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MultiModemBL User Guide
1.1 Introduction
Welcome to the world of data communications. You have acquired one of the finest intelligent
desktop data/fax modems available today, the MultiModem
II
BL series modem, from Multi-Tech
Systems. This User Guide covers various models within the BL series, and unless otherwise noted,
all content should be considered relevant to all models.
Your MultiModem provides data communication at the following rates:
Model
MT2834BL Series
MT1932BL Series
MT1432BL Series
Baud Rate
33,600 - 14,400 bps (*Enhanced V.34/V.32bis)
19,200 - 14,400 bps (V.32terbo/V.32bis)
14,400 - 300 bps (V.32bis)
*Note enhancements on V.34 code (33.6K/31.2K) is awaiting formal ITU approval; the ITU study group 14 has agreed on
the technical side of the proposal, with formal approval expected at the next ITU meeting in Geneva.
The MultiModem also provides other prevalent data communications standards and includes dial
backup with automatic lease line restoration, adaptive protocol enhancing used in typical Unix® batch
file transfers and support for IBM's AS/400
TM
and Windows
TM
environments.
1.2 How To Use This Manual
This manual is divided into ten chapters. While viewing in Acrobat ReaderTM you can click on blue
text to jump to the section of the manual it references. Red, bold text indicates a hyperlink to the
Internet. If you have a Web browser active on your system, click on these text links to open the
browser and go to the referenced site. The information contained in each chapter and appendix is as
follows:
Chapter 1 - Introduction and Description
This chapter begins with a short introduction, followed by a guide (which you are now reading) to the
use of this manual. There is a discussion about what components you can expect in your modem
package. We then provide a more detailed description of the modem, including the modem’s
technical specifications. Chapter 1 includes sections covering power, LED indicators and a brief
summary of PC board controls. (Chapter 9 covers switch settings more thoroughly.)
Chapter 2 - Installation and Connection
Chapter 2 covers the procedure for connecting the modem to your computer and to the phone line.
Details are given, supported by illustrations on the modem's back panel connections as a guide to
install your modem to the point of operation. In addition, this chapter guides you through the
installation of Trio, the communications software included with your modem.
Chapter 3 - Software Configuration and Modem Basics
Chapter 3 documents communication software configuration recommended specifically for the
MultiModem. Other issues covered include setting up initialization strings, changing default
parameters, configuring software for the remote system and file transfer protocols.
Chapter 4 - Manual Dial and Automatic Answer
Chapter 4 covers some modem operations, but delays discussion on Command Mode operation until
Chapter 5. Automatic Leased Line Restoration, Dial backup, Manual Dial Mode, and Answer Mode
operation are covered in detail, as well as the handshaking procedures employed between two
modems in an auto-answer application.