[Freeswitch-users] Generating ringback if 180 arrives after 183

[Michael Collins]

Any chance you can find the person who designed their SIP stack and hit him
with a ClueBat?
-MC

On Fri, Jun 17, 2011 at 4:14 AM, Matteo <mbrancaleoni at voismart.it> wrote:

> Hi all,
>
> I've the following scenario from my upstream provider :
>
> FS calls provider
> Provider sends easrly media with 183 announcing that the call is going to
> be trasferred
> Provider sends 180 without sdp
>
> In my dialplan I'm using ringback variable to let FS generate ringback
> to internal network, and if I receive 180 without 183 is working ok.
>
> What I'm trying to achieve is to let ringback work even if we've already
> received
> the 183 with sdp.
>
> I've tryed a lot of dialplan magic without luck.
> Maybe we need to add this support into FS itself ?
>
> What I see seems that we need to break the bridge or at least
> "inject" the tone stream into the internal leg of the call.
>
> To be fair, the exact sequence is:
>
> FS calls provider
> provider sends 183/sdp annoucing the call trasnfer
> provider sends update which stops the media (media=inactive)
> provider sends 180 ringing (we must generate here)
>
> maybe the correct way is to handle the update, put fs back
> into ringing state and proceed from there?
> Is feasible or we can get the same result with some dialplan magic?
>
> any hint is appreciated :)
>
> regards,
> matteo
>
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