[OpenSIPS-Users] Query about RTP flow

[Ali Pey]

Terms Direct RTP or Proxy RTP through your SIP server has nothing to do
with your network routers and switches. It basically means if Client A is
sending RTP packets to the IP address of Client B or if Client A is sending
RTP packets to the IP address of your SIP server and the SIP server needs
to re-send the packets to Client B and vise versa.

So if the SIP server is in the middle of RTP communications that's proxy
RTP. If RTP packets don't reach your SIP server and is only between the
Clients, that's Direct speech path.

Regards,
Ali Pey


On Tue, Feb 25, 2014 at 3:46 AM, Nandini madhu <sermj2012 at gmail.com> wrote:

> Dear All,
>
> I have read about SIP and RTP packet flows but ended with a question about
> RTP packets flow logic between client-to client when the SIP session starts.
> I have a running Opensips server on ubuntu platform which is also
> configured fro DNS and DHCP servers.
> And following is my test bed set-up:
>
>
> Opensips server
>                                                                  (DNS+
> DHCP+Opensips)
>
>        |
>                                   Router <---------------------------->
> Switch<----------------------------> Router
>                                       |
>                                                    |
>                                   clientA <---------------------
> RTP(audio/video) ? --------------------> client B
>
> Now when the SIP session established (SIP Packets have to pass through all
> the routers and switch to reach Opensips server), RTP session will start
> between Client A and B. But What is meant by client to client here ?
> what is the RTP packets path between the clients to reach their
> destinations ?
> Is the RTP packets have to pass through Routers and switch to reach its
> destination client ? (i.e Client A--->Router 1---->switch -----> Router
> 2-----> client B)  ?
> What if i connect both client A and client B to the same router ?
>
> PS: I have not configured any media-relays (RTPproxy/Media-proxy)
>
> Please help me in clarifying all this doubts.
>
> Anybody's help will greatly appreciate.
>
> Regards,
> Nandini
>
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> Users at lists.opensips.org
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>
>
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