6 network service commands, 1 signal quality +csq, 1 description – Rainbow Electronics 900 User Manual
Page 43: 2 syntax, 3 defined values, 2 operator selection +cops, 6 network, Service commands, Signal quality +csq, 2 operator
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6 Network service commands
6.1 Signal Quality +CSQ
6.1.1 Description
:
This command is used to ascertain the received signal strength indication (<rssi>) and the channel
bit error rate (<ber>) with or without a SIM card inserted.
6.1.2 Syntax
:
Command syntax : AT+CSQ
Command
Possible responses
AT+CSQ
+CSQ: <rssi>,<ber>
OK
Note : <rssi>,<ber> as defined below
AT+CSQ=?
+CSQ:(0~31),(0~7)
OK
Note : get parameter range
AT+CSQ?
+CME ERROR: 3
Note : not support
6.1.3 Defined
values
:
<rssi> :
0: -113 dBm or less
1: -111 dBm
2 to 30: -109 to –53 dBm
31: -51dBm or greater
99: not known or not detectable
<ber> : 0…7: as RXQUAL values in the table GSM 05.08
99: not known or not detectable
Notes: <ber> is not valid and only response “99”
6.2 Operator selection +COPS
6.2.1 Description
:
There are three possible ways of selecting an operator (PLMN):
1) The product is in manual mode. It then tries to find the operator specified by the application and if
found, tries to register.