JPS56141636A - Supervisory system of optical fiber cable transmission line - Google Patents

Supervisory system of optical fiber cable transmission line

Info

Publication number
JPS56141636A
JPS56141636A JP4426280A JP4426280A JPS56141636A JP S56141636 A JPS56141636 A JP S56141636A JP 4426280 A JP4426280 A JP 4426280A JP 4426280 A JP4426280 A JP 4426280A JP S56141636 A JPS56141636 A JP S56141636A
Authority
JP
Japan
Prior art keywords
supervisory signal
signal
supervisory
optical fiber
fiber cable
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
JP4426280A
Other languages
Japanese (ja)
Other versions
JPS6255094B2 (en
Inventor
Yoshio Nomura
Nobuyuki Tokura
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 JP4426280A priority Critical patent/JPS56141636A/en
Publication of JPS56141636A publication Critical patent/JPS56141636A/en
Publication of JPS6255094B2 publication Critical patent/JPS6255094B2/ja
Granted 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
    • H04B17/401—Monitoring; Testing of relay systems with selective localization
    • H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
    • H04B17/403—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local oscillators

Landscapes

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

Abstract

PURPOSE:To enable to designate a faulty point of a cable in a short section, by transmitting a supervisory signal to the metallic supporting body of an optical fiber cable, and receiving said supervisory signal by a supervisory signal receiver of the terminal station. CONSTITUTION:Transmission by means of a light signal is executed between the terminal station 11 and 12, and also a supervisory oscillation signal of frequencies which have been assigned from each connection box 8 and the repeater 9, respectively attains to the terminal stations 11, 12 through the supporting body 5. It is selectively received by the supervisory signal receivers 19, 20. When the system is under normal condition, the supervisory signal of each frequency is received by the receivers 19, 20 at a prescribed level. When a cut fault has occurred in the optical fiber cable, the cable having a cut point contacts with sea water and is grounded. As a result, although a light signal is cut off, the receivers 19, 20 are able to receive the supervisory signal. In this case, only a supervisory signal which is transmitted from a connection box 8 before the cut point, or the repeater 9 is received, it is discriminated by the assigned frequency, and it is possible to detect and indicate the section in which the cut point is located.
JP4426280A 1980-04-04 1980-04-04 Supervisory system of optical fiber cable transmission line Granted JPS56141636A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4426280A JPS56141636A (en) 1980-04-04 1980-04-04 Supervisory system of optical fiber cable transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4426280A JPS56141636A (en) 1980-04-04 1980-04-04 Supervisory system of optical fiber cable transmission line

Publications (2)

Publication Number Publication Date
JPS56141636A true JPS56141636A (en) 1981-11-05
JPS6255094B2 JPS6255094B2 (en) 1987-11-18

Family

ID=12686593

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4426280A Granted JPS56141636A (en) 1980-04-04 1980-04-04 Supervisory system of optical fiber cable transmission line

Country Status (1)

Country Link
JP (1) JPS56141636A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59111433A (en) * 1982-12-17 1984-06-27 Hitachi Ltd Signal transmission system
JPS6158344A (en) * 1984-08-30 1986-03-25 Matsushita Electric Ind Co Ltd Monitoring system for optical transmission line apparatus
ES2184611A1 (en) * 2001-05-22 2003-04-01 Miranzo Jose Plaza Fault detection system in leisure machines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59111433A (en) * 1982-12-17 1984-06-27 Hitachi Ltd Signal transmission system
JPH0418492B2 (en) * 1982-12-17 1992-03-27 Hitachi Ltd
JPS6158344A (en) * 1984-08-30 1986-03-25 Matsushita Electric Ind Co Ltd Monitoring system for optical transmission line apparatus
ES2184611A1 (en) * 2001-05-22 2003-04-01 Miranzo Jose Plaza Fault detection system in leisure machines

Also Published As

Publication number Publication date
JPS6255094B2 (en) 1987-11-18

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