Hi Yang,

Based on a little reading on H.239, it sounds like it is a conference feature set, which would be implemented using SIP, RTP, various SDP extensions for media labeling and grouping, and XCON protocols such as BFCP for floor control and possibly CCMP for conference control.

As such, you won't find one document that describes all these protocols, and most of the action happens outside of SIP. If you have trouble finding some of these protocols, let me know.

Also, discussion on this would probably be most productive on the XCON list.

Thanks,
Alan


poplarbird wrote:

Hi All,

I am currently working on the interworking between SIP and H323.

I had difficult in finding the status of SIP supporting dual video (e.g. H.239 from a H.323 endpoint).

Are there any drafts or standards working on it?

Also with the text chatting in a SIP call, if anyone can give me the RFC number that would be great.

Thanks,

Yang

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