Re: [sipX-dev] Getting the status of a phone
On Fri, 2009-06-26 at 11:34 -0400, Scott Lawrence wrote:
> Where are you going with this?
I realized that GRUU instance-ids were an 80% solution. And then Robert
noted that the registration contact address was another 80% solution.
So I attempted to enumerate all possible solutions, and many of them
were 80% good as well.
> Phones don't reliably identify themselves uniquely in any way that both:
> a user can easily use, and the registrar can readily correlate.
Sigh, yes, it does look that way.
> As far
> as I can tell, unless we can configure some unique identifier into the
> Contact registered by the phone (a value selected by sipXconfig and put
> only into a phone-specific configuration, and uniquely identifiable in a
> registration), this problem is essentially intractable.
How about putting a suffix on the authentication user name (which the
authentication code knows to strip off)? That seems to be one datum
that every phone allows to be configured, and is sent to the registrar
in the clear.
> Any partial solution (one that works sometimes but is not completely
> reliable) is, as far as I can see, not really an improvement over the
> current situation.
And quite possibly worse...
Dale
