JPS5375704A - Light communication unit - Google Patents

Light communication unit

Info

Publication number
JPS5375704A
JPS5375704A JP15085176A JP15085176A JPS5375704A JP S5375704 A JPS5375704 A JP S5375704A JP 15085176 A JP15085176 A JP 15085176A JP 15085176 A JP15085176 A JP 15085176A JP S5375704 A JPS5375704 A JP S5375704A
Authority
JP
Japan
Prior art keywords
communication unit
light communication
abnormity
continuity
practicality
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
JP15085176A
Other languages
Japanese (ja)
Inventor
Kazuhiro Sano
Hiroyuki Kudo
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 JP15085176A priority Critical patent/JPS5375704A/en
Publication of JPS5375704A publication Critical patent/JPS5375704A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/032—Arrangements for fault recovery using working and protection systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To obtain the system high reliability and practicality, by enabling the continuity of transmission as required through the detection of abnormity with light emitting elements.
JP15085176A 1976-12-17 1976-12-17 Light communication unit Pending JPS5375704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15085176A JPS5375704A (en) 1976-12-17 1976-12-17 Light communication unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15085176A JPS5375704A (en) 1976-12-17 1976-12-17 Light communication unit

Publications (1)

Publication Number Publication Date
JPS5375704A true JPS5375704A (en) 1978-07-05

Family

ID=15505754

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15085176A Pending JPS5375704A (en) 1976-12-17 1976-12-17 Light communication unit

Country Status (1)

Country Link
JP (1) JPS5375704A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5542479A (en) * 1978-09-21 1980-03-25 Nippon Telegr & Teleph Corp <Ntt> Submarine photo repeater
JPS5588341A (en) * 1978-12-27 1980-07-04 Hitachi Ltd Assembling device
JPS561645A (en) * 1979-06-19 1981-01-09 Kokusai Denshin Denwa Co Ltd <Kdd> Remote control system for optical repeater
JPS6156549A (en) * 1984-07-28 1986-03-22 Fujitsu Ltd Signal monitor method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5542479A (en) * 1978-09-21 1980-03-25 Nippon Telegr & Teleph Corp <Ntt> Submarine photo repeater
JPS5719618B2 (en) * 1978-09-21 1982-04-23
JPS5588341A (en) * 1978-12-27 1980-07-04 Hitachi Ltd Assembling device
JPS561645A (en) * 1979-06-19 1981-01-09 Kokusai Denshin Denwa Co Ltd <Kdd> Remote control system for optical repeater
JPS6156549A (en) * 1984-07-28 1986-03-22 Fujitsu Ltd Signal monitor method
JPH0582102B2 (en) * 1984-07-28 1993-11-17 Fujitsu Ltd

Similar Documents

Publication Publication Date Title
JPS5375704A (en) Light communication unit
JPS5336116A (en) Loop transmission system
JPS53142158A (en) Switch state detector
JPS5345249A (en) Light transmitting device
JPS5343579A (en) Multiwave length light detector
JPS53128904A (en) Data communication device
JPS53134395A (en) Display selection system
JPS5313393A (en) Display unit
JPS52152273A (en) Action checking method of light dimming type smoke sensor
JPS5324708A (en) Transmitter
JPS51132903A (en) Light transmission apparatus
JPS5339010A (en) Switch extending connector system
JPS5374804A (en) Optical transmission system
JPS5389601A (en) Light communication unit
JPS5364084A (en) System spectometer
JPS5261375A (en) Emergency lighting device
JPS5232533A (en) Frequency demultiplier
JPS52138857A (en) Logical operation circuit
JPS5217054A (en) Level detector
JPS5433015A (en) Tape running direction display device of small size tape recorders
JPS51147904A (en) Light receiving system
JPS52110644A (en) Light beam transmission system
JPS5317360A (en) Power consumption detecting device
JPS52128146A (en) Optical cable connection method
JPS5211809A (en) Data transmission system