Multitech MT2834BA Series User Manual
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Multitech MT2834BA Series User Manual

Mt2834ba/mt2834bl series intelligent data/fax modems
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  • Page 1 MT2834BA/MT2834BL Series Intelligent Data/Fax Modems 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 MT2834BA/BL Series Features ... 8 Fax Features ... 8 Technical Specifications ... 9 Power ... 10 Modem LED Indicators ... 11 Controls on PC Board ...
  • Page 4 Recording Option Configurations ... 84 Chapter 9 - Warranty, Service and Tech Support ... 86 Introduction ... 87 Multi-Tech Systems, Inc. Warranty & Repairs Policies ... 87 Online Warranty Registration ... 88 Replacement Parts ... 89 Technical Support ... 89 Internet Sites ...

  • Page 5: Chapter 1 - Introduction And Description

    Chapter 1 - Introduction and Description...

  • Page 6: Introduction

    We then go into a detailed explanation of each modem command, providing examples where applicable. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 1 - Introduction and Description BA/BL series modem, from Multi-...

  • Page 7: Modem Features

    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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 1 - Introduction and Description...

  • Page 8: Mt2834Ba/Bl Series Features

    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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 1 - Introduction and Description...

  • Page 9: Technical Specifications

    Speed Conversion Flow Control Options Mode of Operation Intelligent Features Command Buffer Modulation Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 1 - Introduction and Description MultiModem IITM MT2834BA, MT2834BAI, MT2834BL, MT2834BLI 33,600, 31,200, 28,800, 26,400, 24,000, 21,600, 19,200, 16,800,...

  • Page 10: Power

    A Power On/Off switch is located on the back of the modem. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 1 - Introduction and Description 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,...

  • Page 11: Modem Led Indicators

    (ERR) ERROR. When this LED is lit, either the leased line is down and the modem is in dial backup mode, or else the self-test has failed. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 1 - Introduction and Description Figure 1-1.

  • Page 12: Controls On Pc Board

    Chapter 8 provides detailed instruction for configuring the modem’s PC board. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 1 - Introduction and Description...

  • Page 13: Chapter 2 - Installation And Connection

    Chapter 2 - Installation and Connection...

  • Page 14: What Is In Your Modem Package

    Chapter 7. DIP-Switch Condition DOWN DOWN * Factory Default setting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 2 - Installation and Connection ( a data communications and fax Effect Selects Answer mode Selects Originate mode Selects Dial-Up operation...
  • Page 15 7. Apply power to the unit by setting the ON/OFF switch at the rear of the modem to the ON (Up) position. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 2 - Installation and Connection Figure 2-1. MultiModemBA Connections...

  • Page 16: Installing Phonetools, The Data Communications Software

    Chapters 5 and 6 of the User Guide for AT command and S-Register explanations and defaults. If you’re a novice, refer to Chapter 3 of the User Guide to learn about the basics of data communications. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 2 - Installation and Connection...

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

    Chapter 3 - Software Configuration and Modem Basics...

  • Page 18: Chapter 3 - Software Configuration

    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 &F X4 S0= 2 ^M Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 3 - Software Configuration...

  • Page 19: Changing Default Parameters

    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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 3 - Software Configuration...

  • Page 20: Modem Basics

    (DOWN); and if you are "Manually" answering (modem is not configured to automatically answer via S-Register S0 setup), the modem answers an incoming call when toggled in that position (UP). Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 3 - Software Configuration Chapter 4...

  • Page 21: Chapter 4 - Manual Dial And Automatic Answer

    Chapter 4 - Manual Dial and Automatic Answer...

  • Page 22: Introduction

    This is done by setting the value of S-Register S0 (modem defaults to automatically answer an incoming call after one ring). Refer to Chapter 6 for S-Register details. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 4 - Manual Dial and Automatic Answer...

  • Page 23: Automatic Leased Line Restoral Operation

    In the preparation for proper dial-back operation, enter the proper number in the N9 location using the commands detailed in Chapter 5. Keep in mind that the number also can be dialed in V.25bis Command mode. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 4 - Manual Dial and Automatic Answer...

  • Page 24: Dial-Up Operation

    Data switch on the modem's front panel downward. To force the modem to automatically answer calls, either type ATA, or press the Voice/Data switch on the modem's front panel upward. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 4 - Manual Dial and Automatic Answer...

  • Page 25: Automatic Answering

    Answer. This switches your modem to the originate on-line mode, and Bill's to the Answer on-line mode. You would both then hang up your telephone handsets, and continue the conversation via your keyboards. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 4 - Manual Dial and Automatic Answer...

  • Page 26: 4.10 Handshaking Details

    This timer runs in both normal or reliable connections and is controlled by S-Register S30. The Inactivity Timer can be disabled by setting S30 to 0, which is the factory default setting. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 4 - Manual Dial and Automatic Answer...

  • Page 27: Chapter 5 - Command Mode

    Chapter 5 - Command Mode...

  • Page 28: Introduction

    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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode...

  • Page 29: Summary Of At Commands

    A: or : Continuous Redial MODIFY DIALING PROCEDURES &P MEMORIZE PHONE NUMBERS D...N Store Phone Numbers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Figure 5-1. Functional Modes Dial DTR Dialing Voice/Data Dialing Dial a Stored Number Pulse/Tone Dialing Set Pulse Dial Ratios...
  • Page 30 &E6 &E7 &E8 &E9 &E10 &E11 &E12 &E13 &BS Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Load Factory Defaults Store Configuration & S-Register Parameters Reset Modem Result Code Terse/Verbose UNIX/"Spoofing” Synchronous/Asynchronous Mode Select Synchronous Transmit Clock Select Result Codes Enable/Disable Response...
  • Page 31 SECURITY #RCBNxx TEST MODEM &T LEASED-LINE HANDSHAKE (MT2834BL) Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Data Compression Disabled Data Compression Enabled Set modem speed (e.g.,$MB14400) Set serial port speed (e.g.,$SB57600) Help Product Code Inquiry Windows 95 Autodetect Inquiry (2834 Series only)

  • Page 32: Result Codes

    ERROR CONNECT 1200 NO DIALTONE BUSY NO ANSWER CONNECT 2400 *Reliable/Compression modifiers are not displayed with Standard AT Result Codes. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode TERSE VERBOSE CONNECT 4800 CONNECT 9600 CONNECT 14400...

  • Page 33: 5.4 Dialing Commands

    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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode...

  • Page 34: Dial Modifier Commands

    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. The factory default is &P0. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide...
  • Page 35 For example, to flash On Hook after dialing the number 555-1234 in order to transfer to Extension #5678, you might enter ATDT5551234,,!5678. The commas cause a 4 second pause (just to be safe). Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide...

  • Page 36: Quiet Answer

    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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide...

  • Page 37: Phone Number Memory Commands

    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&E1&E5&E13&E15DT16126313550 DT12138880123 Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode...

  • Page 38: Configuration And Default Storage Commands

    When an ATZ command is executed, the state of the &W command determines where the default values originate. &W0 defaults come from RAM and &W1 defaults come from ROM. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode Power-On and ATZ...
  • Page 39 Slave Clocking. The &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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide...

  • Page 40: Command Response (Result Code) Commands

    Entering ATV0 (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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide...
  • Page 41 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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode...

  • Page 42: Phone Line Conditioning Commands

    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#T0 turns Trellis coding off and AT#T1 turns Trellis coding on (factory default). Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide...
  • Page 43 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. AT#A0 is the factory default value. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode...

  • Page 44: Rs-232C Interface Control Commands

    To set up CTS so that it drops for one second on disconnect and then comes up again, enter the command AT&R2. (If you want the drop time to be something other than one second, use S- Register S24 to change this value). Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide...
  • Page 45 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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide...

  • Page 46: Error Correction Commands

    Flow control is discussed in Section 5.4.9. Reliable Mode &E2 In Reliable mode, the modem uses its V.42 error correction capabilities during all transmissions, and must be connected to another modem with a similar protocol activated (MNP or LAP-M). Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide...

  • Page 47: Auto-Reliable Buffering $A

    AT$A1 = Buffer data received during auto-reliable time period. The factory default is $A0. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide The #L0 Command allows a pair of modems to negotiate which V.42 mode (MNP or LAP-M) will be used in their transmissions.

  • Page 48: Retransmit Count $R

    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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode...

  • Page 49: Flow Control Commands

    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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide...

  • Page 50: Xon/Xoff Pass-Through &E7

    HP systems. Doing so does not affect any other flow control or pacing already configured in the modem. When 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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode...

  • Page 51: Terminal/Computer Initiated Pacing &E13

    AT#P0 = no parity AT#P1 = odd parity AT#P2 = even parity The factory default setting is AT#P2. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode...

  • Page 52: Compression, Error Correction, Flow Control, Pass-Through And Pacing Commands

    &E13 = Pacing on (either RTS on/off or Xon/Xoff depending on the setting of &E4 or &E5).* Data Compression Commands: &E14 = Data Compression disabled &E15 = Data Compression enabled* *Factory Default setting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode...

  • Page 53: Speed Conversion Commands

    AT$MB300 AT$MB1200 AT$MB2400 AT$MB4800 AT$MB9600 AT$MB14400 AT$MB19200 AT$MB28800 AT$MB33600 The factory default is 33600 bps. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide CCITT V.23 300 bps 1200 bps 2400 bps 4800 bps 9600 bps 14400 bps 19200 bps 28800 bps...

  • Page 54: Serial Port Baud Rate $Sb

    AT$SB2400 AT$SB4800 AT$SB9600 AT$SB19200 AT$SB38400 AT$SB57600 AT$SB115200 = The factory default is for 2834 is 57,600 bps. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 300 bps 1200 bps 2400 bps 4800 bps 9600 bps 19,200 bps 38,400 bps 57,600 bps...

  • Page 55: Immediate Action Commands

    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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode...
  • Page 56 %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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode...

  • Page 57: Line Probe Commands

    = This command initiates a retrain that makes the processor read Line Probe information. Valid only when on-line in V.34 mode. = Displays Signal Strength information. = Displays Signal to Noise Ratio information (SNR). = Displays noise information. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 5 - Command Mode...

  • Page 58: Chapter 6 - S-Registers

    Chapter 6 - S-Registers...

  • Page 59: Introduction

    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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 6 - S-Registers...
  • Page 60 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 Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 6 - S-Registers...
  • Page 61 (%%%). 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 Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 6 - S-Registers...
  • Page 62 S19 is a timer that begins when the lease line goes down. S19 specifies the duration of time the modem attempts to reestablish the lease line connection. * Value for International and DOC units ** Value for International units only Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 6 - S-Registers...
  • Page 63 #DB1 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). Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 6 - S-Registers...
  • Page 64 1 Second Range: 0-255 seconds Default: 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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 6 - S-Registers...
  • Page 65 Enhanced V.34 speeds (e.g., 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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 6 - S-Registers...

  • Page 66: Reading And Assigning S-Register Values

    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?, ATS0=30S3?, and ATS7=55S7?. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 6 - S-Registers...

  • Page 67: At Command And S-Register Summary

    ROM. Before using the &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-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 6 - S-Registers...

  • Page 68: Chapter 7 - Callback Security And Remote Configuration

    Chapter 7 - Callback Security and Remote Configuration...

  • Page 69: Introduction

    Your modem will also remember if the incoming call was reliable or not, and make the call back accordingly. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 7 - Callback Security and Remote Configuration...

  • Page 70: Remote Configuration Description

    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 (% sign) will be your modem’s remote escape character. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 7 - Callback Security and Remote Configuration...
  • Page 71 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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 7 - Callback Security and Remote Configuration...
  • Page 72 4. Enter the modem's LOGIN Password again (the same as in Step 1). The Callback modem responds with: CONNECT You are now in Data Mode. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 7 - Callback Security and Remote Configuration...

  • Page 73: Remote Configuration Procedures

    2. COMMAND Mode 5. Enter a 1 to go back on-line with your computer, or enter 2 and the correct password to talk to your modem. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 7 - Callback Security and Remote Configuration...

  • Page 74: Remote Configuration And Callback Security At Commands

    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). Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 7 - Callback Security and Remote Configuration #RCBNxx...

  • Page 75: Remote Configuration/Callback Security S-Registers

    (i.e., no AT commands can be sent until the LOGIN and SETUP passwords have been entered). Units: Minutes Range: 1-255 Default: Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 7 - Callback Security and Remote Configuration...

  • Page 76: Chapter 8 - Dip-Switch Settings

    Chapter 8 - DIP-Switch Settings...

  • Page 77: Introduction

    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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Figure 8-1. MT2834BA PC Board Figure 8-2. MT2834BL PC Board...

  • Page 78: Dip-Switch Option Settings

    #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 (Q0) Suppress Responses: Answer (Q2) Factory Default Setting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Switch #1 UP Switch #1 DOWN Switch #2 UP Switch #2 DOWN...
  • Page 79 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 Auto-Answer Disabled (Factory Default Setting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Switch #3 DOWN Switch #3 UP DOWN Switch #4 DOWN...
  • Page 80 RTS is forced On (DIP-Switch #7 DOWN) RTS functions Normally RTS forced On Factory Default Setting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Switch #5 DOWN Switch #5 UP Switch #6 UP...
  • Page 81 (Switch #11 in the UP position). The &Q command performs the same function (choosing AT or Multi-Tech Result Codes), and is explained further in "AT" Responses (&Q1) "Multi-Tech" Responses (&Q0 = Factory Default Setting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Switch #8 UP Switch #8 DOWN DOWN Switch #9 UP...
  • Page 82 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 CD and DSR forced On Factory Default Setting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Switch #11 UP Switch #11 DOWN DOWN Switch #12 UP...

  • Page 83: Speaker Volume Control

    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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Switch #16 UP Switch #16 DOWN...

  • Page 84: Recording Option Configurations

    (Async/Sync/Dial/Leased) Dial-Up*/Leased-Line "AT"/"Multi-Tech" Result Codes* (Asynchronous) Internal Clocking*/External Clocking (Synchronous) Sync/Async Mode* * Factory Default Setting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Position Effect DTR Dependent on Interface DOWN DTR Forced On at All Times Hardware Flow Control DOWN...
  • Page 85 CONDITION DOWN DOWN* DIP Switches #15-16 (MT2834BL) DOWN DOWN* *Standard Factory Default Setting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide EFFECT 28.8 K bps Operation 19.2 K bps Operation 14.4 K bps Operation 9600 bps Operation EFFECT CD/DSR from Interface...

  • Page 86: Chapter 9 - Warranty, Service And Tech Support

    Chapter 9 - Warranty, Service and Tech Support...

  • Page 87: Chapter 9 - Warranty, Service, And Technical Support

    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 88: Repair Procedures For International Customers (Outside U.s.a. And Canada)

    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:// www.multitech.com/register/. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 9 - Warranty, Service, and Technical Support...

  • Page 89: 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 90: Appendixes

    Appendixes...

  • Page 91: Appendix A - Upgrading Your Modem's Firmware

    2. Scroll down to your modem model number. 3. Look at the firmware version number for your modem. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix A - Upgrading Your Modem’s Firmware . If the modem does not respond with OK, NTER , and record your results.

  • Page 92: Step 3: Download The Upgrade File

    2. In the program’s terminal window, type AT&V and press E parameters. 3. Record your parameters by saving the screens and sending them to your printer. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix A - Upgrading Your Modem’s Firmware to list your modem’s current...

  • Page 93: Step 6: Upgrade The Modem's Firmware

    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 E Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix A - Upgrading Your Modem’s Firmware...

  • Page 94: Appendix B - Troubleshooting

    Try resetting your modem by turning it off and on. Make sure there is a reset command (&F) in your initialization string, or your modem may not initialize correctly. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix B - Troubleshooting...
  • Page 95 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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix B - Troubleshooting...

  • Page 96: The Modem Dials But Cannot Make A Connection

    Try connecting at a lower speed. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix B - Troubleshooting...
  • Page 97 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.). Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix B - Troubleshooting...
  • Page 98 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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix B - Troubleshooting...

  • Page 99: Appendix C - At Command Summary

    = 0,1,2,4 &CDn n = 0 or 1 s = phone # *Factory Default Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix C - AT Command Summary Description Attention Code that precedes most command strings except A/, A: and Escape Codes.
  • Page 100 = 0 or 1 n=0 thru 5 n = 0 thru 2 *Factory Default Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix C - AT Command Summary Description Store telephone number. To store, phone d = 0 thru 9 number ”s“ is entered and followed by N and then Directory Number “d.”...
  • Page 101 $LLn n=0 or 1 n = 0 thru 3 *Factory Default Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix C - AT Command Summary &F loads factory default values from ROM. &F8 reads factory default values and switch settings when &F is issued.
  • Page 102 = 0-11, 13, 15-19, 24-26, 30, 32 or 34... *Factory Default Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix C - AT Command Summary $MB75 selects CCITT V.23 mode. $MB300 selects 300 bps on-line. $MB1200 selects 1200 bps on-line.
  • Page 103 = 0 or 1 &Wn n = 0 or 1 *Factory Default Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix C - AT Command Summary $SB300 selects 300 bps at serial port. $SB1200 selects 1200 bps at serial port.
  • Page 104 In Dial Command In Dial Command +++AT<CR> BREAK AT<CR> * Factory Default Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix C - AT Command Summary X0 selects Basic Result Codes (w/o CONNECT 1200, CONNECT 2400). X1 selects Extended Result Codes (w/CONNECT 1200, CONNECT 2400).
  • Page 105 #DBn #CBNyyxxxxxx + - Dxxxxxx???Nxx #RCBNxx #RDNxx Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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 106: 25Bis Commands

    Command CSPs CRNdd CRIdd;nn DIC or CIC Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix C - AT Command Summary 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.

  • Page 107: Appendix D - V.25Bis Operation

    If the $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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix D - V.25bis Operation...
  • Page 108 Not Allowed Not Allowed Not Allowed Not Allowed Alters Operation (X0 no connect message, X1 connect message) Not Allowed Not Allowed Not Allowed Not Allowed +++AT<CR> Not Allowed Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix D - V.25bis Operation...
  • Page 109 1200 1200 bps 2400 2400 bps 4800 4800 bps 9600 9600 bps 19200 = 19200 bps 38400 = 38400 bps 57600 = 57600 bps 115200 = 115200 bps Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix D - V.25bis Operation...
  • Page 110 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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide...
  • Page 111 If dialing is not possible then No Carrier is the response. Auto-Answer mode behavior Auto-Answer in 5 seconds if no DIC Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Z - U, D, or F, for Unrestricted, Delayed or Forbidden P - Delay time if delayed...
  • Page 112 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. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix D - V.25bis Operation...

  • Page 113: Appendix E - Multimodemba/Bl Cables

    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 Figure E-3. Four-Wire Leased Line Connection Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide...

  • Page 114: Appendix F - Regulatory Information

    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 115: Canadian Limitations Notice

    Warning Notice: No ‘111’ or other calls can be made from this device during a mains power failure. This equipment may not provide for the effective hand-over of a call to another device connected to the same line. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix F - Regulatory Information...

  • Page 116: South African Notice

    For correct operation, total of the RN’s of all devices connected to a single line at any time should not exceed 5. South African Notice This modem must be used in conjunction with an approved surge protection device. Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix F - Regulatory Information...

  • Page 117: Waste Electrical And Electronic Equipment

    For more information about where you can drop off your waste equipment for recycling, please contact your local city office, your household waste disposal service or where you purchased the product. July, 2005 Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide...

  • Page 118: Index

    Carrier Loss Disconnect Delay Time ... 61 Change LOGIN Password (#I) ... 74 Change Serial Baud Rate (CSP) Command ... 109 Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Change SETUP Password (#S) ... 74 Changing Break Time ... 62 Cleardown at Disconnect ... 43 COM ports COM2 ...
  • Page 119 Line Probe ... 57 Intelligent Features ... 9 Internal/External Clocking ... 82 Internet addresses ... 89 Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Leased Line/Dial-Up Operation ... 81 Limited Warranty ... 10 Line Feed Character ... 60 “Link Request” ... 46 Listing Current Operating Parameters (L5 L7) ..
  • Page 120 South African Notice ... 116 Speaker ... 10 Speed Conversion ($BA) ... 53 Speed Switches ... 82 Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Storing Phone Numbers (D...N) ... 37 Summary ... 67 Synchronous Transmit Clock Select (&X) ... 39 Telephone line ...

This manual is also suitable for:

Multimodem ii mt2834blMultimodem ii mt2834baMultimodem ii mt2834baiMultimodem ii mt2834bli

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