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    • 40. 发明授权
    • Methods and apparatus for providing emergency telephone service to IP-based telephone users
    • 为基于IP的电话用户提供紧急电话服务的方法和设备
    • US07843934B2
    • 2010-11-30
    • US10457111
    • 2003-06-09
    • Robert T. BaumJim Curry
    • Robert T. BaumJim Curry
    • H04L12/28
    • H04L45/60H04L29/12018H04L29/12028H04L29/12122H04L29/1216H04L29/12226H04L45/00H04L45/54H04L45/742H04L61/10H04L61/103H04L61/1547H04L61/157H04L61/2015
    • For purposes of servicing emergency calls, such as 911 calls, a telephone number is associated with each edge router port used to provide IP service to a customer premise location. A telephone number is associated with the edge router port and the corresponding customer location. The telephone number and location information are stored in a database used for providing emergency calling party location information. When a switch used for routing IP calls detects a telephone call to an emergency call center it determines the edge router port from which the call was placed and the telephone number associated with the port for emergency call purposes. The call is then forwarded to the emergency call service center with the determined telephone number being supplied as the calling party number. Performing a lookup operation using the supplied telephone number the emergency service operator determines the location from which the call was placed.
    • 为了维护紧急呼叫(例如911呼叫),电话号码与用于向客户驻地提供IP服务的每个边缘路由器端口相关联。 电话号码与边缘路由器端口和相应的客户位置相关联。 电话号码和位置信息存储在用于提供紧急呼叫方位置信息的数据库中。 当用于路由IP呼叫的交换机检测到对紧急呼叫中心的电话呼叫时,它确定呼叫所在的边缘路由器端口和与该端口相关联的电话号码用于紧急呼叫目的。 然后将呼叫转发到紧急呼叫服务中心,确定的电话号码被提供为呼叫方号码。 使用提供的电话号码执行查找操作,紧急服务操作员确定呼叫所在的位置。