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：US07576548B1

公开(公告)日：2009-08-18

申请号：US11831670

申请日：2007-07-31

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： G01R31/02 ,  G01R31/11

CPC分类号： G01R31/021 ,  G01R31/11

摘要： A physical layer device includes a cable tester that determines a cable status of a cable and that includes a test module. The 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. An insertion loss estimator communicates with the cable tester, and estimates insertion loss of the cable based at least in part on a feedback equalizer gain.

摘要翻译： 物理层设备包括电缆测试器，其确定电缆的电缆状态并且包括测试模块。 测试模块在电缆上发送测试脉冲，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。 插入损耗估计器与电缆测试器通信，并且至少部分地基于反馈均衡器增益来估计电缆的插入损耗。

公开(公告)号：US07358745B1

公开(公告)日：2008-04-15

申请号：US11455467

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： H04L43/50 ,  G01R31/11 ,  H04L12/10

摘要： A physical layer device comprises a first transceiver that selectively communicates with a 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.

摘要翻译： 物理层设备包括选择性地与电缆介质通信的第一收发器。 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。