E 9-1-1 (Enhanced 911) is support for wireless phone users who dial 911, the standard number for requesting help in an emergency. Since wireless users are often mobile, some sort of enhancement is needed to 911 服务 that allows the location of the user to be known to the call receiver. E911 support is mandated by the U.S. Federal Communications Commission (FCC) for traditional mobile phone 服务 and, 5月19日起, 2005, 对某些 网络电话 服务. Phase 1 of the E911 program required a 服务 provider to provide the telephone number of a 911 caller and the location of the antenna receiving the call to a local 公共安全 Answering Point (PSAP). Phase 2 requires the provider to furnish more precise information about the caller's location, usually to within 50 to 300 meters. Phase 2, which requires new technology, is to be completed by the end of 2005.

桃县 is fortunate to have a highly-skilled, well-equipped E 9-1-1 Department. For more information download this PDF Document.