User's Manual

Page 102 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.5.4.4 +CSQ- signal quality
+CSQ – signal quality
Execute command
AT+CSQ Reports received signal quality indicators in the form
+CSQ:<rssi>,<ber>
where
<rssi> - received signal strength indication
0 - 113 dBm or less
1 - 111 dBm
2...30 - 109dBm ... -53 dBm / 2 dBm per step
31 - 51 dBm or greater
99 - not known or not detectable
<ber> - bit error rate %
0 - less than 0.2 %
1 - 0.2% a 0.4%
2 - 0.4% a 0.8%
3 - 0.8% a 1.6%
4 - 1.6% a 3.2%
5 - 3.2% a 6.4%
6 - 6.4% a 12.8%
7 - more than 12.8%
99 - not known or not detectable
Note: this command should be used instead of the AT%Q and AT%L
commands, since GSM relevant parameters are the radio link ones and
no line is present, hence %Q %L and have no meaning.
Read command
Write command
Test command
AT+CSQ=?
Returns the supported range of values of the parameters <rssi>and
<ber>.
Example
Reference GSM 07.07
SW release Version A