Questions about the status of dual video feature in SIP

"poplarbird" <[email protected]>
Newsgroups gmane.ietf.sip
Message-ID <[email protected]> 
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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