JPS6255094B2 - - Google Patents

Info

Publication number
JPS6255094B2
JPS6255094B2 JP4426280A JP4426280A JPS6255094B2 JP S6255094 B2 JPS6255094 B2 JP S6255094B2 JP 4426280 A JP4426280 A JP 4426280A JP 4426280 A JP4426280 A JP 4426280A JP S6255094 B2 JPS6255094 B2 JP S6255094B2
Authority
JP
Japan
Prior art keywords
optical fiber
fiber cable
monitoring
signal
oscillator
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.)
Expired
Application number
JP4426280A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56141636A (en
Inventor
Yoshio Nomura
Nobuyuki Tokura
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP4426280A priority Critical patent/JPS56141636A/ja
Publication of JPS56141636A publication Critical patent/JPS56141636A/ja
Publication of JPS6255094B2 publication Critical patent/JPS6255094B2/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
    • H04B17/403—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local oscillators

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Locating Faults (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
JP4426280A 1980-04-04 1980-04-04 Supervisory system of optical fiber cable transmission line Granted JPS56141636A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4426280A JPS56141636A (en) 1980-04-04 1980-04-04 Supervisory system of optical fiber cable transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4426280A JPS56141636A (en) 1980-04-04 1980-04-04 Supervisory system of optical fiber cable transmission line

Publications (2)

Publication Number Publication Date
JPS56141636A JPS56141636A (en) 1981-11-05
JPS6255094B2 true JPS6255094B2 (cg-RX-API-DMAC7.html) 1987-11-18

Family

ID=12686593

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4426280A Granted JPS56141636A (en) 1980-04-04 1980-04-04 Supervisory system of optical fiber cable transmission line

Country Status (1)

Country Link
JP (1) JPS56141636A (cg-RX-API-DMAC7.html)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59111433A (ja) * 1982-12-17 1984-06-27 Hitachi Ltd 信号伝送システム
JPS6158344A (ja) * 1984-08-30 1986-03-25 Matsushita Electric Ind Co Ltd 光伝送路機器の監視方式
ES2184611B1 (es) * 2001-05-22 2004-08-16 Jose Plaza Miranzo Sistema de deteccion de fraude en maquinas recreativas.

Also Published As

Publication number Publication date
JPS56141636A (en) 1981-11-05

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