AW: [Sipping-tispan] Re: CCBS/CCNR in Version -02f

Hi 
comments inline
Regards, Christian

-----Ursprüngliche Nachricht-----
Von: Tessa Silvia [mailto:Silvia.Tessa@TILAB.COM] 
Gesendet: Montag, 26. September 2005 13:20
An: Miguel Garcia; Schmidt, Christian
Cc: sipping-tispan@ietf.org
Betreff: R: [Sipping-tispan] Re: CCBS/CCNR in Version -02f

Hi,
Comments inline.

> > REQ-CCBS/CCNR-xx: The caller must be able to invoke CCBS / CCNR
service.
> 
> Yes, sure... I think this is an obvious requirement for each service,
> isn't it. Do you think we need to state it explicitly?

I agree, we probably don't need to state it esplicitely.

Christian: The requirement document should list all requirements, especially
the requirements with potential influence to SIP. Because, this is valid
for REQ-CCBS/CCNR-xx, I would include it in the spec.

> 
> >
> > REQ-CCBS/CCNR-yy: If a CCBS service is invoked for a callee, other
> > terminating calls should not be offered to this callee.
> 
> Is this a true behaviour of the service? If someone invokes CCBS on
me,
> he will block automatically all my other calls to me? This sounds like
a
>   policy that certain network might have, but sounds a bit weird to
> write this as a requirement. Can anyone else comment?

We have already have REQ 12 stating that
	 Any communication performed as a result of the execution of a
CCBS/CCNR request should be distinguishable from regular communications.

So,  all terminating call are "distinguishable" and any policy a network
might have could be easily based on this, without further requirements.
Other views ?

Christian: I see, perhaps you can add a short explanation for this purpose:
	 Any communication performed as a result of the execution of a
CCBS/CCNR request should be distinguishable from regular communications.
This can be used to priorize CCBS/CCNR calls towards the callee.
What do you think?

Regards
Silvia

Gruppo Telecom Italia - Direzione e coordinamento di Telecom Italia S.p.A.

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