RE: [dispatch] WG Review: Call Control UUI for SIP (cuss)

At least from my perspective (which is from supporting the capabilities of the ISDN User-to-User service) the answer is No. This is information above the SIP layer in an application, and to look at the contents, one must come out above the SIP layer into that application. 

It could be conditional that the SIP message itself is not processed if the information is not there, and the SIP request therefore rejected, but this has nothing to do with the contents. And personally, I do not believe that bit will every happen at a proxy, but will be at the recipient UA.

regards

Keith

> -----Original Message-----
> From: dispatch-bounces@ietf.org 
> [mailto:dispatch-bounces@ietf.org] On Behalf Of Cullen Jennings
> Sent: Thursday, July 15, 2010 3:06 PM
> To: Gonzalo Camarillo
> Cc: DISPATCH list; IESG IESG; IETF-Discussion list
> Subject: Re: [dispatch] WG Review: Call Control UUI for SIP (cuss)
> 
> 
> I don't think this resolves the issue. The issue is if this 
> information is used for a call control. Basically do proxies 
> need to be able to look at this to make decision about what 
> they are going to do. We at least need a Yes/No answer to 
> this question from the proponents of this work and the 
> charter to make that clear. 
> 
> 
> On Jul 14, 2010, at 2:25 AM, Gonzalo Camarillo wrote:
> 
> > Hi,
> > 
> > thanks for your comments on the charter proposal. Per the comments 
> > received, we will modify bullet 5 as follows so that it is clearer:
> > 
> > OLD:
> > 5. SIP elements may need to apply policy about passing and screening
> >   the information.
> > 
> > NEW:
> > 5. SIP elements may need to apply policy about passing and filtering
> >   UUI.  The included application, encoding, semantics, and content
> >   information will allow endpoint or intermediary SIP elements to
> >   allow or block UUI based on the type and originator, not based on
> >   the actual UUI data, which may be end-to-end encrypted by the
> >   application.
> > 
> > Further discussions on this topic should happen on the 
> mailing list of 
> > this WG.
> > 
> > Cheers,
> > 
> > Gonzalo
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> 
> 
> Cullen Jennings
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