enhanced 911 (E911)
911 is the emergency call number for the USA and other American countries. It was prescribed by the Federal Communications Commission( FCC).
Emergency Call also goes by the name E911 (Enhanced 911) and, in an emergency, must transmit the position information of the person seeking help via mobile radio-based positioning. According to the FCC concept, the network operator must determine the position of the radio cell during emergency calls and provide precise information about the position of the mobile device.
The emergency number used in Europe is 112.