My 3300 ICP occasionally goes into Night service without user input. I can see in the logs that no caller rang the Attendant, but the logs say that the Attendant Busy-out Timer expiry triggered and thus the console switched into Night.
Here is the log note:
Log Type   Maintenance 
Log Number   1965 
Severity   Info 
Date   2012/Apr/21 
Time   08:55:31 
Source   Call Control - Maintenance 
Description   SYSTEM SERVICE: Dept 0 now in NIGHT 1 Service. Reason: 5 Attendant Busy-out Timer expiry on Console 101. 
Module   Main 
File Name and Line Number   Maintenance;0 
Any suggestions how to troubleshoot this?
Thanks