JPS5678267A - Light exchange system - Google Patents

Light exchange system

Info

Publication number
JPS5678267A
JPS5678267A JP15533879A JP15533879A JPS5678267A JP S5678267 A JPS5678267 A JP S5678267A JP 15533879 A JP15533879 A JP 15533879A JP 15533879 A JP15533879 A JP 15533879A JP S5678267 A JPS5678267 A JP S5678267A
Authority
JP
Japan
Prior art keywords
light
signal
switchboard
transmission line
control
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
JP15533879A
Other languages
Japanese (ja)
Other versions
JPS6210073B2 (en
Inventor
Takashi Toge
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 JP15533879A priority Critical patent/JPS5678267A/en
Publication of JPS5678267A publication Critical patent/JPS5678267A/en
Publication of JPS6210073B2 publication Critical patent/JPS6210073B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching

Abstract

PURPOSE:To enable exchange information transmission of high quality for various data by controlling the space switch of a switchboard by transmitting a control signal and the main signal of the 1st frequency component with a light signal from a subscriber's terminal and then by separating the control signal through a branching filter. CONSTITUTION:Subscriber's terminal system 1 consists of signal processor 4 for TV, telephone, FAX, etc., and receiver 5 to a transmission line, and transmission line 2 is composed of a optical fiber cable. Light switchboard 3 consists of branching circuits 7-1 and 7-2 that branch signal light controlling space switch 6, photoelectric converting circuits 8-1 and 8-2 that convert control signal light into an electric signal, and device 9 that processes the output signal to control switch 6. As for the wavelength of the light of the circuit constitution, one wave is assigned to the control light signal of switchboard 3, and two waves for two-way transmission between subscribers. Space switch 6 is composed of n+1 units of 1xn light switches 31-1-31-3 connected to the transmission lines from respective terminals, light transmission line 32 and light wavelength converter 33. Consequently, the wave-length to be used at each termial station becomes equal and the same light emitting element and photodetector may be used, so that the indepensive system can be constituted.
JP15533879A 1979-11-30 1979-11-30 Light exchange system Granted JPS5678267A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15533879A JPS5678267A (en) 1979-11-30 1979-11-30 Light exchange system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15533879A JPS5678267A (en) 1979-11-30 1979-11-30 Light exchange system

Publications (2)

Publication Number Publication Date
JPS5678267A true JPS5678267A (en) 1981-06-27
JPS6210073B2 JPS6210073B2 (en) 1987-03-04

Family

ID=15603700

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15533879A Granted JPS5678267A (en) 1979-11-30 1979-11-30 Light exchange system

Country Status (1)

Country Link
JP (1) JPS5678267A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62206997A (en) * 1986-03-07 1987-09-11 Hitachi Ltd Light time division exchanging method and device therefor
JPS6334519A (en) * 1986-07-29 1988-02-15 Nec Corp Optical switch
JPH01126095A (en) * 1987-11-11 1989-05-18 Oki Electric Ind Co Ltd Light wavelength multiplex self-routing switch

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5498505A (en) * 1978-01-20 1979-08-03 Nippon Telegr & Teleph Corp <Ntt> Optical exchanger for broad band signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5498505A (en) * 1978-01-20 1979-08-03 Nippon Telegr & Teleph Corp <Ntt> Optical exchanger for broad band signal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62206997A (en) * 1986-03-07 1987-09-11 Hitachi Ltd Light time division exchanging method and device therefor
JPS6334519A (en) * 1986-07-29 1988-02-15 Nec Corp Optical switch
JPH01126095A (en) * 1987-11-11 1989-05-18 Oki Electric Ind Co Ltd Light wavelength multiplex self-routing switch
JPH0787624B2 (en) * 1987-11-11 1995-09-20 沖電気工業株式会社 Optical wavelength multiplexing self-routing switch

Also Published As

Publication number Publication date
JPS6210073B2 (en) 1987-03-04

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