I can def be of help with this one. I currently work for the ambulance service actually dispatching ambulances 12hrs a day.
Recently the mobile phone providers have started using ROAMing calls. (recently as much as in last 3month). This facility enables your mobile to 'cherry pick' the strongest signal after your subscribed network. The only issue with this service is that the then recieving service doesnt automatically get your mobile number.
The triangulation of mobile phones also is done almost instantly. It will initally give us the transmitter the call was received from. Then if the signal is triangulated it gives us a percentage of probabilty of being in that area. again this information is lost if not using your normal provider. the message we get satates (1234) 567890 is 85% prob. to grid SE 12345,67891. This can then be made even more acurate with a phone call to the provider.
999/112 is exactly the same emergency operator, not a special dedicated mobile operator.
HTH
Recently the mobile phone providers have started using ROAMing calls. (recently as much as in last 3month). This facility enables your mobile to 'cherry pick' the strongest signal after your subscribed network. The only issue with this service is that the then recieving service doesnt automatically get your mobile number.
The triangulation of mobile phones also is done almost instantly. It will initally give us the transmitter the call was received from. Then if the signal is triangulated it gives us a percentage of probabilty of being in that area. again this information is lost if not using your normal provider. the message we get satates (1234) 567890 is 85% prob. to grid SE 12345,67891. This can then be made even more acurate with a phone call to the provider.
999/112 is exactly the same emergency operator, not a special dedicated mobile operator.
HTH