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MultiModemII User Guide
2
Introduction
Congratulations on your purchase of the MultiModemII modem. You have acquired
one of the finest intelligent data/fax modems available today from one of the
world’s oldest modem manufacturers: Multitech Systems, Inc. This user guide will
help you install, configure, test and use your modem.
Product Description
The MultiModemII MT5600BA and MT5600BL modems incorporate new modem
technologies called K56flex
™
and V.90, both of which enable Internet connections at
data rates up to 53K bps* over standard telephone lines. These protocols are able to
send data downstream to your computer at high speeds by taking advantage of the
fact that data on the telephone network normally 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.
Both models support two-wire leased line operation. The MT5600BL model also
supports four-wire leased line operation with dial backup and automatic leased line
restoral. Please note that, because leased line operation consists of two client mo-
dems connected to each other, the maximum leased line data rate is 33.6K bps.
The MultiModemII offers interactive automatic dialing. You can store four command
lines or telephone numbers of up to 30 characters each in the modem’s nonvolatile
memory. The modem pulse- or tone-dials, and recognizes dial tones and busy sig-
nals for reliable call-progress detection. It can also detect AT&T calling card tones. It
is FCC-registered for connection to telephone networks without notification to the
telephone company.
The MultiModemII front panel includes a liquid crystal display and four buttons
that together can be used to display the current connection status of the modem or
to configure the modem. The MultiModemII also can be configured through stan-
dard AT commands.
Features
General
• Complies with major ITU-T, TIA, and EIA international standards to ensure com-
patibility with other modems.
• Uses DTMF and tone detection to distinguish data and fax calls when used with
software that supports these features.
• Supports serial port speeds to 230.4K bps with compatible serial ports
• Supports Caller ID (North American versions only).
• Displays status and configuration information on a front panel LCD.
*Though this modem is capable of 56K bps download performance, line impairments, public
telephone infrastructure, and other external technological factors currently prevent maxi-
mum 56K bps connections.