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RE: [SIP] 3PCC and the re-invite response

Igor Slepchin <ISlepchin@dynamicsoft.com> Fri, 01 December 2000 21:56 UTC

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From: Igor Slepchin <ISlepchin@dynamicsoft.com>
To: 'Brett Tate' <brett@broadsoft.com>, Igor Slepchin <ISlepchin@dynamicsoft.com>, Sip Mail List <sip@lists.bell-labs.com>
Subject: RE: [SIP] 3PCC and the re-invite response
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Date: Fri, 01 Dec 2000 16:53:12 -0500

> -----Original Message-----
> From: Brett Tate [mailto:brett@broadsoft.com]
> 
> My post was to solve the SDP exchange loop
> problem of using 3pcc to pull the subscribers
> off of hold.
> 
> Otherwise, the flow in the following post works.
> http://lists.bell-labs.com/pipermail/sip/2000q4/004391.html
> 

What I'm saying is that I don't see this as a problem with 3pcc at all.
Given Figure 1 in
http://search.ietf.org/internet-drafts/draft-rosenberg-sip-3pcc-01.txt, why
would A change the media in 200OK to the second INVITE? Instead of inventing
workarounds for eccentric UAs, it would be much easier to define what a
"sane" UA can and cannot do (e.g., it cannot change SDP just because it
received a re-INVITE, there should be another valid reason for the change).

---
Igor Slepchin


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