Problems with Call Pickup via SIP trunk

[fsabir]

Hi guys,

Running a CM v 6.3 with SIP trunks. When a call is received via the SIP trunk I get a failure when someone uses the call pickup feature.

We have done some extensive testing and we have concluded the following:

1. Call only fails when it comes via a SIP trunk.
2. ISDN calls do not fail
3. Internal calls do not fail
4. Extremely intermittent

I have done some MST and TAC traces etc and cannot see any problems between a good and bad call. The only difference I can see is between an ACK and BYE.

For the BAD call, CM is receiving ACK and BYE at the same timestamp
09:55:51.287 |----ACK--->| (369) sip:[email protected]
09:55:51.329 |----BYE--->| (369) sip:6158@@10.X.X.X

For the Good call, there is a 5 sec difference between the ACk and BYE.
09:57:32.363 |----ACK--->| (403) sip:[email protected]
09:57:39.686 |----BYE--->| (403) sip:[email protected]


Any one have any ideas why this could be.. I now have a sneaky feeling this maybe an service provider issue - anyone ever have such an issue.

[jacks196]

Hi fsabir,

Do you ever make any progress with this issue?..... I have a user that is reporting the same issue, although I've not got as far as doing any traces yet, I'd be interested to hear what the outcome was with the issue you've reported...

Cheers

Ashley