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    • 13. 发明授权
    • Loop integrity test device and method for digital subscriber line (XDSL) communication
    • 用于数字用户线(XDSL)通信的环路完整性测试设备和方法
    • US06366644B1
    • 2002-04-02
    • US08929778
    • 1997-09-15
    • James R. SiskJohn F. McHale
    • James R. SiskJohn F. McHale
    • H04M124
    • H04L43/50H04M3/301H04M3/306H04M11/062H04Q1/028
    • A digital subscriber line (xDSL) communication system (10) is disclosed that allows xDSL communication across a local loop. The system (10) includes a local loop termination point (14) and customer premises equipment (12) connected to a twisted pair telephone line (16). Loop integrity test devices (22, 24) for xDSL communication are located at the local loop termination point (14) and the customer premises equipment (12) and are coupled to the telephone line (16). The loop integrity test devices (22, 24) are respectively operable to transmit test signatures across the telephone line (16), to receive and evaluate test signatures from the telephone line (16), and to indicate whether the telephone line (16) can support xDSL communication based upon evaluation of test signatures.
    • 公开了允许通过本地环路进行xDSL通信的数字用户线路(xDSL)通信系统(10)。 系统(10)包括连接到双绞线电话线(16)的本地环路终端点(14)和客户端设备(12)。 用于xDSL通信的环路完整性测试设备(22,24)位于本地环路终端点(14)和客户驻地设备(12)处并耦合到电话线路(16)。 环路完整性测试设备(22,24)可分别用于在电话线路(16)上传输测试签名,以接收和评估来自电话线路(16)的测试签名,并指示电话线路(16)是否可以 基于测试签名的评估来支持xDSL通信。