Altec Analog Socket Modem AL2094S User Manual
Page 5
AL2094S Designers Guide
Doc. No. DG_2094E
Altec Electronic AG
Seite 5 / 30
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1.1 Overview
Altec’s AL2094S Socket Modem Family provides the OEM with a complete V.92, V.34 and
V.32bis data/fax/voice modem in a compact socket-mountable DIL-40 module. This designer's
guide describes the modem hardware. AT commands and S registers are defined in the AT
Command Reference Manual.
The compact size and high level of integration of the Socket Modem minimizes real estate and
cost for motherboard and box modem applications. Its low power consumption makes it ideal
for portable applications such as pocket modems or laptop, notebook and palmtop computers,
and for a wide variety of embedded control applications. The pin compatibility between the full
range of AL Series Socket Modems, ISDN and GSM Socket Modems allows upgrading and
production configurability without hardware changes.
Data compression (V.44/V.42 bis/MNP 5) and error correction (V.42/MNP 2-4) modes are
supported to maximize data throughput and data transfer integrity. V.44 is a more efficient
data compression than V.42 bis that significantly increases downstream throughput thus
reducing the download time for the types of files associated with Internet use, such as Web
pages and uncompressed files such as graphics, image, audio, and document files. V.44 data
compression can achieve compression rates of more than 25% over V.42bis. Typical
compression ratio for V.44 on Web type data is approximately 6-1 resulting in overall effective
data throughput rate up to 300 kbps for a 56 kbpsconnection. Non-error-correcting mode is
also supported.
In V.22 bis fast connect mode, the modem can connect at 2400 bps with a very short training
time, which is very efficient for small data transfers.
The SmartDAA system-powered DAA operates reliably without drawing power from the line,
unlike line-powered DAAs which operate poorly when line current is insufficient due to long
lines or poor line conditions. Enhanced features, such as monitoring of local extension status
without going off-hook, are also supported.
CX86500