Toshiba VP 300, Installation Instructions Manual

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CALL PROCESSING TRACE (CPT)
The CPT (Call Processing Trace) logs call processing activities and events to a file on the hard disk drive.
The CPT logs events for:
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All system activities.
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User activity while logged onto a mailbox.
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Activity on a port.
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Activity for network locations.
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Message activity for a specific message.
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Integration activity.
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Applications processor activity.
The CPT logs activity detected by the VP 300. The CPT can be used to determine, for example, why a
caller dialing 399 received the response "EXT 39 is invalid." The CPT can help determine which port was
used for that call. However, the reason for the failure requires extensive testing to determine why the digit
was not detected. Possible reasons may 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, and should only be used as such. As a diagnostic aid, the CPT is designed to
be used in conjunction with a detailed customer complaint. When properly used, the CPT helps to verify or
explain complaints, 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:
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The PBX numbering plan.
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The VP 300 mailbox/extension numbering scheme.
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The extension numbers assigned to the VP 300 ports.
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PBX function and feature access codes.
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Using the CPT
When the unexpected event is identified in the CPT, the first step is to backtrack and attempt to
understand all activity reported prior to the event.
Examine the CPT to determine the DTMF digits entered just prior to the event. This usually explains
why the VP 300 performed the way it did.
Storage The CPT stores several hours of activity for a high traffic, very active
system, and up to several days of activities for a small, low traffic system.
Toshiba VP Systems Release 7.1 July, 1994
MAINTENANCE
5-27
5.4