On Oct 26, 2008, at 3:56 AM, Juha Heinanen wrote:

Iñaki Baz Castillo writes:

PD: Thanks for proposing a feasible solution instead of proposing exotic
specifications that depend on other specifications which nobody
implement.

i agree with this and long time ago (before presence existed) proposed a
similar (if not even simpler) solution:

- my phone receives a call from sip:[EMAIL PROTECTED]

- my phone sends a query to sip:[EMAIL PROTECTED] asking if [EMAIL PROTECTED] 
is trying to
 call me

in order for this to work, the phone from which sip:[EMAIL PROTECTED] is calling,
needs to be registered.

Not only that, but it needs to deal with forking, or it needs to require all the calls originating @bar go through the @bar proxy/sbc.

Jonathan may be right -- perhaps we should revisit the core SIP specs assuming universal deployment of SBCs. It still won't be right, but at least we'd get some new problems to chew on.

--
Dean

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