Multitech MT1932ZDX, MT1932ZDXK, MT2834ZDXI, MT1932ZDXI, MT1932ZDX-Mac Quick Reference Manual

Quick Reference Guide

Quick Reference Guide

P/N 82027808 Revision I (12/15/97)

MT1932ZDX, MT1932ZDXI, MT1932ZDXK, MT1932ZDX-Mac

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 ©1997, 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. 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.

Record of Revisions

Revision Description

I Manual revised to reflect editorial changes. All pages at

(12/15/97) Revision I.

Trademarks

Trademarks of Multi-Tech Systems, Inc. are as follows:

MultiModem, MultiModem II, MultiModemZDX, MultiModemµ, MultiExpress,

MultiExpressFax, Multi-Tech, and the Multi-Tech logo.
IBM is a trademark of International Business Machines Corporation.
Macintosh is a registered trademark of Apple Computer, Inc.
MNP, Microcom Network Protocol, is a trademark of Microcom, Inc.
ProComm Plus is a registered trademark of Datastorm Technologies, Inc.
Windows is a registered trademark of Microsoft in the U.S. and other countries.

Multi-Tech Systems, Inc.

2205 Woodale Drive

Mounds View, MN 55112 U.S.A

[phone] or [phone]

Fax [phone]

Fax-Back [phone]

Technical Support [phone]

BBS [phone] or [phone]

Internet http://www.multitech.com

Tech Writer: [e-mail]

Contents

Chapter 1 - Introduction

Congratulations .....................................................................................6

What Is in My Modem Package? .........................................................7

Chapter 2 - Quick Start

Introduction............................................................................................8

What You’ll Need...................................................................................8

Safety Warnings ....................................................................................9

Step 1: Assemble the Modem ..............................................................9

Step 2: Connect the Modem to Your System ....................................10

RS232 Connection...................................................................... 11

LINE Connection......................................................................... 11

PHONE Connection ....................................................................11

POWER Connection ................................................................... 11

Power-On Test ............................................................................12

Step 3: Install the Modem in Windows 95 .........................................13

Adding the MT1932ZDX to Windows 95....................................13

Removing Your Old Modem from Windows 95..........................14

Step 4: Install and Configure Your Software......................................15

Third Party Communications Software ......................................15

Step 5: Call the Multi-Tech BBS .........................................................17

Windows 95 HyperTerminal........................................................17

Windows Terminal.......................................................................18

Running MultiModemZDX Help..................................................20

Chapter 3 - Features

What Can I Do with My MultiModemZDX? ........................................21

Features ..............................................................................................22

Required Equipment ...........................................................................23

Computer.....................................................................................23

Serial Cable.................................................................................23

iii

Telephone Line............................................................................23

Communications Software..........................................................24

Connections ........................................................................................2 4

Connecting to the Computer (“RS232”) .....................................2 5

Connecting to the Telephone Line (“LINE”) ...............................25

Connecting a Telephone Set (“PHONE”) ...................................25

Connecting to Power (“POWER”) ..............................................26

Surge Protectors and Lightning..................................................26

Front Panel..........................................................................................2 7

Chapter 4 - AT Commands, S-Registers and Result
Codes

AT Commands.....................................................................................29

S-Registers..........................................................................................48

Result Codes.......................................................................................51

Chapter 5 - Troubleshooting

Introduction..........................................................................................52

None of the LEDs Light When the Modem Is On......................53

The Modem Does Not Respond to Commands ........................53

The Modem Dials But Cannot Make a Connection ...................56

The Modem Disconnects While Online......................................57

The Modem Cannot Connect When Answering ........................58

File Transfer Is Slower Than It Should Be .................................58

I Am Losing Data ........................................................................59

I Am Getting Garbage Characters on the Monitor.....................60

My Fax and Communications Software Won’t Run at the

Same Time .................................................................................6 0

Appendix A - Regulatory Information

Single-User Software License Agreement .........................................61

FCC Regulations for Telephone Line Interconnection.......................64

Canadian Limitations Notice...............................................................67

Compliance with BABT Requirements ...............................................68

Modem CE Mark EMC and Safety Compliance ................................71

iv

Appendix B - Technical Specifications
Appendix C - Service, Warranty and Tech Support

Limited Warranty .................................................................................76

On-line Warranty Registration ............................................................77

Service.................................................................................................7 7

Tech Support .......................................................................................77

The Multi-Tech BBS ............................................................................78

Logging on to the Multi-Tech BBS .............................................7 8

Downloading a File .....................................................................78

Reading a Message ....................................................................80

Leaving a Message.....................................................................80

Bulletins.......................................................................................80

About CompuServe.............................................................................8 0

About the Internet ...............................................................................81

About the Multi-Tech Fax-Back Service .............................................81

Multi-Tech Systems, Inc. Reader Response Form ............................8 2

v

6

MT1932ZDX Quick Reference Guide

Chapter 1 - Introduction

Congratulations

Congratulations on your purchase of the MT1932ZDX fax modem, one of
the finest fax modems available today from one of America’s oldest and
most respected modem manufacturers. The MT1932ZDX complies with
the international V.32terbo standard for a top speed of 19,200 bits per
second (bps). It is downward compatible with all previous standards,
including V.32bis (14,400 bps), V.32 (9600 bps), V.22bis (2400 bps), and
V.22 (1200 bps). It is a full-duplex intelligent modem with V.42 error
correction, V.42bis data compression, and V.17 (14,400 bps), Class 2,
Group 3 fax capabilities.

This reference guide is for the MT1932ZDX (standard), MT1932ZDX-Mac
(Macintosh), MT1932ZDXK (UK), and MT1932ZDXI (international) versions
of the modem. Except where specifically noted, references to the
MT1932ZDX should be understood to apply to all versions, whereas
references to the ZDX, ZDX-Mac, ZDXK, and ZDXI refer to specific
versions.

In addition to this

Quick Reference Guide

, which you received with your

modem, a complete

Owner’s Manual

is available for the MultiModemZDX

series of modems. The

Owner’s Manual

provides more detailed information
on the operation of your modem, including full descriptions of all AT
commands. It also provides a glossary of terms, and chapters on modem
basics, configuring, and testing. To order it, please see the Reader
Response Form at the end of this guide.

The complete

Owner’s Manual

is also available as a free Windows Help
file. You will find instructions for downloading it from the Multi-Tech BBS
on pages 17-20 of this guide. With the Windows Help version on your
computer, help is never more than a few clicks away.

7

Chapter 1 - Introduction

What Is in My Modem Package?

Your MT1932ZDX package has several components. Make sure you have
them all before trying to operate your modem. Your package should
include:

• One MT1932ZDX data/fax modem

• One DC power supply

• One set of four plastic feet

• Two sets of Velcro fasteners

• One telephone cable

• This

Quick Reference Guide

• Communications (datcomm) software

• A brochure with a warranty registration card

If any of these items are missing, please contact Multi-Tech Systems or
your dealer/distributor (see Appendix C for information on contacting Multi­Tech via telephone, fax, bulletin board service, CompuServe, and the
Internet).

8

MT1932ZDX Quick Reference Guide

Chapter 2 - Quick Start

Introduction

We know you’re eager to get your Multi-Tech MultiModemZDX fax modem
up and running, so we’ll skip the features for now, and show you step-by­step how to set it up, check it out, and make your first calls.

What You’ll Need

Before starting, please make sure you have everything you need:

We supply

•

The MT1932ZDX data/fax modem

•

A DC power supply module

•

One set of four plastic feet

•

Two sets of Velcro fasteners

•

One 14-foot telephone cable

•

Communications (datacomm) software

•

This

Quick Reference Guide

•

A brochure with a warranty registration card

You supply

•

A computer with an unused serial port

•

A shielded RS-232 serial cable with a male DB-25 connector on
one end and a connector to match your computer’s serial port on
the other end

•

A nearby AC power outlet

•

A nearby telephone line jack

If you are unfamiliar with computers, please see Chapter 3, “Features,” for
more information on the required equipment before you proceed.

9

Chapter 2 - Quick Start

Safety Warnings

• 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 (other than a cordless type) during an
electrical storm; there may be a remote risk of electrical shock
from lightning.

• Do not use a telephone in the vicinity of a gas leak.

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 Velcro patches to
mount the modem to a vertical surface or to keep it from being dislodged
on a horizontal surface. If you use the Velcro patches, we recommend that
you mount them where they will not obscure the labels on the bottom of the
modem.

Figure 2-1. Mounting the feet.

10

MT1932ZDX Quick Reference Guide

Step 2: Connect the Modem to Your System

Placing the MT1932ZDX in a convenient location, connect it to your
computer’s serial port, to the telephone line, to AC power, and, optionally,
to your telephone (the ZDXK and ZDXI models do not have a telephone
jack).

✳

#

Figure 2-2. ZDX connections.

11

Chapter 2 - Quick Start

u RS232 Connection

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.

u LINE Connection

Plug one end of the phone cable into the MT1932ZDX’s LINE jack, and the
other end into a phone line wall jack.

Note: The ZDX's 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), Industry Canada,
and the British Approvals Board for Telecommunications (BABT) impose
certain restrictions on equipment connected to public telephone systems.
See Appendix A for more information.

u PHONE Connection

You may optionally plug a telephone into the ZDX’s PHONE jack. This jack
is provided as a convenience; you may also plug a telephone into a duplex
jack inserted into your wall jack. The ZDXK and ZDXI models do not have
a PHONE jack.

u POWER Connection

Plug the power supply module into an AC power outlet or power strip. Plug
the power supply’s cable into the POWER jack on the modem.

Note: Use only the power supply supplied with the MT1932ZDX. Use of
any other power supply will void the warranty and could damage the
modem.

12

MT1932ZDX Quick Reference Guide

u Power-On Test

Test the modem by turning it on (a power on/off switch is located on the
right side). When you apply power, the modem performs a diagnostic self­test, indicated by the speed indicators flashing in sequence for a second
or two, after which the 28 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 5,
“Troubleshooting Your Fax Modem.”

13

Chapter 2 - Quick Start

Step 3: Install the Modem in Windows 95

If you are using Windows 95, you must install the modem in the operating
system. (If you are using another operating system, you may skip this
step.)

Adding the MT1932ZDX to Windows 95

1. Click the Start button, point to Settings, and click Control Panel.

2. Double-click the Modems icon. If no modem is currently installed, the
Install New Modem wizard appears. If a modem is already installed,
the Modems Properties sheet appears; click Add to go to the Install
New Modem wizard.

3. Click Next in the Install New Modem wizard. Windows searches for
your new modem and asks you to verify its selection.

Note: If Windows cannot find a modem, your modem may be turned
off, it may be plugged into the wrong connector on your computer, or
the serial cable may be faulty. See “None of the LEDs Light When the
Modem Is Turned On” and “The Modem Does Not Respond to
Commands” in Chapter 5, “Troubleshooting Your Fax Modem.”

4. If Windows identifies your modem correctly as a MultiTech MultiModem
or a MultiModem MT1932ZDX, click Next to install the modem. After
the modem is installed, click Finish to exit.

5. If Windows cannot identify your modem (for instance, if it identifies
your modem as a “Standard Modem”), click Change. A dialog box with
a list of manufacturers and a list of modems appears.

6. Select “MultiTech Systems” from the Manufacturers list box, then
select “MultiModem MT1932ZDX” from the Models list box.

7. Click Next. Windows installs and configures the modem.

8. Click Finish to exit.

14

MT1932ZDX Quick Reference Guide

Removing Your Old Modem from Windows 95

When your MT1932ZDX 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 95
applications. Although you can change the application connection
descriptions one at a time, it is easier to force Windows 95 applications to
use the MT1932ZDX by removing the old modem from Windows.

1. Click the Start button, point to Settings, and click 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.

15

Chapter 2 - Quick Start

Step 4: Install and Configure Your Software

You must have communications software installed in your computer to use
the MT1932ZDX. If you wish to use communications software that is
already installed, you should reconfigure it for the MT1932ZDX; otherwise,
install the data and fax communications software provided with the
MT1932ZDX (see software documentation for installation instructions).

Third Party Communications Software

1. Turn on your computer and run your communications software.

2. Find the dialog box or menu that lets you specify your modem. (In
Windows Terminal, select Settings, Modem Commands; in
HyperTerminal, select File, Properties, Phone Number; in ProComm
Plus for Windows, select Window, Setup, Advanced.)

3. Choose the Multi-Tech MultiModemZDX or MT1932ZDX from the
software’s modem list. If the MultiModemZDX isn’t listed, choose
another Multi-Tech modem, such as the MultiModemII.

4. Change the modem initialization string, if necessary. In most
circumstances, AT&FX4S0=0 works best for a PC, and
AT&FX4&E13&D0S0=0 works best for a Macintosh. For CompuServe,
include &E0&E14S7=60 in the string; if you use WinCIM, include &E5
for WinCIM’s software flow control. If you want the modem to always
answer the phone, delete S0=0 from the string. Depending on the
software, you may have to end the string with a carriage return (^M).

Note: To change the modem’s default initialization string, type the
new commands in the software’s terminal window, adding the
command &W0 to store it in the modem’s nonvolatile memory; e.g.,
AT&FX4S0=0&W0.

5. Select the port the modem is connected to (normally COM1 or
COM2).

16

MT1932ZDX Quick Reference Guide

6. Ideally, if you use data compression, you should set your serial port
baud rate to four times the modem’s maximum transmission speed or
faster; however, not all serial ports can handle speeds that high. Set
the serial port baud rate to 115,200 bps if your computer has a high
speed serial port with a 16550AFN UART or equivalent and Windows
95; set it to 57,600 bps if it has Windows 3.1x. If you have an older
computer with a 16450 UART, set it to 19,200 bps. Older Macintosh
computers can use a serial port baud rate of 57,600 bps, and newer
ones, 115,200 bps.

To see what UART is in your serial port if you have Windows 3.1x,
select File, Run in Program Manager, type MSD, and press RETURN.
Select COM Ports to see the UART type. If you have Windows 95,
select Start, Settings, Control Panel, and double-click on the Modems
icon. In the Modems Properties dialog box, click the Diagnostics tab,
click the port the modem is connected to, and click More Info to see
the UART type. Note: Both programs may identify a 16450 UART as
an 8250A UART. If you have an 80386 or later computer, your UART
is most likely a 16450 or 16550AFN. (For more information about
serial port problems and UARTs, download ZDXHELP.HLP from the
Multi-Tech BBS or CompuServe forum.)

7. If the software has an autobaud selection, make sure it is disabled.
Autobaud applies only to older modems, and can cause problems if
enabled.

8. If the software allows you to edit the no-connect messages (

NO

CARRIER, BUSY, NO ANSWER, NO DIALTONE

), make sure there

is no space between

DIAL

and

TONE

in

NO DIALTONE

.

9. Refer to the software manual or online Help for other configuration
choices; in most cases you can accept the default values.

17

Chapter 2 - Quick Start

Step 5: Call the Multi-Tech BBS

Test the modem’s data functions by calling the Multi-Tech Bulletin Board
System (BBS) and downloading ZDXHELP.HLP, which contains the full

MultiModemZDX Owner’s Manual

in convenient Windows Help format.

Windows 95 HyperTerminal

1. Click Start; then choose Programs, Accessories, and HyperTerminal.

2. Start HyperTerminal by double-clicking on the Hypertrm icon.
HyperTerminal asks for the name of the connection.

3. Type Multi-Tech BBS in the Name text box and click OK.

4. In North America, type 800 in the Area Code box and 392-2432 in the
Phone Number box. Local and international users, type 612 in the
Area Code box and 785-3702 in the Phone Number box.

5. In the Connect Using drop-down list box, select “Multitech MultiModem”
or “MultiModem MT1932ZDX”, then click OK.

6. In the Connect dialog box, click Dialing Properties.

7. Make any necessary changes in the Where I Am and the How I Dial
from This Location boxes. If you must dial 9 to access an outside line,
you should type 9 in both the local and the long distance boxes unless
your phone system has a special requirement.

8. Click OK, then click Dial. You will know you have reached a modem
by the harsh sounds of the modem handshake.

9. When the BBS welcome screen appears in the HyperTerminal
window, type your first name, last name, and password following the
prompts. If you are a first-time caller, the BBS asks if your name is
spelled correctly. If you answer Y, a questionnaire appears. You must
complete the questionnaire to use the BBS on your first call.

10. Press RETURN until the Main Menu appears (answer N to any
Newsletter or Bulletins questions for now). From the Main Menu you
have access to three main areas: the Files Menu, the Message Menu,
and Bulletins. For help with menu commands, type ?.

18

MT1932ZDX Quick Reference Guide

11. In the Main Menu, type F and press RETURN to access the Files
Menu, then type D and press RETURN to download.

12. At the prompt, type zdxhelp.hlp, then press RETURN twice.

13. Answer Y or N to the automatic logoff question.

14. Type Z and press RETURN to select the Zmodem transfer protocol.

15. The download begins automatically. As the file is copied to the
HyperTerminal folder, a dialog box reports on the progress of the
download. If the download fails, your baud rate may be set too high.
Log off, set the COM port baud rate lower, and call again.

16. To log off the BBS if you answered N in step 13, press RETURN, type
G for “good-bye,” and press RETURN twice more.

17. In the HyperTerminal window, click File, Save to save the
HyperTerminal Connection description.

Windows Terminal

1. Open the Accessories program group and double-click on the Terminal
icon.

2. Select the Settings menu and make the following changes:

Phone Number:

Type 1-800-392-2432 if you are in North America, or
an overseas access code and 612-785-3702 if you are outside North
America.

Communications:

Select the COM port the modem is connected to
and change the following: Baud Rate to 19200; Flow Control to
Hardware; and Carrier Detect to checked.

Modem Commands:

Select MultiTech. If you must dial 9 to get an
outside line, type ATDT9, in the Dial Prefix text box (include the
comma).

3. Click File, Save and save as multibbs.trm. Click OK.

4. Click Phone, Dial to dial the BBS. You will know you have reached a
modem by the harsh sounds of the modem handshake.

19

Chapter 2 - Quick Start

5. When the BBS welcome screen appears, type your first name, last
name, and password following the prompts. If you are a first-time
caller, the BBS asks if your name is spelled correctly. If you answer
Y, a questionnaire appears. You must complete the questionnaire to
use the BBS on your first call.

6. Press RETURN until the Main Menu appears (answer N to any
Newsletter or Bulletins questions for now). From the Main Menu you
have access to three main areas: the Files Menu, the Message Menu,
and Bulletins. For help with menu commands, type ?.

7. From the Main Menu, type F and press RETURN to access the Files
Menu, then type D and press RETURN to download.

8. At the prompt, type zdxhelp.hlp, then press RETURN twice.

9. Answer Y or N to the automatic logoff question.

10. Type X and press RETURN to select the Xmodem transfer protocol.

11. To begin the download in Terminal, click Transfers, Receive Binary
File; select the destination directory, type the file name (zdxhelp.hlp),
and click OK to begin the transfer. If the download fails, your baud rate
may be set too high. Log off, set the COM port baud rate lower, and
call again.

12. To log off the BBS if you answered N in step 9, press RETURN, type
G for “good-bye,” then press RETURN twice again.

20

MT1932ZDX Quick Reference Guide

Running MultiModemZDX Help

Windows 95

1. Open the folder into which you downloaded the ZDXHELP.HLP file.

2. Move the file to a permanent location on your hard drive.

3. Double-click on the Zdxhelp icon to run MultiModemZDX Help.

4. Press F1 for help in using MultiModemZDX Help.

Windows 3.x

1. Open the directory into which you downloaded the ZDXHELP.HLP
file.

2. Move the file to a permanent location on your hard drive.

3. In File Manager, select ZDXHELP.HLP, then click on File, Associate.

4. In the Associate With text box, type WINHELP.EXE, then click OK.

5. Double-click on the ZDXHELP.HLP file name to run it.

6. To create an icon for easier access to MultiModemZDX Help, drag the
ZDXHELP.HLP file name from File Manager into any Windows
program group, such as Main.

21

Chapter 3 - Features

Chapter 3 - Features

What Can I Do with My MultiModemZDX?

Your MT1932ZDX is the gateway to the exciting world of
telecommunications.

You can use it to access commercial online 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 from
A 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.

The MT1932ZDX 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.

You can also use the MT1932ZDX to dial into bulletin board services
(BBS’s). BBS’s offer some of the services provided by online information
services—usually e-mail, public message areas, and file transfers. Most
are run as hobbies by individuals, but some are services provided by
companies like Multi-Tech. Though some charge an annual fee, many are
free.

Other uses include direct links to friends 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.

22

MT1932ZDX Quick Reference Guide

And of course, you can use your MT1932ZDX to send and receive faxes
anywhere in the world, enabling you to communicate quickly with businesses
and other organizations that do not maintain BBS’s.

Features

The MT1932ZDX automatically adjusts to line conditions and to the
capabilities of the modem it connects to, resulting in the highest transmission
speed, the most accurate error correction, and the most efficient data
compression possible for each connection. The MT1932ZDX follows the
AT&T V.32terbo specification for data rates as high as 19,200 bps over
public telephone lines.

The MT1932ZDX’s features include:

• Support of data rates of 19,200, 16,800, 14,400, 12,000, 9600,

7200, 4800, 2400, 1200, and 300 bps for communicating with
older modems as well as with other V.32terbo modems.

• 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 Classes 2–4 error correction.

• Data transfer rates up to 76,800 bps with V.42bis data

compression.

• Serial port data rates adjustable to 115,200 bps.

• Autodial, redial, pulse (rotary) and touch-tone dial.

• Dial tone and busy signal detection for reliable call progress

reporting.

• Compatibility with the standard AT command set used by most

communication programs.

• On-screen help menus.

• Nonvolatile memory for storage of custom settings and two

telephone numbers.

• Sends and receives faxes from your computer at 14,400, 9600,

7200, 4800, and 2400 bps.

• Responds to EIA TR29.2 Class 2 fax commands.

23

Chapter 3 - Features

Required Equipment

In addition to the contents of the MT1932ZDX package, you need the
following equipment.

u Computer

The MT1932ZDX can be connected to any computer with an RS-232C/
V.24 serial port, such as the IBM PC, XT, AT, and PS/2 computers, and
most PC compatibles. It can also be connected to the RS-422 serial ports
on Apple Macintosh computers. To use your MT1932ZDX at its highest
speeds, a PC must have either a serial port with a 16550AFN UART or a
Multi-Tech ISI (Intelligent Serial Interface) card, such as the ISI551 (single
port), ISI552 (dual port), or the ISI608 (eight ports). A 16550AFN UART can
safely handle data at rates up to 115,200 bps. Almost all Macintoshes can
handle data rates up to 57,000 bps, while the newer ones can handle data
rates up to 115,000 bps.

u Serial Cable

To connect the MT1932ZDX to your computer, you must provide a serial
cable, obtainable at computer stores and many office supply stores. The
cable should have a male DB-25 connector at the modem end. For IBM and
compatible computers, the other end may have a female DB-25 connector
or a female DB-9 connector, depending on your computer. Most Macintosh
computers require a round, 8-pin, mini-DIN connector. The Macintosh
serial cable should be wired for hardware flow control. To reduce electrical
interference, the FCC requires that the cable be shielded.

u Telephone Line

You must have a telephone line with a jack (connector) that accepts the
cable that comes with the MT1932ZDX. If you do not have a telephone jack
near your computer, you should install one before proceeding.

24

MT1932ZDX Quick Reference Guide

In North America, 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 do the work. If
you want a separate line for your fax modem, you must contact your
telephone company.

u Communications Software

To operate the MT1932ZDX, you must have data communications
(datacomm) and fax communications software. Except for the ZDX-Mac,
all versions come with a data and fax communications package. You must
have Microsoft Windows 3.1 or later to run this software. If you require
software for DOS or for the Macintosh operating system, please contact
Multi-Tech Sales at [phone] or 1-800-328-9717, or by fax at (612)
785-9874. The MT1932ZDX is also compatible with other datacomm and
fax programs.

Connections

All models connect to your computer (“RS232”), to a telephone line
(“LINE”), and to a power source (“POWER”). Only the ZDX model may be
connected directly to a telephone set (“PHONE”).

Figure 3-1. ZDX connectors.

25

Chapter 3 - Features

u Connecting to the Computer (“RS232”)

Using a matching serial cable, connect the RS232 connector on the
modem to one of the serial port connectors on the back of your computer.
On an IBM PC or compatible, there are usually two serial ports named
“COM1” and “COM2.” COM1 typically uses a DB-9 connector, whereas
COM2 may use a DB-25 connector. Most Apple Macintosh computers use
round mini-DIN-8 connectors for the serial ports. Choose the one marked
with the icon of a telephone; the Macintosh gives priority to that port and
will not interrupt your communications link. Be sure to tighten the mounting
screws on the DB connectors.

u Connecting to the Telephone Line (“LINE”)

Plug one end of the cable provided with the MT1932ZDX into the telephone
jack in your home or office. Plug the other end into the LINE jack on the
MT1932ZDX.

Note: The ZDX's 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 the British Approvals Board for Telecommunications (BABT) impose
certain restrictions on equipment connected to public telephone systems.
See Appendix A for more information.

u Connecting a Telephone Set (“PHONE”)

If you wish to connect a telephone to the same line as the ZDX, you may
plug it into the latter's PHONE jack. This connector is provided as a
convenience; you may also connect your telephone to a duplex jack
inserted into your wall jack. The ZDXK and ZDXI models do not have a
PHONE jack.

Note: The PHONE jack is not interchangeable with the LINE jack; do not
plug the telephone into the LINE jack or vice-versa