JPS55158795A - Optical exchanger - Google Patents

Optical exchanger

Info

Publication number
JPS55158795A
JPS55158795A JP6495779A JP6495779A JPS55158795A JP S55158795 A JPS55158795 A JP S55158795A JP 6495779 A JP6495779 A JP 6495779A JP 6495779 A JP6495779 A JP 6495779A JP S55158795 A JPS55158795 A JP S55158795A
Authority
JP
Japan
Prior art keywords
optical
circuit
signal
exchanger
photodetector
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
JP6495779A
Other languages
Japanese (ja)
Inventor
Hiroshi Nakamura
Naomasa Hanano
Tsutomu Fukugahara
Kazuo Iguchi
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 JP6495779A priority Critical patent/JPS55158795A/en
Publication of JPS55158795A publication Critical patent/JPS55158795A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/526—Optical switching systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To realize the minaturization of the optical exchanger as well as the wide- band performance of the optical fiber, by securing the sharing of the photodetector for many subscribers and then detecting both the start and finish calls of the subscriber based on the state of the optical signal. CONSTITUTION:When subscriber 1 picks up the telephone receiver, the optical signal is transmitted to enter optical exchanger 2 via optical fiber cable 3. And part of the signal is extracted through optical branching circuit 11 in exchanger 2 and then supplied to photo-detecting circuit 13 through optical fiber 12. In circuit 13 fiber 12 is scanned in sequence by one unit of the photodetector to convert the optical signal into the electric signal. This electric signal is stored in the memory circuits provided each in correspondence to each of fibers 12 and via the change- over switch which operates in synchronization with the photodetector. The information of the memory circuit corresponds to both the start and finish calls of the subscriber. In this connection, the control is given to channel connecting optical switch 9 with actuation of connection control circuit 10. Thus the connection is secured.
JP6495779A 1979-05-28 1979-05-28 Optical exchanger Pending JPS55158795A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6495779A JPS55158795A (en) 1979-05-28 1979-05-28 Optical exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6495779A JPS55158795A (en) 1979-05-28 1979-05-28 Optical exchanger

Publications (1)

Publication Number Publication Date
JPS55158795A true JPS55158795A (en) 1980-12-10

Family

ID=13273027

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6495779A Pending JPS55158795A (en) 1979-05-28 1979-05-28 Optical exchanger

Country Status (1)

Country Link
JP (1) JPS55158795A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151190A (en) * 1981-12-23 1983-09-08 ジ−メンス・アクチエンゲゼルシヤフト Method of controlling photoelectric connecting point of exchange unit
JPS6051342A (en) * 1983-08-31 1985-03-22 Fujitsu Ltd Optical communication system between processors
JPH04249993A (en) * 1991-01-08 1992-09-04 Nippon Telegr & Teleph Corp <Ntt> Automatic optical mdf

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52101905A (en) * 1976-02-23 1977-08-26 Hitachi Ltd Parallel drive circuit in current switching scanning method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52101905A (en) * 1976-02-23 1977-08-26 Hitachi Ltd Parallel drive circuit in current switching scanning method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151190A (en) * 1981-12-23 1983-09-08 ジ−メンス・アクチエンゲゼルシヤフト Method of controlling photoelectric connecting point of exchange unit
JPH0113791B2 (en) * 1981-12-23 1989-03-08 Siemens Ag
JPS6051342A (en) * 1983-08-31 1985-03-22 Fujitsu Ltd Optical communication system between processors
JPH04249993A (en) * 1991-01-08 1992-09-04 Nippon Telegr & Teleph Corp <Ntt> Automatic optical mdf

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