On Mon, 2009-04-13 at 19:27 -0400, Paul Kyzivat wrote:
> Hey, you mean that is actually *used*!
> 
> Its nice to learn that what started out as a weird corner case or only 
> theoretical interest actually turns up in practice!

It turns out to be useful if you are trying to accumulate "busy" status
information for an AoR.  In theory, you can just send a dialog event
SUBSCRIBE to the AoR, but that tends to get forked to the voicemail
server, etc.  What you really want to do is subscribe to reg events for
the AoR, and then do individual dialog event subscriptions to every
contact for the AoR.  That way, you're talking directly to each
line-appearance of the AoR.  And if you can get a GRUU for a contact,
you subscribe using the GRUU rather than the stated contact URI, because
that is more likely to avoid NAT problems, etc.

Dale


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