What is GPS? How does it work?
The GPS (Global Positioning System) locator chip, which is present in all wireless phones we currently sell, except the BlackBerry 6750, is used solely for tracking purposes by Emergency 911 Services and does not function like a typical GPS device.
Verizon Wireless cannot guarantee that you will be systematically located after dialing 911 from your wireless phone. In many places, Public Safety still relies on the caller's descriptions to locate those in need. Enhancements to the Public Safety 911 system will make it possible for Public Safety to read your callback number and to estimate your location. However, given the many variables with wireless radio service, no design will be perfect. There are three different phases that the FCC requires for this service. We have listed them below for your convenience:
- First: The FCC requires wireless carriers to provide Enhanced 911 call identification capability when requested by each of the approximately 6,000 state/local PSAPs nationwide.
- Second: The FCC's Phase I Enhanced 911 rules require wireless carriers to automatically provide PSAP (Public Safety Answering Points) with the telephone number of the 911 caller and the location of the cell site used to originate the 911 call.
- Third: Phase II Enhanced 911 rules requires wireless carriers to automatically provide the telephone number of the 911 caller and far more precise location information, within 50 to 100 meters in most cases.
The first two steps have been implemented, however the third step (Phase II) is still in progress. Please note: The deployment of Phase II E911 capability is complicated because it requires improvements to the capabilities of a number of parties -- vendors, wireless carriers, landline carriers and PSAPs -- to succeed. Also, the customer must have a Verizon Wireless GPS handset. Each party has to be absolutely certain that they are capable of supporting the required service enhancement when necessary.
Verizon Wireless has devoted significant resources to upgrading its nationwide network to be able to provide Phase II E911 service when requested by Public Safety. Until such time when the PSAPs upgrade their systems, calls made from E911-capable handsets to 911 call centers that are not yet equipped, will still go through as usual. However, the 911 call centers will not be able to read and use the GPS-generated location information and may still need to rely on the caller to identify the location of the emergency.
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