This is a very non-traditional deployment. SIPX is hosted and there is
an acme sbc sitting in the same network as sipx. all users are remote
(behind a firewall) though sipx is setup to use the remote sbc via
sipxbridge. The issue they are having is with hairpinned calls via the
acme and the itsp. I've suggested to them that they look at using a
second itsp for the forwarded calls to test whether the itsp supports
it, as some simply do not work. Additionally, I've specified their
softphone is incorrectly configured and should be removed from the
test environment until it is properly configured/registered.

4.4(latest)

On Sat, Jan 7, 2012 at 9:42 AM, Michael Picher <[email protected]> wrote:
> What version of 4.4 are you on (check bottom of GUI and post here)?
>
> On Sat, Jan 7, 2012 at 9:11 AM, S.K.- G <[email protected]> wrote:
>>
>> Dear All,
>>
>> We are experiencing a weird problem with the Trunk to trunk call
>> forwarding feature.
>>
>> The call forwarding is not working when an outside caller gets forwarded
>> to another external number.. the call ends up with a dead air, seems like
>> the RTP stream is not getting connected properly as the SIP signaling
>> negotiation process is being completed properly and the receiver phone rings
>> but no audio path when answered.
>>
>> We have tried the resolution xx-9521 but didn't make any differences as
>> the INVITE From ITSP Account was checked ..
>>
>> NAT Traversal, and Server behind NAT are checked in the internet calling
>> form.. SIPX 4.4 on VMWARE server, Polycom IP 650 station, X-lite 4.0
>> The network diagram:   SIPX > SBC> remote Polycom phones(In DMZ)
>>
>> Any helps will be highly appreciated
>>
>> Regards
>>
>> Saad Khankan
>> Toronto- Canada
>>
>>
>>
>>
>> _______________________________________________
>> sipx-users mailing list
>> [email protected]
>> List Archive: http://list.sipfoundry.org/archive/sipx-users/
>
>
>
>
> --
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>
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