[SIPForum-discussion] Port numbers problem

[andre heller]

Hi,
this is my problem when I use the port number which I sent in my SDP I could not send anything but on the other hand when I use port = 5060 as my local port to send RTP it is working absolutely fine. I am sending my RTP packets to the port number which I received from the remote party's SDP.

>From my knowledge I am using new DGRAM socket for my RTP, I am sure that I am binding and sending in a correct way.

I also got some replies stating that it does not matter from which port I send my RTP packets, but it is important that to which port I send my RTP packets(port number which I received from the remote party's SDP) and on which port I listen matters (port number which I have sent in my SDP).

Any comments!

Regards
-------- Original-Nachricht --------
> Datum: Tue, 8 Mar 2011 09:59:26 +0200
> Von: "Melih KÜÇÜKERDÖNMEZ" <melihk at gmail.com>
> An: andre heller <andre.heller1 at gmx.de>
> CC: discussion at sipforum.org
> Betreff: Re: [SIPForum-discussion] Port numbers problem

> Hi,
> 
> Definitely the second: You should use the port number which you sent in
> your
> SDP. You should send the RTP packets to the port number where you received
> the remote party's SDP.
> 
> Regards,
> 
> 
> On Mon, Mar 7, 2011 at 7:47 PM, andre heller <andre.heller1 at gmx.de> wrote:
> 
> > Hi,
> > I need some clarification regarding binding port numbers when sending
> RTP
> > packets.
> >
> > I am using network sockets in developing my SIP Client. When I send my
> RTP
> > packets to the SIP Server which port should I locally bind to i.e my
> client
> > should be binded to which port number, should it be the SIP Port = 5060,
> or
> > the port number which I have sent with my INVITE which is m=audio 18990
> > RTP/AVP.
> >
> > Can somebody give more information regarding this.
> >
> > Regards
> > --
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> 
> 
> 
> -- 
> Melih Küçükerdönmez

-- 
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