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Chapter 1 - Description and Specifications
Multi-Tech Systems, Inc. MultiModem CDMA User Guide 4
Chapter 1: Description and Specifications
Product Description
The Multi-Tech MultiModem CDMA 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 CDMA2000 1x 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 CDMA is based on industry-standard open interfaces, and can be desktop or panel mounted.
Package Contents
Basic Package
• one modem
• two holding bridles (mounting brackets)
• one fused power cable
• one Quick Start Guide
Bundled Package
• All Basic Package items except the fused power cable, plus
• one RS232 15-to-9 pin cable
• four adhesive-backed rubber feet for table-top mounting
• one antenna
• one universal power supply with power cord
• one product CD
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)
Parts to be Supplied by End User
• Mounting screws (screw shaft diameter = .17” max.)
• Antenna
• The Wireless MultiModem is shipped with an antenna suited for it. However, 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.
Antenna/RF Specifications
CDMA 800 CDMA 1900
Frequency
824 to 894 MHz 1850 to 1990 MHz
Impedance
50 ohms
VSWR
<1.5
Typical Radiated
Gain
0 dBi on azimuth plane