User Manual

GM47/48 Technical description
BA/SEM/MS 02:0004 Rev B
5
1 Introduction
1.1 Overview
The GM47/48 belong to a new generation of Sony Ericsson Mobile
Communications GSM modules. This document describes the main
characteristics and functionality of the GM 47/48, two dual band
products for 900/ 1800 MHz and 850/1900 MHz GSM bands
respectively.
They are intended to be used in both machine-to-machine applications
and man-to-machine applications. The module serves its purpose
when there is a need for sending and receiving data (by SMS, CSD,
HSCSD, or GPRS), as well as making voice calls over the GSM
network.
GM47/48 are business-to-business products. It is intended to be sold
to manufacturers, system integrators, applications developers-
developing solutions with wireless communication. The module is
intended to be integrated by the system integrator within an
application. The module and the external application will form a
system for wireless communication.
A typical system is one where a micro controller in an external
application communicates with the module over its serial interface.
The micro controller will control the module, via the supported set of
AT commands. It is assumed that the system integrators have a high
technical knowledge and the ability to integrate the module into a
system. For the GM47/48 modules some interesting applications are
the following:
• Fleet and Asset Management
• Vending Machines
• Security and Alarm
• Other telemetry applications