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Chapter 1 – Introduction
Multi-Tech Systems, Inc. MT5656ZDX User Guide 4
Chapter 1
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Introduction
Congratulations on your purchase of the Multi-Tech MT5656ZDX-Series modem.
• The Multi-Tech MT5656ZDX modem is your data/fax modem.
• The MT5656ZDX-V offers your voice option.
You have acquired one of the finest intelligent data/fax or voice/data/fax modems available today from one of
the world’s oldest modem manufacturers: Multi-Tech Systems, Inc. This user guide will help you install,
configure, test, and use your modem.
Product Description
The Multi-Tech MT5656ZDX and MT5656ZDX-V modems are compatible with the ITU-TV.92 protocol that
provide quick connections, downstream transmissions at speeds up to 56K bps, and upstream transmissions at
speeds up to 48K bps when connected to V.92-compatible Internet Service Providers. The V.92 protocol is
able to send downstream from the Internet to your computer at these speeds because data on the telephone
network typically is converted from digitial to analog only one before it reaches your modem. Upstream
transmissions and transmissions between client modems are limited to 33.6K bps, as are upstream
transmissions that are converted more than once on the telephone lines.
Modem features include Plug and Play operation. In standard mode, the modem can store up to four
command lines or telephone numbers of up to 40 characters each in nonvolatile memory. Other modem
capabilities include modem-on-hold, AT&T calling card tone detection, pulse and tone dialing, adaptive answer,
V.42bis and V.44 data compression, and self-resetting lightning protection.
Please note that some V.92 features are turned off in the factory default configuration, and may need to be
turned on, depending on your needs.