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JPS5772436A - Monitor system for repeating installation - Google Patents

Monitor system for repeating installation

Info

Publication number
JPS5772436A
JPS5772436A JP14689680A JP14689680A JPS5772436A JP S5772436 A JPS5772436 A JP S5772436A JP 14689680 A JP14689680 A JP 14689680A JP 14689680 A JP14689680 A JP 14689680A JP S5772436 A JPS5772436 A JP S5772436A
Authority
JP
Japan
Prior art keywords
frequency
repeating
repeating installation
installation
fault search
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
JP14689680A
Other languages
Japanese (ja)
Inventor
Masatoshi Fujisawa
Kenichi Shoji
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 JP14689680A priority Critical patent/JPS5772436A/en
Publication of JPS5772436A publication Critical patent/JPS5772436A/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)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To perform a rapid and proper fault processing, by providing a control circuit in each repeating installation to monitor the output of the repeating installation for a fault search current and by changing the oscillation frequency of an oscillator for the fault search current to the second frequency and transmitting it if abnormality is detected. CONSTITUTION:When repeating installations 1-3 are normal, natural frequencies f1, f2, and f3 are inputted to them from oscillators 5-7 for fault search currents repectively, and repeating installations output respective natural frequencies in prescribed levels. If some repeating installation, for example, the repeating installation 2 becomes abnormal, the output level of the natural frequency f2 exceeds a constant range. Therefore, a control circuit 9 detects the abnormality to change the oscillation frequency of the oscillator 6 for the fault search current to the second frequency f0. As the result, receiving currents of natural frequencies f1 and f3 and the second frequency f0 are inputted to a terminal station equipment 4. When detecting the second frequency f0, the terminal station equipment 4 recognizes that some repeating installation is faulty and issues an alarm or the like.
JP14689680A 1980-10-22 1980-10-22 Monitor system for repeating installation Pending JPS5772436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14689680A JPS5772436A (en) 1980-10-22 1980-10-22 Monitor system for repeating installation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14689680A JPS5772436A (en) 1980-10-22 1980-10-22 Monitor system for repeating installation

Publications (1)

Publication Number Publication Date
JPS5772436A true JPS5772436A (en) 1982-05-06

Family

ID=15418019

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14689680A Pending JPS5772436A (en) 1980-10-22 1980-10-22 Monitor system for repeating installation

Country Status (1)

Country Link
JP (1) JPS5772436A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07115390A (en) * 1993-10-15 1995-05-02 Nec Corp Optical submarine repeater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07115390A (en) * 1993-10-15 1995-05-02 Nec Corp Optical submarine repeater

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