JPS5422115A - Monitoring system for transmission circuit - Google Patents

Monitoring system for transmission circuit

Info

Publication number
JPS5422115A
JPS5422115A JP8607177A JP8607177A JPS5422115A JP S5422115 A JPS5422115 A JP S5422115A JP 8607177 A JP8607177 A JP 8607177A JP 8607177 A JP8607177 A JP 8607177A JP S5422115 A JPS5422115 A JP S5422115A
Authority
JP
Japan
Prior art keywords
monitoring system
transmission circuit
bpf
repeater
shorten
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
JP8607177A
Other languages
Japanese (ja)
Inventor
Keiji Tomooka
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8607177A priority Critical patent/JPS5422115A/en
Publication of JPS5422115A publication Critical patent/JPS5422115A/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 shorten the maintenance time through formation of the fault section partitioning monitor loop by providing BPF between the input/output terminal of the repeater and returning transmission line.
JP8607177A 1977-07-20 1977-07-20 Monitoring system for transmission circuit Pending JPS5422115A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8607177A JPS5422115A (en) 1977-07-20 1977-07-20 Monitoring system for transmission circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8607177A JPS5422115A (en) 1977-07-20 1977-07-20 Monitoring system for transmission circuit

Publications (1)

Publication Number Publication Date
JPS5422115A true JPS5422115A (en) 1979-02-19

Family

ID=13876463

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8607177A Pending JPS5422115A (en) 1977-07-20 1977-07-20 Monitoring system for transmission circuit

Country Status (1)

Country Link
JP (1) JPS5422115A (en)

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