Re: draft-ietf-sip-199 use-cases

Hi, 

>>Case 1: You're a basic endpoint or PSTN Gateways the UAC, and have to
pick one of many 183 w/SDP responses for which to
>>play early media for.  Typically they pick the first one
>>received, and don't change until the 200 ok. (some pick the most
recently received one instead, but that's just Z
>>guessing too)  So if I call Bob, and it went to a simple
find-me-follow-me service, the service plays "we're looking 
>>for Bob, please hold...".  Once it finds Bob, and Bob's phone rings,
>>I would like my UAC to stop listening to the announcement and instead
switch to Bob's ringback.  So the proxy needs to
>>send my UAC the 199.
> 
>Correct. That is how many gateways/UACs work today, and one use-case 
>I've had in mind where 199 could be useful. The reaons I didn't add it 
>to the draft before was because it is not so much related to 
>resources, but more to early dialog policy, but for sure I could add 
>it to the draft.
>[JRE] Personally I think this is a more compelling use case.

I'll add it to the draft.

Regards,

Christer

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