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ModemModule Developer’s Guide
MT3334SMI6
Introduction
The MT3334SMI socket modem provides a fully-integrated data and fax communications design for
communications over wide area networks using dial-up phone lines and the Internet.
This guide provides the Service Class 1 standard defining the commands that the developer can use
to configure and control a fax/data modem and the responses (result codes) that the fax/data modem
issues in response to the commands. This guide also provides the developer with specific Class 2 fax
command protocol used to control the sending and receiving of faxes.
Product Description
The MT3334SMI is a standard 64-pin Socket Modem (Figure 1-1 illustrates the MT3334SMI in
relationship to Multi-Tech’s Demo board) used for integrating data and fax communications. It
provides:
• Low power consumption
• A serial TTL level interface
• Full-featured fax and datacomm operation
• A very small footprint for embedded applications
LED 4
LED 3
LED 2
LED 1
DS1
J4
J5
J3
J6
J1
S1
J7
J2
Figure 1-1. MT3334SMI and Demo Board
Features
• Complete fax / modem solution: includes the controller, data pump, and DAA
• Modem downloads at 33.6 Kbps via enhanced V.34 server and uploads at 33.6 Kbps
(enhanced V.34)
• Supports V.42 error correction with V.42bis or MNP Class 5 data compression
• Supports industry-standard AT-style commands
• Standard TTL serial interface supporting DTE transfer speeds to 230.4 Kbps
• Remote configuration, diagnostic tests, Distinctive Ring, 3-number storage for automatic
dialing, and Flash memory for firmware updates.
• Includes NOVRAM for stored parameters