RE: [Sip] REFER and Replaces with early dialogs

[Alan Johnston <alan.johnston@wcom.com>]

Hi Jean-Francois,

The latest version of this draft is:

 
http://search.ietf.org/internet-drafts/draft-ietf-sip-replaces-00.txt

and now allows Replaces to match an early dialog. The Service Examples
I-D will soon be updated to show some of these flows. 

Thanks,
Alan Johnston
WorldCom
sip:alan@siptest.wcom.com

> -----Original Message-----
> From: sip-admin@ietf.org [mailto:sip-admin@ietf.org] On 
> Behalf Of JF Rey
> Sent: Thursday, February 14, 2002 8:20 AM
> To: sip@ietf.org
> Subject: [Sip] REFER and Replaces with early dialogs
> 
> 
> I'm quite sure that someone already asked about this, but I 
> did not find it in the archives.
> 
> I try to understand whether a SIP phone can transfer another 
> one when the target of the transfer is ringing.
> 
> draft-biggs-sip-replaces-01.txt states that
> <DRAFT_QUOTE>
> The to-tag and from-tag parameters MUST be included in the 
> Replaces header, 
> </DRAFT_QUOTE>
> and
> <DRAFT_QUOTE>
> If the Replaces header matches an unestablished call leg, that it,
>    the INVITE request for the call has not received or been 
> sent a final
>    response, the Replaces header MUST be ignored. </DRAFT_QUOTE>
> 
> I don't understand the last sentence. Why ignore Replaces 
> even if a match was found thanks to it ?
> 
> In bis07, the to-tag is mandatory for 1xx (other than 100) 
> responses. So, Replaces 
> could match an early dialog as soon as a 1xx  (other than 
> 100) is sent/received.
> 
> Did I overlook something ?
> 
> Regards,
> 
> Jean-Francois Rey
> -- 
> 
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_______________________________________________
Sip mailing list  https://www1.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors@cs.columbia.edu for questions on current sip
Use sipping@ietf.org for new developments on the application of sip