公开(公告)号：US07884615B1

公开(公告)日：2011-02-08

申请号：US12082964

申请日：2008-04-15

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

发明人： William Lo ,  Yiqing Guo ,  Tek 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 interface includes a physical layer (PHY) device that provides an interface to a cable. The PHY device includes an autonegotiation module that selectively performs autonegotiation to establish a link with a link partner based on link parameters and a cable test module that performs a cable test before the autonegotiation begins, that determines a cable performance parameter during the cable test, and that compares the cable performance parameter to a predetermined threshold. The autonegotiation module selects at least one of the link parameters based on the comparison.

摘要翻译： 网络接口包括提供与电缆的接口的物理层（PHY）设备。 PHY设备包括自动协商模块，所述自动协商模块选择性地执行自动协商以基于链路参数与链路伙伴建立链路，以及在自动协商开始之前执行电缆测试的电缆测试模块，其在电缆测试期间确定电缆性能参数;以及 其将电缆性能参数与预定阈值进行比较。 自动协商模块基于比较选择至少一个链路参数。

公开(公告)号：US07250771B1

公开(公告)日：2007-07-31

申请号：US11455359

申请日：2006-06-19

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

发明人： William Lo ,  Yiging Guo ,  Tek 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 comprises a test initiating module that performs B cable tests. Each of said B cable tests includes selectively transmitting a test pulse on the cable, measuring a reflection amplitude, and calculating a cable length. A test results module determines a cable status for each of said B cable tests based on said measured amplitude and said calculated cable length and that determines an overall cable status of the cable based on the cable at least one of passing and failing A out of B cable tests. A and B are integers greater than zero and B is greater than A.

摘要翻译： 电缆测试仪包括执行B电缆测试的测试启动模块。 所述B电缆测试中的每一个包括选择性地在电缆上发送测试脉冲，测量反射幅度以及计算电缆长度。 测试结果模块基于所述测量的幅度和所计算的电缆长度来确定每个所述B电缆测试的电缆状态，并且基于所述电缆确定所述电缆的整体电缆状态，所述电缆至少一个通过和失败的B中的A 电缆测试。 A和B是大于零的整数，B大于A.

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：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。

公开(公告)号：US07173431B1

公开(公告)日：2007-02-06

申请号：US10997119

申请日：2004-11-24

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： G01R31/02 ,  G01R31/11

CPC分类号： G01R31/021 ,  G01R31/11

摘要： A physical layer device communicates over a cable and includes a cable tester that determines a cable status, which includes an open status, a short status and a normal status. The cable tester includes a pretest module that 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, calculates a cable length, and determines the cable status based on the measured amplitude and the calculated cable length. A digital signal processor (DSP) communicates with the cable and that has a digital gain parameter. A cable length estimator communicates with the DSP and estimates cable length based on the digital gain parameter.

摘要翻译： 物理层设备通过电缆进行通信，并且包括确定电缆状态的电缆测试器，其包括打开状态，短状态和正常状态。 电缆测试仪包括一个预测试模块，用于检测电缆上的活动，并根据感测到的活动选择性地进行测试。 测试模块由预测试模块启用，在电缆上传输测试脉冲，测量反射幅度，计算电缆长度，并根据测量的幅度和计算出的电缆长度确定电缆状态。 数字信号处理器（DSP）与电缆通信并具有数字增益参数。 电缆长度估计器与DSP进行通信，并根据数字增益参数估计电缆长度。

公开(公告)号：US06995551B1

公开(公告)日：2006-02-07

申请号：US11066739

申请日：2005-02-25

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： G01R31/083 ,  G01R31/088 ,  G01R31/11

摘要： A physical layer device including a first port, a second port, and a cable that has one end that communicates with the first port and an opposite end that communicates with the second port. A cable tester tests the cable to determine a cable status, which includes an open status, a short status, and a normal status. A pretest module senses activity on the cable and selectively enables testing depending upon the sensed activity. A test module transmits a test pulse on the cable, measures a 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： 一种包括第一端口，第二端口和具有与第一端口通信的一端的电缆以及与第二端口通信的相对端的物理层设备。 电缆测试仪测试电缆以确定电缆状态，包括打开状态，短状态和正常状态。 预测试模块感测电缆上的活动，并根据感测到的活动选择性地启用测试。 测试模块在电缆上传输测试脉冲，测量反射幅度，计算电缆长度，并根据测量的幅度和计算的电缆长度确定电缆状态。 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。