Chapter 1 – Description & Specifications
Multi-Tech Systems, Inc. MultiModem GSM/GPRS User Guide 5
Chapter 1: Product Description andSpecifications

Product Description

The Multi-Tech MultiModem GSM/GPRS is an external data/fax/voice wireless modem. It also supports mobile
originated short message service (SMS) and mobile-terminated SMS. Designed for global use, it offers standards-
based multi-band GSM/GPRS Class 10 performance. This ready-to-deploy, standalone modem allows developers to
add wireless communication to products with a minimum of development time and expense. The MultiModem
GSM/GPRS is based on industry-standard open interfaces, is fully type approved, and can be desktop or panel
mounted.

Package Contents

Basic Package
one modem
two holding bridles (mounting brackets)
one fused power cable
Bundled Package
All Basic package items except the fused power cable, plus
one RS232 15-to-9 pin cable
one antenna
four adhesive-backed rubber feet for table-top mounting
one universal power supply with power cord
one product CD
one Quick Start Guide

Interfaces

The Wireless MultiModem has several interfaces:
LED function indicating operating status
External antenna (via SMA connector)
Serial and control link (via 15 pins SUB D)
Power supply (via 2.5mm miniature power jack)
SIM card holder

Parts to be Supplied by Wireless Service Provider

Subscriber Identity Module (SIM) configuration chip
The SIM contains information specific to your wireless account and its features.

Parts to be Supplied by End User

mounting screws (screw shaft diameter = .17” max.)
antenna (Basic Package)
The bundled Wireless MultiModem is shipped with an antenna suited for it. If the antenna supplied does
not meet your application requirements (for size, shape, mounting style, etc.), you must supply an
antenna yourself. In general, the antenna used must be both of the correct frequency and of a style
appropriate to the application. See the Antenna/RF Specifications section below.