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LZT 123 7263 R1C
1. Introduction
1.1 Target Users
GM47 and GM48 modules are designed to be integrated into machine-
to-machine or man-to-machine communications applications. They are
intended to be used by manufacturers, system integrators, applications
developers and developers of wireless communications equipment.
1.2 Prerequisites
It is assumed that the person integrating the GM47 or GM48 into an
application has a basic understanding of the following:
• GSM networking;
• Wireless communication and antennas (aerials);
• AT commands;
• ITU-T standard V.24/V.28;
• Micro controllers and programming;
• Electronic hardware design.
1.3 Manual Structure
The manual is composed of four parts:
Part 1- Overview
This section provides a broad overview of the GM47/GM48 family and
includes a list of abbreviations used in the manual.
Part 2 - Developer’s Kit
This section lists the contents of the whole development kit and
provides the information to setup and use the equipment.
Part 3 - Integrating the Module
This section describes each of the signals available on the GM47/GM48
modules, along with mechanical information. The section also provides
you with design guidelines and explains what is needed to
commercialise an application from a regulatory point of view.