[Scan-DC] 911's fatal flaw?

[Jeff Krauss]

As I recall, the carriers were required to provide caller locations 
to the PSAPs before most phones had GPS chips.
They initially used a system called multilateration that calculated 
location based on the time difference of arrival of a signal at 
multiple receive sites.
But I thought that cell phones now also use A-GPS.
https://en.wikipedia.org/wiki/Assisted_GPS


At 03:11 AM 10/28/2016, Alan Henney wrote:

>Interesting article/story on 9-1-1 location ability.
>
>http://wjla.com/news/local/911s-fatal-flaw
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