Cisco Cisco Expressway
Check for errors
Check the Event Log which is accessible from the web browser:
Status > Logs > Event Log
.
Tracing calls
Tracing calls at SIP / H.323 level in Expressway
1. Go to
Maintenance > Diagnostics > Diagnostic logging
.
2. Optionally, select Take tcpdump while logging.
3. Click Start new log.
4. (Optional) Enter some Marker text and click Add marker.
l
The marker facility can be used to add comment text to the log file before certain activities are
performed. This helps to subsequently identify the relevant sections in the downloaded diagnostic log
file.
performed. This helps to subsequently identify the relevant sections in the downloaded diagnostic log
file.
l
You can add as many markers as required, at any time while the diagnostic logging is in progress.
l
Marker text is added to the log with a "DEBUG_MARKER" tag.
5. Reproduce the system issue you want to trace in the diagnostic log.
6. Click Stop logging.
7. Click Download log to save the diagnostic log archive to your local file system. You are prompted to save
the archive (the exact wording depends on your browser).
Call failures with Cisco TelePresence Server
SIP messages from Cisco TelePresence Server can be > 5,000 bytes (which is the default SIP Max
Incoming Message Size configured in Unified CM).
Incoming Message Size configured in Unified CM).
In-call problems
Calls clear down when a call transfer from a video phone on Unified CM
transfers a call to Expressway
transfers a call to Expressway
Even if use of a media termination point (MTP) is not requested on the SIP trunk between Unified CM and
Expressway, if DTMF signaling method is configured as “No preference” on the SIP trunk on Unified CM,
Unified CM will try and use a Media Transfer Point and the call will fail.
Expressway, if DTMF signaling method is configured as “No preference” on the SIP trunk on Unified CM,
Unified CM will try and use a Media Transfer Point and the call will fail.
To resolve this, ensure that DTMF signaling method is configured as RFC 2833 on Unified CM on the SIP
trunk from Unified CM to Expressway.
trunk from Unified CM to Expressway.
Poor video quality from Unified CM
Ensure that your Unified CM region has an appropriate session bit rate for video calls as described in
.
Cisco Unified Communications Manager with Cisco Expressway (SIP Trunk) Deployment Guide (X8.5.2)
Page 32 of 42
Appendix 1: Troubleshooting