JPS5539429A - Monitoring system for signal transmission line - Google Patents

Monitoring system for signal transmission line

Info

Publication number
JPS5539429A
JPS5539429A JP11249578A JP11249578A JPS5539429A JP S5539429 A JPS5539429 A JP S5539429A JP 11249578 A JP11249578 A JP 11249578A JP 11249578 A JP11249578 A JP 11249578A JP S5539429 A JPS5539429 A JP S5539429A
Authority
JP
Japan
Prior art keywords
lines
plus
filters
signals
transmission line
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
JP11249578A
Other languages
Japanese (ja)
Inventor
Shigeki Tanaka
Masami Mizuguchi
Toshio Kobayashi
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 JP11249578A priority Critical patent/JPS5539429A/en
Publication of JPS5539429A publication Critical patent/JPS5539429A/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
    • H04B17/401—Monitoring; Testing of relay systems with selective localization
    • H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
    • H04B17/404—Monitoring; Testing of relay systems with selective localization using different frequencies selected by local filters

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)

Abstract

PURPOSE:To ensure an easy detection of the faulty area on the transmission line in the supervisory system for the two-way repeating transmission line by connecting the transmission lines of the two systems via the pseudo line and at the proper position. CONSTITUTION:In case the fault is detected for the going lines L1-Ln, the signals featuring the same frequencies as filters F1 plus F3-Fn+1 which feature the natural resonance frequencies and are provided at repeater stations R1-Rn are transmitted to lines L1-Ln in sequence from end office A. And the faulty area is decided by the presenc or absence of the signals which come back to the supervisory line via filters F1 plus F3-Fn+1. In case the faulty area is detected for going lines L'1-L'n, the signals featuring the same frequencies as filters F2 plus F4-Fn which feature the natural resonance frequencies and are provided at repeater stations R'1-R'n are transmitted in sequence to lines L1-Ln from end office A. And the faulty area is decided by the presence or absence of the signals which come back to the supervisory line via pseudo lines N1-Nn+1 and filters F2 plus F4-Fn.
JP11249578A 1978-09-13 1978-09-13 Monitoring system for signal transmission line Pending JPS5539429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11249578A JPS5539429A (en) 1978-09-13 1978-09-13 Monitoring system for signal transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11249578A JPS5539429A (en) 1978-09-13 1978-09-13 Monitoring system for signal transmission line

Publications (1)

Publication Number Publication Date
JPS5539429A true JPS5539429A (en) 1980-03-19

Family

ID=14588069

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11249578A Pending JPS5539429A (en) 1978-09-13 1978-09-13 Monitoring system for signal transmission line

Country Status (1)

Country Link
JP (1) JPS5539429A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54136537A (en) * 1978-04-06 1979-10-23 Metallurgie Hoboken Method and apparatus for continuous metal casting
JPS58177045A (en) * 1982-04-09 1983-10-17 Kansai Tv Hoso Kk Failure detecting method in signal transmission path

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54136537A (en) * 1978-04-06 1979-10-23 Metallurgie Hoboken Method and apparatus for continuous metal casting
JPS6252663B2 (en) * 1978-04-06 1987-11-06 Metallurgie Hoboken
JPS58177045A (en) * 1982-04-09 1983-10-17 Kansai Tv Hoso Kk Failure detecting method in signal transmission path

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