JP4473327B2 - 伝送ラインのループ長・ブリッジタップ長を決定するためのシステムおよび方法 - Google Patents
伝送ラインのループ長・ブリッジタップ長を決定するためのシステムおよび方法 Download PDFInfo
- Publication number
- JP4473327B2 JP4473327B2 JP2008191009A JP2008191009A JP4473327B2 JP 4473327 B2 JP4473327 B2 JP 4473327B2 JP 2008191009 A JP2008191009 A JP 2008191009A JP 2008191009 A JP2008191009 A JP 2008191009A JP 4473327 B2 JP4473327 B2 JP 4473327B2
- Authority
- JP
- Japan
- Prior art keywords
- length
- loop
- bridge tap
- bridge
- loop length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
- H04B3/493—Testing echo effects or singing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/24—Testing correct operation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/24—Testing correct operation
- H04L1/245—Testing correct operation by using the properties of transmission codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0212—Channel estimation of impulse response
- H04L25/0216—Channel estimation of impulse response with estimation of channel length
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1438—Negotiation of transmission parameters prior to communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/08—Indicating faults in circuits or apparatus
- H04M3/085—Fault locating arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2227—Quality of service monitoring
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
- H04M3/305—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop testing of physical copper line parameters, e.g. capacitance or resistance
- H04M3/306—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop testing of physical copper line parameters, e.g. capacitance or resistance for frequencies above the voice frequency, e.g. xDSL line qualification
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2209—Arrangements for supervision, monitoring or testing for lines also used for data transmission
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Quality & Reliability (AREA)
- Power Engineering (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephonic Communication Services (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Telephone Function (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Description
Claims (3)
- ループ長およびブリッジタップ長推定システムであって、
計測された周波数ドメイン・チャネル・インパルス応答と理論的周波数ドメイン・チャネル・インパルス応答との比較に基づいて、通信チャネルのループ長および少なくとも一つのブリッジタップ長を決定するよう構成されたループ長およびブリッジタップ決定装置を有するモデムと、
推定されたループ長および何らかのブリッジタップの存在と長さを、それぞれ出力するループ長出力装置およびブリッジタップ出力装置と、
を備えたブリッジタップ長推定システム。 - ループ長およびブリッジタップ長推定方法であって、
モデムにおけるループ長およびブリッジタップ決定器により、計測された周波数ドメイン・チャネル・インパルス応答と理論的周波数ドメイン・チャネル・インパルス応答との比較に基づいて、ループ長および少なくとも一つのブリッジタップ長を決定し、
推定されたループ長および何らかのブリッジタップの存在と長さを出力することを備えた方法。 - ループ長およびブリッジタップ長推定システムであって、
計測された周波数ドメイン・チャネル・インパルス応答と理論的周波数ドメイン・チャネル・インパルス応答との比較に基づいて、モデムにおける通信チャネルのループ長および少なくとも一つのブリッジタップ長を決定する手段と、
推定されたループ長および何らかのブリッジタップの存在と長さを出力する手段と、
を備えたシステム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17486600P | 2000-01-07 | 2000-01-07 | |
US22430800P | 2000-08-10 | 2000-08-10 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001552546A Division JP4311902B2 (ja) | 2000-01-07 | 2001-01-08 | 伝送ラインのループ長・ブリッジタップ長を決定するためのシステムおよび方法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010000204A Division JP2010148120A (ja) | 2000-01-07 | 2010-01-04 | 伝送ラインのループ長・ブリッジタップ長を決定するためのシステムおよび方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009044733A JP2009044733A (ja) | 2009-02-26 |
JP4473327B2 true JP4473327B2 (ja) | 2010-06-02 |
Family
ID=26870618
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001552546A Expired - Fee Related JP4311902B2 (ja) | 2000-01-07 | 2001-01-08 | 伝送ラインのループ長・ブリッジタップ長を決定するためのシステムおよび方法 |
JP2008191009A Expired - Fee Related JP4473327B2 (ja) | 2000-01-07 | 2008-07-24 | 伝送ラインのループ長・ブリッジタップ長を決定するためのシステムおよび方法 |
JP2010000204A Pending JP2010148120A (ja) | 2000-01-07 | 2010-01-04 | 伝送ラインのループ長・ブリッジタップ長を決定するためのシステムおよび方法 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001552546A Expired - Fee Related JP4311902B2 (ja) | 2000-01-07 | 2001-01-08 | 伝送ラインのループ長・ブリッジタップ長を決定するためのシステムおよび方法 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010000204A Pending JP2010148120A (ja) | 2000-01-07 | 2010-01-04 | 伝送ラインのループ長・ブリッジタップ長を決定するためのシステムおよび方法 |
Country Status (10)
Country | Link |
---|---|
US (9) | US6865221B2 (ja) |
EP (1) | EP1245085B1 (ja) |
JP (3) | JP4311902B2 (ja) |
KR (1) | KR100683289B1 (ja) |
AT (1) | ATE332593T1 (ja) |
AU (1) | AU2632601A (ja) |
CA (2) | CA2687472C (ja) |
DE (1) | DE60121290T2 (ja) |
ES (2) | ES2407155T3 (ja) |
WO (1) | WO2001052439A1 (ja) |
Families Citing this family (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2687472C (en) | 2000-01-07 | 2015-09-08 | Aware, Inc. | Systems and methods for loop length and bridged tap length determination of a transmission line |
EP2267914A3 (en) | 2000-01-07 | 2012-09-26 | Aware, Inc. | Systems and methods for loop length and bridged tap length determination of a transmission line |
US6782043B1 (en) * | 2000-01-18 | 2004-08-24 | Lsi Logic Corporation | Method and apparatus for estimating the length of a transmission line |
KR100697002B1 (ko) * | 2001-02-17 | 2007-03-20 | 삼성전자주식회사 | 톤 간격 조절을 포함한 초고속 디지털 가입자회선을 위한초기화 방법 및 이를 지원하는 시스템 |
EP1248383B1 (en) * | 2001-04-02 | 2006-09-20 | Alcatel | Method and apparatus for identification of an access network by means of 1-port measurements |
WO2002087103A1 (en) * | 2001-04-19 | 2002-10-31 | Aware, Inc. | Single-ended measurement method and system using abcd-matrix theory of transmission lines |
KR20040015141A (ko) * | 2001-04-26 | 2004-02-18 | 어웨어, 인크. | 양단 측정으로부터의 루프 특성을 위한 시스템 및 방법 |
CA2358379A1 (en) * | 2001-10-05 | 2003-04-05 | Elysium Broadband Inc. | Method and device for preventing signal loss in unterminated bridge taps |
US6782082B2 (en) | 2002-02-15 | 2004-08-24 | Broadcom Corporation | Method and system for reducing cross-talk and avoiding bridged taps |
US7015948B2 (en) * | 2002-04-05 | 2006-03-21 | Spx Corporation | Method and apparatus for real time testing of DTV antenna transmitting systems in time domain under full power |
DE10226348A1 (de) * | 2002-06-13 | 2004-01-15 | Infineon Technologies Ag | Verfahren und Schaltungsanordnung zur Erkennung von Pupinspulen |
AU2003207976A1 (en) * | 2003-02-04 | 2004-08-30 | Tracespan Communications Ltd. | Non-intrusive modem performance analysis |
WO2004100570A2 (en) * | 2003-05-02 | 2004-11-18 | Centillium Communications, Inc. | Automatic mode selection in annex c |
JP4348138B2 (ja) * | 2003-08-01 | 2009-10-21 | パナソニック株式会社 | Adslモデム装置 |
US7446622B2 (en) * | 2003-09-05 | 2008-11-04 | Infinera Corporation | Transmission line with low dispersive properties and its application in equalization |
US7302379B2 (en) | 2003-12-07 | 2007-11-27 | Adaptive Spectrum And Signal Alignment, Inc. | DSL system estimation and parameter recommendation |
US7809116B2 (en) * | 2003-12-07 | 2010-10-05 | Adaptive Spectrum And Signal Alignment, Inc. | DSL system estimation including known DSL line scanning and bad splice detection capability |
WO2005069856A2 (en) * | 2004-01-14 | 2005-08-04 | Conexant Systems, Inc. | Method and apparatus for single end loop testing for dsl provisioning and maintenance |
US7388906B2 (en) * | 2004-05-03 | 2008-06-17 | Sbc Knowledge Ventures, L.P. | Method for detecting bridged taps on telephony cable |
US7440497B2 (en) * | 2004-11-01 | 2008-10-21 | Lsi Corporation | Serial data link using decision feedback equalization |
US7623630B2 (en) * | 2005-04-08 | 2009-11-24 | Ikanos Communications, Inc. | Double-ended line probing (DELP) for DSL systems |
US7405405B2 (en) * | 2005-05-17 | 2008-07-29 | General Electric Company | Method and system for reconstructing an image in a positron emission tomography (PET) system |
CN1870611A (zh) * | 2005-05-26 | 2006-11-29 | 华为技术有限公司 | 估算信道性能参数的方法及系统 |
EP1905195B1 (en) * | 2005-07-10 | 2020-09-02 | Assia Spe, Llc | Dsl system estimation |
DE102006015055B4 (de) * | 2006-03-31 | 2007-12-27 | Nokia Siemens Networks Gmbh & Co.Kg | Verfahren , Anordnung und Einrichtung zur Übermittlung von Informationen zwischen einer zentralen und zumindest einer dezentralen Einheit in einem Kommunikationsnetz |
US20080292064A1 (en) * | 2007-05-21 | 2008-11-27 | Xidong Wu | Methods and apparatus to characterize a digital subscriber line (dsl) subscriber loop |
US20080310617A1 (en) * | 2007-06-14 | 2008-12-18 | Infineon Technologies Ag | Transmission Links |
CN101159777B (zh) * | 2007-11-09 | 2011-02-09 | 华为技术有限公司 | 线路测量方法以及测量装置 |
TW200934154A (en) * | 2007-12-28 | 2009-08-01 | Panasonic Corp | Communication device and communication system |
CN101572569B (zh) * | 2008-05-04 | 2013-01-23 | 华为技术有限公司 | 一种线路拓扑管理方法、系统及相关装置 |
US20100123618A1 (en) * | 2008-11-19 | 2010-05-20 | Harris Corporation | Closed loop phase control between distant points |
US20100124263A1 (en) * | 2008-11-19 | 2010-05-20 | Harris Corporation | Systems for determining a reference signal at any location along a transmission media |
US8170088B2 (en) * | 2008-11-19 | 2012-05-01 | Harris Corporation | Methods for determining a reference signal at any location along a transmission media |
US8249176B2 (en) * | 2008-11-20 | 2012-08-21 | At&T Intellectual Property I, Lp | Method for determination of bridged taps on a transmission line |
US20110062472A1 (en) * | 2009-09-17 | 2011-03-17 | Koninklijke Philips Electronics N.V. | Wavelength-converted semiconductor light emitting device |
EP2675074B1 (en) | 2012-06-13 | 2014-08-06 | Alcatel Lucent | Method and device for detecting a bridged tap within a telecommunication line |
EP2712160B1 (en) * | 2012-09-24 | 2014-06-18 | Alcatel Lucent | Method and device for testing subscriber premises equipment |
US9185204B2 (en) | 2013-07-29 | 2015-11-10 | Ikanos Communications, Inc. | Method and apparatus for designing an improved transmit signal for use in a single ended line test (SELT) |
US10887450B1 (en) * | 2018-09-06 | 2021-01-05 | Adtran, Inc. | Systems and methods for locating faults in a telecommunication line using line test data |
EP3739764A1 (en) * | 2019-05-17 | 2020-11-18 | Nokia Solutions and Networks Oy | Method and apparatus for determining a bridged tap length |
CN112013506B (zh) * | 2019-05-31 | 2022-02-25 | 青岛海尔空调电子有限公司 | 用于通讯检测的方法及装置、空调 |
TWI773966B (zh) * | 2020-02-20 | 2022-08-11 | 瑞昱半導體股份有限公司 | 運作方法以及接收裝置 |
US11553618B2 (en) | 2020-08-26 | 2023-01-10 | PassiveLogic, Inc. | Methods and systems of building automation state load and user preference via network systems activity |
Family Cites Families (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US653098A (en) * | 1900-04-13 | 1900-07-03 | John Edward Laidlaw | Non-reclosable bottle. |
JPS58121838A (ja) | 1981-12-28 | 1983-07-20 | Fujitsu Ltd | 自動等化器 |
US4630228A (en) | 1982-06-28 | 1986-12-16 | Systron-Donner Corporation | Transmission line analyzer for automatically identifying the severities and locations of multiple mismatches |
US5128619A (en) | 1989-04-03 | 1992-07-07 | Bjork Roger A | System and method of determining cable characteristics |
US5068614A (en) | 1990-11-05 | 1991-11-26 | Tektronix, Inc. | Swept frequency domain relectometry enhancement |
JP2867802B2 (ja) * | 1992-04-14 | 1999-03-10 | 日本電気株式会社 | 加入者線におけるブリッジタップ伝送線路位置特定方式 |
AT406533B (de) | 1995-06-26 | 2000-06-26 | Ericsson Austria Ag | Verfahren zur bidirektionalen datenübertragung über eine zweidrahtleitung |
KR100331437B1 (ko) | 1995-06-30 | 2002-08-08 | 삼성전자 주식회사 | 디.엠.티.시스템에서적응형비트교환방법및장치 |
US6385203B2 (en) * | 1996-03-29 | 2002-05-07 | Cisco Technology, Inc. | Communication server apparatus and method |
US5864602A (en) * | 1997-04-28 | 1999-01-26 | Nynex Science & Technologies, Inc. | Qualifying telephone line for digital transmission service |
US6002671A (en) * | 1997-09-03 | 1999-12-14 | Fluke Corporation | Test instrument for testing asymmetric digital subscriber lines |
US5991311A (en) * | 1997-10-25 | 1999-11-23 | Centillium Technology | Time-multiplexed transmission on digital-subscriber lines synchronized to existing TCM-ISDN for reduced cross-talk |
WO1999026375A2 (en) | 1997-11-14 | 1999-05-27 | Tektronix, Inc. | Method of operating a digital data distribution network |
US5994905A (en) | 1997-12-02 | 1999-11-30 | Wavetek Corporation | Frequency domain reflectometer and method of suppressing harmonics |
US6058162A (en) | 1997-12-05 | 2000-05-02 | Harris Corporation | Testing of digital subscriber loops using multi-tone power ratio (MTPR) waveform |
US6259746B1 (en) * | 1998-01-14 | 2001-07-10 | Motorola Inc. | Method for allocating data and power in a discrete multi-tone communication system |
JP3510473B2 (ja) | 1998-03-23 | 2004-03-29 | 横河電機株式会社 | 伝送特性測定装置 |
US6370187B1 (en) | 1998-04-01 | 2002-04-09 | Texas Instruments Incorporated | Adaptive power dissipation for data communications system |
US6091713A (en) * | 1998-04-13 | 2000-07-18 | Telcordia Technologies, Inc. | Method and system for estimating the ability of a subscriber loop to support broadband services |
US6292539B1 (en) | 1998-05-29 | 2001-09-18 | Verizon Laboratories Inc. | Method and apparatus for digital subscriber loop qualification |
GB9820427D0 (en) * | 1998-09-18 | 1998-11-11 | Northern Telecom Ltd | Wireline communication system and method of frequency allocation therin |
US6965578B1 (en) * | 1998-09-30 | 2005-11-15 | Conexant Systems, Inc. | Echo canceling method and apparatus for digital data communication system |
US6292468B1 (en) | 1998-12-31 | 2001-09-18 | Qwest Communications International Inc. | Method for qualifying a loop for DSL service |
US6215855B1 (en) | 1999-01-21 | 2001-04-10 | Bell Atlantic Network Services, Inc. | Loop certification and measurement for ADSL |
ES2262295T3 (es) | 1999-03-31 | 2006-11-16 | Alcatel | Metodo y disposicion para estimar las caracteristicas de un canal de transmision. |
US6895081B1 (en) | 1999-04-20 | 2005-05-17 | Teradyne, Inc. | Predicting performance of telephone lines for data services |
US6177801B1 (en) * | 1999-04-21 | 2001-01-23 | Sunrise Telecom, Inc. | Detection of bridge tap using frequency domain analysis |
US6512789B1 (en) * | 1999-04-30 | 2003-01-28 | Pctel, Inc. | Partial equalization for digital communication systems |
US6751254B1 (en) * | 1999-05-05 | 2004-06-15 | Panasonic Communications Co., Ltd. | Activation of multiple xDSL modems with power control measurement |
US6256377B1 (en) | 1999-05-25 | 2001-07-03 | Adtran, Inc. | Loop loss measurement and reporting mechanism for digital data services telephone channel equipment |
CA2369858C (en) | 1999-06-25 | 2006-02-21 | Stefano Galli | Single ended measurement method and system for determining subscriber loop make up |
US6538451B1 (en) | 1999-06-25 | 2003-03-25 | Telcordia Technologies, Inc. | Single ended measurement method and system for determining subscriber loop make up |
US6487276B1 (en) | 1999-09-30 | 2002-11-26 | Teradyne, Inc. | Detecting faults in subscriber telephone lines |
US6532277B2 (en) * | 1999-11-12 | 2003-03-11 | Qwest Communications International Inc. | Method for controlling DSL transmission power |
US6512597B1 (en) * | 1999-11-17 | 2003-01-28 | Lexmark International, Inc. | Method and apparatus for correcting unadjusted threshold arrays for halftoning by use of parameterized transfer functions that generate adjusted threshold arrays at run time |
PT1245093E (pt) * | 2000-01-07 | 2007-01-31 | Aware Inc | Sistemas e métodos de diagnóstico para modems de portadoras múltiplas |
EP2267914A3 (en) * | 2000-01-07 | 2012-09-26 | Aware, Inc. | Systems and methods for loop length and bridged tap length determination of a transmission line |
CA2687472C (en) | 2000-01-07 | 2015-09-08 | Aware, Inc. | Systems and methods for loop length and bridged tap length determination of a transmission line |
US6553098B1 (en) | 2000-04-11 | 2003-04-22 | Verizon Laboratories Inc. | Apparatus and method for assessing leakage from cable networks |
US6516049B1 (en) | 2000-06-06 | 2003-02-04 | Ikanos Communications, Inc. | Method and apparatus for insertion loss estimation in wireline communications |
US6996199B2 (en) * | 2001-01-25 | 2006-02-07 | Bandspeed, Inc. | Approach for processing data received from a communications channel to reduce noise power and optimize impulse response length to reduce inter-symbol interference and inter-channel interference |
KR20040015141A (ko) | 2001-04-26 | 2004-02-18 | 어웨어, 인크. | 양단 측정으로부터의 루프 특성을 위한 시스템 및 방법 |
US6707886B2 (en) * | 2001-06-08 | 2004-03-16 | At&T Corp. | Method and system for testing subscriber loops using touchtone telephone signals |
US6842012B2 (en) * | 2001-11-07 | 2005-01-11 | Aware, Inc. | Modeling and calibrating a three-port time-domain reflectometry system |
US6782082B2 (en) * | 2002-02-15 | 2004-08-24 | Broadcom Corporation | Method and system for reducing cross-talk and avoiding bridged taps |
US7313130B2 (en) * | 2002-04-01 | 2007-12-25 | Texas Instruments Incorporated | Spectrally compatible mask for enhanced upstream data rates in DSL systems |
US7486894B2 (en) * | 2002-06-25 | 2009-02-03 | Finisar Corporation | Transceiver module and integrated circuit with dual eye openers |
-
2001
- 2001-01-08 CA CA2687472A patent/CA2687472C/en not_active Expired - Fee Related
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