ITU-T Q.931 p. 4.5.12 The content and use of the Cause information element is defined in
Recommendation Q.850, Usage of cause and location in the digital
subscriber signaling system No. 1 and the Signaling System No. 7
ISDN user part
Notes:1. Timestamps (hh:mm:ss format) are required.
Milliseconds (hh:mm:ss.sss format) are highly recommended 2. Make
sure the syslog prefix is removed (to exclude confusion with IOS debugs)
3. Q.931 messages for calls established before the logging started
are ignored 4. Sorting works correctly if the number of calls is
less than 1'000'000 and the number of records (lines) per call is less
than 100.
Notes:1. Timestamps (hh:mm:ss format) are required.
Milliseconds (hh:mm:ss.sss format) are highly recommended 2. Make
sure the syslog prefix is removed (to exclude confusion with IOS debugs)
3. CAS messages for calls established before the logging started
are ignored 4. Sorting works correctly if the number of calls is
less than 1'000'000 and the number of records (lines) per call is less
than 100.