Re: [Sipping-tispan] Requirements -02h

Michael Hammer (mhammer) wrote:
> Paul,
> 
> This would suggest that so long as one terminal belonging to the AoR has
> the capability to accept another call *and* that terminal was recently
> used by the user

This is the weak spot in the whole service.

If the callee has been alerted without success once, there is need for 
some algorithm to decide when to try again. *Any* change in state of any 
registered UA may be considered justification for trying again. But even 
that isn't a great huristic. I may have been gone all afternoon, and 
have recently returned. I am now available though I have not recently 
used any terminal. I would think that even in the absence of any state 
change, another attempt should be made periodically.

> (hopefully the correct human),

I think by definition any human that can cause the terminal to answer is 
a correct human. Certainly that is the assumption when regular calls 
arrive, and I see no reason why it should be different here.

> an attempt should be
> made to complete using that terminal (plus any terminal that can accept
> a call independent of activity - could be broadcast to all).
> 
> Boy, hope that presence system is smart.

One that can detect "someone is now in the area" would be good.

	Paul

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