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The first use of a national emergency telephone number began in the United Kingdom in 1937 using the number 999, which continues to this day. [6] In the United States, the first 911 service was established by the Alabama Telephone Company and the first call was made in Haleyville, Alabama, in 1968 by Alabama Speaker of the House Rankin Fite and answered by U.S. Representative Tom Bevill.
That caller location information is automatically transmitted to dispatch centers when the 911 call comes in. It shows up on a 911 call taker's screen, sometimes plotted on a map.
The National Emergency Number Association (NENA) long-term solution for emergency calling, referred to as the i3 Solution, assumes end-to-end Internet Protocol (IP) signaling from the Voice over IP (VoIP) endpoint to an IP-enabled Public Safety Answering Point (PSAP), with callback and caller location information provided to the PSAP with the call.
CAD systems may be interconnected with automatic vehicle location systems, mobile data terminals, office telephones, and selective calling and push-to-talk ID.. Computer-assisted dispatch systems use one or more servers located in a central dispatch office, which communicate with computer terminals in a communications center or with mobile data terminals installed in vehicles.
If you call 911 by accident and don't respond, or call with a non-emergency issue, the operator must dispatch police to your location,” the expert continued. “This is done for legitimate reasons.
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Enhanced 911 (E-911 or E911) is a system used in North America to automatically provide the caller's location to 911 dispatchers. 911 is the universal emergency telephone number in the region. In the European Union, a similar system exists known as E112 (where 112 is the emergency access number) and known as eCall when called by a vehicle.
In addition to calling 911 from a phone, it intends to enable the public to transmit text (see Text-to-911), images, video and data to the 911 center (referred to as a public safety answering point, or PSAP). The initiative also envisions additional types of emergency communications and data transfer. [1]