Hello!

Just trying to implement XEP-0167: Jingle RTP Sessions in my client software. 
There's something, I can't understand.
According to 5. Negotiating a Jingle RTP Session, instances should start 
exchange media just after session-accept sent and acknowledged and connectivity 
established. To play RTP media stream, receiving party needs SDP, which could 
be build, using <payload-type/> element attributes. But session-accept stanza 
may have <description/> element, which contains more than one <payload-type/> 
element. And it says, that any of them could be used. How receiving party can 
determine, which payload type uses sending party, to generate SDP to play media 
stream?

With my best regards,
                                   Konstantin
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