JPS57123745A - Fault information transfer system - Google Patents

Fault information transfer system

Info

Publication number
JPS57123745A
JPS57123745A JP892481A JP892481A JPS57123745A JP S57123745 A JPS57123745 A JP S57123745A JP 892481 A JP892481 A JP 892481A JP 892481 A JP892481 A JP 892481A JP S57123745 A JPS57123745 A JP S57123745A
Authority
JP
Japan
Prior art keywords
frequency
fault
fault information
station
pilot
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
JP892481A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6232665B2 (enrdf_load_stackoverflow
Inventor
Yoichiro Enami
Akimasa Yamazaki
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 JP892481A priority Critical patent/JPS57123745A/ja
Publication of JPS57123745A publication Critical patent/JPS57123745A/ja
Publication of JPS6232665B2 publication Critical patent/JPS6232665B2/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
    • H04B17/401—Monitoring; Testing of relay systems with selective localization
    • H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
    • H04B17/405—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local multipliers, dividers, modulators

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)
JP892481A 1981-01-26 1981-01-26 Fault information transfer system Granted JPS57123745A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP892481A JPS57123745A (en) 1981-01-26 1981-01-26 Fault information transfer system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP892481A JPS57123745A (en) 1981-01-26 1981-01-26 Fault information transfer system

Publications (2)

Publication Number Publication Date
JPS57123745A true JPS57123745A (en) 1982-08-02
JPS6232665B2 JPS6232665B2 (enrdf_load_stackoverflow) 1987-07-16

Family

ID=11706196

Family Applications (1)

Application Number Title Priority Date Filing Date
JP892481A Granted JPS57123745A (en) 1981-01-26 1981-01-26 Fault information transfer system

Country Status (1)

Country Link
JP (1) JPS57123745A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS6232665B2 (enrdf_load_stackoverflow) 1987-07-16

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