Multitech MultiModem ZBA USB MT5634ZBA-USB User manual

Model MT5634ZBA-USB
Data/Fax Modem
User Guide

User Guide
Model MT5634ZBA-USB
PN 88310001 Revision B
Copyright ©1998, by Multi-Tech Systems, Inc.
All rights reserved. This publication may not be reproduced, in whole or in part, without prior expressed written
permission from Multi-Tech Systems, Inc.
Multi-Tech Systems, Inc. makes no representations or warranties with respect to the contents hereof and
specifically disclaims any implied warranties of merchantability or fitness for any particular purpose. Furthermore,
Multi-Tech Systems, Inc. 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
A8/1/98 Manual released.
B3/3/00 Added software driver install procedure in Windows 2000 operating systems
and new AT commands.
Trademarks
MultiModemZBA, Multi-Tech, and the Multi-Tech logo are trademarks of Multi-Tech Systems, Inc.
IBM is a trademark of International Business Machines Corporation.
MNP and Microcom Network Protocol are trademarks of Microcom, Inc.
K56flex is a registered trademark of Rockwell International Corporation and Lucent Technologies Corporation.
Microsoft, Windows, Windows 2000, Windows 98, Windows 95, and Windows NT are either registered
trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.
Notice
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.
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, MN 55112 U.S.A
[phone] or [phone]
US.. Fax [phone]
Technical Support [phone]
InternetAddress http://www.multitech.com

iii
Contents
Chapter 1 - Introduction and Description
Introduction ................................................................................................................................................ 6
Product Description.................................................................................................................................... 6
Universal Serial Bus (USB) ........................................................................................................................ 6
What Can You Do with Your Modem? ........................................................................................................ 7
Features ..................................................................................................................................................... 7
Data ..................................................................................................................................................... 7
Fax....................................................................................................................................................... 8
Required Equipment ............................................................................................................................ 8
Computer ............................................................................................................................................. 8
Telephone Line..................................................................................................................................... 8
Communications Software ................................................................................................................... 8
Connections ............................................................................................................................................... 9
Connecting to the Computer (“USB”)................................................................................................... 9
Connecting to the Telephone Line (“LINE”).......................................................................................... 9
Connecting to a Telephone Set (“PHONE”) .........................................................................................9
Surge Protectors and Lightning ........................................................................................................... 9
Front Panel............................................................................................................................................... 10
Technical Specifications ............................................................................................................................11
Chapter 2 - Installation
Unpacking ................................................................................................................................................ 14
What You Will Need ................................................................................................................................. 14
Safety Warning Telecom .......................................................................................................................... 14
Step 1:Assemble the Modem .................................................................................................................. 15
Step 2: Connect the Modem to Your System ........................................................................................... 16
USB Connection ................................................................................................................................ 16
Line Connection ................................................................................................................................. 16
Phone Connection ............................................................................................................................. 16
Step 3: Install the Modem......................................................................................................................... 17
Installation in Windows 2000 ............................................................................................................. 17
Installation in Windows 98 ................................................................................................................. 18
Installation in Windows 95 ................................................................................................................. 18
Removing Your Old Modem from Windows ....................................................................................... 19
References............................................................................................................................................... 19
Chapter 3 - AT Commands, S-Registers and Result Codes
AT Commands.......................................................................................................................................... 22
AT Command Summary ........................................................................................................................... 23
S-Registers .............................................................................................................................................. 32
Result Codes............................................................................................................................................ 35
Chapter 4 - Remote Configuration
Introduction .............................................................................................................................................. 38
Basic Procedure....................................................................................................................................... 38
Setup........................................................................................................................................................ 38
Changing the Setup Password .......................................................................................................... 38
Changing the Remote Escape Character .......................................................................................... 39

Chapter 5 - Troubleshooting
Introduction .............................................................................................................................................. 42
None of the Indicators Light ............................................................................................................... 42
The Modem Does Not Respond to Commands ................................................................................. 42
The Modem Dials But Cannot Connect ............................................................................................. 43
The Modem Disconnects While Online..............................................................................................44
The Modem Cannot Connect WhenAnswering................................................................................. 44
The Modem Doesn’t Work with Caller ID ...........................................................................................44
Fax and Data Software Can’t Run at the Same Time ........................................................................ 44
Appendixes
AppendixA: RegulatoryAgency Compliance ........................................................................................... 46
Class B Statement ............................................................................................................................. 46
FCC Part 15....................................................................................................................................... 46
Industry Canada ................................................................................................................................ 46
FCC Part 68 Telecom......................................................................................................................... 47
FAX Branding Statement ................................................................................................................... 48
Canadian Limitations Notice: ............................................................................................................. 48
Commission Decision "CTR21" ......................................................................................................... 48
EMC, Safety and Terminal Directive Compliance .............................................................................. 49
New Zealand Telecom Warning Notice ..............................................................................................49
International Modem Restrictions ...................................................................................................... 49
Appendix B - V.90 Support ....................................................................................................................... 50
Introduction ........................................................................................................................................ 50
V.90 Troubleshooting ......................................................................................................................... 50
Appendix C: Loopback Tests.................................................................................................................... 51
Introduction ........................................................................................................................................ 51
LocalAnalog Loopback Test (V.54 Loop 3)........................................................................................51
Appendix D: Warranty, Service, and Technical Support ........................................................................... 54
Technical Support .............................................................................................................................. 55
About the Internet .............................................................................................................................. 55
Dial-Up Networking............................................................................................................................ 55
Windows 98/95 Dial-Up Networking .................................................................................................. 56
Windows 2000 Dial-Up Networking ................................................................................................... 59
About OrderingAccessories .............................................................................................................. 62
Software User LicenseAgreement .................................................................................................... 63
Index
iv

Chapter 1 - Introduction and Description

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MultModemUSB User Guide
Introduction
Welcome to the world of data communications. You have acquired one of the finest intelligent data
and fax modems available today from one ofAmerica’s oldest and most respected modem
manufacturers: Multi-Tech Systems, Inc. This owner’s manual will help you install, configure, test and
use your modem.
Product Description
The MT5634ZBA-USB modem incorporates V.90™ technology, which enables Internet connections at
data rates up to 53K bps* over standard telephone lines. V.90 technology is able to send data
downstream from the Internet to your computer at these speeds because data on the telephone
network typically is converted from digital to analog only once before it reaches your modem.
Upstream transmissions, and transmissions between client modems, are limited to data rates of
33.6K bps, as are downstream transmissions that are converted more than once on the telephone
network.
The MT5634ZBA-USB is Plug and Play-capable, with interactive automatic dialing and command
mode configuration. In standard mode, you can store up to four command lines or telephone
numbers of up to 40 characters each in the modems’ nonvolatile memory. The modem pulse- or tone-
dials, and recognizes dial tones and busy signals for reliable call-progress detection. The modem can
detectAT&T calling card tones. It also has Caller ID, remote configuration and incorporates self-
resetting lightning protection. The MT5634ZBA-USB is FCC-registered for connection without
notification to the telephone company.
The MT5634ZBA-USB is a full-duplex intelligent modem with V.42 error correction, V.42bis data
compression, and V.17 (14,400 bps), Class 1 and 2, Group 3 fax capabilities.
Universal Serial Bus (USB)
Universal Serial Bus (USB), defined by a consortium of industry leaders, permits connection of
multiple low-speed and medium speed computer peripheral devices such as telephones, modems,
printers, keyboards, mice, and scanners; all from a single personal computer port. The specification,
based on an open architecture is quickly becoming a standard feature in new desktop and notebook
computers.
* Although K56flex technology is capable of downloads of up to 56K bps, FCC regulations currently
restrict ISP modems to downloads of 53K bps.

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Chapter 1 - Introduction and Description
What Can You Do with Your Modem?
Your Multi-Tech MultiModem is the gateway to the exciting world of telecommunications.
You can use it to access commercial on-line information services such as CompuServe, America
Online, Genie, and Prodigy. These services provide access to databases, encyclopedias, stock
reports, news, weather, and shopping. They provide electronic mail (e-mail) links to subscribers of
the same and other services. Public message areas called forums allow subscribers to trade
information and opinions on a vast array of topics fromA to Z, while vendor forums provide hardware
and software support from Multi-Tech and other manufacturers. Online services also allow you to
upload and download computer programs, data files, and updated software such as video and printer
drivers.
Your modem can also connect you to the Internet, an international computer network of universities,
libraries, businesses, and government agencies. Like the commercial online services, the Internet
provides e-mail services, public message areas, and access to information and software, much of it
easily accessed through the World Wide Web.
Other uses include direct links to colleagues with modems, to banks, and to service bureaus. You can
also telecommute with your fax modem—work at home while communicating with the office by
modem or fax.
And of course, you can use your modem to exchange faxes with any fax machine in the world,
enabling you to communicate quickly with businesses and organizations that do not have direct
modem communications.
Features
• Compliance with major ITU-T, TIA, and EIAinternational standards to ensure compatibility
with other modems.
• Caller ID capability can identify a caller’s phone number (available only on U.S. products).
• Limited warranty: Ten years
Data
• Supports the V.90 standard for data transmission speeds up to 56K bps while maintaining
compatibility with lower-speed modems.
• Supports the enhanced ITU-T V.34 standard, with data transmission speeds to 33.6K bps.
• Supports asynchronous data rates at 56K, 33.6K, 31.2K, 28.8K, 26.4K, 24K, 21.6K, 19.2K,
16.8K, 14.4K, 12K, 9600, 4800, 2400, 1200, and 300 bps.
• Supports automatic fallback to slower speeds in noisy line conditions, and fall-forward to
faster speeds as conditions improve.
• ITU-T V.42 LAP-M and MNP Class 3 and 4 error correction.
• ITU-T V.42bis (4-to-1) and MNP 5 (2-to-1) data compression.
• Automatically disables data compression when transferring already-compressed files.
• Autodial, redial, pulse (rotary) and touch-tone dial.
• Dial tone and busy signal detection for reliable call-progress reporting.
• Compatible with the standardAT command set used by most communication programs.

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MultModemUSB User Guide
Fax
• Supports V.17, Group 3 fax communication standards, allowing it to communicate with other
fax modems as well as with fax machines.
• Responds to EIA/TIA Class 1 and 2 fax commands, enabling it to exchange editable and
encrypted faxes with Windows 95 computers.
• Sends and receives faxes from your computer at 14,400 bps, 9600 bps, 7200 bps, 4800 bps,
2400 bps, or 300 bps.
Required Equipment
In addition to the contents of your modem package, you need the following equipment.
Computer
Your modem can only be connected to a computer with a USB port.
Telephone Line
You must have a telephone line with jack (connector) that accepts the cable that comes with the
modem. If you do not have a telephone jack near your computer, you should install one before
proceeding.
Do-it-yourself telephone extension kits and accessories are available wherever telephones are sold.
You may also hire an independent contractor or your local telephone company to install an extension.
If you want a separate line for your fax modem, you must contact your telephone company.
Communications Software
To operate your modem, you must have data communications and fax communications software
(included with the modem). Data communications software simplifies control of the modem by guiding
you through the process of selecting your serial port, your port speed, and other variables, and then
storing your settings, including frequently called phone numbers, so they can be recalled with the
stroke of a key or the click of a mouse. Data communications software must be set up, or configured,
before you can use it.

9
Chapter 1 - Introduction and Description
Connections
To use your modem, you must connect it to your computer (“USB”), to a telephone line (“LINE”), and
optionally to a telephone set (“PHONE”).
PHONE LINE
USB
Figure 3-1. USB and communications connectors.
Connecting to the Computer (“USB”)
Using a USB cable, connect the USB connector on the modem to a USB connector on the back of
your computer.
Connecting to the Telephone Line (“LINE”)
Plug one end of the cable provided with the modem into the telephone jack in your home or office.
Plug the other end into the LINE jack on the modem.
Note: 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: The Federal Communications Commission (FCC), Industry Canada, and other regulatory
agencies impose certain restrictions on equipment connected to public telephone systems. See
AppendixAfor more information.
Connecting to a Telephone Set (“PHONE”)
If you wish to connect a telephone to the same line as the modem, you can plug it into the modem’s
PHONE jack. This connector is provided as a convenience; you can also connect your telephone to a
duplex jack inserted into your wall jack.
Note: 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.
Surge Protectors and Lightning
Your modem has self-resetting lightning protection to protect it from electrical spikes on the telephone
line. During an electrical storm, your safest course is to unplug your computer equipment from both
the power outlet and the telephone line.

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MultModemUSB User Guide
Front Panel
Figure 3-3. Front panel
The MT5634ZBA-USB has 6 LED indicators on the front panel that indicate status, configuration, and
activity:
TD
Transmit Data. The TD LED flashes when the modem is transmitting data to another modem.
RD
Receive Data. The RD LED flashes when the modem is receiving data from another modem.
CD
Carrier Detect. The CD LED 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.
OH
Off-Hook. The OH LED lights when the modem is off-hook, which occurs when the modem is
dialing, online, or answering a call. The LED flashes when the modem pulse-dials.
TR
Terminal Ready. The TR LED lights when Windows detects and initializes the modem.
Power. The PWR led lights when the system is applying power to the modem.

11
Chapter 1 - Introduction and Description
Technical Specifications
Your MultiModemZBA-USB fax modem meets the following specifications:
Trade Name MultiModemUSB™
Model Number MT5634ZBA-USB
Client-to-Server K56flex speeds when accessing an ISP type K56flex server
Data Rates (actual speed depends on server capabilities and line conditions) *
Client-to-Client 33,600, 31,200, 28,800, 26,400, 24,000, 21,600, 19,200,
Data Rates 16,800, 14,400, 12,000, 9600, 7200, 4800, 2400, 1200, 0-300 bps
Fax Data Rates 14,400, 9600, 7200, 4800, 2400, 300 bps
Data Format Serial, binary, asynchronous
Modem Compatibility K56flex; ITU-T V.34 enhanced, V.34, V.32terbo, V.32bis, V.32, V.22bis,
V.22; Bell 212A and 103/113; ITU-T V.29, V.42, V.42bis; ITU-T V.21 &
V.23 in international versions
Fax Compatibility ITU-T Group 3, Class 1 and 2, T.4, T.30, V.21, V.27ter, V.29, V.17, and
TIA/EIA TR29.2
Error Correction ITU-T V.42 (LAP-M or MNP 3–4)
Data Compression ITU-T V.42bis (4:1 throughput), MNP 5 (2:1 throughput)
Flow Control XON/XOFF (software), RTS/CTS (hardware)
Intelligent Features Plug and play; fully AT command compatible; autodial, redial, repeat
dial; pulse or tone dial; dial pauses; auto answer; caller ID; 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; on-screen
displays for modem option parameters; command lines of up to 40
characters each; help menus; remote configuration;
Command Buffer 40 characters
Data Modulation FSK at 300 bps, PSK at 1200 bps, QAM at 2400, 4800, and 9600 bps
(non-trellis), QAM with trellis-coded modulation (TCM) at 9600,
12,000, 14,400, 16,800, 19,200, 21,600, 24,000, 26,400, 28,800,
31,200, 33,600, and 56,000 bps
Fax Modulation V.21 CH2 FSK at 300 bps (half duplex)
V.27ter DPSK at 4800 and 2400 bps
V.29 QAM at 9600 and 7200 bps
V.17TCM at 14400, 12000, 9600, and 7200 bps
Carrier Frequencies 1600, 1646, 1680, 1800, 1829, 1867, 1920,
ITU-T V.34 1959, 2000 Hz
Carrier Frequencies 1800 Hz
AT&T V.32 terbo/
ITU-T V.32bis/V.32
Carrier Frequencies Transmit originate: 1200 Hz
V.22bis/V.22 or Transmit answer: 2400 Hz
Bell 212A Standard Receive originate: 2400 Hz
(2400 & 1200 bps) Receive answer: 1200 Hz
Carrier Frequencies Transmit originate: 390 Hz mark
ITU-T V.23 450 Hz space
(1200 bps) Receive originate: 1300 Hz mark
2100 Hz space

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MultModemUSB User Guide
Transmit answer: 1300 Hz mark
2100 Hz space
Receive answer: 390 Hz mark
450 Hz space
Carrier Frequencies Transmit originate: 980 Hz mark
ITU-T V.21 1180 Hz space
(0–300 bps) Receive originate: 1650 Hz mark
1850 Hz space
Transmit answer: 1650 Hz mark
1850 Hz space
Receive answer: 980 Hz mark
1180 Hz space
Carrier Frequencies Transmit originate: 1270 Hz mark
Bell 103/113 1070 Hz space
(0–300 bps) Receive originate: 2225 Hz mark
2025 Hz space
Transmit answer: 2225 Hz mark
2025 Hz space
Receive answer: 1270 Hz mark
1070 Hz space
Fax Carrier V.21 Ch2 (half duplex):
Frequencies 1650 Hz mark, 1850 HZ space for transmit originate
1650 HZ mark, 1850 Hz space for transmit answer
V.27ter: 1800 Hz originate/answer
V.29 QAM: 1800 Hz originate/answer
V.17 TCM: 1800 Hz originate/answer
Transmit Level -11 dBm (dial-up)
Frequency Stability ±0.01%
Receiver Sensitivity -43 dBm under worst-case conditions
AGC Dynamic Range 43 dB
Connectors USB connector; two RJ-11 phone jacks
Cables One 7-foot RJ-11 phone cable
One 4-foot USB cable
Note: Any cables connected to the computer should be shielded to
reduce interference.
Diagnostics Power-on self test, local analog loop, local digital loop, remote digital
loop.
Indicators LEDs for Transmit Data, Receive Data, Carrier Detect, Off Hook,
Terminal Ready, Power
Environmental Temperature range 0°–50°C (32°–120°F); humidity range 20–90%
(non-condensing)
Dimensions 10.8 cm wide x 14.8 cm long x 2.9 cm high (4.25"x 5.8"x 1.15")
Weight 224 g (8 oz)
Limited Warranty 10 years

Chapter 2 - Installation

14
MultiModemUSB User Guide
Unpacking
We know you are eager to get your Multi-Tech fax modem up and running, so we’ll skip the features
for now, and show you step-by-step how to set it up, check it out, and make your first calls.
What You Will Need
Before starting, please make sure you have everything you need:
We supply
•An MT5634ZBA-USB data/fax modem
•One set of four plastic feet
•Two sets of hook-and-loop fasteners
•One modular telephone cable
•One USB cable
•Trio communications software
•A Quick Start Guide
•This User Guide on disk
•An installation disk
You supply
•A computer with an unused USB port
•A nearby telephone line jack
If you are new to computers, see “Chapter 3 - Features,” for more information about the required
equipment.
Safety Warning Telecom
1. Never install telephone wiring during a lightning storm.
2. Never install a telephone jack in wet locations unless the jack is specifically designed for wet
locations.
3. This product is to be used with UL and cUL listed computers.
4. Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.
5. Use caution when installing or modifying telephone lines.
6. Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a
remote risk of electrical shock from lightning.
7. Do not use a telephone in the vicinity of a gas leak.
8. To reduce the risk of fire, use only 26AWG or larger telecommunication line cord.

15
Chapter 2 - Installation
Step 1: Assemble the Modem
The only assembly required is to mount the feet on the bottom of the modem. Simply peel the four
self-adhesive plastic feet off the backing strip and press them into the recesses on the bottom of the
modem.Alternately, or additionally, you can use the included self-adhesive hook-and-loop patches to
mount the modem to a vertical surface or to keep it from being dislodged on a horizontal surface. If
you use the hook-and-loop patches, we recommend that you mount them where they will not obscure
the labels or screws on the bottom of the modem.
Figure 2-1. Mounting the feet.

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MultiModemUSB User Guide
Step 2: Connect the Modem to Your System
Placing the modem in a convenient location, connect it to your computer’s USB port, to the telephone
line, and, optionally, to your telephone.
PHONE LINE
USB
Figure 2-3. Modem connections.
USB Connection
Plug one end of the USB cable into the USB connector on the modem, and the other end into a USB
port connector on your computer.
Line Connection
Plug one end of the phone cable into the modem’s LINE jack, and the other end into a phone line wall
jack.
Note: The LINE jack is not interchangeable with the PHONE jack. Do not plug the phone into the
LINE jack or the line cable into the PHONE jack.
Note: The Federal Communications Commission (FCC), and Industry Canada impose certain
restrictions on equipment connected to public telephone systems. See Appendix Afor more
information.
Phone Connection
For voice-only calls, you can optionally plug a telephone into the modem’s PHONE jack.

17
Chapter 2 - Installation
Step 3: Install the Modem
The MT5634ZBA-USB software drivers need to be installed in your computer’s program directory.
The procedure will be different depending on the operating system. This section provides installation
procedures for Windows 2000, Windows 98, and Windows 95.
Installation in Windows 2000
1. Power up your Windows 2000 system.
2. If you have not already done so, connect one end of your USB cable to a USB connector on your
PC, and connect the other end to the USB connector on your modem. The Power LED on your
modem will light.
3. Windows 2000will detect that the new modem is present and install the software drivers. Two
screens will appear during the installation process.
Screen 1
Screen 2
4. Once Screen 2 disappears, your MT5634ZBA-USB driver software installation is complete. You
should test the operation of your new MT5634ZBA-USB by registering your MT5634ZBA-=USB
product now. Key in the URL given below and follow the on-line instructions:
http://www.multitech.com/register

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MultiModemUSB User Guide
Installation in Windows 98
1. Power up your Windows 98 system.
2. If you have not already done so, connect one end of your USB cable to a USB connector on your
PC, and connect the other end to the USB connector on your modem. The Power LED on your
modem will light.
3. Windows will detect that the new modem is present and launch the Add New Hardware Wizard.
4. Place the Installation diskette provided with your modem into your floppy drive and click Next to
proceed with the installation.
5. Verify that the “Search for the best driver for your device. (Recommended)” option is selected
and click Next.
6. Verify that the “Floppy disk drives” option is selected and click Next.
7. Windows will select the proper driver from the installation disk and will display the information for
verification. Click Next to install the selected driver.
8. Amessage will appear when Windows finishes installing the driver. Click Finish to complete the
installation and exit the wizard. The TR LED on your modem will light when the installation is
complete.
9. Once installation is complete, you should test the operation of your new MT5634ZBA-USB by
registering your MT5634ZBA-USB product now. Key in the URL given below and follow the on-
line instructions:
http://www.multitech.com/register
Installation in Windows 95
Only Certain versions of Windows 95 offer support for USB peripherals. If you are unsure if your
Win95 system supports USB, a free USB evaluation utility is available from the Shopping Bag page
at http://www.usb.org. Just download the utility (287K) and run the .exe application. It will determine if
you have USB support.
If you would like to install your MT5634ZBA-USB in Windows 95, perform the following steps.
1. Insert the Setup disk provided with your modem into your floppy drive.
2. If you have not already done so, connect one end of your USB cable to a USB connector on your
PC, and connect the other end to the USB connector on your modem. The Power LED on your
modem will light.
3. Windows will detect that the new modem is present and launch the Update Device Driver
Wizard. Click Next to proceed with the installation.
4. Windows searches for the driver onA:\ and, when identified, will display the driver name for
verification. Click Finish to install the driver.
5. Windows prompts you to insert a diskette. You have already inserted the diskette, so click OK to
continue. The Copy Files ... dialog is displayed. In the Copy files from field, choose A:\ from the
drop-down list and click OK.
6. When the driver is installed, a completion message will appear, the TR LED on your modem will
light, and the wizard will exit.At this time your installation is complete.
7. Once installation is complete, you should test the operation of your new MT5634ZBA-USB by
registering your MT5634ZBA-USB product now. Key in the URL given below and follow the on-
line instructions:
http://www.multitech.com/register

19
Chapter 2 - Installation
Removing Your Old Modem from Windows
When your new modem replaces another modem, the old modem installation remains in Windows
after you install the new modem, and the old modem is still selected in HyperTerminal and other
Windows applications.Although you can change the application connection descriptions one at a
time, it is easier to force Windows applications to use the new modem by removing the old modem
from Windows.
From Windows 2000
1. Click Start | Settings |Control Panel.
2. Double-click the Phone and Modems icon and click on the Modems tab.
3. In the list box, select the old modem.
4. Click Remove, then click Close.
5. The next time you dial a HyperTerminal connection, it will select your new modem and ask you to
confirm the selection.
From Windows 98/95
1. Click Start | Settings |Control Panel.
2. Double-click the Modems icon to open the Modems Properties sheet.
3. In the list box, select the old modem.
4. Click Remove, then click Close.
5. The next time you dial a HyperTerminal connection, it will select your new modem and ask you to
confirm the selection.
References
The World Wide Web is an excellent source of information about modems in general and modem
installation, configuration, and troubleshooting in particular. The following Web sites are good places
to start:
• Costmo’s Other Resources Page:
http://modems.rosenet.net/or/
• Curt’s High Speed Modem Page:
http://elaine.teleport.com/~curt/modems.html
• Data Communications FAQ:
http://www.best.com/~malch/comfaq.html
• Multi-Tech Systems, Inc.:
http://www.multitech.com/

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MultiModemUSB User Guide