公开(公告)号：US06977507B1

公开(公告)日：2005-12-20

申请号：US10331221

申请日：2002-12-30

申请人： Donald Pannell ,  William Lo ,  Yiqing Guo

发明人： Donald Pannell ,  William Lo ,  Yiqing Guo

IPC分类号： G01R31/02 ,  G01R31/11 ,  H04M3/28

CPC分类号： H04M3/28 ,  G01R31/021 ,  G01R31/11

摘要： A system comprises a physical layer device that is adapted to communicate with a cable medium and that includes a first input/output terminal. A first transceiver communicates with the first input/output terminal and the cable medium. A cable tester tests the cable medium and determines a cable status. An indicator communciates with the physical layer device and identifies at least one of link presence, link abscence, link activity, link duplex and or link speed of the first input/output terminal during normal operation. The cable tester also uses the indicator to indicate at least one of cable testing status during the test and/or the cable status after the test.

摘要翻译： 一种系统包括适于与电缆介质通信并且包括第一输入/输出端子的物理层设备。 第一收发器与第一输入/输出端子和电缆介质通信。 电缆测试仪测试电缆介质并确定电缆状态。 指示符与物理层设备通信，并且在正常操作期间识别第一输入/输出终端的链路存在，链路异常，链路活动，链路双工和/或链路速度中的至少一个。 电缆测试仪还使用指示器在测试中指示电缆测试状态和/或测试后的电缆状态中的至少一个。

公开(公告)号：US07012436B1

公开(公告)日：2006-03-14

申请号：US11093101

申请日：2005-03-29

申请人： Donald Pannell ,  William Lo ,  Yiqing Guo

发明人： Donald Pannell ,  William Lo ,  Yiqing Guo

IPC分类号： G01R31/02

CPC分类号： G01R31/083 ,  G01R31/088 ,  G01R31/11

摘要： A physical layer device is adapted to communicate with a cable medium and communicates with an indicator. The physical layer device includes a first input/output terminal, a first transceiver that communicates with the first input/output terminal that is adapted to be connected to a cable medium, and a cable tester that tests the cable medium and determines a cable status using a pretest module. The pretest module senses activity on the cable medium and enables testing if activity is not detected for a first period, and a test module that is enabled by said pretest module, transmits a test pilse on the cable medium, measures a reflection amplitude and calculates a cable length. The cable tester determines the cable status based on the measured amplitude and the calculated cable length, and the indicator indicates at least one of cable testing status during the test and the cable status after the trst. The indicator also inducates at least one of link presence, link absence, link acitivty, link duplex and link speed of the first input/output terminal during normal operation.

摘要翻译： 物理层设备适于与电缆介质通信并与指示器通信。 物理层设备包括第一输入/输出端子，与适于连接到电缆介质的第一输入/输出端子通信的第一收发器，以及测试电缆介质并且使用 一个预测试模块。 预测试模块感测电缆介质上的活动，并且能够测试在第一时间段内是否没有检测到活动，并且由所述预测试模块启用的测试模块在电缆介质上传送测试薄片，测量反射幅度并计算 电缆长度。 电缆测试仪根据测量的幅度和计算出的电缆长度来确定电缆状态，并且指示灯表示测试期间的电缆测试状态和trst之后的电缆状态中的至少一个。 该指示器还在正常操作期间引入第一输入/输出端子的链路存在，链路缺失，链路活动性，链路双工和链路速度中的至少一个。

公开(公告)号：US07002354B1

公开(公告)日：2006-02-21

申请号：US10967602

申请日：2004-10-18

申请人： Donald Pannell ,  William Lo ,  Yiqing Guo

发明人： Donald Pannell ,  William Lo ,  Yiqing Guo

IPC分类号： G01R31/11

CPC分类号： G01R31/083 ,  G01R31/088 ,  G01R31/11

摘要： A physical layer device that is adapted to communicate with a cable medium and that includes an indicator comprises a first input/output terminal and a first transceiver that communicates with the first input/output terminal that is adapted to be connected to the cable medium. A detector detects a power over Ethernet (POE) device. A switching device selectively provides power from a power supply over the cable medium when the detector detects the POE device. A cable tester communicates with the first transceiver, tests the cable medium and determines a cable status, and delays testing of the cable medium when the detector detects the POE device until the switching device provides the power. The indicator indicates at least one of cable testing status during the test and the cable status after the test.

摘要翻译： 适于与电缆介质通信并且包括指示符的物理层设备包括与适于连接到电缆介质的第一输入/输出终端通信的第一输入/输出终端和第一收发器。 检测器检测以太网供电（POE）设备。 当检测器检测到POE设备时，开关设备选择性地通过电缆介质从电源提供电力。 电缆测试器与第一收发器通信，测试电缆介质并确定电缆状态，并且当检测器检测到POE设备直到交换设备提供电源时，延迟对电缆介质的测试。 该指示器表示测试期间的电缆测试状态和测试后的电缆状态中的至少一个。

公开(公告)号：US06992491B1

公开(公告)日：2006-01-31

申请号：US10990176

申请日：2004-11-16

申请人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

发明人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

IPC分类号： G01R31/11

CPC分类号： G01R31/021 ,  G01R31/11

摘要： A cable tester tests cable and determines a cable pass/fail status. A pretest module senses activity on the cable and selectively enables testing based on the sensed activity. A test module is enabled by the pretest module, transmits a test pulse on the cable, measures a reflection amplitude, and calculates a cable length. The cable status includes an open status, a short status, and a normal status. The test module determines the cable status of the cable based on the cable at least one of passing and failing A out of B cable tests. The test module determines the cable status for each of the B tests based on the measured amplitude and the calculated cable length.

摘要翻译： 电缆测试仪测试电缆并确定电缆通过/失败状态。 预测试模块感测电缆上的活动，并选择性地启用基于感测到的活动的测试。 测试模块由预测试模块使能，在电缆上发送测试脉冲，测量反射幅度，并计算电缆长度。 电缆状态包括打开状态，短状态和正常状态。 测试模块根据电缆确定电缆的电缆状态，B电缆测试中至少有一个通过和失败的A。 测试模块根据测量的幅度和计算的电缆长度来确定每个B测试的电缆状态。

公开(公告)号：US08179144B1

公开(公告)日：2012-05-15

申请号：US13023410

申请日：2011-02-08

申请人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

发明人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

IPC分类号： G01R31/11

CPC分类号： H04L43/50 ,  G01R31/11 ,  H04L12/10

摘要： A network device including a physical layer (PHY) device and an autonegotiation module. The PHY device is configured to interface with N cable pairs, where N is greater than 1. The PHY device includes a cable test module configured to diagnose a short circuit in one of the N cable pairs. The autonegotiation module is configured to i) selectively perform autonegotiation to establish a link with a link partner at one of a first link speed and a second link speed that is lower than the first link speed, and ii) select between the first link speed and the second link speed in response to the cable test module diagnosing the short circuit.

摘要翻译： 一种包括物理层（PHY）设备和自动协商模块的网络设备。 PHY设备被配置为与N个大于1的N个电缆对接口。PHY设备包括被配置为诊断N个电缆对之一中的短路的电缆测试模块。 自动协商模块被配置为：i）选择性地执行自动协商以便以低于第一链路速度的第一链路速度和第二链路速度中的一个建立与链路伙伴的链路，以及ii）在第一链路速度和 响应于电缆测试模块诊断短路的第二链路速度。

公开(公告)号：US07683628B1

公开(公告)日：2010-03-23

申请号：US12148161

申请日：2008-04-17

申请人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

发明人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

IPC分类号： G01R31/11

CPC分类号： H04B3/46

摘要： A physical layer device includes a cable test module that transmits a test pulse on a cable, measures a reflection amplitude, calculates a cable length, and determines a cable status based on the measured amplitude and the calculated cable length. A frequency synthesizer selectively outputs a plurality of signals at a plurality of frequencies on one end of the cable. An insertion loss calculator receives the signals from an opposite end of the cable and estimates insertion loss based on the received signals.

摘要翻译： 物理层设备包括在电缆上传输测试脉冲的电缆测试模块，测量反射幅度，计算电缆长度，并且基于所测量的振幅和所计算的电缆长度确定电缆状态。 频率合成器以电缆一端的多个频率有选择地输出多个信号。 插入损耗计算器从电缆的相对端接收信号，并基于所接收的信号来估计插入损耗。

公开(公告)号：US07075283B1

公开(公告)日：2006-07-11

申请号：US11254384

申请日：2005-10-20

申请人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

发明人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

IPC分类号： G01R31/11

CPC分类号： G01R27/04 ,  G01R31/11

摘要： A physical layer device including a first port and a second port comprises a cable tester that communicates with the first and second ports and that determines a cable status, which includes an open status, a short status, and a normal status. Opposite ends of a cable selectively communicate with the first and second ports. The cable tester includes a test module that transmits a test pulse on the cable, measures reflection amplitude, calculates a cable length, and determines the cable status based on the measured amplitude and the calculated cable length. A frequency synthesizer communicates with the cable and that selectively outputs a plurality of signals at a plurality of frequencies on the first port. An insertion loss calculator receives the signals on the second port and that estimates insertion loss.

摘要翻译： 包括第一端口和第二端口的物理层设备包括与第一和第二端口通信并且确定包括打开状态，短状态和正常状态的电缆状态的电缆测试器。 电缆的相对端部与第一和第二端口选择性地通信。 电缆测试仪包括一个在电缆上传输测试脉冲的测试模块，测量反射幅度，计算电缆长度，并根据测量的振幅和计算的电缆长度来确定电缆状态。 频率合成器与电缆通信，并且选择性地以第一端口上的多个频率输出多个信号。 插入损耗计算器接收第二端口上的信号并估计插入损耗。

公开(公告)号：US07002353B1

公开(公告)日：2006-02-21

申请号：US10400864

申请日：2003-03-27

申请人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

发明人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

IPC分类号： G01R31/11

CPC分类号： H04L1/248 ,  H04L43/50

摘要： A physical layer device communicates with a second physical layer device over a cable. The physical layer device includes a cable tester that identifies when the second physical layer device is disconnected from the cable. The cable tester includes a test initiating circuit that initiates a cable test when a link is lost, a test module that transmits test pulses on the pairs of the cable, measures reflection amplitudes, calculates cable lengths, and determines whether the pairs have said open status based on said measured amplitude and said calculated cable length, and a reporting circuit that generates a disconnect signal when at least one of the pairs has an open status.

摘要翻译： 物理层设备通过电缆与第二物理层设备通信。 物理层设备包括电缆测试器，其识别何时第二物理层设备与电缆断开连接。 电缆测试器包括测试启动电路，当链路丢失时启动电缆测试，测试模块在电缆对上传输测试脉冲，测量反射幅度，计算电缆长度，并确定对是否具有打开状态 基于所述测量的幅度和所述计算的电缆长度，以及报告电路，当所述对中的至少一个具有打开状态时，生成断开信号。

公开(公告)号：US06825672B1

公开(公告)日：2004-11-30

申请号：US10165467

申请日：2002-06-07

申请人： William Lo ,  Yiqing Guo

发明人： William Lo ,  Yiqing Guo

IPC分类号： G01R3111

CPC分类号： H04M3/28 ,  G01R31/021 ,  G01R31/11

摘要： A cable testing system and method tests cable and determines status, cable length and reflection amplitude. The test module includes a pretest state machine that senses activity on the cable and enables testing if activity is not detected for a first period. A test state machine is enabled by the pretest state machine, transmits a test pulse on the cable, measures a reflection amplitude and calculates a cable length. The test module determines the status based on the measured amplitude and the calculated cable length. A lookup table includes a plurality of sets of reflection amplitudes as a function of cable length. The test module determines the status using the lookup table, the reflection amplitude and the cable length.

摘要翻译： 电缆测试系统和方法测试电缆并确定状态，电缆长度和反射幅度。 测试模块包括一个预测状态机，它检测电缆上的活动，并能够测试在第一个周期内是否没有检测到活动。 测试状态机由预测状态机使能，在电缆上发送测试脉冲，测量反射幅度并计算电缆长度。 测试模块根据测量的幅度和计算的电缆长度来确定状态。 查找表包括作为电缆长度的函数的多组反射幅度。 测试模块使用查找表，反射幅度和电缆长度来确定状态。

公开(公告)号：US07403018B1

公开(公告)日：2008-07-22

申请号：US11895372

申请日：2007-08-24

申请人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

发明人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

IPC分类号： G01R31/11 ,  G01R31/02

CPC分类号： G01R31/021 ,  G01R31/11

摘要： A cable tester that tests cable and that determines a cable status includes a pretest module that senses activity on pairs of the cable and that selectively enables testing based on the sensed activity. A test module is enabled by the pretest module, transmits a test pulse on one of the pairs, measures a reflection amplitude and calculates a cable length. The cable status includes an open status, a short status, and a normal status. The test module determines the cable status based on the measured amplitude and the calculated cable length. The test module measures received signals on at least one other pair after transmitting the test pulse on the one of the pairs, compares the received signals on the at least one other pair to a predetermined threshold, and determines a pair short status between the one of the pairs and the at least one other pair if the received signals exceed the predetermined threshold.

摘要翻译： 测试电缆并确定电缆状态的电缆测试仪包括一个预测试模块，用于检测电缆对上的活动，并根据感测到的活动选择性地启用测试。 测试模块由预测试模块启用，在一对上发送测试脉冲，测量反射幅度并计算电缆长度。 电缆状态包括打开状态，短状态和正常状态。 测试模块根据测量的幅度和计算的电缆长度来确定电缆状态。 所述测试模块在所述一对上发送所述测试脉冲之后，测量至少另一对上的接收信号，将所述至少一个其他对上的接收信号与预定阈值进行比较，并且确定所述至少一个之间的一对短状态 所述对和所述至少一个其他对，如果所接收的信号超过所述预定阈值。