JPS5797741A - Optical transmission device with light distributing function - Google Patents

Optical transmission device with light distributing function

Info

Publication number
JPS5797741A
JPS5797741A JP55174389A JP17438980A JPS5797741A JP S5797741 A JPS5797741 A JP S5797741A JP 55174389 A JP55174389 A JP 55174389A JP 17438980 A JP17438980 A JP 17438980A JP S5797741 A JPS5797741 A JP S5797741A
Authority
JP
Japan
Prior art keywords
optical
optical transmission
photocouplers
converting circuits
dual
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
JP55174389A
Other languages
Japanese (ja)
Other versions
JPS6324575B2 (en
Inventor
Kazuo Iguchi
Naomasa Hanano
Tsutomu Fukugahara
Masaaki Takahashi
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 JP55174389A priority Critical patent/JPS5797741A/en
Publication of JPS5797741A publication Critical patent/JPS5797741A/en
Publication of JPS6324575B2 publication Critical patent/JPS6324575B2/ja
Granted 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

Abstract

PURPOSE:To make communication possible even if faults occur in both systems of dual transmission lines, by inserting photocouplers, which synthesize two optical inputs and branch them into two, in one position, at least, of optical transmission lines of dual photoelectric converting circuits. CONSTITUTION:Dual optical transmission lines consist of optical fiber cables 2-1-2-3 and 2'-1-2'-3, electrooptic converting circuits 4, 4', 6, and 6', and photoelectric converting circuits 3, 3', 5, and 5'. Photocouplers 10 and 11 are inserted just after electrooptic converting circuits 4, 4', 6, and 6'. Photocouplers 10 and 11 synthesize two optical inputs and branch them into two and tramsmit them to the next optical fiber cables. Consequently, even if faults occur in the electrooptic converting circuit 4 and the optical cable 2'-1, a communication line is secured.
JP55174389A 1980-12-10 1980-12-10 Optical transmission device with light distributing function Granted JPS5797741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55174389A JPS5797741A (en) 1980-12-10 1980-12-10 Optical transmission device with light distributing function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55174389A JPS5797741A (en) 1980-12-10 1980-12-10 Optical transmission device with light distributing function

Publications (2)

Publication Number Publication Date
JPS5797741A true JPS5797741A (en) 1982-06-17
JPS6324575B2 JPS6324575B2 (en) 1988-05-21

Family

ID=15977745

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55174389A Granted JPS5797741A (en) 1980-12-10 1980-12-10 Optical transmission device with light distributing function

Country Status (1)

Country Link
JP (1) JPS5797741A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0372711A2 (en) * 1988-11-10 1990-06-13 AT&T Corp. Fail-safe optical transmission system
EP0427109A2 (en) * 1989-11-09 1991-05-15 Siemens Aktiengesellschaft Optical communication network

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5694850A (en) * 1979-12-28 1981-07-31 Fujitsu Ltd Optical transmission system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5694850A (en) * 1979-12-28 1981-07-31 Fujitsu Ltd Optical transmission system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0372711A2 (en) * 1988-11-10 1990-06-13 AT&T Corp. Fail-safe optical transmission system
EP0427109A2 (en) * 1989-11-09 1991-05-15 Siemens Aktiengesellschaft Optical communication network

Also Published As

Publication number Publication date
JPS6324575B2 (en) 1988-05-21

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