GB8918862D0 - Line monitoring system - Google Patents

Line monitoring system

Info

Publication number
GB8918862D0
GB8918862D0 GB898918862A GB8918862A GB8918862D0 GB 8918862 D0 GB8918862 D0 GB 8918862D0 GB 898918862 A GB898918862 A GB 898918862A GB 8918862 A GB8918862 A GB 8918862A GB 8918862 D0 GB8918862 D0 GB 8918862D0
Authority
GB
United Kingdom
Prior art keywords
monitoring system
line monitoring
line
monitoring
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.)
Pending
Application number
GB898918862A
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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 British Telecommunications PLC filed Critical British Telecommunications PLC
Priority to GB898918862A priority Critical patent/GB8918862D0/en
Publication of GB8918862D0 publication Critical patent/GB8918862D0/en
Priority to EP19900912495 priority patent/EP0486583A1/en
Priority to CA 2064789 priority patent/CA2064789A1/en
Priority to JP51180590A priority patent/JPH05500107A/en
Priority to PCT/GB1990/001250 priority patent/WO1991002959A1/en
Priority to AU61826/90A priority patent/AU637629B2/en
Priority to NZ23486090A priority patent/NZ234860A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
    • G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
    • G01M11/3118—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR using coded light-pulse sequences
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/39—Testing of optical devices, constituted by fibre optics or optical waveguides in which light is projected from both sides of the fiber or waveguide end-face

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Communication System (AREA)
GB898918862A 1989-08-18 1989-08-18 Line monitoring system Pending GB8918862D0 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB898918862A GB8918862D0 (en) 1989-08-18 1989-08-18 Line monitoring system
EP19900912495 EP0486583A1 (en) 1989-08-18 1990-08-09 Optical communications system
CA 2064789 CA2064789A1 (en) 1989-08-18 1990-08-09 Optical communications system
JP51180590A JPH05500107A (en) 1989-08-18 1990-08-09 optical communication system
PCT/GB1990/001250 WO1991002959A1 (en) 1989-08-18 1990-08-09 Optical communications system
AU61826/90A AU637629B2 (en) 1989-08-18 1990-08-09 Optical communications system
NZ23486090A NZ234860A (en) 1989-08-18 1990-08-10 Monitoring optical communications system; detecting backscatter from test pulse sequence

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB898918862A GB8918862D0 (en) 1989-08-18 1989-08-18 Line monitoring system

Publications (1)

Publication Number Publication Date
GB8918862D0 true GB8918862D0 (en) 1989-09-27

Family

ID=10661821

Family Applications (1)

Application Number Title Priority Date Filing Date
GB898918862A Pending GB8918862D0 (en) 1989-08-18 1989-08-18 Line monitoring system

Country Status (7)

Country Link
EP (1) EP0486583A1 (en)
JP (1) JPH05500107A (en)
AU (1) AU637629B2 (en)
CA (1) CA2064789A1 (en)
GB (1) GB8918862D0 (en)
NZ (1) NZ234860A (en)
WO (1) WO1991002959A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE123568T1 (en) * 1990-02-15 1995-06-15 British Telecomm OPTICAL TEST APPARATUS WITH AN OTDR.
CA2112692C (en) * 1992-05-01 2004-09-21 Akira Inoue Method for identifying optical line
GB9524485D0 (en) * 1995-11-30 1996-01-31 Bicc Plc Device for interrogating an optical fibre network
GB2401738A (en) * 2003-05-16 2004-11-17 Radiodetection Ltd Optical fibre sensor
US9118412B2 (en) 2011-09-27 2015-08-25 Broadcom Corporation System and method for performing in-band reflection analysis in a passive optical network

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3340428A1 (en) * 1983-11-09 1985-05-23 Wandel & Goltermann Gmbh & Co, 7412 Eningen Method and device for monitoring an optical data transmission system
GB8906937D0 (en) * 1989-03-28 1989-05-10 Plessey Telecomm Testing optical fibre links
GB9027716D0 (en) * 1990-12-20 1991-02-13 British Telecomm Optical communications system

Also Published As

Publication number Publication date
AU6182690A (en) 1991-04-03
WO1991002959A1 (en) 1991-03-07
NZ234860A (en) 1992-10-28
AU637629B2 (en) 1993-06-03
CA2064789A1 (en) 1991-02-19
JPH05500107A (en) 1993-01-14
EP0486583A1 (en) 1992-05-27

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