Re: AW: AW: [Sipping-tispan] TISPAN requirements, first requiements

You are missing a case.  The distinction is whether the caller is 
anonymous to the network as well as to the called party.  So one of the 
ACR cases is when the network has the identity of the caller but will 
not disclose it due to operation of the Privacy service.

Miguel Garcia wrote:
> So what is an anonymous user? An anonymous user is one for which his 
> identity is not determined. The reason why a user is anonymous is 
> another story (the user want, or the network can't provide an identity), 
> but they are anonymous in both cases.
> 
> /Miguel
> 
> Tom-PT Taylor wrote:
> 
>> I think your requirement is not quite accurate even at this level of 
>> abstraction.  Roland has identified two different cases.  One is your 
>> "certain anonymous users", but the other is the case where the user 
>> identity is unable due to the network's inability to provide it.
>>
>> I guess I can see your point about pushing too hastily to mechanism. 
>> Roland actually identified the information that might be used to 
>> resolve the issue at the rejection point: on the one hand, the 
>> identity of the caller if present in a P-A-Id, and on the other hand, 
>> the absence of a P-A-Id.  It may be that this is all that is needed, 
>> and no further discussion is required in SIPPING.  (Of course, that's 
>> assuming that the number of authorized caller identities any one 
>> rejection point has to keep track of is limited and provisionable.)
>>
>> Miguel Garcia wrote:
>>
>>> Tom:
>>>
>>> I agree with you in the essence, but you are referring to a solution, 
>>> not to a requirement. Essentially, whenever you need to speak about 
>>> an "indicator", it raises an alarm in my head that you are speaking 
>>> about a possible solution rather than a requirement.
>>>
>>> So the requirement is tha there are certain anonymous users that are 
>>> not subject to be filtered by ACR. Then we can further discuss the 
>>> solution, which is probably going in the direction you suggest.
>>>
>>> /Miguel
>>>
...

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