Multi-Tech Systems GPRS (MTMMC-G), GPRS (MTSMC-G)

Chapter 6 – Network Service Commands

Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 32

<oper> 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=<mode>, [<format> [ , <oper> ] ]

Possible Responses for AT+COPS=<mode>

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: <mode> [, <format>, <oper> ]

Response Syntax for AT+COPS=?: +COPS: [list of supported (<stat>, long alphanumeric <oper>,

short alphanumeric <oper>s, numeric <oper>) 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 <oper> 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,<plmn> Manually set current PLMN

Command Possible responses

AT+COPS?

Note: Ask for current PLMN +COPS: 0,2,20801

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”

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 <format> to long alphanumeric OK

AT+COPS?

Note: Ask for current PLMN

+COPS: 0,0,”Orange F”

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 <mode>=0 or 1 is selected