CA2297871A1 - Dmt test method for determining adsl capability of cables - Google Patents

Dmt test method for determining adsl capability of cables Download PDF

Info

Publication number
CA2297871A1
CA2297871A1 CA002297871A CA2297871A CA2297871A1 CA 2297871 A1 CA2297871 A1 CA 2297871A1 CA 002297871 A CA002297871 A CA 002297871A CA 2297871 A CA2297871 A CA 2297871A CA 2297871 A1 CA2297871 A1 CA 2297871A1
Authority
CA
Canada
Prior art keywords
adsl
dmt
test
theoretical
test method
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.)
Granted
Application number
CA002297871A
Other languages
French (fr)
Other versions
CA2297871C (en
Inventor
Ronald Y. R. Liang
Robert Layton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Exfo Inc
Original Assignee
Consultronics Ltd
Sony Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Consultronics Ltd, Sony Corp filed Critical Consultronics Ltd
Priority to CA 2297871 priority Critical patent/CA2297871C/en
Publication of CA2297871A1 publication Critical patent/CA2297871A1/en
Application granted granted Critical
Publication of CA2297871C publication Critical patent/CA2297871C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H04L1/24—Testing correct operation
    • 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
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

A DMT (Discrete Multi-Tone) test method is provided. The test method is employed by two test devices to estimate the theoretical and practical data rates of a cable under test for a pair of target ADSL (Asymmetric Digital Subscriber Line) DMT modems. The present DMT test can also be used to analyze the cause of, or to predict a problem, whereby a pair of ADSL
DMT modems could fail to synchronize. The method includes (a) synchronizing two devices at lower frequencies; (b) measuring the frequency characteristics of the cable with test signals;
(c) measuring the cable noise and interference for every sub-channel of the ADSL bandwidth;
(d) determining the theoretical and practical data rates for every sub-channel, based on the measured frequency characteristics and noise characteristics, as well as modem parameters selected by the user; (e) estimating the theoretical and practical data rates for the ADSL
bandwidth based on the ADSL DMT standard selected by the user.
CA 2297871 2000-02-03 2000-02-03 Dmt test method for determining adsl capability of cables Expired - Fee Related CA2297871C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2297871 CA2297871C (en) 2000-02-03 2000-02-03 Dmt test method for determining adsl capability of cables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2297871 CA2297871C (en) 2000-02-03 2000-02-03 Dmt test method for determining adsl capability of cables

Publications (2)

Publication Number Publication Date
CA2297871A1 true CA2297871A1 (en) 2001-08-03
CA2297871C CA2297871C (en) 2004-12-28

Family

ID=4165240

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2297871 Expired - Fee Related CA2297871C (en) 2000-02-03 2000-02-03 Dmt test method for determining adsl capability of cables

Country Status (1)

Country Link
CA (1) CA2297871C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1349355A1 (en) * 2002-03-28 2003-10-01 BRITISH TELECOMMUNICATIONS public limited company Fault detection method and apparatus for telephone lines
EP1370879A2 (en) * 2001-02-15 2003-12-17 2Wire, Inc. System and method for fault isolation for dsl loop extenders
WO2005032112A1 (en) 2003-09-26 2005-04-07 Teradyne, Inc. Method and apparatus for identifying faults in a broadband network
WO2010093300A1 (en) * 2009-02-11 2010-08-19 Telefonaktiebolaget L M Ericsson (Publ) Methods and devices for transmission line analysis

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1370879A2 (en) * 2001-02-15 2003-12-17 2Wire, Inc. System and method for fault isolation for dsl loop extenders
EP1370879A4 (en) * 2001-02-15 2006-04-26 2Wire Inc System and method for fault isolation for dsl loop extenders
EP1349355A1 (en) * 2002-03-28 2003-10-01 BRITISH TELECOMMUNICATIONS public limited company Fault detection method and apparatus for telephone lines
WO2003084198A1 (en) 2002-03-28 2003-10-09 British Telecommunications Public Limited Company Fault detection method and apparatus for telephone lines
US7440552B2 (en) 2002-03-28 2008-10-21 British Telecommunications Public Limited Company Fault detection method and apparatus for telephone lines
WO2005032112A1 (en) 2003-09-26 2005-04-07 Teradyne, Inc. Method and apparatus for identifying faults in a broadband network
WO2010093300A1 (en) * 2009-02-11 2010-08-19 Telefonaktiebolaget L M Ericsson (Publ) Methods and devices for transmission line analysis
US8767809B2 (en) 2009-02-11 2014-07-01 Telefonaktiebolaget L M Ericsson (Publ) Methods and devices for transmission line analysis
US9246614B2 (en) 2009-02-11 2016-01-26 Telefonaktiebolaget L M Ericsson (Publ) Methods and devices for transmission line analysis

Also Published As

Publication number Publication date
CA2297871C (en) 2004-12-28

Similar Documents

Publication Publication Date Title
US7653843B2 (en) Method and arrangement to estimate transmission channel characteristics
CA2363370A1 (en) Single ended dmt test method for determining dsl capability of cables
KR101021420B1 (en) Systems And Methods For Characterizing Transmission Lines Using Broadband Signals In A Multi-Carrier DSL Environment
JP3945590B2 (en) Communication channel test method and communication system
US6445773B1 (en) DMT test method for determining ADSL capability of cables
JP3622510B2 (en) Digital subscriber line transmission method, ADSL transceiver, channel analysis system method, and ADSL apparatus
US6724849B1 (en) Method and apparatus for timing recovery in ADSL transceivers under a TCM-ISDN crosstalk environment
US8295192B2 (en) Arrangement and method relating to digital subscribe lines
CN101908909B (en) Far end crosstalk channel estimation method and device
US20080187077A1 (en) Method for estimating crosstalk interferences in a communication network
CN101459498B (en) Detection method, apparatus and system for dispenser
US6721394B1 (en) Method for reducing noise from an asymmetric digital subscriber line modem
CA2297871A1 (en) Dmt test method for determining adsl capability of cables
EP2383899B1 (en) A method for determining a noise level on a data transmission line, and associated devices
US20040136405A1 (en) Obtaining and maintaining TTR synchronization during DSL transceiver channel discovery phase in presence of TCM-ISDN noise
EP2451121A1 (en) Method and system for preestimating maximum bandwidth of subscriber line in digital subscriber loop
JP3567458B2 (en) xDSL transmission rate measuring device
Mammi et al. A method for copper lines classification

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20150203