CM-42 Technical Description
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SEM/CX-02:0076/DES A
2 Integrating The CM-42 Module
2.1 Overview
The CM-42 is a dual band CDMA/AMPS 800 and CDMA 1900 MHz transceiver module. It is designed for
consumer and OEM industrial voice and data applications.
The CM-42 module is intended for mounting into an application developer’s chassis to provide wireless
communication capability for the product. The target chassis may take a wide variety of forms such as a residential
electric meter, a point of sale terminal, an alarm panel, or an automobile console. All initial configuration, mode
control, and operational commands are issued to the CM-42 module over an RS-232 serial port using a flexible AT
command format, as described in the AT Command section of this document.
Figure 1: CM-42 Mechanical Drawing
2.2 Mechanical Description
The CM-42 has no mechanical elements other than the main PCB assembly. All critical electronic components are
shielded using sheet metal cans to prevent internal and external electromagnetic interference from degrading the
module’s performance and to prevent the module from interfering with other nearby devices. The module is plugged
into the fixed mating connector and secured with 8 screws to the standoff posts.
The module has no keypad, display, microphone, speaker or battery. The physical dimensions of the CM-42
module are as indicated in the figure shown below.
Note!
All the measurements are in millimeters.
