> > Agreed.
> > 
> > Cutting to the chase, I'd put the following on my business card:
> > 
> > tel: +1-408-495-2456
> > sip:[EMAIL PROTECTED]
> > mailto:[EMAIL PROTECTED]
> 
> Interestingly, that doesn't indicate that you are reachable 
> via sip using the numeric address.

Yes, I did that on purpose. I don't see a point in doing it.

> A sip caller given the tel might figure that out, but might 
> not. If you had user enum, and the caller used it, then all 
> is well. But if not, and if the caller just blasts the tel 
> uri to his SP, it may figure it out, and may not.
> 
> You are going to ask why the caller would use the tel form in 
> that case. 
> One reason would be because the UI of the device only 
> supports numeric input.

So, a SIP user (or anybody young enough to prefer IM paradigm to phone
paradigm) will use sip:[EMAIL PROTECTED]

The old luddites with a PSTN-looking phone will keep on dialing digits
on their phone. That's where the Tel URI is useful.

The niche market for sip:[EMAIL PROTECTED];user=phone is very 
small. Beyond people on this mailing list, I really don't see who would
care. I really believe that practically speaking, sip:[EMAIL 
PROTECTED];user=phone
is meant to be used "on-the wire" as opposed to by users.

sip:[EMAIL PROTECTED]                   ~= http://www.att.com
sip:[EMAIL PROTECTED];user=phone ~= 
http://www.att.com/gen/landing-pages?pid=3308

I think we are rat-holing on imaginary issues.
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