GPS for 911 calls
laforge at openmoko.org
Wed Mar 7 10:37:21 CET 2007
On Mon, Mar 05, 2007 at 06:56:08PM -0500, Perry E. Metzger wrote:
> Ian Stirling <openmoko at mauve.plus.com> writes:
> > Michael Welter wrote:
> >> What is the protocol for sending the GPS coordinates to the 911 dispatcher?
> > I don't think there is one protocol.
> > Unfortunately, I suspect a 'say GPS coordinates' button on the 911
> > screen may be the most compatible way.
> Wireless Enhanced 911 for mobiles, including GPS or other
> radiolocation data, is a US standard. I don't know how the signaling
> works, but if you are selling a new phone in the US, it is mandatory
> that you comply.
Please see http://en.wikipedia.org/wiki/E911#Wireless_Enhanced_911:
"however. TDMA and GSM networks such as Cingular and T-Mobile use TDOA"
which is location singulation based purely on the network. No device
support and no GPS needed for that.
- Harald Welte <laforge at openmoko.org> http://openmoko.org/
Software for the world's first truly open Free Software mobile phone
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