Sony Ericsson TT4031 (SE-GM29) 1.Introduction to AT Commands, 1.2Syntax Description, <CR, <LF, GPRS, Overview, 1.1Overview, Call control, Control of DCE, Supplementary Service

1.Introduction to AT Commands

1.1Overview

AT commands, issued from a computer in your application are used to control and implement the functions of the modem.

Using AT commands, the following actions are possible:

Control of DCE

GPRS

Call control

Supplementary Service

SIM application tool kit

The TT4031 (SE-GM29) 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 modem. The Ericsson-specific commands are identified by the asterisk that precedes the command (see the syntax description provided below).

1.2Syntax Description

This section provides a brief description of the syntax used for the TT4031 (SE-GM29), AT command set. See the ITU-T recommendation V.25ter for additional information.

1.2.1Conventions

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.
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