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MT2834ZDX-Series
External Data/Fax Modem
User's Guide
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User Guide MT2834ZDX-Series S000309A Rev. A Copyright 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 © 2003 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. re
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Table of Contents Contents Chapter 1 – Introduction and Installation.................................................................................................4 Getting Started...........................................................................................................................................4 Safety Warnings.........................................................................................................................................4 We Supply..............
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Chapter 1 – Introduction and Installation Chapter 1 – Introduction and Installation Getting Started This guide shows you step-by-step how to set up your Multi-Tech MT2834ZDX–Series modem. For detailed information on how to install, test, and use your modem, see the User Guide, located on the MT2834ZDX system CD provided with your modem. Safety Warnings Use this product only with UL- and CUL-listed computers (US). Never install phone wiring during a lightning storm. Never install a phone ja
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Chapter 1 – Introduction and Installation Modem Installation Step 1: Attach the Self-Adhesive Feet The modem comes with a set of self-adhesive plastic feet, which you can optionally attach to the modem. To install, simply peel them from their paper strip and press them into the recesses on the bottom of the modem. Step 2: Connect the Modem to Your System Turn off your computer. Place the modem in a convenient location, and then connect it to your computer’s serial port, the phone line, AC power,
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Chapter 1 – Introduction and Installation Step 3: Install the Modem Driver If you use Windows 98+, you must install the modem driver, which is installed using the Windows Plug and Play feature. Follow the four-step procedure below. If you use another operating system, see the Appendix. 1. Make sure your modem is connected properly, and then turn on your computer. Windows should detect your new modem and open the Install New Modem wizard. 2. Insert the system CD, and then click OK. 3. Windows in
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Chapter 2 – Operation Chapter 2 – Operation Front Panel The MT2834ZDX has ten LED indicators on the front panel that indicate status, configuration, and activity: Transmit Data. The TD LED lights when the modem is transmitting data to another modem. The state of the LED matches the TD circuit on pin 2 of the RS-232C/V.24 interface. Receive Data. The RD LED lights when the modem is receiving data from another modem. The state of the LED matches that of the RD circuit on pin 3 of the RS-232C/V.24
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Chapter 3 – AT Commands, S-Registers, and Results Codes Chapter 3 – AT Commands, S-Registers and Result Codes AT Commands This section summarizes the AT commands for this modem. Command: AT Attention Code Values: n/a Description: The attention code precedes all command lines except A/, A:, and escape codes. Command: RETURN Key Values: n/a Description: Press the RETURN (ENTER) key to execute most commands. Command: A Force Answer Mode Values: n/a Description: Answer call before final ring.
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Chapter 3 – AT Commands, S-Registers, and Results Codes Command: $BAn Baud Adjust Values: n = 0 or 1 Default: 0 Description: $BA0 Set baud adjust off, speed conversion on. (Serial port speed is independent of modem data rate.) $BA1 Set baud adjust on, speed conversion off. (Serial port speed is same as modem data rate.) Command: &Cn Carrier Detect Control Values: n = 0, 1, 2, or 4 Default: 1 Description: &C0 Force Carrier Detect high. &C1 Let Carrier Detect follow carrier signal. &C2 Let C
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Chapter 3 – AT Commands, S-Registers, and Results Codes Command: %DPn Read Line Probe Data Values: n = 0 or 1 Default: 0 Description: %DP0 Do not read and store line probe information from DSP during handshake. %DP1 Read and store line probe information from DSP during handshake. Command: >DTn DTMF Detection Values: n = 0 or 1 Default: 0 Description: >DT0 The modem will not detect DTMF tones. >DT1 The modem will detect and report DTMF tones when it is off-hook. Command: En Echo Command
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Chapter 3 – AT Commands, S-Registers, and Results Codes Command: $En V.42 Error Correction at 300 bps Values: n = 0 or 1 Default: 0 Description: $E0 V.42 error correction at 300 bps disabled. $E1 V.42 error correction at 300 bps enabled. Command: $EBn Asynchronous Word Length Values: n = 0 or 1 Default: 0 Description: $EB0 10-bit mode enabled. $EB1 11-bit mode enabled. Command: %En Escape Sequence Options Values: n = 0–5 Defaults: 1 and 4 Description: %E0 Modem won’t escape. %E1 +++AT<
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Chapter 3 – AT Commands, S-Registers, and Results Codes Command: $Hn Help Screens Values: n = 1, 2, or 3 Default: None Description: $H1 Display Help Screen #1. $H2 Display Help Screen #2. $H3 Display Help Screen #3. Command: In Inquire Product Codes Values: n = 0, 1, or 2 Default: None Description: I0 Display modem ID number. I1 Display firmware version number. I2 Display modem description. Command: $Jn Display Parity Bit Values: n = 0, 1 Default: 0 Description: The $J command allows the
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Chapter 3 – AT Commands, S-Registers, and Results Codes Command: $MBn Modem Baud Rate Values: n = speed Default: 28800 (ZDX) or 33600 (ZDXb) Description: $MB300 Originate call at 300 bps. $MB1200 Originate call at 1200 bps. $MB2400 Originate call at 2400 bps. $MB4800 Originate call at 4800 bps. $MB7200 Originate call at 7200 bps. $MB9600 Originate call at 9600 bps. $MB14400 Originate call at 14,400 bps. $MB16800 Originate call at 16, 800 bps. $MB19200 Originate call at 19,200 bps. $MB28800 Or
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Chapter 3 – AT Commands, S-Registers, and Results Codes Command: &Rn Clear to Send Control Values: n = 0, 1, or 2 Default: 1 Description: &R0 Let CTS state follow RTS state when on line. &R1 Force CTS high (on). &R2 Let CTS drop on disconnect for time set by S24, then go high again. Command: &RAn Asymmetrical Bit Rate Values: n = 0 or 1 Default: 0 Description: &RA0 Enable asymmetrical bit rate in V.34 mode. &RA1 Disable asymmetrical bit rate in V.34 mode. Command: &RDn Square Wave Ring
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Chapter 3 – AT Commands, S-Registers, and Results Codes Command: &SFn DSR/CD Interaction Control Values: n = 0 or 1 Default: 0 Description: &SF0 Select DSR to follow CD. &SF1 Select DSR to be independent. Command: $SBn Serial Port Baud Rate Values: n = speed Default: 57600 Description: $SB300 Set serial port to 300 bps. $SB1200 Set serial port to 1200 bps. $SB2400 Set serial port to 2400 bps. $SB4800 Set serial port to 4800 bps. $SB9600 Set serial port to 9600 bps. $SB19200 Set serial por
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Chapter 3 – AT Commands, S-Registers, and Results Codes Command: &Wn Store Configuration Values: n = 0 or 1 Default: 1 Description: &W0 Store current settings in NVRAM; load them at power-on or following the ATZ command instead of loading the factory defaults from ROM. W1 Clear user default settings from NVRAM. Command: Xn Result Codes and Call Progress Selection Values: n = 0–4 Default: 0 Description: X0 Basic result codes ( CONNECT only); does not look for dial tone or busy signal. X1 Ex
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Chapter 3 – AT Commands, S-Registers, and Results Codes Command: %%%AT Remote Configuration Escape Sequence Values: n/a Description: Initiates remote configuration mode while online with remote modem. The remote configuration escape character (%) is defined in register S13. Command: +++AT Escape Code Values: n/a Description: Puts modem in command mode (and optionally issues a command) while remaining on line. Enter +++AT, up to ten command characters (or as defined by S34), and a
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Chapter 3 – AT Commands, S-Registers, and Results Codes S-Registers Certain modem values, or parameters, are stored in memory locations called S-registers. Use the S command to read or to alter the contents of S-Registers (see previous section). Register Unit Range Default Description Register Unit Range Default Description S0 1 ring 0, 1–255 1 Sets the number of rings until the modem answers. ATS0=0 disables autoanswer completely. S1 1 ring 0–255 0 Counts the rings that have occurred. S2 decima
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Chapter 3 – AT Commands, S-Registers, and Results Codes Result Codes In command mode the MT2834ZDX can send responses, or result codes, to your computer. Result codes are used by communications programs and can also appear on your monitor. AT&Q0 selects Multi-Tech result codes with RELIABLE, LAPM, and COMPRESSED modifiers (default). AT&Q1 selects standard AT result codes without modifiers. &Q0 Multi-Tech Result Codes &Q1 Standard Result Codes Description Terse Verbose Terse Verbose 0 OK 0 OK Com
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Chapter 4 – Troubleshooting Chapter 4 – Troubleshooting Your MultiModemZDX 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 elsewhere. The following symptoms are typical of problems you may encounter: None of the LEDs light when the modem is on.
