[82501] in North American Network Operators' Group
Re: Vonage Selects TCS For VoIP E911 Service
daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Wed Jul 20 09:22:09 2005
Date: Wed, 20 Jul 2005 15:19:02 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Andre Oppermann <nanog-list@nrg4u.com>
Cc: Michael.Dillon@btradianz.com, nanog@merit.edu
In-Reply-To: <42DE4B6E.7090209@nrg4u.com>
Errors-To: owner-nanog@merit.edu
On Wed, 20 Jul 2005, Andre Oppermann wrote:
> This is unlikely. GPS reception is usually determined by sight of
> horizon. For example the navigation system in my car has trouble
Looking at:
http://people.howstuffworks.com/location-tracking4.htm
"Phase II - The final phase requires carriers to place GPS receivers in
phones in order to deliver more specific latitude and longitude location
information. Location information must be accurate within 164 to 984 feet
(50-300 meters)."
It does look like the requirements in E911 are designed around what can be
done via cellphone based location services without GPS (ie some kind of
distance to towers/angle approach).
--
Mikael Abrahamsson email: swmike@swm.pp.se
