[cisco-voip] Dropped calls over ICT and H323 gateway

[Mike O]

Wes,

Thanks for the reply I had to open a tac case and they found the issue with the PRI dropping the inbound call through the H323 gateway. Do they have some type of parsing program that digs through the pages of logs?

Thanks,

Mike
  ----- Original Message ----- 
  From: Wes Sisk 
  To: Mike O 
  Cc: cisco-voip at puck.nether.net 
  Sent: Thursday, July 30, 2009 10:54 AM
  Subject: Re: [cisco-voip] Dropped calls over ICT and H323 gateway


  CallManager traces.  There is checkbox in RTMT to collect them.

  When you setup traces make sure you check the box on the callmanager trace configuration page for enable h225 and enable h245 debugs.

  Just a few pointers that may come in handy:

  1. finding 'dropped' calls in traces is very tedious.  there is monumental investment in knowledge to make sense of traces.  If you can identify dropped calls in CDR it provides much more rapid problem isolation:
  http://supportwiki.cisco.com/ViewWiki/index.php/Dropped_Call_Troubleshooting_in_CUCM

  2. we see many dropped calls caused by TCP session aborts.  As h.323 does not support call preservation by default a TCP session abort of either the H.225 session, H.245 session, or an unregistering phone device will cause the call to drop.  there were a few traces added to help identify some of these cases:

  CSCsm26337    need clear messages for h225 tcp session failure 
  CSCsm26355    need clear messages for h245 tcp session failure 

  I just updated these so updated information will appear in Cisco Bug Toolkit in 24-48 hours.

  Regards,
  Wes


  On Thursday, July 30, 2009 12:06:21 AM , Mike O <mikeeo at msn.com> wrote:

    Hey all Im getting dropped calls across an ICT and H323 gateway, which log do I need to look at in RTMT? I have it all enabled on CM just don;t know which log to download.
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