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公开(公告)号：US6026145A
公开(公告)日：2000-02-15
申请号：US211338
申请日：1998-12-14
摘要： An automated telephone line test system that is well suited for determining the location of faults within a telephone network. The telephone line test system uses time domain reflectometry to aid in locating the faults. The time domain reflectometry unit is connected through a switch in the network so that the time domain reflectometry unit can be connected to multiple lines without human intervention. Parameters of the time domain reflectometry signals are controlled so that reflections from the switch do not interfere with measurement of parameters on the faulty line.
摘要翻译： 一种自动化电话线路测试系统，非常适用于确定电话网络内故障的位置。 电话线测试系统使用时域反射测量来帮助定位故障。 时域反射单元通过网络中的交换机连接，使得时域反射单元可以连接到多条线路而无需人为干预。 控制时域反射信号的参数，使得来自开关的反射不会干扰故障线路上的参数测量。
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公开(公告)号：US5699402A
公开(公告)日：1997-12-16
申请号：US311802
申请日：1994-09-26
摘要： A line test system for diagnosing and segmenting faults in a switched telephone network. The system includes a remote measurement unit installed at a switch and a test system controller. The test system controller stores data about operating parameters of each of the subscriber lines when they are believed to be free of faults. When a fault is reported, the parameters are measured again. By comparison of the measured parameters with the stored parameters, the fault can be segmented between the premise and the network. Segmentation is performed using knowledge based analysis techniques. The actual source of the fault once it is repaired is also stored by the test system controller. This historical information is used to improve the accuracy of the knowledge based analysis techniques used for segmentation.
摘要翻译： 一种用于诊断和分段交换电话网络故障的线路测试系统。 该系统包括安装在开关和测试系统控制器上的远程测量单元。 当它们被认为没有故障时，测试系统控制器存储关于每个用户线路的操作参数的数据。 报告故障时，再次测量参数。 通过比较测量参数与存储的参数，故障可以在前提和网络之间进行分段。 使用基于知识的分析技术进行分割。 修复后的故障实际来源也由测试系统控制器存储。 该历史信息用于提高用于分割的基于知识的分析技术的准确性。
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公开(公告)号：US06895081B1
公开(公告)日：2005-05-17
申请号：US09294563
申请日：1999-04-20
申请人： Kurt E. Schmidt , David J. Groessl , Yun Zhang
发明人： Kurt E. Schmidt , David J. Groessl , Yun Zhang
IPC分类号： H04L29/14 , G06Q10/06 , H04B3/46 , H04L1/00 , H04L25/02 , H04M3/00 , H04M3/30 , H04M11/00 , H04Q3/42 , H04M1/24 , H04M3/08 , H04M3/22
CPC分类号： G06Q10/06 , H04B3/46 , H04L1/0003 , H04L25/022 , H04M3/306 , Y02D50/10
摘要： A method characterizes a customer line for data transmission. The method includes measuring electrical properties of the customer line from a central location, identifying a line model from the measurements, and identifying a modem model for a modem selected for use with the customer line. The modem model gives performance data for the selected modem. The method also predicts performance data for the customer line when operated with the selected modem by combining the line and modem models.
摘要翻译： 一种用于数据传输的客户线路的特征。 该方法包括从中心位置测量客户线路的电气特性，从测量中识别线路模型，以及为选择用于客户线路的调制解调器识别调制解调器模型。 调制解调器模型给出所选调制解调器的性能数据。 该方法还通过组合线路和调制解调器模型来预测用所选调制解调器操作时客户线路的性能数据。
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公开(公告)号：US07263174B2
公开(公告)日：2007-08-28
申请号：US11060904
申请日：2005-02-18
申请人： Kurt E. Schmidt , David J. Groessl , Yun Zhang
发明人： Kurt E. Schmidt , David J. Groessl , Yun Zhang
CPC分类号： G06Q10/06 , H04B3/46 , H04L1/0003 , H04L25/022 , H04M3/306 , Y02D50/10
摘要： A method characterizes a customer line for data transmission. The method includes measuring electrical properties of the customer line from a central location, identifying a line model from the measurements, and identifying a modem model for a modem selected for use with the customer line. The modem model gives performance data for the selected modem. The method also predicts performance data for the customer line when operated with the selected modem by combining the line and modem models.
摘要翻译： 一种用于数据传输的客户线路的特征。 该方法包括从中心位置测量客户线路的电气特性，从测量中识别线路模型，以及为选择用于客户线路的调制解调器识别调制解调器模型。 调制解调器模型给出所选调制解调器的性能数据。 该方法还通过组合线路和调制解调器模型来预测用所选调制解调器操作时客户线路的性能数据。
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公开(公告)号：US06590962B1
公开(公告)日：2003-07-08
申请号：US09598595
申请日：2000-06-21
申请人： David J. Groessl , Kurt E. Schmidt , Yun Zhang
发明人： David J. Groessl , Kurt E. Schmidt , Yun Zhang
IPC分类号： H04M124
摘要： A method and apparatus to non-interactively test telephone networks and more specifically to localize faults such as resistive faults in the subscriber loop of the telephone network is presented. The method and apparatus determine whether the fault is in the tip line or ring line of a phone line. The existence of a fault voltage, if any, is also determined. The resistance of the tip line to ground and the resistance of the ring line to ground is measured. A fault resistance is calculated from this information, from which the location of the fault is determined.
摘要翻译： 提出了一种非交互式测试电话网络的方法和装置，更具体地说是定位电话网络的用户环路中的电阻性故障等故障。 该方法和装置确定故障是否在电话线的尖端线或环线上。 还确定了故障电压的存在（如果有的话）。 测量尖端线对地的电阻和环线对地的电阻。 根据该信息计算故障电阻，确定故障位置。
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公开(公告)号：US5870451A
公开(公告)日：1999-02-09
申请号：US965360
申请日：1997-11-06
摘要： A line test system for diagnosing and segmenting faults in a switched telephone network. The system includes a remote measurement unit installed at a switch and a test system controller. The test system controller stores data about operating parameters of each of the subscriber lines when they are believed to be free of faults. When a fault is reported, the parameters are measured again. By comparison of the measured parameters with the stored parameters, the fault can be segmented between the premise and the network. Segmentation is performed using knowledge based analysis techniques. The actual source of the fault once it is repaired is also stored by the test system controller. This historical information is used to improve the accuracy of the knowledge based analysis techniques used for segmentation. The line test system is capable of detecting the presence of high impedance ringers. Information on high impedance ringers is used to distinguish between lines that contain open circuit faults and lines that are terminated with high impedance ringers.
摘要翻译： 一种用于诊断和分段交换电话网络故障的线路测试系统。 该系统包括安装在开关和测试系统控制器上的远程测量单元。 当它们被认为没有故障时，测试系统控制器存储关于每个用户线路的操作参数的数据。 报告故障时，再次测量参数。 通过比较测量参数与存储的参数，故障可以在前提和网络之间进行分段。 使用基于知识的分析技术进行分割。 修复后的故障实际来源也由测试系统控制器存储。 该历史信息用于提高用于分割的基于知识的分析技术的准确性。 线路测试系统能够检测高阻抗振铃器的存在。 关于高阻抗振铃器的信息用于区分包含开路故障的线路和使用高阻抗振铃器终止的线路。
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公开(公告)号：US06741676B2
公开(公告)日：2004-05-25
申请号：US09410236
申请日：1999-09-30
申请人： Ilia L. Rudinsky , Kurt E. Schmidt
发明人： Ilia L. Rudinsky , Kurt E. Schmidt
IPC分类号： H04M124
CPC分类号： G06Q10/06 , H04B3/46 , H04L1/0003 , H04L25/022 , H04M3/306 , Y02D50/10
摘要： A method determines a structure of a subscriber line. The method includes searching a reference set for a match between the subscriber line and a model line of the reference set and identifying that the subscriber line has a specific physical structure. The match is based on electrical properties of the lines. The act of identifying is responsive to finding a match with one of the model lines that has the specific physical structure.
摘要翻译： 一种方法确定用户线路的结构。 该方法包括搜索用于参考集合的用户线路和模型线路之间的匹配的参考集合，并且识别用户线路具有特定的物理结构。 比赛是基于线路的电气特性。 识别的行为响应于找到具有特定物理结构的模型行之一的匹配。
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公开(公告)号：US5644617A
公开(公告)日：1997-07-01
申请号：US371734
申请日：1995-01-12
申请人： Kurt E. Schmidt
发明人： Kurt E. Schmidt
摘要： Apparatus and method for testing lines. The apparatus is particularly useful for testing lines in a switched network, such as might be used to electronically route telephone and computer data lines to various offices in an office building. The apparatus includes an AC test source and a DC measurement device located at a near end switch. A DC transform circuit is located at a far end switch. According to the test method, an AC test signal is injected onto a line under test at the near end. At the far end, the received signal is converted to DC, which is sent to the near end. Line attenuation, and hence fault conditions, are detected by comparing the DC signal to the transmitted AC signal. Techniques to increase the signal to noise ratio of the DC signal are also disclosed.
摘要翻译： 线路测试装置和方法 该装置对于在交换网络中测试线路特别有用，例如可用于将电话和计算机数据线电路路由到办公楼中的各个办公室。 该装置包括位于近端开关处的AC测试源和DC测量装置。 DC变换电路位于远端开关。 根据测试方法，在近端将AC测试信号注入到被测线上。 在远端，接收的信号被转换成DC，发送到近端。 通过将DC信号与发送的AC信号进行比较来检测线路衰减，从而检测故障状况。 还公开了增加DC信号的信噪比的技术。
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公开(公告)号：US06389109B1
公开(公告)日：2002-05-14
申请号：US09410222
申请日：1999-09-30
申请人： Kurt E. Schmidt , Roger Faulkner
发明人： Kurt E. Schmidt , Roger Faulkner
IPC分类号： H04M124
摘要： A method detects a fault in a subscriber line having two wires with separate input impedances. The method includes driving the subscriber line from one end with an alternating voltage, making one-ended electrical measurements on the driven liner and determining from the measurements a quantity proportional to the phase difference of the two input impedances. The method also includes identifying a fault in response to the phase difference having a signature associated with presence of a fault in the line.
摘要翻译： 一种方法检测具有分离的输入阻抗的具有两条导线的用户线路中的故障。 该方法包括从一端以交流电压驱动用户线路，在从动衬管上进行一端电测量，并根据测量值确定与两个输入阻抗的相位差成正比的数量。 所述方法还包括响应于相位差识别故障，所述相位差具有与所述线中的故障的存在相关联的签名。
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公开(公告)号：US06385297B2
公开(公告)日：2002-05-07
申请号：US09285954
申请日：1999-04-02
申请人： Roger Faulkner , Kurt E. Schmidt , Yun Zhang
发明人： Roger Faulkner , Kurt E. Schmidt , Yun Zhang
IPC分类号： H04M124
摘要： A method and automatic test system for determining qualification of a twisted pair transmission line to propagate data signals. The method includes measuring phase imbalance in the twisted pair transmission line. The phase imbalance is determined by resistance imbalance in the twisted pair transmission line. The resistance imbalance is determined by applying a common mode voltage to the twisted pair transmission line; and, determining phase imbalance in the twisted pair in response to the applied common mode voltage. The method includes applying a common mode voltage to the twisted pair transmission line; determining phase imbalance if the twisted pair in response to the applied common mode voltage; detecting a peak in the determined phase imbalance; determining a frequency of the detected peak; determining line qualification in accordance with the determined frequency. Methods are provided using series resistive imbalance and phase measurements to discover the type of imbalance existing on a twisted pair transmission line which is unable to support data transmissions. Methods are provided using series resistive imbalance and phase measurements to determine where an imbalance occurs as well as the magnitude of the imbalance.
摘要翻译： 一种用于确定双绞线传输线的资格以传播数据信号的方法和自动测试系统。 该方法包括测量双绞线传输线中的相位不平衡。 相位不平衡由双绞线传输线中的电阻不平衡决定。 电阻不平衡通过对双绞线传输线施加共模电压来确定; 以及响应于所施加的共模电压确定所述双绞线中的相位不平衡。 该方法包括对双绞线传输线施加共模电压; 如果双绞线响应于所施加的共模电压，则确定相位不平衡; 检测确定的相位不平衡中的峰值; 确定检测到的峰值的频率; 根据确定的频率确定线路资格。 提供使用串联电阻不平衡和相位测量的方法来发现不能支持数据传输的双绞线传输线上存在的不平衡类型。 使用串联电阻不平衡和相位测量来提供方法来确定不平衡发生的位置以及不平衡的大小。
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