The form of the user part is really the responsibility of the owner of
the domain. user=phone is really only meaningful if the domain owner
allows/supports that. In absence of user=phone, the domain may *choose*
to treat the user part according to tel uri syntax, or not.
*if* user=phone is present, and *if* the domain supports use of
user=phone, then a user part that doesn't start with "+" must be a local
number in accord with telephone-subscriber, as Iñaki says below.
Paul
Iñaki Baz Castillo wrote:
> El Viernes 05 Marzo 2010, hanifa.mohammed escribió:
>> Thanks for the response. Pl clarify my assumption.
>>
>> 1. So, when there is no "user=phone" parameter in the SIP uri, there is no
>> context of Local or Global.
>> Or is there any other way to figure out whether a SIP uri is global or
>> local?
>> 2. Simply the presence of '+' in the userinfo part of the SIP uri is not
>> suffice enough to declare it as
>> a global SIP uri.
>
> If ;user=phone is present you can assume that the SIP URI userinfo is a
> telephone-subscriber number, following same rules (if it begins with "+" then
> it's absolute). In order to be local it would be like:
>
> sip:12345678;phone-context=mydomain....@provider.com
>
>
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