WM_PRJ_M12_UGD_001 - 002
18th September 2003
confidential ©
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5 AT commands for the modem
The table below reminds the main AT commands required for getting started
the modem.
For other AT commands available or further information about the AT
commands, refer to document [1].
Description AT
commands
Modem’s
response
Comment
OK
PIN Code accepted.
+CME ERROR: 16
Incorrect PIN Code
(with +CMEE = 1 mode).
Enter PIN Code AT+CPIN=1234
+CME ERROR: 3
PIN already entered
(with +CMEE = 1 mode).
CREG=<mode>, 1 Modem synchronised on
the network.
CREG=<mode>, 2
Synchronization lost, re-
synchronization attempt.
Modem
synchronization
checking
AT+CREG?
CREG=<mode>, 0
Modem not synchronised
on the network, no
synchronization attempt.
Receiving an
incoming call
ATA
OK
Answer the call.
OK Communication
established.
CME ERROR: 11
PIN code not entered (with
+CMEE = 1 mode).
Initiate a call
ATD<phone
number>;
(Don’t forget
the « ; » at the
end for « voice »
call)
CME ERROR: 3
AOC credit exceeded or a
communication is already
established.
Initiate an
emergency call
ATD112;
(Don’t forget
the « ; » at the
end for « voice »
call)
OK Communication
established.
Communication
loss
NO
CARRIER
Hang up
ATH OK
Store the
parameters in
EEPROM
AT&W
OK
The configuration settings
are stored in EEPROM.
