LogCommands 7-5
Octel 200/300 S.4.1PB60019−01
7.2 CALL PROCESSING TRACE (CPT)
The Call Processing Trace (CPT) logs all call processing and messaging activities and events to one file
on the hard disk drive. The CPT logs events for the following activities:
-Mailboxes
-Ports
-Network locations (Analog and Digital networking activities are logged separately.)
-Message headers
-Integrations
-Applications processors (Works for Serenade)
-Client Server Protocol (Used to trace activity for OctelDesigner Applications)
The CPT logs activity detected by the Octel 200/300. The CPT can be used to determine, for example, why
a caller entering 399 received the response “Extension 39 is invalid. ” The CPT can help determine the port
that was used for the call. However, the reason forthe failure requires extensive testing to determine why a
digit was not detected. Possible reasons might include the caller’s instrument, transmission quality, or any
other interruption in the transmission path during sending of the DTMF digits.
The CPT is a diagnostic aid that is designed to be used when a detailed customer complaint is received.
When used correctly, the CPT helps to verify or explain problems, such as late delivery or reappearing
messages.
When the CPT function is used as part of the process to determine why something unexpected happened,
several points should be considered:
-The PBX numbering plan
-The Octel 200/300 mailbox/extension numbering scheme
-The extension numbers assigned to the Octel 200/300 ports
-The PBX function and feature access codes

Using the CPT Log

When an unexpected event is identified in the CPT, the first step is to backtrack and attempt to
understand all activity reported before the event. The CPT stores several hours of activity for a large,
high traffic message server and up to several days of activities for a small, low traffic message server.
To collect and analyze specific call processing and message activities, you can use either:
LIST TRACE
Prints a simple menu whose options provide predefined filtering.
or
LOG PR CPT
Prints files with no default filters. However, because specific filters can be designated, this command
allows greater control and flexibility by using the filters.
Examine the CPT to determine the DTMF digits entered just before the unexpected event. The CPT
usually explains why the Octel 200/300 performed the way it did.