Multitech MultiModem MT5634ZBA-V-V92 User manual

MultiModem®ZBA
MT5634ZBA-Series
MT5634ZBA
MT5634ZBA-Global
MT5634ZBA-V92
MT5634ZBA-V-V92
User Guide

MultiModem ZBA
MT5634ZBA-Series User Guide
MT5634ZBA, MT5634ZBA-Global, MT5634ZBA–V.92, MT5634ZBA-V–V.92
PN S000286G, Version G
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 © 2003-8, by Multi-Tech Systems, Inc.
Multi-Tech Systems, Inc. makes no representations or warranty 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. 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.
Revisions
Revision Level Date Description
A 02/12/03 Initial release.
B 01/10/04 Change Technical Specification for Power Requirements; remove Modem-on-
Hold references; remove references to self-resetting.
C 10/29/04 Changed Country Code terminology to Country/Region Code.
D08/04/05 Add new Recycling Statement (WEEE). Delete “Removing Old Modem Drivers”
section on page 11. Change data rate from 4400 to 14400 on page 28. Remove
BBS reference on page 30. Fix Web link on page 12.
E 01/09/06 Combining new global and nonglobal MultiModemZBA products.
F 04/17/07 Updated the Technical Support contact list.
G 11/01/08 Update Technical Support contact list, driver installation procedure, and minor
editorial changes.
Trademarks
MultiModem, Multi-Tech, and the Multi-Tech logo are trademarks of Multi-Tech Systems, Inc. All other brand and
product names mentioned in this publication are registered trademarks or trademarks of their respective companies.
Patents
This device 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; D353, 598;
5,355,365; 5,309,562; 5,301,274
Other Patents Pending
World Headquarters
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, Minnesota 55112
Phone: [phone] or 800-328-9717
Fax: [phone]
Technical Support
Country By Email By Phone
Europe, Middle East, Africa: [email protected] +(44) 118 959 7774
U.S.,Canada, all others: [e-mail] [phone] or [phone]
Internet Address: http://www.multitech.com

Table of Contents
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 3
Table of Contents
Chapter 1 – Introduction ...............................................................................................................................................5
Features Table.........................................................................................................................................................5
Chapter 2 – Installation .................................................................................................................................................7
Safety Warnings.......................................................................................................................................................7
Step 1: Change the Internal Jumpers.......................................................................................................................7
Step 2: Connect the Modem to Your PC..................................................................................................................9
Step 3: Install the Modem Driver............................................................................................................................11
Step 4: Configure the Modem for Your Country or Region – Global Product Only.................................................12
Step 5: Install Data Communications Software – All Products...............................................................................13
Chapter 3 – Operation.................................................................................................................................................14
About the Front Panel ............................................................................................................................................14
PhoneTools Features.............................................................................................................................................15
Leased-Line Operation...........................................................................................................................................15
V.92 Operation.......................................................................................................................................................15
Connecting to the Internet......................................................................................................................................16
Chapter 4 – AT Commands, S-Registers, and Result Codes...................................................................................17
Chapter 5 – Remote Configuration.............................................................................................................................18
Basic Procedure.....................................................................................................................................................18
Setup......................................................................................................................................................................18
Chapter 6 – Callback Security ....................................................................................................................................19
Changing the Setup Password...............................................................................................................................19
Turning Callback Security On and Off....................................................................................................................19
Setting Callback Security Message Parity..............................................................................................................20
Assigning Callback Passwords and Phone Numbers.............................................................................................20
Calling Procedures.................................................................................................................................................20
Callback Assignments Form...................................................................................................................................23
Chapter 7 – Troubleshooting......................................................................................................................................24
None of the Indicators Light ...................................................................................................................................24
The Modem Does Not Respond to Commands......................................................................................................24
The Modem Cannot Connect When Dialing...........................................................................................................25
The Modem Disconnects While Online ..................................................................................................................26
Modem Cannot Connect When Answering ............................................................................................................26
File Transfer Is Slower Than It Should Be..............................................................................................................26
Data Is Being Lost..................................................................................................................................................27
There Are Garbage Characters on the Monitor......................................................................................................27
The Modem Doesn’t Work with Caller ID ...............................................................................................................27
Fax and Data Software Can’t Run at the Same Time.............................................................................................27
Appendix A – Technical Specifications.....................................................................................................................28
Appendix B – Upgrading the Modem’s Firmware.....................................................................................................30
Upgrade Overview..................................................................................................................................................30
Appendix C – Regulatory Compliance.......................................................................................................................32
FCC Part 15 Regulation.........................................................................................................................................32
FCC Part 68 Telecom.............................................................................................................................................32
Canadian Limitations Notice...................................................................................................................................33
Industry Canada.....................................................................................................................................................33
EMC, Safety and R&TTE Directive Compliance.....................................................................................................33
International Modem Restrictions...........................................................................................................................33
New Zealand Telecom Warning Notice..................................................................................................................34
South African Statement ........................................................................................................................................34
Appendix D – Waste Electrical and Electronic Equipment ......................................................................................35
WEEE (Waste Electrical and Electronic Equipment) Statement.............................................................................35
Appendix E – Installing a Modem under Linux .........................................................................................................36
Appendix F – Connecting to a Cisco Router.............................................................................................................37

Table of Contents
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 4
Appendix G – Warranty, Service, and Technical Support........................................................................................39
Appendix H – ROHS HT/TS Substance Concentration.............................................................................................41
Index.............................................................................................................................................................................42

Chapter 1 – Introduction
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 5
Chapter 1 – Introduction
Congratulations on your purchase of the MultiModem ZBA modem. You have acquired one of the finest intelligent
voice/data/fax modems available today from one of the world’s oldest modem manufacturers: Multi-Tech Systems, Inc.
The MT5634ZBA-Series is available in global and non-global builds with and without the voice feature. The MT5634ZBA
global product is approved in 40+ countries. The MT5634ZBA with the voice feature supports voice mail and a full-duplex
speakerphone. This allows you and the caller to speak and listen at the same time.
This user guide will help you to install, configure, test and use your modem.
Features Table
FEATURES
PRODUCTS
MT5634ZBA
MT5634ZBA-Global
MT5634ZBA-V92
MT5634ZBA-V-V92
V.90/56K Max. Data Speed x x
V.92/56K Max. Data Speed x x
Global Approval in Many Countries for Worldwide Use x x x
Voice Support x
Callback Security x x x x
2-Wire Leased-Line Support x x x x
DTMF Tone Detection x x
Phone Number Storage for Automatic or DTR Dialing x x x x
Common Features:
•V.90 or V.92 Related Features x x x x
•Remote Configuration x x x x
•Error Correction x x x x
•Caller ID (U.S. Only) x x x x
•Multi-Language Data/Fax Software for Windows x x x x
•Windows Plug and Play Operation x x x x
•Flash Memory for Easy Updates x x x x
•Ten Year Warranty x x x x
Features Specific to V.90
•Speed – V.90/56K download speeds from V.90 servers and 33.6K upload speeds.
•Fax – Class 1 and 2 faxing at 14.4K.
•Compression – V.42 bis, MNP Class 5 compression.

Chapter 1 – Introduction
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 6
Features Specific to V.92
•Speed – V.92/56K download speeds and 48K upload speeds when connecting with V.92 server.
•Fax – Class 1, 1.0, 2, and 2.1 faxing at speeds to V.34/33.6K bps (Super G3).
•Compression – V.44 compression improves data throughput rates.
•Quick Connect – Quick connect can cut the time required for a dial-up modem to “handshake” to an ISP or
other connection in half.
Please note that some V.92 features are turned off in the factory default configuration, and may need to be turned
on, depending on your needs.

Chapter 2 – Installation
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 7
Chapter 2 – Installation
This chapter shows you step-by-step how to set up your Multi-Tech MT5634ZBA modem.
Safety Warnings
•Use this product only with UL- and CUL-listed computers (U.S.A. and Canada)
•To reduce the risk of fire, use only 26 AWG (.41mm) or larger telephone wiring.
•Never install telephone wiring during a lightning storm.
•Never install a telephone jack in 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.
•This product must be disconnected from the telephone network interface when servicing.
Step 1: Change the Internal Jumpers
This step is required only if:
•You intend to use the modem on a leased line.
•You intend to add a monophonic external speaker to your modem with the voice option. No changes are needed
for stereo.
This will require you to open the modem and move one or more jumpers on the modem’s printed circuit board.
Warning: The following procedure must be performed by authorized service personnel.
Caution: The circuit board can be harmed by static electricity. Before you open the case, touch a grounded object, such
as the metal chassis of your computer, to discharge any static electricity in your body, then touch the metal shell of the
modem’s RS-232 connector to ensure that there is no voltage difference between you and the modem.
Opening the Modem
1. If the modem is connected, turn it off and remove all connecting cables (including the power and line
cables).
2. Turn the modem upside down.
3. On the bottom of the modem are two screws, which hold the case together. Remove both screws and set
them aside.
4. Turn the modem right side up.
5. Remove the top part of the modem case.
6. To close the modem, reverse Steps 1–5.

Chapter 2 – Installation
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 8
Location of the Jumpers
Note: J8 is the Jumper for the Modem with Voice Option
Changing the Dial-Up/Leased-Line Jumper
As shipped from the factory, your modem is configured for normal dial-up operation. That is, the modem must
dial a phone number to connect to another modem. To use the modem on a leased line, you must change
jumper J10 to select leased line operation, and J11 to select whether it will be the originating or the answering
modem. If dial-up operation is selected, J11 has no effect.
See Chapter 3 for additional leased line information.
•The factory default is the answer position. This makes the modem the answering modem on the leased
line.
•To use the modem on a leased line, move the J10 jumper plug from the default dial-up position to the
leased line position.
•To make the modem the originating modem on the leased line, move the J11 jumper plug to the originate
position.
Changing the Voice Jumper
The speaker jumper (J8) is next to the external speaker jack.
•The factory default position of the voice jumper is set for a stereo speaker or sound card. A jumper plug
covers both pins of the J8 jumper.
•To use the modem with a monophonic external speaker, remove the jumper plug from the J8 jumper pins.
You can store it by placing it on one jumper pin.

Chapter 2 – Installation
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 9
Step 2: Connect the Modem to Your PC
Turn off your computer. Place the modem in a convenient location, and then connect it to your computer’s serial port, the
telephone line or leased line, AC power, and, optionally, your telephone.
Global Connections
Connections - No Voice
Connections With Voice
Non-Global Connection
PWR RS232 PHONE LINE

Chapter 2 – Installation
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 10
Connect the Modem to Your PC
Plug one end of the serial cable into the RS232 connector on the modem and the other end into a serial port
connector on your computer, such as COM1 or COM2.
Connect the Modem to the Telephone Line
Plug one end of the modular telephone cable into the modem’s LINE jack and the other end into a standard
phone wall jack.
Important: The LINE jack is not interchangeable with the PHONE jack. Do not plug the telephone into the
LINE jack or the line cable into the PHONE jack.
Note: Regulatory agencies may impose certain restrictions on equipment connected to public telephone
systems. For more information, see Appendix A.
Connect the Two-Wire Leased Line (Leased Line Only)
Plug one end of a two-wire telephone cable into the modem’s LINE jack and the other end to a two-wire
leased line wall jack or terminals.
Note: Before you can use the modem on a leased line, you must first change the internal jumpers. See “Step
2: Change the Internal Jumpers.”
Connect the Modem to a Phone (Optional)
If you want to connect a phone to the same line as the modem, plug it into the modem’s PHONE jack.
Important: The PHONE jack is not interchangeable with the LINE jack. Do not plug the telephone into the
LINE jack or the line cable into the PHONE jack.
Connect a Microphone (Voice Option)
For voice mail or speakerphone applications, plug an unamplified microphone into the MIC jack on the side of
the modem. The microphone should have a stereo 1/8-inch mini plug. Do not use a monophonic microphone.
Connect Speakers (Voice Option)
For speakerphone or voice mail applications, use a 1/8-inch mini plug male-to-male stereo patch cord to
connect the SPKR jack on the side of the modem to the LINE IN jack on your sound card. If your sound card
does not have a LINE IN jack, use its MIC jack. The stereo male-to-male patch cord can be purchased at a
local PC retail store.
If you do not have a sound card, you can plug an unamplified speaker directly into the SPKR jack.
Connect the Modem to the AC Power Outlet
The power switch is located on the right side of the modem. Make sure it is set to OFF.
For the global products, plug the universal power supply into the PWR jack on the modem. Then plug one end
of the country-specific power supply cord into the universal power supply and the other end into a power
outlet or power strip.
For Non-global products, plug the power supply lead into the PWR jack on the modem. Plug the transformer
into a power outlet or power strip.
Note: Use only the power supply supplied with the modem. Use of any other power supply voids the warranty
and can damage the modem.
Power-On Test
Test the modem by turning it on. When you turn it on, the modem performs a diagnostic self-test, after which
the 56 indicator should light. If this does not happen, check that the power switch is on, the power supply is
solidly connected, and the AC outlet is live. If these measures do not work, see Chapter 7, “Troubleshooting.”

Chapter 2 – Installation
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 11
Step 3: Install the Modem Driver
If you use Windows 2000 or above, you must install the modem driver. The modem driver tells Windows how to control
the modem. If you use a Linux operating system, please see Appendix D. If you use another operating system, please
refer to its documentation for modem installation information.
Installing the Modem Driver
1. With your computer turned off, ensure that your modem is connected properly, and then turn on your
computer. Upon booting up the computer should detect the modem and open Welcome to the Found
New Hardware Wizard screen. On this screen, select Install from a list or specific location. Click
Next.
2. On the Found New Hardware Wizard screen, check Search for the best driver in these locations and
Install from a specific location. Do Not click Next at this point.
3. Insert the MultiModem product CD into your CD-ROM drive, when the MultiModem main screen appears,
click Exit. Now, click Next on the Found New Hardware screen.
4. On the Found New Hardware Wizard screen, click on Search for the best driver in these locations
and Search removable media. Click Next. Windows installs the modem driver.
5. Click Finish to exit.
For Windows NT, the Install New Modem wizard presents one additional prompt before Step 2. At this
prompt, select Don’t detect my modem; I will select it from a list. Then click Next.
A dialog box with a list of manufacturers and a list of modem models appears. Select your modem. Continue
with Step 2 above.

Chapter 2 – Installation
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 12
Step 4: Configure the Modem for Your
Country or Region – Global Product Only
Different countries have different requirements for how modems must function. Therefore, before you use your modem,
you must configure it to match the defaults of the country/region in which you are using it. You must also do this if you
move the modem to another country/region after it has been configured for the first country/region. You can use one of
two configuration methods:
1. Use the Global Wizard to Configure Your Modem
2. Use AT Commands to Configure Your Modem
Using the Global Wizard to Configure Your Modem
The Global Wizard configuration utility isrecommendedfor computers running Windows 95 or newer.
1. Insert the MultiModem Product CD into the CD-ROM drive. The Autorun menu should appear.
2. Click Initial Setup and Country/Region Selection.
3. Choose either:
Run Global Wizard from CD. This will not load the wizard onto your hard drive, or
Install Global Wizard on the HD. This will install the wizard onto your hard drive for future use.
4. The Global Wizard dialog box appeared. Click Next.
5. The Global Wizard searches for your modem and identifies it. Click Next.
6. Select the country/region in which the modem will be used. Click Next.
7. Review your country/region choice. If it is correct, click Next to configure the modem.
8. When Global Wizard announces that the parameters have been set, click Finish to exit.
Using AT Commands to Configure Your Modem
Non-Windows users can configure the modem using AT commands. You must enter these commands in your
communication program’s terminal window.
1. Run a terminal emulation software.
2. To configure the modem for a specific country/region:
Type AT%T19,0,nn, where nn is the country/region code in hexadecimal notation.
Click ENTER. The message OK displays.
3. To verify that the correct country/region has been configured, type:
ATI9 and click ENTER.
The country/region code displays:
Example: Country/Region AT Command (hexadecimal) Country code (decimal)
Euro/NAM AT%T19,0,34 (default) 52
A list of country/region codes can be found on the Multi-Tech Web site at:
http://www.multitech.com/PRODUCTS/Categories/Modems/global/configurationh.asp#chart
Then click on MultiModemZBA. The Global Modem Country Approvals page displays. On this page you
can view approvals, configuration strings and responses by country and products.

Chapter 2 – Installation
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 13
Step 5: Configure the modem for best
performance
With Micorsoft Operating System, you can configure your modem using HyperTerminal.
Ensure that there are not other applications running that could take control of the com port to which the
modem is connected. Disable fax service and routingt and remote access if running.
To configure your modem, follow these steps:
1. Ensure that the modem serial cable supplied with your modem is connected.
2. In Hyperterminal, select Start I Programs I Accessories I Communications I HyperTerminal.
3. In the Connection Description Name window, enter any name and click OK.
4. In the Connect To dialog, click the down arrow on Connect Using and select Direct to Com Port X when X is
the Com Port connected to your modem. Click OK.
5. In the Com X Properties dialog, select a speed of 115200 in the Bits per second window and leave everything
else at default. Click OK. The TR LED on the modem should light.
6. Now you should be in the HyperTerminal screen. Enter ATE1 and press ENTER. You should get a response of
OK. You are now communicatintg with your modem.
7. To configure your modem, change the modem initialization string, if necessary. The factory default configuration
works well for most purposes. To load the factory default configuration, use AT&F. To load a custom
configuration that was saved using the &Wcommand, use ATZ. For a Macintosh or a device that does not
provide TR, the initialization string should include the &D0 command. If you do not want the modem to always
answer the phone, add S0=0 to the string. To use Caller ID with the modem, add S0=2 and +VCID=1 to the
string (Caller ID information is sent between the first and second rings, so the phone must ring at least twice
before the modem picks up the line). Depending on the software, you might have to end the string with a
carriage return character (^M).
Note: To change the modem’s default configuration, type new commands in the communication program’s
terminal window, adding the &W command to store them in the modem’s nonvolatile memory. For instance, to
create a default configuration that turns off autoanswer, type AT&FS0=0&W. The new configuration loads
automatically whenever the modem is turned on or receives the ATZ command.
Modem Serial Speed Guidelines
If your modem is being used with a terminal with keyboard, set the serial speed to be four times or more higher than the
speed of your modem. This will maximize throughput if compression is enabled.
If you modem is connected to a server or other device without a keyboard, then the serial speed should match the serial
speed of the server’s port. Consult the AT Command Reference Guide for the specific commands.
With Linux disbributions that have Minicom installed, use this application to configure the modem. For more information,
refer to the software manuals and the software’s online help for other configuration choices and for information on how to
use the modem with other communication programs.

Chapter 3 – Operation
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 14
Chapter 3 – Operation
About the Front Panel
The LED indicators on the front panel indicate status, configuration, and activity:
TD – Transmit Data. Flashes when the modem is transmitting data to another modem.
RD – Receive Data. Flashes when the modem is receiving data.
CD – Carrier Detect. Lights when the modem detects a valid carrier signal from another modem. It is on when the
modem is communicating with the other modem, and off when the link is broken.
56 – 56K Mode (56,000–28,000 bps). Lights whenever the modem is set for or connects using the V.90 or V.92 protocol.
The actual connection speed depends on ISP server capabilities and line conditions.
33 – V.34 Mode (33,600–2,400 bps). Lights whenever the modem connects using the V.34 protocol.
14 – V.32bis Mode (14,400–7,200 bps). Lights when the modem connects using the V.32bis protocol. The modem can
connect at lower than V.32bis speeds, but no speed indicator lights during the connection.
OH – Off-Hook. Lights when the modem is off-hook, which occurs when the modem is dialing, online, or answering a
call. Flashes when the modem pulse-dials.
TR – Terminal Ready. Lights when a communications program is using the modem. It means the modem is ready for an
outgoing or incoming call. It goes off when the communications program disconnects the serial port. When it goes
off, a connected modem will also disconnect.
EC – Error Correction (V.42). Lights continuously when the modem is in V.42 error correction mode, and flashes when
compression is activated.
FX – Fax. Lights when the modem is in fax mode.
Note: When you turn on the modem, the protocol indicators flash briefly as the modem does a self-test, after which the
56 indicator lights. After a call, the indicator for the protocol used in the connection remains lit until another call is
made or the modem is reset. If you connect at a rate under 14,400 bps, all protocol indicators remain off after the
connection is broken, even though the modem is still turned on.

Chapter 3 – Operation
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 15
PhoneTools Features
With the PhoneTools communications program included with your modem, you can:
•Upload and download data files.
•Send faxes at preset times.
•Store incoming voice messages and faxes.
•Retrieve stored messages, faxes, and telephone numbers (telephone number retrieval requires Caller ID
service from your telephone company).
•Print a received fax.
For detailed information about operating your modem under PhoneTools, please refer to the PhoneTools online
documentation.
Leased-Line Operation
The MultiModem ZBA modem can be used on a two-wire leased line.
A leased line is a private, permanent telephone connection between two points. Unlike normal dialup connections, a
leased line is always active. The modems automatically connect when they are attached to the line and are turned on.
Because a leased line is always active, one of the two modems on the line must be configured as the originate modem
and the other as the answer modem; however, it does not matter which is which.
In the event of an interruption, leased-line modems automatically reconnect when the data line or power is restored.
Setup
1. Open the modem and change jumper J10 to select leased-line operation, and jumper J11 to select either
originate or answer operation, depending upon how you intend to use the modem. Refer to Chapter 2,
Step 1: Change the Internal Jumpers, for the detailed procedure.
2. Connect a modular telephone cable to the LINE jack. Connect the other end of the cable to a two-wire
lease-line jack or terminals supplied by the telephone company.
3. Turn on the modem.
V.92 Operation
This section describes the status of the V.92 features in the initial release. Please note that the V.92 special features
require connection to a V.92-capable server.
•General. The V.92 protocol is enabled by default. The AT command that controls this is +MS=.
•Commands. AT commands specific to the V.92 protocol and the new V.44 compression protocol begin with the
plus character (+). These commands are in this manual. Also, the S109 register has been modified to support
V.92.
•PCM Upstream. PCM Upstream is disabled by default. To upload files at speeds above 33.6 kbps, you must
enable PCM Upstream using the command +PIG=1. Please note that this requires connection to a V.92-capable
server. Also, please note that since speeds are affected by line conditions, meeting the previous requirements
cannot guarantee speeds above 33.6 kbps.
•Quick Connect. Quick Connect, which shortens the handshake time with another V.92 modem, is disabled by
default. To enable it, use the command +PQC=0. Quick Connect speeds connect times by skipping the line test
during the handshake and using the configuration from the last data connection. Quick Connect works best
when line conditions are consistent from call to call. If line conditions are variable, enabling Quick Connect can
actually increase the connect time slightly.

Chapter 3 – Operation
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 16
Connecting to the Internet
Your Multi-Tech modem is your gateway to the Internet and the World Wide Web. To access the Internet and Web via
your modem, you must establish a dial-up account with an Internet service provider (ISP). To locate an ISP near you,
look in a local directory or computer publication. Your ISP should provide you with the following information:
•User name (also called user ID)
•Password
•Access number (the number you call to connect to the server)
•Host name and/or domain name
•Domain Name Server (DNS) server address
If, besides the Web, you use the Internet for e-mail and newsgroups, your ISP should also provide you with the following
information:
•POP server address
•SMTP address
•News or NNT server address

Chapter 4 – AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 17
Chapter 4 – AT Commands, S-
Registers, and Result Codes
The AT Commands, S-Registers, and Result Codes for the MT5634ZBA-Series Modems are published in a separate
Reference Guide. This guide is included on the MultiModem Product CD. You can open the guide from the CD or you
download the guide to your hard drive and then open it.

Chapter 5 – Remote Configuration
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 18
Chapter 5 – Remote
Configuration
Remote configuration is a network management tool that allows you to configure MT5634ZBA modems remotely from
one location. With password-protected remote configuration, you can issue AT commands to a remote modem for
maintenance or troubleshooting as if you were on site.
Basic Procedure
The following steps can be used when the connection is established by the local or the remote modem.
Note: The remote computer must be running and a communication program must be ready for a data connection, which
will be indicated by a lighted TR indicator on the front of the modem.
1. Establish a data connection with a remote MT5634ZBA modem.
2. Send three remote configuration escape characters followed by AT and the setup password, and press
ENTER. Example: %%%ATMTSMODEM. You have four tries to enter the correct password before being
disconnected. If the password is correct, the remote modem responds with OK.
3. You can now send AT commands to configure the remote modem.
4. When you have finished configuring the remote modem, save the new configuration by typing AT&W0 and
pressing ENTER.
5. Type ATO and press ENTER to exit remote configuration. You can now break the connection in the normal
way.
Setup
Multi-Tech modems are shipped with a default setup password (MTSMODEM). Because anyone who has the User
Guide knows the default setup password, you should change the password and possibly also the remote configuration
escape character. Record your new password and escape character for future reference.
Changing the Setup Password
1. Open a data communications program such as HyperTerminal or PhoneTools.
2. In the terminal window, type AT#SMTSMODEM (or AT#Sxxxxxxxx if you have replaced the
MTSMODEM password with xxxxxxxx) and press ENTER. The modem responds with OK if the setup
password is correct, and ERROR if it is wrong.
3. To change the password, type AT#S=xxxxxxxx, where xxxxxxxx stands for the password, and then
press ENTER. The password can include any keyboard character, and can be up to eight characters long.
The modem responds with OK.
CAUTION: Passwords are case-sensitive. The next time you enter the password, it must be in the same
case as you set it up.
4. The new password is saved automatically. You can now either enter more AT commands or exit the data
communications program. The next time you wish to set up the modem, you must use the new password.
Changing the Remote Escape Character
To further improve security, you can change a remote modem’s remote configuration escape character either
locally or remotely. The remote configuration escape character is stored in register S9. The factory default is 37,
which is the ASCII code for the percent character (%). Setting S9 to 0 (zero) disables remote configuration
entirely.
CAUTION: If you do this remotely, you won’t be able to change it back remotely.
1. Establish a remote configuration link with the remote modem as described in Basic Procedure.
2. Type ATS9=n, where nis the ASCII code for the new remote configuration escape character, and then
press ENTER.
3. Save the new value by typing AT&W and pressing ENTER.
4. Type ATO and press ENTER to exit remote configuration.

Chapter 6 – Callback Security
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 19
Chapter 6 – Callback Security
This chapter describes how to use callback security with your modem. Callback security protects your network from
unauthorized access and helps control long-distance costs. When callback security is enabled, all callers are requested
to enter a password. If a valid password is received, the modem hangs up and returns the call by dialing a phone number
that is stored with the password. The person being called back must then enter the password a second time to establish
a connection.
Up to 30 callback passwords and dialing strings can be stored in the modem. Each dialing string can be up to 34 or 35
characters long and can contain commands as well as phone numbers. For mobile callers, the dialing string can be
programmed to allow the caller to bypass the stored callback number by entering a temporary callback number, to enter
an extension at the callback number, or to make a direct connection without callback.
For local security, the passwords and dialing strings that are stored in the modem are protected from tampering by a
setup password, which you should change when you set up the modem. You can further protect the modem against
tampering by disabling its ability to respond to most AT commands. To check for attempted break-ins, you can request
the modem to display the number of failed password attempts.
Your modem was shipped with a default setup password (MTSMODEM). The same password is used for both callback
security and remote configuration (Chapter 5). Because anyone who has access to this guide has access to the default
password, you should change the password during your initial setup.
Changing the Setup Password
1. Open a data communications program such as HyperTerminal or PhoneTools.
2. In the terminal window, type AT#SMTSMODEM (or AT#Sxxxxxxxx if you have replaced the MTSMODEM
password with xxxxxxxx). Press ENTER. The modem responds with OK if the setup password is correct and
ERROR if it is wrong.
3. To change the password, type AT#S=xxxxxxxx, where xxxxxxxx stands for the new password, and then press
ENTER. The password can include any keyboard character, and can be up to eight characters long. The modem
responds with OK.
4. The new password is saved automatically. You can now either enter more AT commands or exit HyperTerminal
or the data communications program. The next time you wish to set up the modem, you must use the new
password.
CAUTION: Passwords are case-sensitive. The next time you enter the password, it must be in the same case as
you set it up.
Turning Callback Security On and Off
Callback security must be turned on to enter many callback security commands.
1. Open a data communications program such as HyperTerminal or PhoneTools.
2. In the terminal window, type AT#Sxxxxxxxx, where xxxxxxxx is your password. Press ENTER. The modem
responds with OK if the setup password is correct and ERROR if it is wrong.
3. Type one of the following commands:
•To turn off callback security: Type AT#CBS0 and press ENTER. Callers no longer need a password to
connect to the modem, the modem is unable to call them back, and the stored dialing command locations
0–3 become available.
•To turn on both local and remote callback security: Type AT#CBS1.Press ENTER. With local security
turned on, you must enter the setup password before you can enter any AT command except the AT, ATIn,
and AT#Sxxxxxxxx commands. For a description of remote callback security, see the following paragraph.
•To turn on remote callback security only: Type AT#CBS2 and press ENTER. With remote callback
security turned on, each caller is asked to enter a password, is called back, and then is asked to enter the
password again before a connection can be made. Also, dialing command locations 0–3 for use with the
DS=ydialing command are replaced by callback dialing command locations 0–29.
•To temporarily disable callback security if the modem is set to #CBS1 or #CBS2 (for instance, to call
another modem): Type AT#CBS3 and press ENTER. The modem returns to its original setting when you
issue the hangup command (+++ATH) or the modem is reset. Note that if a remote modem breaks the
connection, callback security remains disabled.

Chapter 6 – Callback Security
Multi-Tech Systems, Inc. MT5634ZBA-Series User Guide (S000286G) 20
Setting Callback Security Message Parity
The modem’s parity must match the parity of the computer to which the modem is connected.
1. Open a data communications program such as HyperTerminal or PhoneTools.
2. In the terminal window, type AT#Sxxxxxxxx, where xxxxxxxx is your password. Press ENTER. The modem
responds with OK if the setup password is correct and ERROR if it is wrong.
3. The modem’s parity default value is No parity (AT#CBP0). To change the modem’s default to use even parity,
type AT#CBP2. Press ENTER. For odd parity, type AT#CBP1.Press ENTER.
4. To store the new parity value, type AT&W. Press ENTER.
Assigning Callback Passwords and Phone
Numbers
1. Open a data communications program such as HyperTerminal or PhoneTools.
2. In the terminal window, type AT#Sxxxxxxxx, where xxxxxxxx is your password. Press ENTER. The modem
responds with OK if the setup password is correct and ERROR if it is wrong.
3. Enable callback security by typing AT#CBS1 or AT#CBS2 and pressing ENTER.
4. To store a callback password for the first callback memory location, type AT#CBN0=xxxxxxxx, where xxxxxxxx
is the first password. Press ENTER. The password must be unique, must be six to eight characters in length, and
must not contain a +or -character. The callback password is case sensitive.
5. To store a callback password for the second callback memory location, type AT#CBN1=xxxxxxxx, where
xxxxxxxx is the second password. Press ENTER. Note that the memory location number in the command is
incremented by one.
6. Repeat as many times as necessary, up to memory location 29, until all passwords are entered.
7. To store a callback phone number in the first memory location, type AT&Z0=[+][-]AT(DT or DP)xxxxxxxx[,???],
where xxxxxxxx is the dialing string. Press ENTER. The phone number must be preceded by DT for tone dialing
or DP for pulse dialing. The dialing string can also include other AT commands.
Example: AT&Z0=+-ATM0DT5551212. Up to 35 characters can be used. The +, -, and ??? characters are
optional:
+Number entry. Enables a mobile caller to enter his current phone number for callback.
-Direct connection. Enables a caller to choose direct connection without being called back.
,??? Extension entry. Must be used with the +command. Enables a caller to enter an extension number for
callback. The number of ?characters must equal the number of digits in the extension.
8. To store a callback phone number in the second memory location, type AT&Z1=[+][-]AT(Dt or
DP)xxxxxxxx[,???], where xxxxxxxx is the dialing string, and press ENTER. Note that the memory location
number in the command is incremented by one.
9. Repeat, through memory location 29, until all dialing strings are entered.
10. To review your entries, type AT&V and press ENTER.
Note: A form is provided on the last page of this chapter to help you plan or keep track of password and phone
number assignments.
Calling Procedures
Use the following procedures to call a modem that has callback security enabled. Note that Autoanswer must be enabled
on the calling modem (S0=1).
Password-Only Callback
Use this procedure when calling from a fixed location.
1. Using a data communications program such as HyperTerminal or PhoneTools, dial the number of the
callback modem.
2. When the connection is established, the callback modem responds with the following message:
Password>
3. Type the password corresponding to the phone number for your modem. Press ENTER.You have three
attempts or one minute to enter a valid password.
4. If the password is valid, the following message appears, and the modems disconnect:
OK Disconnecting