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Re: [Sip] INFO message belongs only to INVITE dialog usage?

Paul Kyzivat <pkyzivat@cisco.com> Thu, 31 May 2007 15:21 UTC

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Date: Thu, 31 May 2007 11:20:47 -0400
From: Paul Kyzivat <pkyzivat@cisco.com>
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To: Nina Garaca <nina.garaca@zesium.com>
Subject: Re: [Sip] INFO message belongs only to INVITE dialog usage?
References: <465E9331.8070909@zesium.com>
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My understanding is consistent with what dialogusage says - INFO is 
specific to the INVITE dialog usage. But off the top of my head I can't 
recall where that is specified.

	Paul

Nina Garaca wrote:
> Hi all,
> 
> I have read rfc2976 - The SIP INFO Method, but I haven't really 
> understood that INFO message belongs only to INVITE dialog usage, which 
> however draft-ietf-sipping-dialogusage-04 claims in its part 5.3:
> 
> 
>      5.3. Matching requests to usages
> 
> 
> 
>   For many mid-dialog requests, identifying the usage they belong to is
>   obvious.  A dialog can have at most one invite usage, so any INVITE,
>   UPDATE, PRACK, ACK, CANCEL, BYE, or INFO requests belong to it.
> 
> So my, question is:
>    Can INFO message  belong to other usages, besides INVITE, such are  
> SUBSCRIBE  or REFER?
> 
> Thanks in advance,
> Nina.
> 


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