JPS5488709A - Light exchanging system - Google Patents

Light exchanging system

Info

Publication number
JPS5488709A
JPS5488709A JP15713677A JP15713677A JPS5488709A JP S5488709 A JPS5488709 A JP S5488709A JP 15713677 A JP15713677 A JP 15713677A JP 15713677 A JP15713677 A JP 15713677A JP S5488709 A JPS5488709 A JP S5488709A
Authority
JP
Japan
Prior art keywords
light
control signal
optical fiber
photo
communication
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
JP15713677A
Other languages
Japanese (ja)
Other versions
JPS603267B2 (en
Inventor
Haruo Ogiwara
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP52157136A priority Critical patent/JPS603267B2/en
Publication of JPS5488709A publication Critical patent/JPS5488709A/en
Publication of JPS603267B2 publication Critical patent/JPS603267B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07955—Monitoring or measuring power

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To perform controlling and monitor for light exchanger, by picking up the control signal with excellent S/N, through the branch and photo electric conversion for a part of light from communication optical fiber and passing via the narrow band filter. CONSTITUTION:Communication signal and the control signal having the band width sufficiently narrower that of the communication signal are transmitted in one optical fiber 1, and a part of the optical fiber 1 is provided with one or more control signal pick up circuits. The pick up circuit consists of the branch circuit 2 branching only a part of light of the fiber 1, photo detector 3 photo-electric-converting the output, and it picks up the control signal with good S/N, enabling to control and monitor the light exchanger.
JP52157136A 1977-12-26 1977-12-26 Optical exchange method Expired JPS603267B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52157136A JPS603267B2 (en) 1977-12-26 1977-12-26 Optical exchange method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52157136A JPS603267B2 (en) 1977-12-26 1977-12-26 Optical exchange method

Publications (2)

Publication Number Publication Date
JPS5488709A true JPS5488709A (en) 1979-07-14
JPS603267B2 JPS603267B2 (en) 1985-01-26

Family

ID=15642980

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52157136A Expired JPS603267B2 (en) 1977-12-26 1977-12-26 Optical exchange method

Country Status (1)

Country Link
JP (1) JPS603267B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5868703A (en) * 1981-10-21 1983-04-23 Fujitsu Ltd Optical switch
JPH01126095A (en) * 1987-11-11 1989-05-18 Oki Electric Ind Co Ltd Light wavelength multiplex self-routing switch
US5581386A (en) * 1991-07-29 1996-12-03 Nec Corporation Method of terminal control signal transmission and photonic switching system incorporating said method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5868703A (en) * 1981-10-21 1983-04-23 Fujitsu Ltd Optical switch
JPH01126095A (en) * 1987-11-11 1989-05-18 Oki Electric Ind Co Ltd Light wavelength multiplex self-routing switch
JPH0787624B2 (en) * 1987-11-11 1995-09-20 沖電気工業株式会社 Optical wavelength multiplexing self-routing switch
US5581386A (en) * 1991-07-29 1996-12-03 Nec Corporation Method of terminal control signal transmission and photonic switching system incorporating said method

Also Published As

Publication number Publication date
JPS603267B2 (en) 1985-01-26

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