#Ixxxxxxxxxx<CR> (xxxxxxxxxx from Table 6-1) Enter your modem's Setup Password (as selected in Table 6-1) by entering the following: AT#Syyyyyyyyyy<CR>...

  • Page 61: Remote Configuration Procedures

    7. Enter your modem's LOGIN Password (as selected in Table 6-1) by entering: AT#Ixxxxxxxxxx<CR> (xxxxxxxxxx from Table 6-1) 8. Enter your modem's Setup Password (as selected in Table 6-1) by entering: AT#Syyyyyyyyyy<CR> (yyyyyyyyyy from Table 6-1) Table 6-3. Callback Operational Sequence Procedures Perform the following steps when dialing into a dialback modem: Step Procedure...

  • Page 62: Remote Configuration And Callback Security At Commands

    MultiModemBA User Guide 2. You then select 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: You can now use any AT commands of the modem being remotely configured as if they were being entered locally.

  • Page 63: Remote Configuration/Callback Security S-Registers

    Change SETUP Password The default SETUP password for your modem is "SMODEMSETUP" . If you choose to activate callback security, you should change the SETUP password using this command in the following format: AT#Stttttttttt<CR> (where tttttttttt is the current SETUP password). Your modem will respond with "OK"...
  • Page 64 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.

  • Page 65: Chapter 7 - Dip-Switch Settings

    Chapter 7 - DIP-Switch Settings...

  • Page 66: Introduction

    MultiModemBA User Guide 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.
  • Page 67 Switch #2 SDLC/BSC Option (Synchronous Mode/Leased Line/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...
  • Page 68 MultiModemBA User Guide 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.
  • Page 69 Switch #6 Slave Clocking (Synchronous Mode/Leased 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.
  • Page 70 MultiModemBA User Guide 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 Leased Line Operation...

  • Page 71: Speaker Volume Control

    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).

  • Page 72: Recording Option Configurations

    MultiModemBA User Guide 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 Force DTR/DTR from Interface* Flow Control &E4*/&E5 (Async/Dial-Up/Leased Line) SDLC*/BSC (Sync) Result Codes Enable*/Disable...
  • Page 73 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 #13/#14 UP/UP* #13/#14 DOWN/UP #13/#14 UP/DOWN #13/#14 DOWN/DOWN DIP Switches #15-16 SWITCH CONDITION DOWN DOWN* *Standard Factory Default Setting...

  • Page 74: Chapter 8 - Warranty, Service And Tech Support

    Chapter 8 - Warranty, Service and Tech Support...

  • Page 75: Introduction

    Multi-Tech Systems, Inc. Warranty & 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.

  • Page 76: Online Warranty Registration

    Repair Procedures for International Distributors Procedures for International Distributors of Multi-Tech products are on the distributor web site. http://www.multitech.com/PARTNERS/login/ Copyright ã 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://...

  • Page 77: Replacement Parts

    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.

  • Page 78: Appendixes

    Appendixes...

  • Page 79: 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.
  • Page 80 MultiModemBA User Guide 5. If the 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.
  • Page 81 Step 6: Upgrade the Modem’s Firmware 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.

  • Page 82: Appendix B - Troubleshooting

    MultiModemBA User Guide Appendix B - Troubleshooting 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.
  • Page 83 • 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.
  • Page 84 MultiModemBA User Guide 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. •...
  • Page 85 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).
  • Page 86 MultiModemBA User Guide I 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.

  • Page 87: Apendix C - At Command Summary

    Apendix C - AT Command Summary Command Values RETURN $A n n = 0 or 1 #A n n = 0 thru 3 n = 0 or 1 &B n n = 0 or 1 &BS n n = 0 or 1 $BA n n = 0 or 1 &C n...
  • Page 88 MultiModemBA User Guide Command Values D s N d s = phone # &D n n = 0 thru 3 %DF n n = 0 or 1 %DP n n = 0 or 1 $D n n = 0 or 1 n = 0 or 1 &E n n = 0 thru 15...
  • Page 89 &F n n = 0, 8 or 9 $F n n = 0 or 1 &G n n = 0, 1 or 2 n = 0 or 1 $H n n = 1 thru 3 n = 0,1or 2 Read Only L11 ( #L n n = 0 thru 3...
  • Page 90 MultiModemBA User Guide $MB n n = speed &M n n = 0 or 1 d = 0 thru 9 N d N e d = 0 thru 9 e = any other number 0 thru 9 &P n n = 0 or 1 n = 0, 1 or 2 &Q n n = 0 or 1...
  • Page 91 $SB n n = speed &SF n n = 0 or 1 &S n n = 0, 1 or 2 $SPn n = 0 or 1 &T n n = 4 or 5 #T n n = 0 or 1 n = 0, 1, 2, or 3 $VD n n= 0 or 1...
  • Page 92 MultiModemBA User Guide n = 0,1,2,3 or 4 n= 0 or 1 n = 0 or 1 In Dial Command In Dial Command In Dial Command In Dial Command +++AT<CR> BREAK AT<CR> * Factory Default Setting X0 selects Basic Result Codes (w/o CONNECT 1200, CONNECT 2400).
  • Page 93 Callback Security/Remote Configuration Command Summary Command #DBn #CBNyyxxxxxx + - Dxxxxxx???Nxx #RCBNxx #RDNxx Appendix C - AT Command Summary Description #DB0 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.
  • Page 94 MultiModemBA User Guide 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.
  • Page 95 V.25bis Commands Command CSPs CRNdd CRIdd;nn DIC or CIC Appendix C - AT Command Summary Description $V0 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.

  • Page 96: Appendix D - V.25Bis Operation

    MultiModemBA User Guide Appendix D - V.25bis Operation 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.
  • Page 97 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: Enable speed conversion and have flow control on, or Enable connect responses (with the ATX1 command) and change the serial baud rate after receiving a connect message.
  • Page 98 MultiModemBA User Guide V.25bis Responses (Result Codes) When in V.25 bis mode (the AT$V1 command executed), your modem provides you with several responses which can help you follow the progress of V.25 bis operations. These are similar to the Result Codes associated with AT Command mode operation. The V.25 bis responses are in the form of three-character mnemonics as listed below: Incoming Call (same as RING indicator) A valid V.25 bis command has been attempted...
  • Page 99 Appendix D - V.25bis Operation Dial Phone Number Provided (CRN) Command The CRN command permits the dialing of the phone number immediately following it (from the command line). It is similar to the D command of the AT command set, except that the number is first checked against the Delayed Number and Forbidden Number list.
  • Page 100 MultiModemBA User Guide DTR Dialing ($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 it is connected via pin 20 of the RS-232 interface.
  • Page 101 Austria Command/Indication modification (none) Delayed and Forbidden list behavior No delay between retries After 2 retries to numbers that answer, but give no answer tone ( CFINT ), the number is put on the forbidden list After 10 retries with busy or no dialtone, the number is put on the forbidden list The number remains on the forbidden list forever Delayed and Forbidden Numbers lists are checked when dialing in AT mode.

  • Page 102: Appendix E - Multimodemba Cables

    MultiModemBA User Guide Appendix E - MultiModemBA Cables These cables connect your modem to your terminal or computer’s serial port. Figure E-1. RS232 Cable (IBM PC) Figure E-2. Two Wire Leased Line Connection...

  • Page 103: 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.

  • Page 104: Canadian Limitations Notice

    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. 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.

  • Page 105: International Modem Restrictions

    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.

  • Page 106: Index

    MultiModemBA User Guide Index Abort Timer ... 51 Answer Mode ... 39 AS/400 Mode ... 67 ASCII code ... 18 Asynchronous Word Lenth Selection ($EB) ... 43 Asynchronous/Synchronous Operation ... 70 AT ... 18 AT Command and S-Register Summary ... 56 AT Commands ...
  • Page 107 Escape Code Character ... 50 Escape Sequence Options (%E) ... 47 Escape Sequences (+++AT<CR>) ... 47 Examples of Assigning Values ... 56 Examples of Reading Values ... 56 Exiting Command Mode, Going Back On-Line (O)48 Extended Result Codes ... 34 Failed Password Attempts ...
  • Page 108 MultiModemBA User Guide Pause Time for Comma ... 51 PBX/CBX Disconnect Drop Time for DSR/CTS/CD53 PBX/CBX systems ... 53 Power ... 10 Power supply ... 82 Program V.34bis Connect Speeds ... 55 Program V34 Connect Speeds... 55 Protocols ... 20, 85 Pulse or Tone Dial (P T) ...
  • Page 109 Index Ymodem/G ... 85 Zmodem ... 85...

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