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LZT 123 7263 R1C
1. Introduction to AT Commands
1.1 Overview
AT commands, issued from a computer in your application are used to
control and implement the functions of the module.
Using AT commands, the following actions are possible:
• Control of DCE
•GPRS
• Call control
• Supplementary Service
• SIM application tool kit
The GM47 contains a large number of Ericsson-specific commands in
addition to those implemented in accordance with the GSM and ITU-T
recommendations. These commands are provided to enhance the
functions of the module. The Ericsson-specific commands are identified
by the asterisk that precedes the command (see the syntax description
provided below).
Note! Only commands that are listed in the Integrator’s Manual are supported
unless otherwise stated. Other commands may be listed by the module
but these are only included for historical or legacy reasons.
1.2 Syntax Description
This section provides a brief description of the syntax used for the
GM47, AT command set. See the ITU-T recommendation V.25ter for
additional information.
1.2.1 Conventions
In this manual, the following conventions are used to explain the AT
commands.
<command> The name of the command that is to be entered.
<parameter> The parameter values that are defined for a certain
command.
<CR> The command line is terminated by the Carriage
Return (or Enter key) or ATS3 command.
<LF> Line feed character or ATS4 command.