Re: [Sip] Comments on draft-kaplan-sip-info-events-00

On Dec 3, 2007, at 2:36 PM, Dale.Worley@comcast.net wrote:

>    From: Adam Roach <adam@nostrum.com>
>
>    I had it in my head many years ago that overlapping NITs were  
> illegal
>    also, but I couldn't ever find any supporting text in RFCs. I  
> think it
>    was in some pre-publication versions of 2543-bis, but got pulled  
> out
>    before finalization.
>
> I think that overlapped transactions is a basic feature of SIP.  (The
> UAC has to be able to deal with the occasional 500 Out Of Order
> situation, of course.)

Yes, but just because the protocol can handle overlapped NITs doesn't  
mean the application should send them that way. If you have  
sequential data that needs to be delivered in order (for example,  
MESSAGE requests) you have to sequence the requests at the  
application level.

--
Dean

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