Re: [sipcore] Dialog state - Scope in draft-ietf-sipcore-reinvite

Hi Gao,

yes, your understanding is correct.

Cheers,

Gonzalo

On 22/07/2010 1:25 PM, gao.yang2@zte.com.cn wrote:
> 
> Hi Gonzalo,
> 
> I am glad to find that it's still my origial understanding.
> 
> Then, technically:
> 
> Without precondition: completion of O/A as commitment or UA have sent or
> received media using the new parameters.
> 
> With preconditon: UAS send media/RTCP/TCP as commitment or a new O/A
> without preconditon(in some cases, I think a new O/A is necessary, as
> some parameters modification can not be checked from RTCP/TCP).
> 
> I'd like to double check for my understanding from you, is it right?
> 
> Thanks,
> 
> Gao
> 
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> 
> *Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>*
> 发件人:  sipcore-bounces@ietf.org
> 
> 2010-07-22 16:13
> 
> 	
> 收件人
> 	"gao.yang2@zte.com.cn" <gao.yang2@zte.com.cn>
> 抄送
> 	SIPCORE <sipcore@ietf.org>
> 主题
> 	Re: [sipcore] Dialog state - Scope in draft-ietf-sipcore-reinvite
> 
> 
> 	
> 
> 
> 
> 
> 
> Hi Gao,
> 
> you do not need the media check if you have had an offer/answer exchange
> without preconditions. The sentence in the draft has an "or" separating
> those two conditions.
> 
> Cheers,
> 
> Gonzalo
> 
> On 22/07/2010 10:57 AM, gao.yang2@zte.com.cn wrote:
>>
>> Gonzalo,
>>
>>> the successful completion of any offer/answer exchange without
>>> preconditions means commitment. In your example, offer/answer 1 already
>>> means commitment.
>>
>> Then, why the RTCP/TCP checked is needed for O/A without precondition?
>> It puzzles me.
>>
>> Thanks,
>>
>> Gao
>>
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