Subject: Re: [Sip] Manyfolks questions

From: Gonzalo Camarillo <[email-masked]>
Date: Mon, 08 Jul 2002 10:55:43 +0300

Mark,

this is addressed in the second paragraph of page 10:

" Note that the rules above apply to the desired strength-tag "none" as
   well. This way, a user agent that supports quality of service but
   does not intend to use them, adds desired status lines with the
   strength-tag "none". Since this tag can be upgraded in the answer, as
   described in Section 5.2, the answerer can request quality of service
   reservation without a need of another offer/answer exchange.
"

This corresponds to your option number 2.

Gonzalo

Mark Watson wrote:
> 
> If the UAC knows of no preconditions for a session, but supports the
> manyfolks mechanism, what should it indicate in the INVITE in order to give
> the UAS the opportunity to indicate that it has (presumably local)
> preconditions ?
> 
> 1) Indicate 'Supported: preconditions' in the INVITE, but do not include
> a=cur: a=des: etc. in the SDP offer. Then the UAS can return the a=cur:
> a=des: in the SDP answer.
> 
> OR
> 
> 2) Indicate 'Supported: preconditions' in the INVITE and include the
> attributes but with desired status 'none'
> 
> If it's (1), we need description of the answerer adding the pre-condition
> attributes when they were not present in the offer.
> 
> If it's (2), then it should be mandatory to include the pre-condition
> attributes if you include 'Supported: preconditions'.
> 
> I couldn't find either in the specification, but perhaps I didn't look hard
> enough!
> 
> Regards,
> 
> Mark
> 
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_______________________________________________
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This list is for NEW development of the core SIP Protocol
Use [email-masked] for questions on current sip
Use [email-masked] for new developments on the application of sip