Re: [OpenSIPStack] is it necessary to parse RTP in openSBC

[Ashish K. <ash...@gm...>]

Hi Baclor,
This is still not clear to me.
Lets take a example:
Sip Client A is talking to Sip Client B through Proxy/B2BUA(P) which handles
only SIP signaling messages.
Now in Call, Sip Client A is trasnferred to Sip CLient C and now B and C are
talking.
But still they are abel to talk.
Then how this case is different from yours. Can  you please elaborate and
explain to me.

we are considering to build ALG. We have our own SIP stack ( Proxy and B2BUA
) but we dont have RTP stack.  Also we dont want to parse the RTP stream.
Just Rely it, based on source and destination IP and ports. Is this feasible
?. We are also exploring your openSBC if we can used it.




On 8/9/07, Joegen E. Baclor <joe...@gm...> wrote:
>
> There are cases where the SSRC may change in mid call.  One example is
> when called is transferred and OpenSBC is configured for Local REFER.
> There are UAs that will ignore packets when SSRC is changed.  Creating
> new packets gets rid of this problem.
>
>
> Ashish Khare wrote:
> > Hi,
> >
> > I am a new user of openSBC product.
> > I was just going through it and have a quiestion.
> >
> > Why it is  necessary to parse RTP. Why cannot we use only the IP and
> port in
> > the source and destination fiels to route the messages. why such type of
> > details are needed to be known by
> > ssrc=490290042 ntp=2007/8/8-2:22:0.995224 rtp=76800 psent=2 osent=320
> > ssrc=490290042 fraction=0 lost=0 last_seq=131074 jitter=0
> > lsr=419:09:26.072dlsr=0
> >
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