RE: AW: AW: [Sip] SIPIT Interop problem with ;user=phone

[Juha Heinanen <jh@tutpro.com>]

hisham.khartabil@nokia.com writes:

 > When if I hand you this on a business card:
 > 
 > Phone: 0401234567
 > 
 > and one of your colleagues hands you this:
 > 
 > SIP: 0401234567@tutpro.com
 > 
 > What do you dial to call me and what do you dial to call your
 > colleague, using your phone? How does your proxy tell the difference?

what would the phone network do if someone in india dials the number you
gave?  it would do the same as my proxy:  route the call to a
destination in a wrong local network or declare the destination
unreachable.

it is thus the responsibility of the user to figure out, how to turn
0401234567 into something that is correctly routable by the proxy of
that user the user might, for example, try to figure out from the
address on the business card in which country the person lives and then
add the corresponding cc into the number.  

that is what people do every day when they have to deal with local phone
numbers in other regions.  i don't understand why we discuss this on a
mailing list of a standards body.

-- juha

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