[Enum] RE: [Geopriv] Re: [Simple] tel URIs in common policy

["Stastny Richard" <Richard.Stastny at oefeg.at>]

Jonathan wrote: 
> >
> > we need here sip:+1-232-555-1234 at foo.com;user=phone with
> > the same number to indicate the foo.com domain of the carrier
> > This is basically the essential information
> 
> Right, and this is an address.

Ok, let's say it is an address (in IETF terminology)

Just for avoidance of doubt:
A construct like sip:+1-232-555-1234 at foo.com;user=phone
does NOT indicate that foo.com is necessarily the 
carrier-of-record hosting the E.164 number. Therefor
your next statement does not hold for the to-field
(it may be true for the from field)
 
> >>Given this, the meaning of sip:<phone-number>@domain;user=phone
means
> >>that the domain is asserting ownership of the identity in the user
part,
> >>in this case a global phone number. As such, its appropriate to use
this
> >>form only when it is authoritatively known that the domain in
question
> >>"owns" that phone number.

Examples: this URI may be used to send a request from a UA to his proxy
in which case foo.com in most case does not have the ownership,
it is just indicating the digit dialled.
It is also used to send an invite to a gateway to the PSTN,
etc.

> 
> We have numerous specs covering conveyance and assertion of
identities.
> See in particular draft-rosenberg-sip-identity-privacy which talks
about
> how to properly support anonymous calling with
draft-ietf-sip-identity.

Will do and come back later on the CLI issue.

-richard

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