What is 9-1-1?
Nine-one-one is the number most people in the U.S. and some in International countries call to get help in a police, fire or medical emergency. A 9-1-1 call goes over dedicated phone lines to the 9-1-1 answering point closest to the caller, and trained personnel then send the emergency help needed.

What is Enhanced 9-1-1?
Enhanced 9-1-1, or E9-1-1, is a system which routes an emergency call to the correct 9-1-1 center, AND automatically displays the caller's phone number and address. The 9-1-1 call taker will typically ask the caller to verify the information, which appears on his or her computer screen. In many areas, phone number and location information is not yet available for 9-1-1 calls made from a cellular/wireless phone.