Multitech MultiModemII MT5600BR-V92 User manual

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MT5600BR-V92
Intelligent Data/Fax
Rack Mounted Modem
User Guide

MultiModem®II User Guide
MT5600BR-V.92
P/N S000392A Revision A
All rights reserved. This publication may not be reproduced, in whole or in part, without prior expressed
written permission from Multi-Tech Systems, Inc.
Copyright © 2006 by Multi-Tech Systems, Inc.
Multi-Tech Systems, Inc. makes no representations or warranties with respect to the contents hereof and
specifically disclaims any implied warranties of merchantability or fitness for any particular purpose. Fur-
thermore, Multi-Tech Systems, Inc. reserves the right to revise this publication and to make changes in
the content hereof without obligation of Multi-Tech Systems, Inc. to notify any person or organization of
such revisions or changes.
Record of Revisions
Revision Date Description
A 04/14/06 Manual released.
Trademarks
MultiModemII, Multi-Tech, and the Multi-Tech logo are trademarks of Multi-Tech Systems, Inc.
Microsoft, Windows, Windows XP is a trademarks of Microsoft Corporation in the United States and/or
other countries. All other trademarks are owned by their respective companies.
Patents
This device is covered by one or more of the following patents: 6,031,867; 6,012,113; 6,009,082;
5,905,794; 5,864,560; 5,815,567; 5,815,503; 5,812,534; 5,809,068; 5,790,532; 5,764,628; 5,764,627;
5,754,589; 5,724,356; 5,673,268; 5,673,257; 5,644,594; 5,628,030; 5,619,508; 5,617,423; 5,600,649;
5,592,586; 5,577,041; 5,574,725; 5,559,793; 5,546,448; 5,546,395; 5,535,204; 5,500,859; 5,471,470;
5,463,616; 5,453,986; 5,452,289; 5,450,425; 5,355,365; 5,309,562; 5,301,274. Other patents pending.
Technical Support
Country By Email By Phone
France: [email protected] +(33) 1-64 61 09 81
India: [email protected] [phone]
Europe, Asia, Africa: [email protected] +(44) 118 959 7774
U.S., Canada, all others: [email protected] [phone]
+[phone]
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, MN 55112
U.S.A
Telephone [phone] or [phone]
Fax [phone]
Technical Support [phone]
Internet http://www.multitech.com

ContentsMT5600BR-V92 User Guide
iii
Contents
Chapter 1 - Introduction ..........................................................................................................5
Product Description ........................................................................................................................... 5
General features ............................................................................................................................... 5
LED Indicators .................................................................................................................................. 6
Technical Specifications .................................................................................................................... 7
Chapter 2 - Installation ............................................................................................................9
Safety Warnings ................................................................................................................................ 9
Card Cage......................................................................................................................................... 9
Serial Cable ...................................................................................................................................... 9
Telephone Line ................................................................................................................................. 9
PC Board Controls .......................................................................................................................... 10
DIP-Switch Settings ........................................................................................................................ 10
OOS (Busy Out) Toggle Switch....................................................................................................... 12
Out of Service/Test Jumper ............................................................................................................ 12
Dial-Up and Leased Lines ............................................................................................................... 12
Installation ....................................................................................................................................... 13
Chapter 3 - Configuration......................................................................................................14
Configuring Your Software .............................................................................................................. 14
ConfiguringSoftware for Your Modem ............................................................................................. 14
PC Initialization Strings ................................................................................................................... 14
Changing Default Parameters ......................................................................................................... 15
Macintosh Initialization .................................................................................................................... 15
Chapter 4 - AT Commands....................................................................................................16
Fax Commands ............................................................................................................................... 16
Chapter 5 - Warranty and Repairs ........................................................................................17
Multi-Tech Warranty Statement ....................................................................................................... 17
Repair Procedures for U.S. and Canadian Customers .................................................................... 17
Repair Procedures for International Customers .............................................................................. 18
Repair Procedures for International Distributors .............................................................................. 18
Replacement Parts.......................................................................................................................... 18
Appendix A - Regulatory Compliance..................................................................................19
FCC Part 68 Telecom ..................................................................................................................... 19
FCC Part 15 .................................................................................................................................... 20
Fax Branding Statement.................................................................................................................. 20
Canadian Limitations Notice ............................................................................................................ 20
Industry Canada .............................................................................................................................. 21
EMC, Safety, and R&TTE Directive Compliance ............................................................................. 21
International Modem Restrictions .................................................................................................... 21
New Zealand Telecom Warning Notice ........................................................................................... 21

ContentsMT5600BR-V92 User Guide
iv
Appendix B - Updating Your Modem’s Firmware ...............................................................23
Introduction ..................................................................................................................................... 23
Upgrade Overview .......................................................................................................................... 23
Appendix C - ASCII Conversion Chart .................................................................................26
Appendix D – Waste Electrical and ......................................................................................27
Electronic Equipment (WEEE) ..............................................................................................27
Index........................................................................................................................................28

1 Introduction
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MT5600BR-V92 User Guide
Chapter 1 - Introduction
Congratulations on your purchase of the MultiModem® II intelligent data/fax modem, model MT5600BR-V92.
You have acquired one of the finest internal data/fax modems available today from one of the world’s
oldest modem manufacturers: Multi-Tech Systems, Inc. This User Guide will help you to install, configure,
test, and use your modem.
Product Description
The MT5600BR-V92 incorporates ITU-T V.92 protocol which provides quick connections, downstream
transmissions at speeds up to 56K bps*, and upstream transmissions at speeds up to 48K bps when
connected to V.92-compatible Internet service providers. Transmissions between the MT5600BR-V92 and
other client modems are limited to 33.6K bps, as are upstream transmissions to non-V.92-compatible
ISPs and downstream transmissions that are converted more than once on the telephone network.
Fax Communications: Supports Class 1, 1.0, and Class 2 faxing at 14.4K bps.
Features: Modem features include automatic fallback to slower speeds in noisy line conditions, and fall
forward to faster speeds as conditions improve. Can autodial, redial, pulse (rotary) and touch-tone dial.
Detects dial tones and busy signals for reliable call-progress detection. Compatible with the standard AT
command set used by most communication programs.
NOTE:
*Though this modem is capable of 56K bps download performance, line impairments, public telephone
infrastructure, and other external technological factors currently prevent maximum 56K bps connections.
General features
•Supports V.92/56K download speeds and 48K upload speeds when connecting with V.92 server
•Automatic fallback to slower speeds in noisy line conditions, and fall forward to faster speeds as
conditions improve.
•Serial port data rates adjustable to 115.2K bps
•ITU V.42 LAP-M and MNP Class 3 and 4 error correction
•ITU V.42bis (4-to-1), ITU V.44bis (6-to-1), and MNP 5 (2-to-1) data compression
•Automatic disabling of compression when transferring already compressed files
•Autodial, redial, pulse (rotary), and touch-tone dial
•Dial tone and busy signal detection for reliable call-progress detection
•Distinctive ring support to route data or fax calls on a single phone line
•FlashROM upgradable (customer upgradable in a Windows environment)
•Compatibility with the standard AT command set used by most communication programs
•Nonvolatile memory for storage of customized modem parameters and ten telephone numbers
Fax
•Responds to Class 1, 1.0, and Class 2 fax commands, enabling it to exchange editable and
encrypted faxes with other Windows computers
•Sends and receives faxes from your computer at 14,400 bps, 9600 bps, 7200 bps, 4800 bps, 2400
bps, or 300 bps

1 Introduction
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MT5600BR-V92 User Guide
LED Indicators
The MT5600BR-V92 has ten LED diagnostic indicators.
RCV XMT CO 56 33.6 14.4 OH DTR RI ERR
RCV - This LED blinks when data is being received, on for a space, off for a mark. The state of this
RCV LED matches that of the RCV circuit on Pin 3 of the RS232C/V.24 interface.
XMT - This LED blinks when data is being transmitted, on for a space, off for a mark. The state of
this LED matches that of the XMT circuit on Pin 2 of the RS232C/V.24 interface.
CO - This LED lights when a valid carrier tone has been detected.
56 - This LED is lit when the modem connects using V.92 protocol. The actual connection speed
depends on ISP server capabilities and line conditions.
33.6 - This LED is lit when the modem is connected at 33,600 bps. Note that when both 33 and 14
LEDs light, modem is in 16,800 to 33,600bps mode of operation.
14.4 - This LED is lit when the modem is connected at 14,400 bps.
OH
- This LED is lit when the phone line is “off hook” . This occurs when the modem is dialing, on
line, or answering a call. The LED also flashes when the modem is pulse dialing in the
Command Mode.
DTR - When the DTR LED is lit, the modem is permitted to answer an incoming call. When DTR
goes off, a connected modem disconnects if dependent on DTR. The state of this DTR LED
matches that of the DTR circuit on Pin 20 of the RS232C/V.24 interface.
RI - This LED is lit during the ringing interval as an incoming call is received.
ERR - When the ERR LED is flashing, the leased line is down and the modem is in self-test mode
has failed. When ERR LED is on, this indicates the modem is in an out of service ( OOS ) state.
When the modem is out of service, it is busy to incoming calls.

1 Introduction
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MT5600BR-V92 User Guide
Technical Specifications
Your MT5600BR-V92 data/fax modem meets the specifications listed below:
Model Number MT5600BR-V92
Server-to-Client V.90 speeds when accessing a V.90 or V.92 server (actual
Data Rates speed depends on server capabilities and line conditions) *
Client-to-Server Up to 50Kbps when accessing a V.92 server (actual speed
Data Rates depends on server capabilities and line conditions); other
wise, the same as client-to-client data lines.
Client-to-Client 33600,31200, 28800, 26400, 24000, 21600, 19200, 16800,
Data Rates 14400, 12000, 9600, 7200, 4800, 2400, 1200, 0-300 bps
Fax Data Rates 14400, 12000, 9600, 7200, 4800, 2400, 1200, 0-300 bps
Data Format Serial, binary, asynchronous, synchronous
Modem Compatibility ITU-T V.92, V.90, V.34 enhanced, V.34, V.34bis, V.32,
V.22bis, V.22; Bell 212A and 103; ITU-T V.21; V.42,
V.42bis, V.44, V.25bis
Fax Compatibility T.4, T30, V.21, V.27ter, V.29, V.34, V.17; TIA/EIA 578 Class
1, 1.0, 2, TR29.2
Video Compatibility ITU-T V.80 for H.34 video conferencing
Error Correction ITU-T V.42 (LAP-M or MNP 4)
Data Compression ITU-T V.44 (6:1 throughput), V.42bis (4:1 throughput), MNP
5 (2:1 throughput)
Speed Detection Automatic speed detection and switching between available
speeds
Speed Conversion Serial port data rates adjustable to 300; 1200; 2400; 4800;
9600; 19,200; 38,400; 57,600; 115,200 bps
Mode of Operation Full duplex data over dial-up line, 2-wire and 4-wire lease
line; automatic or manual dialing, automatic or manual
answer
Flow Control XON/XOFF (software), RTS/CTS (hardware)
Intelligent Features Full AT command compatible, redial, repeat dial, pulse or
tone dial, dial pauses, auto answer, adaptive answer; EIA
extended automode; adaptive line probing; automatic
symbol and carrier frequency during start-up, retrain and
rate renegotiation, DTMF detection, call status display, auto-
parity and data rate selections, keyboard-controlled modem
options, non-volatile memory, quick-connect startup
*Though these modems are capable of 56K bps download performance, line impairments,
public telephone infrastructure and other external technological factors currently prevent
maximum 56K bps connections.

1 Introduction
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MT5600BR-V92 User Guide
Command Buffer 60 Characters
Transmission Level -11 dBm (dial-up), -15dBm (lease line); dBm level selectable
with DIP-Switch #3 in lease line setting
Frequency Stability ±0.01%
Receiver Sensitivity -43 dBm under worst-case conditions
AGC Dynamic Range 43 dB
Interface EIA RS232C/ITU-TSS V.24
Diagnostics Power-on Self Test and Local analog loop
Environmental Temperature range 0°–50°C (32°–120°F);
humidity range 20–90% (non-condensing)
Storage Temperature -10° to +85°C (14°- 185° F)
Dimensions 10½ wide x 5½ long
Weight 8 oz
Operating Systems Tested for use with Windows 98, NT, 2000, XP, 2003 Server
and Linux (2.2.x kernal)
Limited Warranty 10 years

1 Introduction
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MT5600BR-V92 User Guide
Chapter 2 - Installation
SafetyWarnings
•Use this product only with UL- and CUL-listed computers (U.S.A.)
•To reduce the risk of fire, use only UL-listed 26 AWG (.41mm) or larger telephone wiring.
•Never install telephone wiring during a lightning storm.
•Never install a telephone jack in a wet location unless the jack is specifically designed for wet
locations.
•Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.
•Use caution when installing or modifying telephone lines.
•Avoid using a telephone during an electrical storm; there is a risk of electrical shock from lightning.
•Do not use a telephone in the vicinity of a gas leak.
•The telephone cord is to be disconnected before accessing the inside of the equipment.
Card Cage
The MT5600BR-V92 is designed to mount in the Multi-Tech Systems' modem rack. This rack is an EIA-
standard 19-inch wide by 7-inch high rack, and mounts in any standard computer cabinet. The rack has a
sixteen modem slot capacity, redundant power supply capability, sixteen 25-pin (female) connectors for
RS232C/V.24 interface and sixteen RJ11 back-plane connectors for phone line interface.
Serial Cable
You must provide a serial cable to connect each corresponding MT5600BR-V92 to your computer. The
cable must have a DB-25 male interface into the modem rack.
Telephone Line
The MT5600BR-V92 uses one RJ11 jack per corresponding modem slot to connect to the telephone line.
One end of the RJ11 cable provided with the modem connects the rack's RJ11 connector (located on the
back plane of the modem rack) and the other end connects to the phone-company-provided RJ11 or
RJ11W modular phone jack.

1 Introduction
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MT5600BR-V92 User Guide
PC Board Controls
The MT5600BR-V92 is designed on a single printed circuit board. This board contains sixteen DIP-
Switches. There is a two-position "Out of Service" (OOS) toggle switch that extends from the front of the
modem circuit card. There is also a two-position TEST/OOS berg jumper located towards the back and
center of the card.
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The sixteen DIP-Switches and berg jumper control various modem options or set default values for the
MT5600BR-V92 Command mode. There is a difference in how several of the switches operate depending
on whether you are in synchronous or asynchronous mode (DIP-Switch #12).
Most communications software packages have installation procedures of their own, which call for certain
modem DIP-Switch settings. If you are using such a package, follow the software's instructions.
DIP-Switch Settings
The vast majority of installations are similar, with the MT5600BR-V92 being used to dial up a remote
installation where the call is automatically answered. The factory default DIP-Switch settings are based
on this assumption. The following is a brief description and summary of the MT5600BR-V92's DIP-Switch
options:
Switch Function Position Effect
#1 DTR Forced/ UP* DTR dependent on interface
DTR from Interface * DOWN DTR forced ON at all times
#2 Flow Control &E4* UP* Hardware flow control
(Async/Dial-Up/Leased Line) DOWN Software flow control
#2 SDLC*/BSC (Sync) UP* SDLC mode
DOWN BSC mode
#3 Result Codes Enabled* UP Q1 Disable Responses
(Async Dial-up) DOWN* Q0 Enable Responses
#3 DbM Transmit -15dB/-11dB* UP Lease Line
(Async/Sync/Leased Line) DOWN* transmits at -11dB
#4 No affect in async
#4 AS/400 Mode Disabled* UP* AS/400 Mode OFF
(Sync Dial-Up/Leased Line) DOWN AS/400 Mode ON
#5 Auto-Answer Enabled* UP* Enable Auto Answer
(Async/Sync/Dial-Up) DOWN Disable Auto Answer
*Factory default setting.

2 Installation
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MT5600BR-V92 User Guide
Switch Function Position Effect
#5 Answer/Originate* UP* Answer Mode
(Async/Sync/Leased Line) DOWN Originate Mode
#6 Max-Throughput Enabled* UP* Modem set-up to
(Async/Dial-Up/Leased) DOWN operate at highest
efficiency level
#6 Slave Clock Disabled* UP* Slave Clocking OFF
(Sync/Dial-Up/Leased) DOWN Slave Clocking ON
#7 RTS/Normal/Forced* UP RTS dependent on interface
(Sync/Async/Dial/Leased) DOWN* RTS forced ON
#8 Command Mode Enabled* UP Disable Command Mode
(Sync/AsyncDial/Leased) DOWN* Enabled Command Mode
#9 No affect
#10 Dial-Up*/Leased-Line UP* Dial-Up Operation
DOWN Lease Line Operation
#11 No affect in async
#11 Internal*/External Clocking UP External Clock
(Synchronous) DOWN* Internal Clock
#12 Sync/Async Mode* UP Sync Operation
DOWN* Async Operation
Dip Switch Settings #13 - 16
Switch Position Effect
13/14 UP/UP* V.92 Operation (Default)
13/14 DOWN/UP V.34 Operation
13/14 UP/DOWN V.32b Operation
13/14 DOWN/DOWN V.22b Operation
#15 UP* CD/DSR from Interface
#15 DOWN CD/DSR Forced On
#16 UP 2-WireOperation
#16 DOWN 4-Wire Operation
* Factory default setting

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MT5600BR-V92 User Guide
OOS (Busy Out)Toggle Switch
The MT5600BR-V92 contains a two-position OOS switch on the front panel. This switch can be used to
create a “busy out” (OOS) condition for the modem (i.e., take the modem off-hook). To place a modem in
the Busy condition, move the OOS toggle switch to the (BUSY) position. The modem then goes off-hook,
its OOS and OH LEDs light, and incoming calls to this modem get a busy signal. If you suspect a problem
with a particular modem, you can use the BUSY switch to have an optional device (such as a “hunt
group” ) that looks for a non-busy line to perform a “roll over” to the next available modem while you check
the status of the Busy modem.
Out of Service/Test Jumper
When the MT5600BR-V92 is Out Of Service ( OOS ), it is busy to incoming calls. In the Test (default)
setting, the modem drives pin 25 high when the modem is in Test mode. In the OOS (optional) setting, the
computer or terminal forces pin 25 high and puts the modem in a busy condition. Note that jumper
(shorting) plugs are not shipped with the MT5600BR-V92, but is provided by Multi-Tech’s Tech Support
group on request.
P7
J7 P7
J7
Test Setting (Factory Default) OOS Setting (Optional)
Dial-Up and Leased Lines
Connection to the phone system is made via RJ11 type jacks such as an RJ11C or RJ11W. It can also
be connected to an analog RJ41 or an RJ45S jack, but would not use these jack's digital dB-level
programming features. The MT5600BR-V92 is designed to transmit at a permissive level of -11dB.
To connect the modem to the phone lines, one end of the RJ11 cable that is provided with the modem
plugs into the RJ11 connector located on the back plane of the modem rack and the other end into the
phone-company-provided RJ11 or RJ11W modular phone jack. Make sure that DIP-Switch #10 is in the
UP position (default) when in dial-up mode.
Although the majority of installations involves dial-up lines, the MT5600BR-V92 also connects to two-wire
leased lines (sometimes referred to as dedicated, private, or 3002 lines) and four-wire lease lines.
To connect the modem to leased lines, first determine the type of line termination provided by the phone
company. Most phone companies provide a terminal block with a pair of screws. Some provide a
conventional RJ11 type of connector. If the RJ11 connector is used, you can use the same cable that you
use for dial-up connection. If the screw terminal type connector is used, you may need to order the
#CA167 cable from Multi-Tech Systems.
For a lease line connection, make two DIP-Switch setting changes on the modem's PC board. The first
involves placing DIP-Switch #10 in the DOWN position (changes the modem from dial-up to leased line
operation). The second DIP-Switch change requires that one of the two modems on the leased line circuit
is set to "originate" , and the other is set to "answer" . To do this, change the setting of DIP-Switch #5.
When you changed the DIP-Switch #10 setting, you also changed the function of DIP-Switch #5. Now the
UP position selects answer mode while the DOWN position selects originate mode. Place DIP-Switch #5
in the UP position on one of the two modems, and on the other modem, place Switch #5 DOWN. It
doesn't matter which is which, just so you have local and remote modems in opposite modes.

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MT5600BR-V92 User Guide
Installation
Perform the following procedure to install modem cards into the CC1600 rack. The installation process
involves:
1. Verify that the DIP-Switch settings conform to your application (dial-up or lease line).
2. Slide a modem card into one of sixteen available modem slots. Start by inserting a modem
into the left-most channel (slot #1) of the rack. The toggle switch should be at the bottom of
the card, with the component side of the card facing the right. The modem’s gold edge con-
nector is offset so that the modem cannot be inserted incorrectly. Continue installing modem
cards as necessary.
3. Connect one end of an RS232C Cable to the appropriate modem slot (DB25/25-pin connec-
tor-female) at the rear of rack. The other end of the RS232C cable is connected to the serial
port of the computer.
Note: Any cables connected to the computer must be shielded to reduce interference.
4. Plug one end of the RJ11 cable provided with the modem into the rack's RJ11 connector
(located on the back plane of the modem rack) and the other end into the phone-company-
provided RJ11 or RJ11W modular phone jack.
5. Verify the remote modem's current configuration settings with your MT5600BR-V92 in terms
of data compression, error correction, transmission rate, etc. (Refer to Chapter 4 for AT com-
mands).
6. Make sure modem and computer/terminal serial port baud rates are adjusted.
7. Proceed to Chapter 3 of this manual, or to your data communications software manual for
modem configuration.

3 Configuration
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MT5600BR-V92 User Guide
Chapter 3 - Configuration
ConfiguringYour Software
Communications software must be configured to work with your modem, your computer, and the remote
system it is calling. Fortunately, most communications programs make the process easy by providing a
default initialization string for your modem as well as defaults for most of the other required parameters.
Configuring Software forYour Modem
Because remote computers may have different connection requirements such as speed, number of bits,
parity, log-on sequences, etc., communications software is typically configured by sessions , each session
having a unique configuration for a given connection (e.g., to an FTP site or commercial online service).
Most communications programs, however, have a separate modem configuration menu because modem
configurations rarely change from session to session.
The most important configuration is the modem initialization string. This is a sequence of commands the
software uses to configure the modem when the communications software is loaded or when a session
begins. Always begin the initialization string with the AT tention command AT, then follow it with the
modem reset command, &F. Issuing a reset command before other commands ensures that you are
starting with a known state.
The rest of the commands in the initialization string depend on the capabilities of the modem and what
you want it to do. Some older communications programs require you to create the initialization string by
yourself. Most modern communications programs, however, provide you with a ready-made initialization
string that is automatically selected when you choose your modem model from a list. It is a poor idea to
use an initialization string intended for another modem, especially one from another manufacturer,
because modem capabilities and command implementations vary from modem to modem. However, if
your MT5600BR-V92 does not appear on a modem list, you may use the MultiModemII initialization
string.
PC Initialization Strings
We recommend the following initialization string for a MT5600BR-V92 connected to a PC-compatible
computer:
AT &F X4 S0=0 ^M
This string resets the MT5600BR-V92 to the factory default settings, selects extended result codes with
NO DIAL TONE and BUSY, and turns off auto-answer. ^M must end every string sent to the modem from
software. It is the ASCII code for the RETURN key on most keyboards, and the default code for the
carriage return character in the MT5600BR-V92 and most communications programs. The carriage return
character is defined in the MT5600BR-V92 in S-register S3; if you change it, you must also change the
carriage return character code used in your communications software. If you send a command directly to
the modem in terminal mode rather than indirectly through communications software, you must end the
command string by pressing the RETURN key (<CR>) instead of adding ^M to the string.

3 Configuration
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MT5600BR-V92 User Guide
Changing Default Parameters
The default values for the other parameters in modem configuration menus rarely need changing. They
typically include the dialing prefix (ATDT for touch-tone service and ATDP for rotary service), the dialing
suffix (^M), the hang-up string (+++) ”Response” then (ATH0^M), and response messages ( RING, NO
CARRIER, BUSY, etc.). Communications software with a host mode might also include an auto-answer
string (AT S0=1^M).
Macintosh Initialization
Macintosh computers cannot use RTS/CTS hardware flow control without a serial cable wired for
hardware control. The Macintosh 128 and 512 models cannot use RTS/CTS flow control at all. For those
Macintoshes turn off the default RTS/CTS hardware flow control, turn on XON/XOFF flow control, and
ignore DTR:
AT &F X4 &k4 &D0 ^M
For hardware flow control, use the following initialization string:
AT &F X4 &K3 &D0 ^M
Add S0=0 to both strings to disable auto-answer if the MT5600BR-V92 is on a voice line.
You can store the initialization string in nonvolatile memory. With your communications software open and
connected to the modem’s COM port, type the initialization string in the terminal window, substituting a
carriage return for ^M. To store the string, enter
AT &W0 <CR>.
Now you can initialize your modem with the following simple string:
AT Z ^M

4 AT Commands and Fax Commands
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MT5600BR-V92User Guide
Chapter 4 - AT Commands
A complete AT Commands, S-Registers, and Result Codes Reference Guide can be found on the
MT5600BR-V92 CD and on the Multi-Tech Web site.
Fax Commands
Fax commands resemble AT commands, but are more complicated to use. Because of this, we
recommend that you use a fax program to send and receive faxes rather than attempting to control the
modem directly. Developers who need to know the fax commands for the MT5600BR-V92 can find Fax
Class 1 and Fax Class 2 Reference Guides on the MT5600BR-V92 CD as well as the Multi-Tech Web
site.

5 - Warranty and Repairs
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MT5600BR-V92 User Guide
Chapter 5 -Warranty and Repairs
Multi-TechWarranty Statement
Multi-Tech Systems, Inc., (hereafter “MTS”) warrants that its products will be free from defects in material
or workmanship for a period of two, five, or ten years (depending on model) from date of purchase, or if
proof of purchase is not provided, two, five, or ten years (depending on model) from date of shipment.
MTS MAKES NO OTHER WARRANTY, EXPRESS OR IMPLIED, AND ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED.
This warranty does not apply to any products which have been damaged by lightning storms, water, or
power surges or which have been neglected, altered, abused, used for a purpose other than the one for
which they were manufactured, repaired by Customer or any party without MTS’s written authorization, or
used in any manner inconsistent with MTS’s instructions.
MTS’s entire obligation under this warranty shall be limited (at MTS’s option) to repair or replacement of
any products which prove to be defective within the warranty period or, at MTS’s option, issuance of a
refund of the purchase price. Defective products must be returned by Customer to MTS’s factory —
transportation prepaid.
MTS WILL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES, AND UNDER NO CIRCUMSTANC-
ES WILL ITS LIABILITY EXCEED THE PRICE FOR DEFECTIVE PRODUCTS.
Repair Procedures for U.S. and Canadian Customers
In the event that service is required, products may be shipped, freight prepaid, to our Mounds View, Min-
nesota factory:
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, MN 55112 U.S.A
Attn: Repairs, Serial # ____________
A Returned Materials Authorization (RMA) is not required. Return shipping charges (surface) will be paid
by MTS to destinations in U.S. and Canada.
Please include, inside the shipping box, a description of the problem, a return shipping address (must
have street address, not P.O. Box), your telephone number, and if the product is out of warranty, a check
or purchase order for repair charges.
For out of warranty repair charges, go to COMPANY/Policies/warranty/
Extended two-year overnight replacement service agreements are available for selected products.
Please call MTS customer service at [phone] or visit our web site at COMPANY/Programs/
overnight_replacement for details on rates and coverage’s.
Please direct your questions regarding technical matters, product configuration, verification that the prod-
uct is defective, etc., to our Technical Support department at [phone] or email
[email protected]. Please direct your questions regarding repair expediting, receiving, shipping,
billing, etc., to our Repair Accounting department at [phone] or [phone], or email
[email protected].
Repairs for damages caused by lightning storms, water, power surges, incorrect installation, physical
abuse, or user-caused damages are billed on a time-plus-materials basis.

5 - Warranty and Repairs
18
MT5600BR-V92 User Guide
Repair Procedures for International Customers
(Outside U.S.A. and Canada)
Your original point of purchase Reseller may offer the quickest and most economical repair option for
your Multi-Tech product. You may also contact any Multi-Tech sales office for information about the
nearest distributor or other repair service for your Multi-Tech product. The Multi-Tech sales office
directory is available at http://www.multitech.com/COMPANY/contact_us/
In the event that factory service is required, products may be shipped, freight prepaid to our Mounds
View, Minnesota factory. Recommended international shipment methods are via Federal Express, UPS
or DHL courier services, or by airmail parcel post; shipments made by any other method will be refused.
Please include, inside the shipping box, a description of the problem, a return shipping address (must
have street address, not P.O. Box), your telephone number, and if the product is out of warranty, a check
in U.S. dollars drawn on a U.S. bank or your company’s purchase order for repair charges. Repaired
units shall be shipped freight collect, unless other arrangements are made in advance.
Please direct your questions regarding technical matters, product configuration, verification that the
product is defective, etc., to our Technical Support department nearest you or email
[email protected]. When calling the U.S., please direct your questions regarding repair expediting,
receiving, shipping, billing, etc., to our Repair Accounting department at +[phone] in the U.S.A., or
email [email protected].
Repairs for damages caused by lightning storms, water, power surges, incorrect installation, physical
abuse, or user-caused damages are billed on a time-plus-materials basis.
Repair Procedures for International Distributors
International distributors should contact their MTS International sales representative for information about
the repair of the Multi-Tech products.
Please direct your questions regarding technical matters, product configuration, verification that the
product is defective, etc., to our International Technical Support department at +[phone]. When
calling the U.S., please direct your questions regarding repair expediting, receiving, shipping, billing, etc.,
to our Repair Accounting department at +[phone] in the U.S.A. or email
[email protected].
Repairs for damages caused by lightning storms, water, power surges, incorrect installation, physical
abuse, or user-caused damages are billed on a time-plus-materials basis
Replacement Parts
SupplyNet, Inc., can supply you with replacement power supplies, cables and connectors for selected
Multi-Tech products. You can place an order with SupplyNet via mail, phone, fax or the Internet at the
following addresses:
Mail: SupplyNet, Inc.
614 Corporate Way
Valley Cottage, NY 10989
Phone: [phone]
Fax: [phone]
Email: [email protected]
Internet: http://www.thesupplynet.com

Appendix A - Regulatory Compliance
19
MT5600BR-V92 User Guide
Appendix A - Regulatory Compliance
FCC Part 68Telecom
1. This equipment complies with part 68 of the Federal Communications Commission Rules. On
the outside surface of this equipment is a label that contains, among other information, the
FCC registration number. This information must be provided to the telephone company.
2. The suitable USOC jack (Universal Service Order Code connecting arrangement) for this
equipment is shown below. If applicable, the facility interface codes (FIC) and service order
codes (SOC) are shown.
3. An FCC-compliant telephone cord and modular plug is provided with this equipment. This
equipment is designed to be connected to the telephone network or premises wiring using
a compatible modular jack that is Part 68 compliant. See installation instructions for details.
4. The ringer equivalence number (REN) is used to determine the number of devices that
may be connected to the telephone line. Excessive RENs on the telephone line may result
in the device not ringing in response to an incoming call. In most, but not all, areas the sum
of the RENs should not exceed 5.0. To be certain of the nuber of devices that may be
connected to the line, as determined by the total RENs, contact the local telephone
company.
5. If this equipment causes harm to the telephone network, the telephone company will notify
you in advance that temporary discontinuance of service may be required. But if advance
notice is not practical, the telephone company will notify you as soon as possible. Also, you
will be advised of your right to file a complaint with the FCC if you believe it is necessary.
6. The telephone company may make changes in its facilities, equipment, operations, or
procedures that could affect the operation of the equipment. If this happens, the telephone
company will provide advance notice in order for you to make necessary modifications in
order to maintain uninterrupted service.
7. If trouble is experienced with this equipment (the model of which is indicated below) please
contact Multi-Tech Systems, Inc. at the address shown below for details of how to have
repairs made. If the trouble is causing harm to the telephone network, the telephone
company may request you remove the equipment from the network until the problem is
resolved.
8. No repairs are to be made by you. Repairs are to be made only by Multi-Tech Systems or
its licensees. Unauthorized repairs void registration and warranty.
9. This equipment should not be used on party lines or coin lines.
10. If so required, this equipment is hearing-aid compatible.
11. Manufacturing information:
Manufacturer: Multi-Tech Systems, Inc.
Trade Name MultiModem®II
Model Number: MT5600BR-V92
FCC Registration No: AU7USA32234--M5-E
Ringer Equivalence No: 0.4B
Modular Jack (USOC): RJ11C
Service Center in USA: Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, MN 55112
U.S.A.

Appendix A - Regulatory Compliance
20
MT5600BR-V92 User Guide
FCC Part 15
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses, and can radiate radio frequency
energy, and if not installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Plug the equipment into an outlet on a circuit different from that to which the receiver is con-
nected.
• Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC rules. Operation of this device is subject to the following
conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference that may cause undesired operation.
WARNING: Changes or modifications to this unit not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
Fax Branding Statement
The Telephone Consumer Protection Act of 1991 makes it unlawful for any person to use a computer or
other electronic device, including fax machines, to send any message unless such message clearly
contains the following information:
• Date and time the message is sent
• Identification of the business or other entity, or other individual sending the message
• Telephone number of the sending machine or such business, other entity, or individual
This information is to appear in a margin at the top or bottom of each transmitted page or on the first page
of the transmission. (Adding this information in the margin is referred to as fax branding .)
Since any number of fax software packages can be used with this product, the user must refer to the fax
software manual for setup details. Typically the fax branding information must be entered via the
configuration menu of the software.
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. The termination on an
interface may consist of any combination of devices subject only to the requirement that the sum of the ringer
equivalence numbers of all the devices does not exceed 5.
Notice: The Industry Canada label identifies certified equipment. This certification means that the equipment
meets certain telecommunications network protective, operational, and safety requirement. The Industry
Canada label does not guarantee the equipment will operate to the user’s satisfaction.