This isn't compatible with the current approach because in the current 
approach *every* INVITE or UPDATE impacts the session timer, either by 
renegotiating it or by turning it off.

        Paul

Harsha. R wrote:
> Brett,
> 
>> An outstanding session-expires mechanism should not prevent another from
>> occurring.  However there is a potential for race conditions concerning
>> knowing if UPDATE sent/received prior to INVITE 200 response.
> 
> Why cant this be addressed say using something like the SDP
> offer/answer semantics?
> a subsequent session refresh cant be made unless the previous request
> has been answered?
> 
> Regards
> Harsha
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