Description
AT commands
Modem response
Comments
Network
registration
checking
AT+CREG?
CREG=<mode>,1
Modem registered to the network
CREG=<mode>,2
Registration lost, re-registration attempt
CREG=<mode>,0
Modem not registered 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
Receiving an
incoming call
RING
An incoming call is waiting
ATA
OK
Answer the call
Make a call
ATD1234567;
OK
Communication established (Don’t forget the
“;” at the end for “voice” call)
+CME ERROR: 11
PIN code not entered (with +CME=1 mode)
+CME ERROR: 3
AOC credit exceeded or a communication is
already established
Make an
emergency call
ATD 112;
OK
Communication established (Don’t forget the
“;” at the end for “voice” call)
Communication
loss
NO CARRIER
Hang up
ATH
OK
Enter PIN code
AT+CPIN=1234
OK
PIN Code accepted
+CME ERROR: 16
Incorrect PIN code (with +CME=1 mode)
+CME ERROR: 3
PIN already entered (with +CME=1 mode)
Saves parameters
in non-volatile
memory
AT&W
OK
The configuration settings are stored
Confidential, the whole document is the sole property of Maestro Wireless Solutions ltd.
3603-9, 36/F., 118 Connaught Road West, Sheung Wan, Hong Kong
29
