[SIPForum-discussion] Port numbers problem

[Mudugere, Satish]

Your understanding is correct. In SDP, devices share their receiving ports (sent port can be anything). What ever is mentioned in media line is to be the target media port.

-S

-----Original Message-----
From: andre heller [mailto:andre.heller1 at gmx.de] 
Sent: Tuesday, March 08, 2011 2:24 AM
To: Mudugere, Satish; discussion at sipforum.org
Subject: Re: RE: [SIPForum-discussion] Port numbers problem

Hi Sathish,
you mean to say that it is absolutely fine to send RTP packets using 5060 as local port, to the remote port number which I have received from remote party's SDP. And when I need to listen for RTP then I should be listening on the port number which I have sent in my INVITE/SDP to the remote party.

Finally I can understand it does not really matter from which port I send my RTP.

Correct me if I am wrong.

Regards

-------- Original-Nachricht --------
> Datum: Mon, 7 Mar 2011 19:08:07 -0700
> Von: "Mudugere, Satish" <satish.mudugere at intel.com>
> An: andre heller <andre.heller1 at gmx.de>, "discussion at sipforum.org" <discussion at sipforum.org>
> Betreff: RE: [SIPForum-discussion] Port numbers problem

> While socket binding local port (sending RTP packets from local to remote)
> can be anything, but the remote port must be the one received in media
> line of SDP. In your example it is 18990.
> 
> -S
> 
> -----Original Message-----
> From: discussion-bounces at sipforum.org
> [mailto:discussion-bounces at sipforum.org] On Behalf Of andre heller
> Sent: Monday, March 07, 2011 10:47 AM
> To: discussion at sipforum.org
> Subject: [SIPForum-discussion] Port numbers problem
> 
> 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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