Iñaki Baz Castillo wrote:
> 2008/10/22 Iñaki Baz Castillo <[EMAIL PROTECTED]>:
>> Hi, SIP Presence Event Package RFC( 3856 ) says that From and To of a
>> SUBSCRIBE cannot be a TEL URI:
>>
>> Section 5.
>>
>> SUBSCRIBE messages also contain logical identifiers that define the
>> originator and recipient of the subscription (the To and From header
>> fields). These headers can take either a pres or SIP URI.
>>
>>
>> Why? Why is valid a PRES URI but not a TEL?
I can think of no reason why a TEL should not be permitted. Presumably
it would be routed the same way an INVITE would. Eventually that should
lead to some UA, perhaps a GW, perhaps a native sip device. Either way
the SUBSCRIBE *might* be supported. If the subscribe isn't supported
then an error is reported.
So I consider this a bug in the spec.
Thanks,
Paul
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