JPS55140341A - Supervisory control system - Google Patents

Supervisory control system

Info

Publication number
JPS55140341A
JPS55140341A JP4824779A JP4824779A JPS55140341A JP S55140341 A JPS55140341 A JP S55140341A JP 4824779 A JP4824779 A JP 4824779A JP 4824779 A JP4824779 A JP 4824779A JP S55140341 A JPS55140341 A JP S55140341A
Authority
JP
Japan
Prior art keywords
faulty
output
decided
light
fault exists
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
JP4824779A
Other languages
Japanese (ja)
Inventor
Hiroshi Nakamura
Naomasa Hanano
Tsutomu Fukugahara
Kazuo Iguchi
Masaaki Takahashi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP4824779A priority Critical patent/JPS55140341A/en
Publication of JPS55140341A publication Critical patent/JPS55140341A/en
Pending 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
    • H04B10/29—Repeaters

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To make it possible to discriminate the faulty position of each repeater, by providing a wavelength division multiple switch, which separates a wavelength multiple light signal to light signals of respective wavelength to perform switching of light transmission lines, in each repeater to perform channel switching of light signals. CONSTITUTION:A repeater is constituted by electro-optic conversion circuits E/011-1 and E/011-2, light synthesizer 12, optical fiber 13, wavelength division multiple switch 14, and photoelectric conversion circuits O/E15-1 and O/E15-2. When a fault occurs in this system, it is decided whether the fault exists in outputs (a) and (b) or not; and if the fault exists in outputs (a) and (b), it is decided that the fault exists in fiber 13 including light synthesizer 12. In case of faulty output (a), switch 14 is switched. Therefore, when output (a) becomes normal, it is decided that E/O11-1 is faulty; and when output (a) is not normal still, it is decided that O/E15-1 is faulty. When no fault exists in output (a), switch 14 is switched to decide that E/O11-2 or 0/E15-2 is faulty dependently upon normalcy or anomaly of output (b).
JP4824779A 1979-04-19 1979-04-19 Supervisory control system Pending JPS55140341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4824779A JPS55140341A (en) 1979-04-19 1979-04-19 Supervisory control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4824779A JPS55140341A (en) 1979-04-19 1979-04-19 Supervisory control system

Publications (1)

Publication Number Publication Date
JPS55140341A true JPS55140341A (en) 1980-11-01

Family

ID=12798101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4824779A Pending JPS55140341A (en) 1979-04-19 1979-04-19 Supervisory control system

Country Status (1)

Country Link
JP (1) JPS55140341A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983004150A1 (en) * 1982-05-06 1983-11-24 Nippon Telegraph And Telephone Public Corporation Method and device for separating position of fault in light transmission line
JPS6356028A (en) * 1986-08-26 1988-03-10 Nec Corp Fault detector in optical loop network

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983004150A1 (en) * 1982-05-06 1983-11-24 Nippon Telegraph And Telephone Public Corporation Method and device for separating position of fault in light transmission line
JPS6356028A (en) * 1986-08-26 1988-03-10 Nec Corp Fault detector in optical loop network

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