GPS for 911 calls

[Perry E. Metzger]

Harald Welte <laforge at openmoko.org> writes:
>> 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.

Ah, so the network does the work, not the phone. On CDMA I believe all
the phones do the signaling.

Perry