I don't have a problem with the interpretation. If it knows
what the
context means, then it is authoritative.
Brian
> -----Original Message-----
> From: Paul Kyzivat [mailto:pkyzivat cisco.com]
> Sent: Thursday, March 01, 2007 9:29 AM
> To: Brian Rosen
> Cc: iptelietf.org
> Subject: Re: [Iptel] draft-rosen-iptel-dialstring-06
>
>
>
> Brian Rosen wrote:
> > I have updated the draft, hopefully for the last
time.
> >
> > I replaced the ABNF with that suggested by Paul.
It is not legal, in my
> > opinion, to have just a pause/wait as a
dialstring, and so I used the
> > version he supplied which does not allow that
construction.
> >
> > With regard to the text on translation of a
dialstring to a phone
> number, I
> > tried to craft compromise language which would
meet the point raised by
> > Richard, and subsequently discussed by Francois
and Tom, plus the
> > observation by Paul.
> >
> > That paragraph now reads:
> > A proxy server or Back to Back User Agent
(B2BUA) [RFC3261] which is
> > authoritative for the context may translate the
dial string to a
> > telephone number or service invocation URI. The
telephone number MAY
> > be expressed as a global or local tel: URI, or
it MAY be left as a
> > sip: or sips: URI with the URI parameter value
changed from
> > "user=dialstring" to
"user=phone".
>
> This sounds good to me.
>
> > Note that this allows translation to a tel:, which
Richard asked for.
> It
> > leaves the text from the original that details the
change in the URI
> > parameter. I deleted the line about when the
translation is done,
> observing
> > that the first line of the paragraph states
"which is authoritative for
> the
> > context", which seems to meet the needs of
Tom and Francois.
> > "Authoritative" may not be the best
word, but I think it conveys the
> correct
> > intent. "which understands" would be
slightly more general, but less
> > informative I think.
>
> I think authoritative is probably ok, though we may end
up arguing about
> what it means. Lets consider a usecase:
>
> sip:1234;phone-context=brianrosen.netcisco.com;user=dialstring
>
> If a cisco.com proxy happens to have information about
the
> brianrosen.net context, can it consider itself to be
"authoritative" and
> do a translation? (I don't have any problem
interpreting it this way.)
>
> (Of course, *how* one would get the above url in the
first place is a
> good question. I think it would require a phone
configured for use on a
> cisco internal network that has a digit map for
brianrosen.net.)
>
> Paul
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