MultiModemDSVD User Guide 1 Introduction

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Introduction
Congratulations on your purchase of your MultiModemDSVD! You have acquired
not only one of the finest intelligent data, fax, and voice modems available, but a
modem that can transmit voice and data at the same time. This user guide will
help you to install, configure, test, and use your modem.
Product Description
The MultiModemDSVD modem incorporates both the ITU-T V.90 and the K56flex™
protocols, both of which enable Internet connections at data rates up to 53K bps*
over standard telephone lines. Using these protocols, Internet service providers
(ISPs) are able to send data downstream to your computer at high speeds because
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 transmis-
sions that are converted more than once on the telephone network.
The MultiModemDSVD offers interactive automatic dialing and command mode
configuration. You can store up to four command line/telephone numbers of up to
40 characters each in the modem’s nonvolatile memory. The modem pulse or tone
dials, and recognizes dial tones and busy signals for reliable call-progress detection.
The modem can also detect AT&T calling card tones. It is FCC-Registered for con-
nection to telephone networks without notification to the telephone company.
Digital simultaneous voice and data (DSVD) operation allows data transfer and
voice conversation to occur simultaneously during a data connection. On a DSVD
call, a headset or microphone and speaker can be used as the voice interface. Both
local and remote modems must have compatible DSVD technology to support the
DSVD function. The MultiModemDSVD is compatible with the industry-standard
ITU-T V.70 DSVD specification.
Features

General

•Complies with major ITU-T, TIA, and EIA international standards to ensure com-
patibility with other modems.
•Distinguishes data, fax, or voice calls using DTMF and tone detection with soft-
ware packages supporting these features.
•Supports serial port speeds to 230.4K bps with compatible serial ports
•On U.S. products, includes Caller ID to identify your caller’s phone number.
*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.