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List:       sip-implementors
Subject:    Re: [Sip-implementors] RTCP port in remote SDP
From:       Manu Gowdru <manugs05 () gmail ! com>
Date:       2013-11-07 11:42:57
Message-ID: CAJSWqvuo4LKtX5gNpOEst4ACc786FTGow4M-WaxmCsf4t6da1g () mail ! gmail ! com
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Thanks Gaurav.


On Thu, Nov 7, 2013 at 3:33 PM, Gaurav Kumar <gaurav.kumar@ittiam.com>wrote:

>  RTCP port mayn’t be next higher port in cases where your endpoint is
> behind NAT (router) and you need to do STUN query to find the mapped
> ip:port for the RTP media and RTCP channel.  Your router mayn’t always open
> two consecutive ports for RTP and RTCP.
>
>
>
> In those cases, sending RTCP port attribute becomes mandatory to tell
> other end that RTCP port is not the next subsequent port but the one
> defined in the rtcp attribute.
>
>
>
> Thanks,
> Gaurav
>
>
>
> *From:* Manu Gowdru [mailto:manugs05@gmail.com]
> *Sent:* Thursday, November 07, 2013 2:58 PM
> *To:* Gaurav Kumar
> *Cc:* Sip-implementors@lists.cs.columbia.edu
> *Subject:* Re: [Sip-implementors] RTCP port in remote SDP
>
>
>
> Hi Gaurav,
>
>
>
> When RTCP port is the next higher odd port number why is it mentioned in
> SDP?any reasons?
>
>
>
> Thanks,
>
> Manu
>
>
>
> On Thu, Nov 7, 2013 at 2:09 PM, Gaurav Kumar <gaurav.kumar@ittiam.com>
> wrote:
>
> Hi Manu,
>
> Remote SDP can contain rtcp attribute in the SDP which can specified for
> each media (m = ) line.
> This rtcp attribute will tell us the rtcp port opened by the remote end.
>
> Thanks,
> Gaurav
>
>
> -----Original Message-----
> From: Manu Gowdru [mailto:manugs05@gmail.com]
> Sent: Thursday, November 07, 2013 11:51 AM
> To: Sip-implementors@lists.cs.columbia.edu
> Subject: [Sip-implementors] RTCP port in remote SDP
>
> Hi Guys,
>
> does remote sdp contains rtcp port.
>
> --
>
> Manu
>
> _______________________________________________
> Sip-implementors mailing list
> Sip-implementors@lists.cs.columbia.edu
> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
> This is confidential Ittiam property.
>
>
>
>
>
> --
> Keep Smiling :)
> Manu
>  This is confidential Ittiam property.
>



-- 
Keep Smiling :)
Manu
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