JPS6138661B2 - - Google Patents

Info

Publication number
JPS6138661B2
JPS6138661B2 JP13820978A JP13820978A JPS6138661B2 JP S6138661 B2 JPS6138661 B2 JP S6138661B2 JP 13820978 A JP13820978 A JP 13820978A JP 13820978 A JP13820978 A JP 13820978A JP S6138661 B2 JPS6138661 B2 JP S6138661B2
Authority
JP
Japan
Prior art keywords
signal
optical
repeater
output
bandpass filter
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
JP13820978A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5564454A (en
Inventor
Yukihiro Mochida
Tadao Ogawa
Masanori Arai
Kazuo Yamaguchi
Nobuo Yamaguchi
Kyoshi Takagi
Hiroo Kitasagami
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 JP13820978A priority Critical patent/JPS5564454A/ja
Publication of JPS5564454A publication Critical patent/JPS5564454A/ja
Publication of JPS6138661B2 publication Critical patent/JPS6138661B2/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
    • H04B17/404—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)
  • Optical Communication System (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
JP13820978A 1978-11-09 1978-11-09 Fault search system of photo transmission system Granted JPS5564454A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13820978A JPS5564454A (en) 1978-11-09 1978-11-09 Fault search system of photo transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13820978A JPS5564454A (en) 1978-11-09 1978-11-09 Fault search system of photo transmission system

Publications (2)

Publication Number Publication Date
JPS5564454A JPS5564454A (en) 1980-05-15
JPS6138661B2 true JPS6138661B2 (ref) 1986-08-30

Family

ID=15216625

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13820978A Granted JPS5564454A (en) 1978-11-09 1978-11-09 Fault search system of photo transmission system

Country Status (1)

Country Link
JP (1) JPS5564454A (ref)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6259430A (ja) * 1985-09-09 1987-03-16 Nec Corp 回線監視方式

Also Published As

Publication number Publication date
JPS5564454A (en) 1980-05-15

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