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Re: [sipcore] About Join and Replaces Headers:

gao.yang2@zte.com.cn Mon, 27 September 2010 15:45 UTC

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To: Paul Kyzivat <pkyzivat@cisco.com>
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Subject: Re: [sipcore] About Join and Replaces Headers:
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Paul,

> An INVITE with Join or Replaces has its own offer/answer to negotiate 
> the media used. If the new party wants to use less (or more) media than 
> the existing call it can just negotiate that.

Yes, the new party can put less(or more) m= lines in the SDPs. But the 
UAS's behavior for the new party's INVITE request is not clear.

Considering Join header, there's no such defintion in RFC3911.

Thanks,

Gao


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