
Entering AT commands
TAINY GMOD-T1
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File 3159AD001_V1_3_050701.doc
File saved
01.07.2005
File printed
01.07.2005
State Freigabe
Autor Katharina
Bora
4.1
The AT command language
Syntax
The AT command language is a standard for controlling modems.
It is line-orientated. Each command line begins with
AT
(for
ATtention), followed by the actual command, and ends with
¬
¬
¬
¬
(Enter key).
Example: ATD444444
¬
¬
¬
¬
means: dial (D for Dial) 444444
There are only two exceptions to this rule:
The command
+++
to switch to Command Mode (see below)
and the command
A/
with which the last command line is repeated.
Command Mode,
Transparent Mode
The device accepts AT commands only when it is in Command
Mode.
It is in
Command Mode
,
•
when there is no active connection,
•
when the sequence Pause +++ has been entered during a
connection.
The device does not accept AT commands when it is in
Transparent Mode.
It is in
Transparent Mode
,
•
when there is an active connection,
•
when the device has been switched to Command Mode
during an active connection with +++ and then switched back
to Transparent Mode with
ATO
.