JPS57180255A - Line repeater - Google Patents

Line repeater

Info

Publication number
JPS57180255A
JPS57180255A JP6335981A JP6335981A JPS57180255A JP S57180255 A JPS57180255 A JP S57180255A JP 6335981 A JP6335981 A JP 6335981A JP 6335981 A JP6335981 A JP 6335981A JP S57180255 A JPS57180255 A JP S57180255A
Authority
JP
Japan
Prior art keywords
line
repeater
circuit
series
transformer
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
JP6335981A
Other languages
Japanese (ja)
Inventor
Tatsuo Umetsu
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 JP6335981A priority Critical patent/JPS57180255A/en
Publication of JPS57180255A publication Critical patent/JPS57180255A/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)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To enable to locate a failed repeater easily with a simple constitution, by driving a failure point locating circuit with a signal of specific frequency transmitted superimposingly on a line, in a line repeater of series feeding system. CONSTITUTION:A selecting frequency signal flows to the primary winding of a transformer 13 connected in series with a power supply circuit 12 in a line repeater of series feeding system having a power separation circuit for input and output sections and connected with the power supply circuit 12 between both power separation circuits. A location circuit is driven with the output of a band pass filter 14 connected to the secondary side of the transformer 13 for folding connection. Thus, folding connection from an arbitrary repeater can be made with the selection signal transmitted from a terminal to the line.
JP6335981A 1981-04-28 1981-04-28 Line repeater Pending JPS57180255A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6335981A JPS57180255A (en) 1981-04-28 1981-04-28 Line repeater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6335981A JPS57180255A (en) 1981-04-28 1981-04-28 Line repeater

Publications (1)

Publication Number Publication Date
JPS57180255A true JPS57180255A (en) 1982-11-06

Family

ID=13226976

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6335981A Pending JPS57180255A (en) 1981-04-28 1981-04-28 Line repeater

Country Status (1)

Country Link
JP (1) JPS57180255A (en)

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