Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 196)

GSM Network Commands
Signal Quality +CSQ
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WM_DEV_OAT_UGD_049 - 001 VOLUME 2 August 23, 2007
11 GSM Network Commands
11.1 Signal Quality +CSQ
11.1.1 Description
This command is used to read the received signal strength indication and the channel
bit error rate with or without a SIM card inserted.
11.1.2 Syntax
Action command
AT+CSQ
+CSQ: <rssi>,<ber>
OK
Read command
None
Test command
None
11.1.3 Parameters and Defined Values
<rssi>:
received signal strength
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>: channel bit error rate
0…7 as RXQUAL values in the table GSM 05.08 [10]
99 not known or not detectable
11.1.4 Parameter Storage
None.