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Re: [sipcore] About Join and Replaces Headers: //Replaces header's extension

"Worley, Dale R (Dale)" <dworley@avaya.com> Thu, 07 October 2010 16:30 UTC

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From: "Worley, Dale R (Dale)" <dworley@avaya.com>
To: "gao.yang2@zte.com.cn" <gao.yang2@zte.com.cn>
Date: Thu, 07 Oct 2010 12:28:45 -0400
Thread-Topic: [sipcore] About Join and Replaces Headers: //Replaces header's extension
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Subject: Re: [sipcore] About Join and Replaces Headers: //Replaces header's extension
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________________________________________
From: gao.yang2@zte.com.cn [gao.yang2@zte.com.cn]

> If user Y (using UA Z) sends an INVITE-with-Replaces to X, then the
> original dialog (between UAs X and Y) *must* be terminated by X when
> it accepts the INVITE-with-Replaces.

I knew it. But my proposal here is to do extension for the Replaces header. And you may refer to the first mail of this thread for details.
________________________________________

You are focusing on the fact that you want to replace the user's connection to a particular media stream.  But the Replaces header specifies whether or not a *dialog* is replaced by another *dialog*, not whether a particular media rendering is replaced by another.  The only way that you can associate two dialogs while keeping them both in existence is with Join.

I think your usage would be helped by adding extension attributes to SDP so that which media stream was to replace/be mixed with which other media streams (in a Join) could be specified.

Dale

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