At Command Reference; General Information To The Command Sets - insys icom GSM small 2.0 Manual

INSYS GSM small 2.0
12

AT Command Reference

12.1

General Information to the Command Sets

The AT commands can only be entered locally via the serial interface, if the INSYS
GSM small 2.0 is in offline state (no active data connection) or in online command
mode (interrupted data connection). The most important commands are listed in
this document.
The modem guideline V.250 must be used in view of the chronological sequence of
the interface commands.
The AT standard is a line-oriented command language. Each command consists of
three elements: prefix, body and end character.
The prefix always consists of the characters "AT", the only exception is the com-
mand "A/".
The body consists of the command name and possible related parameters.
Parameters are always displayed in angular brackets <...>. If parameters are op-
tional, these are additionally displayed in square brackets [...].
The entry is not case-sensitive.
All commands are completed with the line end character, configured with the ATS3
command (Default = <CR> = 0Dh). The line edit character, configured with the
ATS5 command, can be used to delete incorrectly entered characters
(Default = <BS> = 08h).
AT Command Reference
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