User's Manual

Note: Locate an analog telephone line. Many offices have digital telephone lines, which will not
work with a modem.
Warning: Do not connect your modem to a digital telephone line. Modems are designed for use only
with analog telephone lines; connecting to a digital telephone line may damage the modem.
Verify that the line is analog before connecting.
Fax machines use analog telephone lines. If you can't find an analog voice line, find a fax machine
and use its line.
1 - INTRODUCTION
Congratulations on your purchase of this outstanding Fax/Data Modem. This manual describes how to
operate your new Fax/Data Modem.
Instructions for installing your Fax/Data Modem will be found in the Installation Manual, while the
information in this manual, deals exclusively with the operation of the modem after it is installed, such as
the command set, the internal configuration registers, troubleshooting and testing.
Features:
These Fax/Data Modems combine the features of a 56000(receive only)/33600/28800/14400/9600 bps data
modem and a 14400/9600 bps FAX modem. Your new Fax/Data Modem gives your personal computer the
ability to send and receive FAX messages over the telephone line like a standard FAX machine. Your
Fax/Data Modem also allows your PC to communicate with other personal computers, terminals or BBS's
(Bulletin Board Systems) through the data modem functions.
When used as a data modem your Fax/Data Modem uses the standard AT command set and is fully
compatible with ITU-T V.42, V.42bis, V.34 (ANNEX 12), V.32bis, V.32, V.22bis, V.23, V.22, V.21,
MNP 2-5, Bell 103, 212A, K56flex and/or V.90. When used as a Fax/Data Modem it communicates with
all ITU-T Group 3 FAX machines and is compatible with ITU-T V.27ter and V.29, V.17, T.4 and T.30.
Switching between DATA mode operation and FAX mode operation of your Fax/Data Modem is done
through its firmware, no hardware settings are required.
If you are already familiar with the use of a modem and the Hayes AT command set, this modem will be
extremely easy for you to use. Just read the installation procedures in the installation manual and you are
ready to begin operation. If you are new to modem communications, we recommend that you read through
this manual first. If you come across terms that you don't understand, consult the glossary. Words in
boldface type are command names, commands, or default settings. Carriage returns (Enter) are noted with
<CR> or [ENTER]; this does not mean to enter these characters literally; but instead to press the Enter key.
The communication software, which should be used, depends on the kind of machine that you are going to
communicate with. If you are going to call a FAX machine then you must use the Fax software. If the
machine that you are going to communicate with is a modem then you must use a data modem
communications software.
Note: This manual is written to be used for several models of Fax/Data Modems. Some of the
information in this manual may not apply to your fax/data modem.
All the description in this manual about Caller ID, V.90 and Fax class 2 applies only to the models
which support these functions.