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New Member

SIP hairpin problem

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.

3 REPLIES
New Member

Re: SIP hairpin problem

I'm having the same problem... any luck finding out what the problem is... Thanks.

Green

Re: SIP hairpin problem

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?

New Member

Re: SIP hairpin problem

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

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