B-1
Appendix B. Useful Configuration
Commands for the COM111
This section gives details of some of the useful test commands that can be used during setup of
the COM111. Further details can be found in the COM111 technical manuals available on
request from Campbell Scientific Ltd.
General details referring to the telecommunications industry can be found at the European
Telecommunications Standards Institute (ETSI) web site at www.etsi.org.
B.1 Signal Quality Checks
AT+CSQ
Signal Quality
Test command
AT+CSQ=?
Response
+CSQ:
(list of supported
<rssi>
s
),
(list of supported
<ber>) OK
Parameter
See execute command
Execute command
AT+CSQ
Response
TA returns received signal strength indication
<rssi>
and channel bit
error rate
<ber>
from the ME.
+CSQ: <rssi>, <ber> OK
Parameter
<rssi>
:
0: -113 dBm or less
1: -111 dBm
2 to 30: -109 to
–53 dBm
31: -51 dBm 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
