Re: [Sipping] Re: draft-elwell-sipping-service-retargeting-00.txt

[Dean Willis <[e-mail]>]

On Wed, 2005-10-19 at 09:22 -0400, David R Oran wrote:

> What we don't have a way of saying is "I'm busy, go try this other  
> place".
. . .
> A third way is to in fact invent a new 3xx which means exactly "Try  
> this other place because I'm busy" (as opposed to moved temporarily).
> 
> Why don't we just do the last of these? It's completely  
> straightforward to me.

At first glance, it sounds fine. But then people are going to want to
say "I'm busy to you because you're on my warn list, please try this
other contact " and "I'm busy because my QoS is saturated, please try
this other destination" and "I'm busy because I'm in a meeting, but I
could do text messaging too" and a million other things. We can't just
add a new response code for every one of these.

There are some fundamental problems with intertwingling applications
that use SIP with the SIP protocol itself, and I think that the path
you're suggesting leads to continuances of this layer violation model.

Of course, we could just accept that the application-protocol layer is
completely violated in the SIP model, and just make the best of what we
have. I suppose that is an alternative.

--
Dean



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