JPS5593337A - Loop type data highway system using optical fiber - Google Patents

Loop type data highway system using optical fiber

Info

Publication number
JPS5593337A
JPS5593337A JP30879A JP30879A JPS5593337A JP S5593337 A JPS5593337 A JP S5593337A JP 30879 A JP30879 A JP 30879A JP 30879 A JP30879 A JP 30879A JP S5593337 A JPS5593337 A JP S5593337A
Authority
JP
Japan
Prior art keywords
remote station
station
optical fiber
data highway
type data
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
JP30879A
Other languages
Japanese (ja)
Inventor
Makoto Tachikawa
Hisanori Shiraishi
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 JP30879A priority Critical patent/JPS5593337A/en
Publication of JPS5593337A publication Critical patent/JPS5593337A/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
    • H04B10/29—Repeaters

Abstract

PURPOSE:To enable to make long the distance between stations even if a certain attenuation is present at the optical switch section, by tentatively increasing the transmission power of the prestage station for the by-passed station at by-pass. CONSTITUTION:On the closed loop formed with the optical fiber data highway 1, the data transmission and reception sections on which the fiber selectors 10, 20, 30 and the repeaters 11, 21, 31 are respectively provided are in cascade connection. If the remote station 22 and the repeater 23 are in failure, the optical switch is selected to by-pass side and the selection instruction 201 is given to the remote station 12. After that, the selection instruction increases the optical output of the remote station to maximum output to enable the transmission to the remote station 32.
JP30879A 1979-01-08 1979-01-08 Loop type data highway system using optical fiber Pending JPS5593337A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30879A JPS5593337A (en) 1979-01-08 1979-01-08 Loop type data highway system using optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30879A JPS5593337A (en) 1979-01-08 1979-01-08 Loop type data highway system using optical fiber

Publications (1)

Publication Number Publication Date
JPS5593337A true JPS5593337A (en) 1980-07-15

Family

ID=11470270

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30879A Pending JPS5593337A (en) 1979-01-08 1979-01-08 Loop type data highway system using optical fiber

Country Status (1)

Country Link
JP (1) JPS5593337A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6087535A (en) * 1983-10-19 1985-05-17 Ohkura Electric Co Ltd Optical transmission unit
US4531240A (en) * 1982-09-29 1985-07-23 Canon Kabushiki Kaisha Data communication system
US4541044A (en) * 1981-04-23 1985-09-10 Canon Kabushiki Kaisha Loop transmission with back-up power supply for the interface
JPS62102635A (en) * 1985-10-29 1987-05-13 Nec Corp Optical communication system
US4688266A (en) * 1983-03-02 1987-08-18 Mitsubishi Denki Kabushiki Kaisha Car data transmission device for optical fibers
JPH0391331A (en) * 1989-09-04 1991-04-16 Rohm Co Ltd Infrared ray remote controller

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4541044A (en) * 1981-04-23 1985-09-10 Canon Kabushiki Kaisha Loop transmission with back-up power supply for the interface
US4531240A (en) * 1982-09-29 1985-07-23 Canon Kabushiki Kaisha Data communication system
US4688266A (en) * 1983-03-02 1987-08-18 Mitsubishi Denki Kabushiki Kaisha Car data transmission device for optical fibers
JPS6087535A (en) * 1983-10-19 1985-05-17 Ohkura Electric Co Ltd Optical transmission unit
JPS62102635A (en) * 1985-10-29 1987-05-13 Nec Corp Optical communication system
JPH0391331A (en) * 1989-09-04 1991-04-16 Rohm Co Ltd Infrared ray remote controller

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