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AT+CR
This command enables the report +CR: <type> that identifies the current connection. The report is
given before the connection message.
Command
AT+CR=0
AT+CR=1
AT+CR?
Default: AT+CR=0
AT+CRC
This command enables the report +CRING: <type>, instead of the traditional RING message.
Command
AT+CRC=0
AT+CRC=1
AT+CRC?
Default: AT+CRC=0
AT+CREG
This command enables the automatic report to any change of status during the modem registration
to the GSM network.
For further information on AT+CREG command, see the chapter "Functional Examples".
Command
Possible answers
AT+CREG=<n>
OK
AT+CREG?
+CREG: <n>,<stat>,[<lac>,<ci>]
AT+CREG=?
+CREG: (0-2)
Default: AT+CREG=0
<n>
Report status
0
Report disabled
1
Report enabled with +CREG: <stat>
2
Report enabled with +CREG: <stat>,<lac>,<ci>
<stat>
Registration status
0
Modem not registered, GSM Bulk is not currently searching for a new operator
1
Modem registered with the same operator of the SIM card
2
Modem not registered, GSM Bulk is searching for a new operator
3
Registration denied
4
Registered at an unknown network
5
Modem registered in roaming
<lac>
Location Area Code in hexadecimal format (e.g. "00C3" is the same as "195" in
decimal)
<ci>
Cell ID in hexadecimal format
Connection report
Possible answers
OK
OK
+CR: 0
Cellular Result Code
Possible answers
OK
OK
+CRC: 0
GSM Network registration
Action
Report disabled
Report enabled
Shows the current settings
Action
Report disabled
Report enabled
Shows current settings
Action
Report enabled or disabled
Shows the current registration status of
the GSM modem to the network
Shows the available settings
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