[e2e] 911 and cell phones

Cannara cannara at attglobal.net
Fri Apr 1 21:20:44 PST 2005

In fact, both infrastructure and end nodes know where the caller is.  Which is
where the trust & security of the wired POTS system originates -- the physical
line has a trusted, internal identifier no one but the telco ever knows, and
our cellphones each have unique identifiers we never see, but which the
services must know in order to locate us.  While we may think our phone
numbers are what identify us and our locations, they do not.  They're just
names on proprietary tables of unique internal system identifiers.


"Bari, Farooq" wrote:
> Can the end device be trusted in such matters? Can someone sitting in
> say Europe make a VoIP emergency call in US? Should not it be like trust
> but verify?
> > -----Original Message-----
> > From: end2end-interest-bounces at postel.org [mailto:end2end-interest-
> > bounces at postel.org] On Behalf Of John Wroclawski
> > Sent: Friday, April 01, 2005 9:36 AM
> > To: Bob Braden; Black_David at emc.com; dpreed at reed.com
> > Cc: end2end-interest at postel.org
> > Subject: Re: [e2e] 911 and cell phones
> >
> > At 9:06 AM -0800 4/1/05, Bob Braden wrote:
> > >What does this topic have to do with the end-to-end
> principle/practice?
> > >
> > >Bob Braden
> >
> > Actually, it does seem to - when you strip lots of detail away a key
> > question seems to be the architectural choice of "end system knows
> > where it is and tells the dispatcher" vs "infrastructure expected to
> > know where the thing using it is". Interesting that both VoIP and
> > cellular tech are apparently pushing the architecture towards a more
> > e2e model.
> >
> > --john

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