[Spce-user] Directly Fowarding Calls in sipwise

Andrew Pogrebennyk apogrebennyk at sipwise.com
Tue Oct 28 08:57:26 EDT 2014

Hi Martin,

OK, I see. The Sipwise platform does not generate any SDP on calls or
call forwarding, it does that only if you make a call to a conference or
voicebox service which is answered by sipwise spce.

The SDP comes from the callee - the Sonus_UAC with first IP octet 185.
Actually it sends the SDP in the 183 which I overlooked before but does
not send any in 200 OK. Weird. Anyway, that's callee (Sonus) that sends
the a=direction:passive attribute. I think you should check with them..

Hope this helps.

On 10/28/2014 01:45 PM, Martin Stix wrote:
> Hi Andrew!
> The question is, why there's no sdp in it.
> Only sipwise is acting here, no client subscriber etc.
> The direction attribute says that in this particularly case sipwise is going to establish the stream.
> So again: Is there a way to disable Comedia, or do a re-invite?
> In normal call forwarding situation (peering to sipwise to customer to sipwise to another peering) there is no direction attribute coming vom ngcp and you see an SDP immediately.
> Thanks

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