On 7/4/17 12:55 PM, Rodrigo Pimenta Carvalho wrote:
Hi.
I still have to study and learn about forking calls via SIP.
But, before starting my studies, I would like to know if it is possible to do
fork + early media.
For example, when user U1 calls and his call is forked (parallel fork) to
users U2 e U3, if there is early media negotiation between the caller and the
callees, can U1 keep the media stream with U2 and U3 simultaneously?
If it is not possible to keep such early media streams, is it a matter of SIP
capacity ?
It's *possible* - it could happen. It just depends on how the
alternative forks behave. It is up to the caller to decide how to cope
in this case. The first step is to realize it can happen (that seems to
be where you are) and then decide on a strategy to deal with it.
You could try to mix the streams for playout to your caller. But that is
a bother and is unlikely to provide a good user experience. Or you can
play out one stream and ignore the others. Of course you would like to
play out the one that is going to answer first, but you don't know which
one that is. If you guess right then you will have a good user
experience. If you guess wrong then things will seem odd to the user
when you eventually switch to the stream from the answerer. That will
require you to start playing out a stream you had been ignoring - you
need to figure out when to do that. It won't necessarily be obvious from
the answer sdp which stream that is.
Good luck,
Paul
_______________________________________________
Sip-implementors mailing list
[email protected]
https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
