公开(公告)号：US07224672B2

公开(公告)日：2007-05-29

申请号：US09964900

申请日：2001-09-27

Applicant: Yasuhiro Arai

Inventor： Yasuhiro Arai

IPC: H04J1/02 ,  H04L12/26 ,  H04M3/22

CPC classification number: H04L1/243

Abstract: A reception result of an analog signal transmitted from a local switch to a subscriber line, or a voltage difference corresponding to a line current is analyzed, and a transmission characteristic in the subscriber line is evaluated based on an analyzing result. The transmission characteristic is sent to a network by use of a function of an analog transmitting unit. Noises having power of a predetermined threshold value or more are detected from a data signal input to a digital transmitting unit, and a periodicity of the noises is examined, whereby influences of the cyclic noises are evaluated, and an examination result is sent to the network by use of the function of the analog transmitting unit. As a result, provided is an xDSL modem capable of automatically collecting various characteristics of the subscriber line connected thereto prior to a start of a provision of a broadband communication service.

Abstract translation: 分析从本地交换机向用户线路发送的模拟信号的接收结果或对应于线路电流的电压差，并且基于分析结果评估用户线路中的传输特性。 通过使用模拟发送单元的功能将传输特性发送到网络。 从输入到数字发送单元的数据信号中检测出具有预定阈值或更大的功率的噪声，并且检查周期性噪声，从而评估循环噪声的影响，并将检查结果发送到网络 通过使用模拟发送单元的功能。 结果，提供了一种能够在开始提供宽带通信服务之前自动收集与其连接的用户线路的各种特性的xDSL调制解调器。

公开(公告)号：US07218861B2

公开(公告)日：2007-05-15

申请号：US10081234

申请日：2002-02-25

Applicant: Hirofumi Totsuka ,  Kazuo Kubo ,  Kuniaki Motoshima

Inventor： Hirofumi Totsuka ,  Kazuo Kubo ,  Kuniaki Motoshima

IPC: H04B10/00

CPC classification number: H04L1/243

Abstract: An optical transceiver 1 comprises first and second pseudo-random pattern generators 23 and 28 for generating a pseudo-random pattern signal, which are placed in a transmitting side path 6 and in a receiving side path 11 of the optical transceiver 1, respectively; first and second pseudo-random pattern detectors 21 and 26 for evaluating an inputted pseudo-random pattern signal, which are placed in the transmitting side path 6 and in the receiving side path 11 of the optical transceiver 1, respectively; a first loopback path 31 that loops back from a multiplexing circuit 3 to a demultiplexing circuit 8; and a second loopback path 32 that loops back from a light-electricity converter 7 to an electricity-light converter 4.

Abstract translation: 光收发机1包括分别放置在光收发器1的发送侧路径6和接收侧路径11中的第一和第二伪随机模式发生器23和28，用于产生伪随机模式信号， 第一和第二伪随机模式检测器21和26，用于分别放置在光收发器1的发送侧路径6和接收侧路径11中的输入伪随机模式信号; 从复用电路3回到解复用电路8的第一环回路径31; 以及从光电转换器7回送到电光转换器4的第二环回路径32。

公开(公告)号：US07212496B1

公开(公告)日：2007-05-01

申请号：US10029662

申请日：2001-12-18

Applicant: Raymond L Chong

Inventor： Raymond L Chong

IPC: G01R31/08 ,  G08C15/00 ,  H04L1/00

CPC classification number: H04L1/243 ,  H04M11/062

Abstract: A remote test unit (RTU) and method of operation are provided for utilizes the ability of an access matrix ability to route signals. The RTU can emulate a central Digital Subscriber Line Modem (DSLM-C) for testing customer premises equipment containing a remote Digital Subscriber Line Modem (DSLM-R). The RTU can also emulate a DSLM-R for testing central offices equipment including a digital subscriber line access multiplexer (DSLAM) containing a DSLM-C. The RTU can also emulate a concentrator connected to the DSLAM, a router connected to the concentrator, an Internet service provider (ISP) connected to the router, and a web site connected to the ISP over the Internet. The RTU can further test, using emulation, ISO/OSI layers defined in the ISO/OSI reference model which are connected to the DSLAM.

Abstract translation: 提供远程测试单元（RTU）和操作方法，以利用访问矩阵能力来路由信号的能力。 RTU可以模拟中央数字用户线路调制解调器（DSLM-C），用于测试包含远程数字用户线路调制解调器（DSLM-R）的客户驻地设备。 RTU还可以模拟DSLM-R，用于测试中心局设备，包括包含DSLM-C的数字用户线路接入复用器（DSLAM）。 RTU还可以模拟连接到DSLAM的集线器，连接到集中器的路由器，连接到路由器的因特网服务提供商（ISP）以及通过因特网连接到ISP的网站。 RTU可以使用仿真进一步测试连接到DSLAM的ISO / OSI参考模型中定义的ISO / OSI层。

公开(公告)号：US20070063741A1

公开(公告)日：2007-03-22

申请号：US11233598

申请日：2005-09-22

Applicant: Tony Tarango ,  Bryan Doucette

Inventor： Tony Tarango ,  Bryan Doucette

IPC: H03K9/08

CPC classification number: H04L1/243

Abstract: A method for testing a data recovery circuit (DRC) includes disturbing a running variable in a closed control loop of the DRC, as the DRC is processing a received test signal. Data recovered by the DRC, while the DRC was affected by the disturbance, is evaluated. Other embodiments are also described and claimed.

Abstract translation: 用于测试数据恢复电路（DRC）的方法包括在DRC处理接收到的测试信号时干扰DRC的闭合控制环路中的运行变量。 由刚果民主共和国恢复的数据，而刚果民主共和国受到干扰的影响。 还描述和要求保护其他实施例。

公开(公告)号：US20060280133A1

公开(公告)日：2006-12-14

申请号：US11257748

申请日：2005-10-25

Applicant: Yuji Nomura ,  Takeshi Yasuie

Inventor： Yuji Nomura ,  Takeshi Yasuie

IPC: H04L5/14

CPC classification number: H04L1/243 ,  H04L12/40136

Abstract: A full duplex/half duplex mismatch is detected by a full duplex/half duplex mismatch detecting apparatus connected through a network to a host. The loss rate of the transmission of a check messages is compared according to a sequential transmission pattern and the loss rate of the transmission of the check message according to divided transmission patterns by the full duplex/half duplex mismatch detecting apparatus, and if the loss rate of the transmission of the check messages according to the sequential transmission pattern is the larger, a full duplex/half duplex mismatch is determined to be present on the network path.

公开(公告)号：US20060215744A1

公开(公告)日：2006-09-28

申请号：US11086523

申请日：2005-03-22

Applicant: Peter O'Neill

Inventor： Peter O'Neill

IPC: H04B17/00 ,  H04B1/38 ,  H04J3/14

CPC classification number: H04L1/206 ,  H04L1/243

Abstract: A test system is capable of performing parallel modulation error measurement of transceivers using a loop-back configuration. Each transceiver includes a transmitter and a receiver. A signal generator generates a first modulated signal for input to the receivers of the transceivers. A tester is operable to measure a first demodulation error produced by the receiver in response to the first modulated signal and to measure a modulation error of the transmitter based on the first demodulation error and a second demodulation error. The second demodulation error is produced by the receiver in response to a second modulated signal generated by the transmitter and coupled from the transmitter to the receiver.

公开(公告)号：US07111208B2

公开(公告)日：2006-09-19

申请号：US10287951

申请日：2002-11-05

Applicant: Tuan M. Hoang ,  Hongtao Jiang

Inventor： Tuan M. Hoang ,  Hongtao Jiang

IPC: G01R31/28 ,  H04L12/26 ,  H04B1/38

CPC classification number: H04L1/243

Abstract: A method and system are disclosed for providing standalone built-in self-testing of a transceiver chip. The transceiver chip includes packet generators for generating test packets and packet checkers for comparing received packets with expected packets. The transceiver chip may be configured for testing through at least two wraparound test paths—a first test path that includes an elastic FIFO of a transmit path of the transceiver chip, and a second test path that includes an elastic FIFO of a receive path of the transceiver chip. During testing, the test packets are generated by packet generators within the transceiver chip and routed through the at least two wraparound test paths to packet checkers within the same transceiver chip. The packet checkers compare the returned packets to the expected packets. If the returned packets are inconsistent with the expected packets, the transceiver chip is defective.

Abstract translation: 公开了用于提供收发器芯片的独立内置自检的方法和系统。 收发器芯片包括用于生成测试分组的分组生成器和用于将接收到的分组与预期分组进行比较的分组检查器。 收发器芯片可以被配置用于通过至少两个环绕测试路径进行测试 - 第一测试路径包括收发器芯片的发送路径的弹性FIFO，以及第二测试路径，其包括：接收路径的弹性FIFO 收发芯片。 在测试期间，测试分组由收发器芯片内的分组生成器产生，并通过至少两个环绕测试路径发送到同一收发器芯片内的分组检测器。 数据包检查器将返回的数据包与预期的数据包进行比较。 如果返回的数据包与预期数据包不一致，则收发器芯片有故障。

公开(公告)号：US07093172B2

公开(公告)日：2006-08-15

申请号：US10291078

申请日：2002-11-08

Applicant: Nong Fan ,  Tuan Hoang ,  Hongtao Jiang

Inventor： Nong Fan ,  Tuan Hoang ,  Hongtao Jiang

IPC: G01R31/28 ,  H04L5/16 ,  H04L12/26

CPC classification number: H04L1/243 ,  H04L1/203 ,  H04L1/241

Abstract: A test packet generator (225a) within a physical layer device (230) may generate test packets to be communicated over a closed communication path established within the physical layer device (230). The test packets may include a pseudo-random bit sequence. A receiver within the physical layer device (230) may receive at least a portion of the generated test packet. A test packet checker (225b) within the physical layer device may compare at least a portion of the received test packets with at least a portion of the generated test packets in order to determine the bit error rate for the physical layer device. A window counter (225c) within the physical layer device (230) may count at least a portion of a number of bits received within the generated test packets and a number of bits that are in error in at least a portion of the number of bits received. Accordingly, the bit error rate may be calculated based on a ratio of the number of counted bits in error to the number bits counted in the at least a portion of the number of bits received.

Abstract translation: 物理层设备（230）内的测试分组生成器（225a）可以生成要通过在物理层设备（230）内建立的封闭通信路径进行通信的测试分组。 测试分组可以包括伪随机比特序列。 物理层设备（230）内的接收器可以接收生成的测试分组的至少一部分。 物理层设备内的测试分组检查器（225b）可以将所接收的测试分组的至少一部分与生成的测试分组的至少一部分进行比较，以便确定物理层设备的误码率。 物理层设备（230）内的窗口计数器（225c）可以对所生成的测试分组内接收到的多个比特的数量的至少一部分进行计数，并且在该数量的至少一部分中计数错误的比特数 收到的位。 因此，可以基于错误的计数比特数与在所接收的比特数的至少一部分中计数的比特比的比率来计算误码率。

公开(公告)号：US07051252B2

公开(公告)日：2006-05-23

申请号：US10077614

申请日：2002-02-15

Applicant: Brian L. Smith ,  Jurgen Schulz

Inventor： Brian L. Smith ,  Jurgen Schulz

IPC: G01R31/28

CPC classification number: H04L1/243 ,  G01R31/2853 ,  G01R31/31716

Abstract: A method and mechanism for testing communication links. A transmitter contact, or transmission point, is assigned a unique identifier. During a given test, the transmitter conveys a test pattern to a receiver via a link. Following this test pattern, the transmitter transmits a bit of its unique identifier to the receiver. The receiver receives both the test pattern and the identifier bit, and determines whether the received test pattern matches an expected value. If the test pattern was correctly received by the receiver, the receiver transmits the received identifier bit back to the transmitter. However, if the received test pattern is not correct, the receiver complements the received identifier bit and transmits the complemented bit back to the transmitter. The transmitter receives the identifier bit from the receiver and determines whether it matches the identifier bit which was originally transmitted by the transmitter. If the returned identifier bit does not match what was originally transmitted, the transmitter records an error.

Abstract translation: 一种用于测试通信链路的方法和机制。 发射机联系人或传输点被分配唯一的标识符。 在给定的测试期间，发射机通过链路向接收机传送测试模式。 在该测试模式之后，发射机向接收机发送其唯一标识符的位。 接收机接收测试模式和标识符位，并且确定所接收的测试模式是否与预期值匹配。 如果接收机正确接收到测试模式，则接收机将接收到的标识符位发送回发射机。 然而，如果接收到的测试模式不正确，则接收机补充接收到的标识符位，并将补码位发送回发送器。 发射机从接收机接收标识符比特，并确定它是否与原始由发射机发射的标识符比特匹配。 如果返回的标识符位不匹配最初发送的标识位，则发送器记录错误。

公开(公告)号：US20050276226A1

公开(公告)日：2005-12-15

申请号：US10865167

申请日：2004-06-10

Applicant: Dennis Musser ,  Marin Moreno

Inventor： Dennis Musser ,  Marin Moreno

IPC: H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L1/24 ,  H04L12/26 ,  H04L12/40 ,  H04N7/173 ,  H04N17/00

CPC classification number: H04N17/00 ,  H04L1/243 ,  H04N7/17309 ,  H04N17/004 ,  H04N21/6168

Abstract: A system and method for establishing a return path in a cable television test environment. A cable television test environment comprising a plurality of head-ends connected to a plurality of set top boxes through a one-way forward matrix switch having “M” inputs and “N” outputs is adapted to provide a reverse path for each of the available “N” outputs. A low band reverse signal is received from each of a plurality of set top boxes. The low band reverse signal from each of the plurality of set top boxes is combined to produce a composite signal. The composite signal is split into a plurality of composite signal sources. Each of the composite signal sources is sent to each of the plurality of head-ends (M) via the transmission means connecting that head-end to the matrix switch. The low band composite QPSK signal from the source diplexer travels in the reverse direction to the head-end. Each head-end is assigned a unique set of frequencies for return communications from the STBs serviced by that head-end. A QPSK demodulator in a head-end demodulates its assigned return frequencies as they appear in the low band composite QPSK signal.

Abstract translation: 一种用于在有线电视测试环境中建立返回路径的系统和方法。 包括通过具有“M”个输入和“N”个输出的单向正向矩阵开关连接到多个机顶盒的多个头端的有线电视测试环境适于为每个可用的 “N”输出。 从多个机顶盒中的每一个接收低频带反向信号。 来自多个机顶盒中的每一个的低频带反向信号被组合以产生复合信号。 复合信号被分成多个复合信号源。 每个复合信号源通过将该头端连接到矩阵开关的传输装置发送到多个头端（M）中的每一个。 来自源双工器的低频带复合QPSK信号在与前端相反的方向上行进。 为每个前端分配一组唯一的频率，用于从该头端服务的STB返回通信。 前端的QPSK解调器解调其分配的返回频率，因为它们出现在低频带复合QPSK信号中。