In July 1996 US Federal Communication Commission ( FCC ) issued the E-911 mandate stating that all wireless carriers must provide the fast location of an emergency caller to the appropriate public safety answering point. 1996年7月,美国联邦通信委员会(FCC)发布了E-911条例,要求移动通信运营商在求助者使用移动电话拨打紧急求助电话时,能够对其迅速定位。