Multi-Tech Systems MMCModem GPRS (MTMMC-G) - Manual (Page 32)

Chapter 6 – Network Service Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 32
Operator identifier (MCC/MNC in numeric format only for operator selection)
The long alphanumeric format can be up to 16 characters long (see Codes and Values Appendix
for operator names description, field is “Name”). The short alphanumeric format can be up to 8
characters long.
Syntax: To force an attempt to select and register on a network, the application must send this command:
Command Syntax: AT+COPS=, [ [ , ] ]
Possible Responses for AT+COPS=
Possible Responses Meaning
OK Network is selected with full service
+CME ERROR: 30 No network service
+CME ERROR: 32 Network not allowed – emergency calls only
+CME ERROR: 3 Not allowed during communication
+CME ERROR: 4 Incorrect parameters
+CME ERROR: 527 Please wait, and retry your selection later
+CME ERROR: 528 Location update failure – emergency calls only
+CME ERROR: 529 Selection failure – emergency calls only
+CME ERROR: 546 Emergency call is not allowed without SIM
+CME ERROR: 547 Emergency call is allowed without SIM
Note: The error codes +CME ERROR: 546 and +CME ERROR: 547 are only returned if the SIM is not
present. The fact that network support emergency call (
+CME ERROR: 547) does not imply that
emergency call without the SIM is working. To find out if it is working is to use the ATD112 command.
Response Syntax for AT+COPS?: +COPS: [, , ]
Response Syntax for AT+COPS=?: +COPS: [list of supported (, long alphanumeric ,
short alphanumeric s, numeric ) s]
Notes:
• If an incoming call occurs during a PLMN list request, the operation is aborted
(+CME ERROR: 520) and the unsolicited RING appears.
• If SPN (Service Provider Name) is present in the SIM, it will be returned in both long and short
alphanumeric fields. The string in the “short” field will be the SPN truncated to the
appropriate character number.
The following operations are allowed with the SIM inserted or the PIN activated:
AT+COPS?
Get Current PLMN
AT+COPS=? List allowed PLMN
AT+COPS=1,2, Manually set current PLMN
Command Possible responses
AT+COPS?
Note: Ask for current PLMN +COPS: 0,2,20801
OK
Note: Home PLMN is France Telecom Orange
AT+COPS=?
Note: Ask for PLMN list +COPS: (2,”F SFR”,”SFR”,”20801”), (3,”F-BOUYGUES
TELECOM”,”BYTEL”,”20820”),(3,”Orange
F”,”Orange”,”20801”
OK
Note: Home PLMN is France Telecom SFR, BYTEL and
Orange networks have been detected
AT+COPS=1,2,20810
Note: Ask for registration on SFR network +CME ERROR: 32
Note: Network not allowed – emergency calls only
AT+COPS=1,2,23433
Note: Ask for registration on UK Orange
network +CME ERROR: 529
Note: Selection failed – emergency calls only
AT+COPS=0
Note: Ask for registration in automatic mode OK
Note: Succeeded
AT+COPS=3,0
Note: Set to long alphanumeric OK
AT+COPS?
Note: Ask for current PLMN +COPS: 0,0,”Orange F”
OK
Note: Home PLMN is France Telecom Orange
AT+COPS=2
Note: Ask for deregistration from network OK
Note: Succeeded
AT+COPS?
Note: Ask for current PLMN +COPS: 2
Note: ME is unregistered until =0 or 1 is selected