User manual

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3.2. Basic Operation :
Followings are examples of some AT commands. Please refer to the AT Command guide for a full
description.
Note : Issue AT+CMEE=1 to have extended error code (+CME ERROR)
Description AT commands Modem response Comments
AT+CREG? CREG=<mode>,1 Modem registered to the network
CREG=<mode>,2 Registration lost, re-registration attempt
Network Registration
Checking
CREG=<mode>,0 Modem not registration on the network, no
registration attempt
Receiving signal
strength
AT+CSQ +CSQ: 20,0 The first parameter has to be at least 15 for normal
communication
RING An incoming call is waiting
ATA Answer the call
Receiving an
incoming call
OK
ATD1234567; Don’t forget the « ; » at the end for « voice » call
OK Communication established
CME ERROR : 11 PIN code not entered (with + CMEE = 1 mode)
CME ERROR : 3 AOC credit exceeded or a communication is
already established
Make a call
CME ERROR : 10 Cannot read the SIM card
ATD 112; Don’t forget the « ; » at the end for « voice » callMake an emergency
call
OK
Communication loss NO CARRIER
ATHHang up
OK
AT+CPIN=1234
OK PIN Code accepted
+CME ERROR : 16 Incorrect PIN Code (with +CMEE = 1 mode)
Enter PIN code
+CME ERROR : 3 PIN already entered (with +CMEE = 1 mode)
AT&WSaves parameters in
non-volatile memory
OK The configuration settings are stored