AT Commands User Manual may be: − 0 i.e. -113dBm or less. − 1 i.e. -111 dBm. − 2 ... 30 i.e. -109 ... -53 dBm. − 31 -51 dBm or greater. − 99 i.e. not known or not detectable. bit error rate: − 0 ... 7 as RXQUAL values as described in GSM05.08 sub clause 8.2.4. − 99 not known or not detectable. is used to select whether the selection is done automatically by the ME or is forced by this command tooperator given in the format and may be: − 0 automatic ( field is ignored). − 1 manual. − 2 deregister from network. − 3 set only . − 4 manual / automatic (if manual selection fails, automatic mode is entered). may be: − 0 long alphanumeric (default value). − 1 short format alphanumeric .
− 2 numeric . string type given in format ; this field may be up to 16 character long for long alphanumeric format, up to 8 characters for short alphanumeric format and 5 characters long for numeric format MCC/MNC codes). may be: − 0 unknown. − 1 available. − 2 current. − 3 forbidden. 26 7.3 Operator selection +COPS Command syntax Description AT+COPS= , , . AT+COPS=0,0 This command forces an attempt to select and register the GSM network operator. The command in the execution syntax is abortable hitting a key. OK or CME ERROR: Read command AT+COPS? +COPS: [, , ] OK Test command AT+COPS=? +COPS:
[list of supported ( ),long alphanumeric , short alphanumeric , numeric )s] [,,(list of supported s),(list of supported s)] OK