Instruction/ maintenance manual of the product MT2834BA Multi-Tech Systems
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MT2834BA/MT2834BL Series Intelligent Data/Fax Modems User Guide.
User Guide S000300B Revision B MultiModem II Models: MT2834BA, MT2834BAI, MT2834BL, MT2834BLI 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 2004©, by Multi-Tech Systems, Inc.
Contents Chapter 1 - Introduction and Description ......................................................................... 5 1.1 Introduction ............................................................................................................
5.4.1 Dialing Action Commands ................................................................................................... ...... 33 5.4.2 Dial Modifier Commands ..................................................................................
Chapter 1 - Introduction and Description.
Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 6 1.1 Introduction Welcome to the world of data communications. You have acquired one of the finest intelligent desktop data/fax modems available today, the MultiModem II BA/BL series modem, from Multi- Tech Systems.
Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 7 Chapter 6 - S-Registers Chapter 6 covers the modem's S-Registers, which enable the user to establish, read, and modify various modem options.
Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 8 1.3.1 MT2834BA/BL Series Features Your MT2834BA/BL 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.
Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 9 1.5 T echnical Specifications Your data/fax modem meets the specifications listed below: Tradename Mul.
Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 10 Fax Modulations V.21CH2 FSK at 300 bps, V.27ter DPSK at 4800 and 2400 bps, V.
Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 11 1.7 Modem LED Indicators The MultiModem diagnostic LED indicators are shown in Figure 1-1 and Figure 1-2. FX EC TR OH 24 96 14.4 19.2 24.0 28.8 CD RD SD MT2834BA Series Intelligent Modem V oice/ Data Answ Orig Fax V .
Chapter 1 - Introduction and Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 12 1.8 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).
Chapter 2 - Installation and Connection.
Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 2 - Installation and Connection 14 2.1 What Is in Y our Modem Package? Your MultiModem is made up of many components.
Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 2 - Installation and Connection 15 2. Verify that the ON/OFF switch at the rear of the modem to the OFF (Down) position.
Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Chapter 2 - Installation and Connection 16 2.3 Installing PhoneT ools, the 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.
Chapter 3 - Software Configuration and Modem Basics.
18 Chapter 3 - Software Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 3.1 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.
19 Chapter 3 - Software Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 3.3.1 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.
20 Chapter 3 - Software Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 3.5 Modem Basics You control your modem by issuing AT commands, setting S-Registers, and setting DIP-Switches. You can easily change the settings of your DIP-Switches, as they are located on the right side of your modem’s chassis.
Chapter 4 - Manual Dial and Automatic Answer.
22 Chapter 4 - Manual Dial and Automatic Answer Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 4.1 Introduction We’ll assume that yours is the very common application, where you are using a modem to dial up a remote computer.
23 Chapter 4 - Manual Dial and Automatic Answer Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 4.3 Automatic Leased Line Restoral Operation When the modem is in Dial Backup mode, it periodically checks the leased line to see if it's operational and tries to restore the leased line if possible.
24 Chapter 4 - Manual Dial and Automatic Answer Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 4.6 Dial-Up Operation When your modem is used as a dial-up modem (DIP-Switch #10 in the UP position), it can both originate and answer calls. To originate calls, you use the automatic dialing capability of the modem's Command mode.
25 Chapter 4 - Manual Dial and Automatic Answer Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 4.8 Automatic Answering The modem can be used as an automatic answering modem. No special modifications or settings are required other than making sure that the Auto-Answer select switch is set to Auto-answer enabled (DIP-Switch #5 UP).
26 Chapter 4 - Manual Dial and Automatic Answer Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 4.10 Handshaking Details This section briefly explains what happens between two modems in a normal call. We are assuming that there are MultiModems at both the originating and at the answering end of the telephone line.
Chapter 5 - Command Mode.
28 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.1 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.
29 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Dial ( D or A ) command, or incoming phone call Carrier detected HANG UP ON-LINE MODE W AIT FOR CARRIER COMMAND MODE AT 0 Command +++A T No carrier detected Carrier lost Figure 5-1.
30 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide STORE MODEM &F Load Factory Defaults CONFIGURATIONS &W Store Configuration & S-Register AND DEFAULTS Para.
31 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide CONFIGURE DATA &E14 Data Compression Disabled COMPRESSION &E15 Data Compression Enabled CONFIGURE SPEED $BA0 Speed Conversion On CONVERSION $BA1 Speed Conversion Off $MB Set modem speed (e.
32 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.3 Result Codes The Command mode provides you with several responses, or “Result Codes” , that can aid you in Command mode operation. These Result Codes are displayed on your monitor.
33 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4 Dialing Commands 5.4.1 Dialing Action Commands Dial Command D The letter D in a command causes the modem to dial the telephone number immediately following it. For example, if you enter ATD5551212 and hit RETURN, the modem dials the number 555-1212.
34 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide To activate DTR Dialing, enter AT$D1 and hit RETURN. The modem dials the phone number stored in the N0 location of memory when it receives a high DTR signal. DTR must remain high for the duration of the call, until disconnect.
35 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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.
36 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide "Calling Card" Detect Tones $ The modem has the capability to detect AT&T "calling card" tones for the purpose of utilizing the user's calling card number to originate an on-line connection.
37 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.3 Phone Number Memory Commands Storing Phone Numbers D...N A telephone number and command line of up to sixty characters may be stored in the modem’s number memory.
38 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.4 Configuration and Default Storage Commands Store Configuration & S-Register Parameters in Non-Volatile Memory &W The modem can store configuration parameters and S-Register values in its nonvolatile read/write Random Access Memory (RAM) memory.
39 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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 is able to generate ACKs at the DTE interface.
40 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.5 Command Response (Result Code) Commands Echo Command Mode Characters E If the modem is connected to a full-dupl.
41 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series 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.
42 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.6 Phone Line Conditioning Commands Guard Tones (Not Used in BAI/BLI Models) &G The &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.
43 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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.
44 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.7 RS-232C Interface Control Commands Carrier Detect Control &C The &C command allows you to control the status of the Carrier Detect signal (CD-Pin 8) on the RS- 232C line.
45 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Data Set Ready Control &S The &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.
46 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.8 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.
47 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide V.42 Mode Select #L The V.42 standard implements both MNP Class 3 & 4 and LAP-M error correction methods. The V.42 Mode Select command (#L) selects which type of error correction (MNP or LAP-M) your modem uses for transmissions.
48 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Enable/Disable Auto Reliable Fallback Character $F In Auto-Reliable mode, the modem is given four seconds to establish a Reliable connection.
49 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.9 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.
50 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Xon/Xoff Pass-Through &E7 So far, you have had three choices to make regarding pacing: 1. You can set the modem to respond to Xon/Xoff pacing. 2. You can set the modem to respond to RTS pacing.
51 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Normal Mode Modem Flow Control On &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.
52 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.10 Compression, Error Correction, Flow Control, Pass- Through and Pacing Commands The modem has a variety of commands to control its error correction and data compression options.
53 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.1 1 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.
54 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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.
55 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5.4.12 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.
56 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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).
57 Chapter 5 - Command Mode Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Force Answer Mode A You can force the modem into Answer mode with the modem’s A command.
Chapter 6 - S-Registers.
59 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 6.1 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.
60 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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.
61 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide S9 Carrier Detect Response Time Unit: 100 mSec. Range: 1-255 Default: 6 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.
62 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide S15 Callback Time Delay Unit: Seconds Range: 10-255 Default: 20 Description: S15 defines the time delay between Callback attempts after initial passwords have been exchanged between modems.
63 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD Unit: 50 mSec. Range: 0-255 Default: 20 Description: 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.
64 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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.
65 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide S48 Program V.34bis Connect Speeds 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.
66 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 6.2 Reading and Assigning S-Register V alues 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 ( ? ), then hit RETURN.
67 Chapter 6 - S-Registers Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 6.3 A T 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.
Chapter 7 - Callback Security and Remote Configuration.
69 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 7.1 Introduction This chapter describes how the MultiModem’s Callback and Remote Configuration features operate.
70 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 7.3 Remote Configuration Description The Remote Configuration feature is a network management tool that allows you to configure modems remotely.
71 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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 AT#DB1 and hit RETURN.
72 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide The + and/or - characters entered before the phone number are optional.
73 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 7.3.2 Remote Configuration Procedures The procedures for using the Remote Configuration features are the same whether or not a call originates from the remote modem.
74 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 7.4 Remote Configuration and Callback Security A T Commands When you have callback security enabled for the modem, anyone trying to connect with the modem will be required to furnish a password.
75 Chapter 7 - Callback Security and Remote Configuration Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 7.5 Remote Configuration/Callback Security S-Registers The following S-Registers are used with Remote Configuration and Callback Security features.
Chapter 8 - DIP-Switch Settings.
77 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 8.1 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.
78 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 8.2 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.
79 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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.
80 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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.
81 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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.
82 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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.
83 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Switch #16 (MT2834BA Only) (Reserved for Future Use) Switch #16 (MT2834BL Only) 2 Wire/4 Wire Operation (Asynchronous/Synchronous Mode) The modem works over either 2-wire or 4-wire leased lines.
84 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 8.4 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.
85 Chapter 8 - Dip-Switch Settings Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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.
Chapter 9 - W arranty , Service and T ech Support.
87 Chapter 9 - Warranty, Service, and Technical Support Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 9.1 Introduction This chapter starts out with statements about your modem's warranty and repair procedures. The next sections cover online warranty registration, replacement parts, and technical support.
88 Chapter 9 - Warranty, Service, and Technical Support Multi-Tech Systems, Inc. MT2834BA/BL Series 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@multitech.
89 Chapter 9 - Warranty, Service, and Technical Support Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 9.4 Replacement Parts SupplyNet, Inc., can supply you with replacement power supplies, cables and connectors for selected Multi-Tech products.
Appendixes.
91 Appendix A - Upgrading Your Modem’s Firmware Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix A - Upgrading Y our Modem’ s Firmware Your modem is controlled by semi-permanent software, called firmware , which is stored in flash memory.
92 Appendix A - Upgrading Your Modem’s Firmware Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 4. If the firmware version number matches the firmware version number found in “Step 1: Identify the Modem Firmware,” you have the current firmware version and do not need to be update.
93 Appendix A - Upgrading Your Modem’s Firmware Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 4. Type AT&W1Z and press E NTER to clear your stored parameters and reset your modem to factory default. 5. Close the terminal program. Step 6: Upgrade the Modem’s Firmware Before you begin the following procedure, read the README.
94 Appendix B - Troubleshooting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix B - T roubleshooting Your modem was thoroughly tested at the factory before it was shipped.
95 Appendix B - Troubleshooting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide · 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.
96 Appendix B - Troubleshooting Multi-Tech Systems, Inc. MT2834BA/BL Series 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.
97 Appendix B - Troubleshooting Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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.
98 Appendix B - Troubleshooting Multi-Tech Systems, Inc. MT2834BA/BL Series 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.
99 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix C - A T Command Summary Command Values Description AT Attention Code that precedes most command strings except A/, A: and Escape Codes. RETURN Pressing RETURN key executes most commands.
100 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Command Values Description D s N d s = phone # Store telephone number. To store, phone d = 0 thru 9 number ”s“ is entered and followed by N and then Directory Number “d.
101 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide &F n n = 0, 8 or 9 &F loads factory default values from ROM. * &F8 reads factory default values and switch settings when &F is issued. &F9 reads parameters stored in non-volatile memory when &F is issued.
102 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide $MB n n = speed $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.
103 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide $SB n n = speed $SB300 selects 300 bps at serial port. $SB1200 selects 1200 bps at serial port. $SB2400 selects 2400 bps at serial port. $SB4800 selects 4800 bps at serial port.
104 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide X n n = 0,1,2,3 or 4 * X0 selects Basic Result Codes (w/o CONNECT 1200, CONNECT 2400). X1 selects Extended Result Codes (w/CONNECT 1200, CONNECT 2400). X2 selects Standard AT Command set with NO DIAL TONE.
105 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Callback Security/Remote Configuration Command Summary Command Description #DBn #DB0 disables Callback Security and answering Yes to the prompt turns off Callback Security and erases stored phone numbers and passwords.
106 Appendix C - AT Command Summary Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Password Command Summary Command Description #Ixxxxxxxxxx Login Password is any keyboard characters (x) (upper/lower case sensitive), minimum 6 and maximum 10 characters.
107 Appendix D - V.25bis Operation Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix D - V .25bis Operation Chapter 4 described a set of commands which let the modem dial, hang-up, and be configured for various applications. However, these commands, the AT command set, are only functional when the DTE transmits data asynchronously.
108 Appendix D - V.25bis Operation Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide V.25bis Set-Up and Initialization Before you operate your modem in the V.25 bis mode, you need to make sure it is set up properly (various RS-232 lines such as DSR and CTS act as specified in the V.
109 Appendix D - V.25bis Operation Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide V.25bis Responses (Result Codes) When in V.25 bis mode (the AT$V1 command executed), your modem provides you with several responses which can help you follow the progress of V.
110 Appendix D - V.25bis Operation Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Dial Phone Number Provided (CRN) Command The CRN command permits the dialing of the phone number immediately following it (from the command line).
111 Appendix D - V.25bis Operation Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide ITU V.25bis Country Specific Information Due to the flexibility of the V.25 bis standard, each country may establish specific regulations governing the way operations are handled.
112 Appendix D - V.25bis Operation Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 5. Belgium a) Command/Indication modification (none) b) Delay and Forbidden list behavior 1. 1 min. delay between calls 2. After 4 retries, the number is put on the forbidden list 3.
113 Appendix E - MultiModemBA/BL Cables Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Appendix E - MultiModemBA Cables These cables connect your modem to your terminal or computer’s serial port.
114 Appendix F - Regulatory Information Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 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.
115 Appendix F - Regulatory Information Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Canadian Limitations Notice 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.
116 Appendix F - Regulatory Information Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 7. Some parameters required for compliance with Telecom’s Telepermit requirements are dependent on the equipment (PC) associated with this device.
117 Index Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Index Symbols 2 Wire/ 4 Wire Operation .................................... 83 2 Wire/4 Wire Operation ..................................... 83 A Abort T imer ...........................
118 Index Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Enable/Suppress Responses .............................. 7 8 Erase Callback Password (#RCBNxx) ................ 7 4 Erase Callback Phone Number (#RDNxx) ........... 7 4 Error Correction .
119 Index Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide Parity .................................................................. 1 8 Parity Selection (#P) ........................................... 5 1 Password Command Summary .............
An important point after buying a device Multi-Tech Systems MT2834BA (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Multi-Tech Systems MT2834BA yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Multi-Tech Systems MT2834BA - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Multi-Tech Systems MT2834BA you will learn all the available features of the product, as well as information on its operation. The information that you get Multi-Tech Systems MT2834BA will certainly help you make a decision on the purchase.
If you already are a holder of Multi-Tech Systems MT2834BA, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Multi-Tech Systems MT2834BA.
However, one of the most important roles played by the user manual is to help in solving problems with Multi-Tech Systems MT2834BA. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Multi-Tech Systems MT2834BA along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
