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Chapter 15 – GPRS Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 161
GPRS Network Registration Status +CGREG
Description: The set command controls the presentation of an unsolicited result code +CGREG: <stat> when <n>=1
and there is a change in the modem's GPRS network registration status, or code +CGREG:
<stat>[,<lac>,<ci>] when <n>=2 and there is a change of the network cell.
The read command returns the status of result code presentation and an integer <stat> which shows
whether the network has currently indicated the registration of the modem. Location information
elements <lac> and <ci> are returned only when <n>=2 and modem is registered in the network.
Values: <n>
0 Disable network registration unsolicited result code
1 Enable network registration unsolicited result code +CGREG: <stat>
2 Enable network registration and location information unsolicited result code +CGREG:
<stat>[,<lac>,<ci>]
<stat>
0 Not registered; the modem is not currently searching a new operator to which to register
1 Registered, home network
2 Not registered, but modem is currently searching a new operator to which to register
3 Registration denied
4 Unknown
5 Registered, roaming
<lac>
String type; two byte location area code in hexadecimal format
<ci>
String type; two byte cell ID in hexadecimal format
Syntax: Command Syntax: AT+CGREG
Command Possible response(s)
AT+CGREG=[<n>] +CGREG: stat>[,<lac>,<ci>]
OK
AT+CGREG? +CGREG: <n>,<stat>[,<lac>,<ci>]
OK
Note: +CME ERROR: <err>
AT+CGREG=? +CGREG: (list of supported <n>s)
OK