I do it on my SIP phone all the time.

I can put ANY SIP URI I want.

If it's a phone number, phone will append the default domain of the phone.

The other phone then INVITE the contact. The enterprise proxy looks at the
phone number and then decides if it owns it (e.g., it could be another phone
number of a phone in the enterprise). If it owns it, it will route the
INVITE to that phone. Never goes to PSTN. If it does not own it, it will
route to the appropriate PSTN gateway (based on least cost routing for
outbound PSTN gateways and such). That's what happens when I forward to my
cell phone.

The point of this story is that when ;user=phone is used, the routing is
based on the phone number. Like it or not, this is what seems to happen. In
other words, it's a functional equivalent to a Tel URI.

There is a reason why people do it like this. Try sending a Tel URI on the
wire and see what happens with most equipment out there.


On Apr12 2008 12:26 , "Juha Heinanen" <[EMAIL PROTECTED]> wrote:

> Hadriel Kaplan writes:
> 
>> Open-source phones I assume.  Or the SER or Asterisk or whatever
>> could probably be programmed to do it for your phone.
> 
> haven't seen any.  sip is now about 10 years old and even such a basic
> thing as redirecting a caller to my cell phone is not yet possible.
> 
> -- juha

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