ZyXEL Communications Prestige 28641 - Manual (Page 139)

System Maintenance 125
Session information messages. Some examples of these messages are
shown below:
Call Information Messages:
line 1 channel 1, call 41, C01, Incoming Call, 40001
line 1 channel 1, call 41, C01, ANSWER Connected, 64K
40001
line 1 channel 1, call 41, C01, Incoming Call, Call
Terminated
Error Information Messages:
line 1, channel 1, call 44, E01, CLID call refuse
line 1, channel 1, call 45, E02, IP address mismatch
Session Information Messages:
line 1, channel 1, call 41, I01, IPCP up, 306L
line 1, channel 1, call 41, I01, IPCP down, 306L
Diagnostic
The diagnostic functions on your Prestige allow you to test aspects of
your device to determine if they are working properly. The following list
provides a short description to the types of diagnostic tests available to
your system.