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JPS55100758A - Fault-point orientation system - Google Patents

Fault-point orientation system

Info

Publication number
JPS55100758A
JPS55100758A JP858379A JP858379A JPS55100758A JP S55100758 A JPS55100758 A JP S55100758A JP 858379 A JP858379 A JP 858379A JP 858379 A JP858379 A JP 858379A JP S55100758 A JPS55100758 A JP S55100758A
Authority
JP
Japan
Prior art keywords
fault
cable
signal
transmitted
search signal
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
JP858379A
Other languages
Japanese (ja)
Other versions
JPS6154293B2 (en
Inventor
Toshikazu Matsumoto
Toshio Takeshi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP858379A priority Critical patent/JPS55100758A/en
Publication of JPS55100758A publication Critical patent/JPS55100758A/en
Publication of JPS6154293B2 publication Critical patent/JPS6154293B2/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

Landscapes

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

Abstract

PURPOSE:To simplify circuit constitution by orientating upward and downward repeater where a fault is occurring by separately transmitting a transmitted signal and fault-search signal and then by sending the transmitted signal at a repeating point by using the fault- search signal. CONSTITUTION:Via transmitted-signal cable 26 and fault-search signal cable 17 of transmission line cable 18, a transmitted signal and fault-search signal are separately transmitted and to each repeating point between cables 18, BPF9 connected to cable 17 and photo switch control circuit 22 controlling photo switches 23 and 24 by the output of BPF9 are connected. Further, cables 26 are provided with repeaters 8 and 10, photo switch circuits 23 and 24, and photo attenuating field 25. Then, when a fault of cable 26 is detected by the search signal of cable 17, circuit 22 is controlled by the output of BPF9 to change switches 23 and 24 over to the attenuator-25 side, and the transmitted signal is sent back at the repeating point to orientate repeates 8 and 10 getting out of order.
JP858379A 1979-01-26 1979-01-26 Fault-point orientation system Granted JPS55100758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP858379A JPS55100758A (en) 1979-01-26 1979-01-26 Fault-point orientation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP858379A JPS55100758A (en) 1979-01-26 1979-01-26 Fault-point orientation system

Publications (2)

Publication Number Publication Date
JPS55100758A true JPS55100758A (en) 1980-07-31
JPS6154293B2 JPS6154293B2 (en) 1986-11-21

Family

ID=11697020

Family Applications (1)

Application Number Title Priority Date Filing Date
JP858379A Granted JPS55100758A (en) 1979-01-26 1979-01-26 Fault-point orientation system

Country Status (1)

Country Link
JP (1) JPS55100758A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0389649A (en) * 1989-08-31 1991-04-15 Nec Corp Turn-back circuit
US5278989A (en) * 1990-01-18 1994-01-11 Andrew Corporation Distributed amplifier network management system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5382114A (en) * 1976-12-27 1978-07-20 Nishinihon Musen Kougiyou Kk System for monitoring communication channel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5382114A (en) * 1976-12-27 1978-07-20 Nishinihon Musen Kougiyou Kk System for monitoring communication channel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0389649A (en) * 1989-08-31 1991-04-15 Nec Corp Turn-back circuit
US5278989A (en) * 1990-01-18 1994-01-11 Andrew Corporation Distributed amplifier network management system

Also Published As

Publication number Publication date
JPS6154293B2 (en) 1986-11-21

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