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Re: [MMUSIC] Interactions between POFs, PANs and 3264 Offer/Answers

Harald Alvestrand <harald@alvestrand.no> Mon, 19 August 2013 15:02 UTC

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From: Harald Alvestrand <harald@alvestrand.no>
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Subject: Re: [MMUSIC] Interactions between POFs, PANs and 3264 Offer/Answers
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On 08/16/2013 09:17 AM, Christer Holmberg wrote:
> Hi,
>   
>>> It has been indicated that POFs (partial offers) and PANs (partial answers) form a stand-alone mechanism, instead of being an extension of RFC3264.
>> uh, I don't think so. THey seem sot be an optional extension to 3264
> Well, that is not what was indicated during the meeting (if we don't count Hadriel :)...
>
> Anyway, I guess that is part of the solution discussions. But, whatever it's an extension or not, I don't think it changes the fact that there will interactions between POF/PANs and 3264 O/As.
>
My impression is that we're defining a new mechanism that contains 
3264-style O/A *and* POF/PAN.

Applications will then either use that mechanism or use 3264 only 
(analogous, kind of, to applications either using RTP/AVP or RTP/AVPF).

So I see no "interaction" as such, but the semantics of the new 
mechanism have to be defined, and, if we intend it for use in SIP, how 
to negotiate its use has to be defined.

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