[go: nahoru, domu]

JPS575447A - Failure detecting system - Google Patents

Failure detecting system

Info

Publication number
JPS575447A
JPS575447A JP7893280A JP7893280A JPS575447A JP S575447 A JPS575447 A JP S575447A JP 7893280 A JP7893280 A JP 7893280A JP 7893280 A JP7893280 A JP 7893280A JP S575447 A JPS575447 A JP S575447A
Authority
JP
Japan
Prior art keywords
signal
failure
repeater
receiver
optical fiber
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
JP7893280A
Other languages
Japanese (ja)
Inventor
Fumio Fujioka
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7893280A priority Critical patent/JPS575447A/en
Publication of JPS575447A publication Critical patent/JPS575447A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To detect a failure generating area simply, by using an optical fiber cable for signal, by transmitting an inherent signal during the range of failure, if failures such as intermission of transmitting signals or lowering in signal level takes place. CONSTITUTION:If a failure takes place at a point P of an optical fiber cable 21 for signal, an optical signal from a repeater 30 is not inputted to a repeater 31, and an input signal in a detecting circut of the repeater 31 is turned off, and failure signal from a failure signal generating circuit is outputted and it is inputted to a receiver 4 via optical fiber cables 22-2n for signal and a repeater 3n. The receiver 4 converts an input optical signal into an electric signal, which is applied to the failure detecting circuit to identify where the failure signal comes and the identified signal is outputted to a terminal 19. Further, if a transmitter 1 is in failure, a failure signal is transmitted from the transmitter or a repeater to the receiver 4 to identify where the output comes from and the output is given to the terminal 19.
JP7893280A 1980-06-13 1980-06-13 Failure detecting system Pending JPS575447A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7893280A JPS575447A (en) 1980-06-13 1980-06-13 Failure detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7893280A JPS575447A (en) 1980-06-13 1980-06-13 Failure detecting system

Publications (1)

Publication Number Publication Date
JPS575447A true JPS575447A (en) 1982-01-12

Family

ID=13675637

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7893280A Pending JPS575447A (en) 1980-06-13 1980-06-13 Failure detecting system

Country Status (1)

Country Link
JP (1) JPS575447A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140522A (en) * 1983-01-31 1984-08-11 Shinken:Kk Digital oscillation controller
JPS62246786A (en) * 1986-04-21 1987-10-27 Canon Inc Optical recording medium
JPH0210241A (en) * 1988-06-29 1990-01-16 Sumitomo Electric Ind Ltd Method for testing optical fiber line
US5475385A (en) * 1990-06-16 1995-12-12 Northern Telecom Limited Analogue telemetry system and method for fault detection in optical transmission systems
US5483233A (en) * 1990-06-16 1996-01-09 Northern Telecom Limited Analogue telemetry system and method for fault detection in optical transmission systems

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140522A (en) * 1983-01-31 1984-08-11 Shinken:Kk Digital oscillation controller
JPS62246786A (en) * 1986-04-21 1987-10-27 Canon Inc Optical recording medium
JPH0210241A (en) * 1988-06-29 1990-01-16 Sumitomo Electric Ind Ltd Method for testing optical fiber line
US5475385A (en) * 1990-06-16 1995-12-12 Northern Telecom Limited Analogue telemetry system and method for fault detection in optical transmission systems
US5483233A (en) * 1990-06-16 1996-01-09 Northern Telecom Limited Analogue telemetry system and method for fault detection in optical transmission systems

Similar Documents

Publication Publication Date Title
US4207561A (en) Intruder alarm arrangement for an optical communication system
CA2032384A1 (en) Remote instrument testing system
WO1993025020A3 (en) Optical communication system
AU560303B2 (en) Remote transmission system
NZ293355A (en) System, method and device for monitoring a fiber optic cable
NZ241663A (en) Optical-to-electric conversion: gain controlled optical amplifier
AU2708284A (en) Detecting proximity to electrical power lines
EP0165803A3 (en) A system and an apparatus for locating a grounding fault on electric power equipment
JPS575447A (en) Failure detecting system
EP0115768A3 (en) Optical communication system
JPS56149148A (en) Signal transmission system
JPS57111607A (en) Numerical control device
EP0317778A3 (en) Apparatus for non-invasive calibration of a fluid sensor
JPS5767907A (en) Photoelectric conversion connector
ES2019754A6 (en) Signal power control system for fiber optic communication systems.
JPS5725737A (en) Optical fiber communication device
JPS57103445A (en) Optical communication device
JPS6464423A (en) System for transmitting optical signal
JPS56123145A (en) Photocoupling digital input system
JPS5628530A (en) Terminal equipment in two-way data communication system having transmission signal level automatic control mechanism
JPS5720050A (en) Reception switching system of digital radio system
JPS5617537A (en) Information transmitting system using optical data bus line
JPS5662436A (en) Optical multiplex transmission system
JPS5723352A (en) Signal transmission system
JPS5622404A (en) Optical switch monitor system