User's Manual

Iridium Satellite LLC
9601 Transceiver –AT Command Reference
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Information contained herein is preliminary and subject to change without further notice
Note: The DTE may initiate an SBD session even if service is unavailable; in this
case, the 9601 makes an immediate search for the network and, if successful,
starts the SBD session, otherwise the SBD session fails.
2.22 +CSQ –Signal Quality
Exec Command: +CSQ
Execution command returns the received signal strength indication <rssi> from the
9601. Response is in the form:
+CSQ:<rssi>
where:
<rssi>:
0 Equivalent to 0 bars displayed on the signal strength indicator.
1 Equivalent to 1 bar displayed on the signal strength indicator.
2 Equivalent to 2 bars displayed on the signal strength indicator.
3 Equivalent to 3 bars displayed on the signal strength indicator.
4 Equivalent to 4 bars displayed on the signal strength indicator.
5 Equivalent to 5 bars displayed on the signal strength indicator.
Test Command: +CSQ=?
List the supported signal strength indications. The response is in the form:
+CSQ:(supported <rssi>s)
Note: A signal strength response may not be immediately available, but will usually
be received within two seconds of issuing the command. If the 9601 is in the
process of acquiring the system, a delay in response of up to 10 seconds may be
experienced.
2.23 +CULK –Unlock (new)
Exec Command: +CULK=<unlock key>
Unlock the Transceiver after it has been locked by the Gateway. The unlock key
must be obtained by contacting Iridium’s customer support.
<unlock key>:
0000000000000000 .. FFFFFFFFFFFFFFFF
A string of 16 hexadecimal digits.