PIONEERPOS G24-LC manual AT Commands Overview, General Symbols Used in AT Commands Description

Chapter 2: Introduction to AT Commands

AT Commands Overview

AT commands are sets of commands used for communication with the G24-L cellular modem.

AT commands are comprised of assemblies of ASCII characters which start with the "AT" prefix (except the commands A/ and +++). The AT prefix is derived from the word Attention, which asks the modem to pay attention to the current request (command).

AT commands are used to request services from the G24-L cellular modem, such as:

•Call services: dial, answer and hang up

•Cellular utilities: send/receive SMS

•Modem profiles: Auto Answer

•Cellular Network queries: GSM signal quality

General Symbols Used in AT Commands Description

The following syntax definitions apply in this chapter:

Syntax	Definition
<CR>	Carriage return character, specified by the value of the S3-register.
<LF>	Line-feed character, specified by the value of the S4-register.
<...>	Name enclosed in angle brackets is a syntax element. The brackets themselves do not
	appear in the command line.
[...]	Optional sub-parameter of a command or an optional part of terminal information
	response, enclosed in square brackets. The brackets themselves do not appear in the
	command line. When the sub-parameter is not provided in the parameter type
	commands, the new value equals its previous value. In action type commands, the
	action should be performed on the basis of the recommended default setting of the
	sub-parameter.
//	Denotes a comment, and should not be included in the command.

April 15, 2008 G24-L AT Commands Reference Manual 2-1