VoiBridge
www.topex.ro
installation manual
page
31
APPENDIX 2 – AT commands
AT Command
Purpose
Response
AT
Allows the user to check the functionality
of the GSM module
Should be "OK" in case of success:
AT+CPIN?
The GSM module is interrogating about
pin code. This is a useful method to
check if a SIM card is plugged in a GSM
module.
-
ERROR - there is no SIM installed or
there is another error;
-
READY - if no PIN code is required;
-
SIM PIN - the SIM is waiting for PIN
code;
-
SIM PUK - the SIM is waiting for PUK
code
AT+CREG?
This AT command is used to check if the
module is registered within the GSM
network.
The response is:
+CREG:<n>,<stat>,"xxxx",
"xxxx"
where <stat> can be:
-
stat = 0 - the module is not registered
and does not try to register to a GSM
operator;
-
stat = 1 - the module is registered
within a GSM network;
-
stat = 2 - the module is not registered
but is trying to register to a GSM
operator;
-
stat = 3 - the registration is not
allowed;
-
stat = 4 – unknown;
-
stat = 5 - the module is registered and
he has roaming.
AT+CLIR=<n>
where
n=0
for
default,
where n=1 for not
sending the identity
and n=2 to allow the
sending the identity
This command is used to enable or
disable the sending of the identity (caller
ID)
The module is responding with "OK" with
a delay that depends upon the loading of
the GSM network. Until the response is
waiting an additional AT command must
not be sent to the module.
AT+CLIR?
To check the settings for identity
+CLIR:1,4 - identity not sent
+CLIR:2,4 - the identity is sent
+CLIR:0,4 - default value
AT+CLIP=<n>
where n=0 for not
displaying
the
identity of the calling
part and n=1 to
To display or to not display the identity of
the calling part in case of a call through
the monitored GSM port
The module should be responding with
"OK", like this:
