AT Command Reference
INSYS GSM small 2.0
Each command is acknowledged with a response according to V.250 (configura-
tion with
ATV
):
Response
Code Type
Meaning
OK
0
final
Command executed, no error
CONNECT
1
final
Connection established, if parameter setting
X=0
CONNECT[<text>]
final
Connection established, if parameter setting
X>0
<text>
: e.g. ‘
connect 9600
’. The data
transmission rate is then 9600 Bit/s.
RING
2
unsolicited Ring tome detected
NO CARRIER
3
final
Connection not established or terminated
ERROR
4
final
Invalid command or command line too long
NO DIALTONE
5
final
No dial tone, connection establishment not
successful, wrong operating mode
BUSY
6
final
Remote terminal busy
NO ANSWER
7
final
Timeout during connection establishment
A
<CR>
(Carriage Return) is indicated as line end character in the further course to
ease readability. The standard responses
OK
or
ERROR
are always used as re-
sponses, regardless of the actually selected responses according to V.250.
We recommend a delay of at least 100 ms following a response on a command to
be able to send possible further unsolicited result codes.
We refer to the detailed command set of the GSM engine for a series of
AT
com-
mands in one command line.
12.2
Short Description AT Commands
The
AT
commands comprise the specifications according to V.250, GSM 07.07 and
GSM 07.05. Only the most important
AT
commands are described with syntax and
parameters in the following.
The applicability of individual features may depend on the selected GSM network.
Syntax:
<Expressions>
in angular brackets indicate parameters.
[
Expressions
] in square brackets indicate optional inputs
.
Factory default settings are indicated with "(default)".
64
