SIP hairpin problem

Unanswered Question
Nov 14th, 2007

Hello, i have a problem to make this scenario work:


PSTN call to phone whith CFA to another PSTN number. The call is not answer at all.


I use a 1760 gateway connected through a SIP Trunk to CUCM 5.1(2).


When i use H.323 connection, i have no problem. I think bri hairpin (call forward) with SIP is not supported.


What about your feelings ?

Thanks a lot !

Julien.

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gogasca Sun, 12/30/2007 - 21:27

What is the exact version and the exact behaviour you get?

PSTN phones hears ring back? other phone rings?

what happens?

Do you have the CCM detailed traces?

jtoque Mon, 01/07/2008 - 11:04

Hello, use "isdn static-tei 0" in both bri interface. It fix the issue !

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