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Re: [MMUSIC] Offer/Answer PT Questions - text proposal

"Gonzalo Salgueiro (gsalguei)" <gsalguei@cisco.com> Thu, 25 February 2016 21:03 UTC

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From: "Gonzalo Salgueiro (gsalguei)" <gsalguei@cisco.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>
Thread-Topic: [MMUSIC] Offer/Answer PT Questions - text proposal
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Date: Thu, 25 Feb 2016 21:02:58 +0000
Message-ID: <C7E5ACEF-982F-409F-8B87-E9173237F977@cisco.com>
References: <7594FB04B1934943A5C02806D1A2204B37E425AB@ESESSMB209.ericsson.se> <56CF3BD9.7080307@alum.mit.edu> <7594FB04B1934943A5C02806D1A2204B37E4418E@ESESSMB209.ericsson.se> <CAD5OKxvou3TzO+XyVt1OxNmNUwL+rGs2Aw_aHF+Kg0dnRaaJsQ@mail.gmail.com> <7594FB04B1934943A5C02806D1A2204B37E44296@ESESSMB209.ericsson.se> <CAD5OKxvfF7b49fmdoWwsjvYJu-bmJ_Bomczggc=9gbtcbrfAOQ@mail.gmail.com> <56CF6944.2040103@alum.mit.edu>
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Cc: "mmusic@ietf.org" <mmusic@ietf.org>, Christer Holmberg <christer.holmberg@ericsson.com>
Subject: Re: [MMUSIC] Offer/Answer PT Questions - text proposal
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> On Feb 25, 2016, at 12:51 PM, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
> 
> On 2/25/16 2:06 PM, Roman Shpount wrote:
>> On Thu, Feb 25, 2016 at 1:51 PM, Christer Holmberg
>> <christer.holmberg@ericsson.com <mailto:christer.holmberg@ericsson.com>>
>> wrote:
>> 
>>    >> So, I send you a sendonly offer with PT 111:VP8, it is ok for you to reply with PT 111:PCMU? Both are associated
>>    >> with the same media flow direction, as the offer was sendonly.
>>    >
>>    > These PT are not associated with the same flow direction. Each end point lists PTs it is willing to receive. The end
>>    > point which is sending the sendonly offer has no idea what the other end point is willing to receive and their PT
>>    > preferences. The PT in sendonly are in the direction to sendonly end point, They are simply placeholders and will not be used.
>> 
>>    If so, we should either explicitly specify it, or reference to where
>>    it is already specified.
>> 
>> 
>> We will probably need to clarify how asymmetric PT in each direction
>> work with offer/answer. There is a lot of confusion regarding this issue
>> as well.
> 
> I agree it would be a good idea to do that.

I do as well.

-G




> 
> 	Thanks,
> 	Paul
> 
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