[SR-Users] parallel media forking during ringing phase

[Daniel-Constantin Mierla]

Hello,

which SIP UA is supposed to send the early media? The caller device or
the PBX system?

Cheers,
Daniel


On 26/01/2017 08:48, Tomas Zanet wrote:
> Hi all, I'm writing to the community because I need a hint from Kamailio and voip gurus: the goal is adding parallel forking call with early-media to our PABX where there's a Kamailio instance running.
> I mean media streams should be sent to all call destinations before answering the call order, for instance, to see the incoming video.
>
> As far as I know, from signaling side should not be a problem because, using Kamailio, there’s append_branch function which forks many branches to all users.
>
> The problem is related to media streams because there’s no way to fork media to all users after 180 + SDP or 183, right?
> Obviously all users must negotiate the same media because media transcoding is basically impossible, especially for video streams.
>
> I think there are two ways to do that:
> 1) using Kamailio and Asterisk. Asterisk has Queue function with ringall strategy, but I’m not sure if Asterisk supports multi domain scenarios.
> Have ever used Asterisk with Kamailio in multi domain scenarios?
>
> 2) enhancing rttpproxy-ng. I don't really know the effort to achieve that.
>
> In your opinion, what’s the easiest way to achieve that?
>
> Thanks,
> Best Regards.
>
>
>
> Tomas Zanet
> Software Design Department
> tzanet at came.com
> CAME S.p.A.
>
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-- 
Daniel-Constantin Mierla
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