JPS5642445A - Terminal station separating device of terminal station of loop-shaped optical transmission system - Google Patents

Terminal station separating device of terminal station of loop-shaped optical transmission system

Info

Publication number
JPS5642445A
JPS5642445A JP11811779A JP11811779A JPS5642445A JP S5642445 A JPS5642445 A JP S5642445A JP 11811779 A JP11811779 A JP 11811779A JP 11811779 A JP11811779 A JP 11811779A JP S5642445 A JPS5642445 A JP S5642445A
Authority
JP
Japan
Prior art keywords
terminal station
fault
optical transmission
timer
loop
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
JP11811779A
Other languages
Japanese (ja)
Other versions
JPS598099B2 (en
Inventor
Hiroshi Ishida
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.)
Meidensha Electric Manufacturing Co Ltd
Original Assignee
Meidensha Electric Manufacturing Co 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 Meidensha Electric Manufacturing Co Ltd filed Critical Meidensha Electric Manufacturing Co Ltd
Priority to JP54118117A priority Critical patent/JPS598099B2/en
Publication of JPS5642445A publication Critical patent/JPS5642445A/en
Publication of JPS598099B2 publication Critical patent/JPS598099B2/en
Expired 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
    • H04Q11/0062—Network aspects
    • 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
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability
    • 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
    • H04Q11/0062—Network aspects
    • H04Q2011/009—Topology aspects
    • H04Q2011/0092—Ring

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To reduce a light loss and to simplify unit constitution by detecting the reception state of a terminal station from the output state of a light receiver that corresponds to the terminal station. CONSTITUTION:In the terminal-station separating device (encircled by the dotted line) of the terminal station, reception detecting circuit 23, timer 24 and OR gate 25 are connected by interposing. A photosignal passed through photoswitch 7 enters light receiver 12 via optical fiber 9 and when reception detecting circuit 23 detects a reception state, its detection output A' is compared to a signal from optical transmission monitor 21 by fault detecting circuit 22 to decide the occurrence of a fault, but even if receiver 12 is assumed to be in trouble in this case, the fault occurrence can not be detected. For this purpose, timer 24 (actuated as signal A' is ceased) is provided and as far as timer 24 continues to operate for a certain time, switch 7 is put into operation via gate 25 even when no fault is detected 22, disconnecting the terminal station from loop-shaped optical transmission lines 6 and 8.
JP54118117A 1979-09-14 1979-09-14 Terminal station separation device for terminal stations in a loop optical transmission system Expired JPS598099B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54118117A JPS598099B2 (en) 1979-09-14 1979-09-14 Terminal station separation device for terminal stations in a loop optical transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54118117A JPS598099B2 (en) 1979-09-14 1979-09-14 Terminal station separation device for terminal stations in a loop optical transmission system

Publications (2)

Publication Number Publication Date
JPS5642445A true JPS5642445A (en) 1981-04-20
JPS598099B2 JPS598099B2 (en) 1984-02-22

Family

ID=14728443

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54118117A Expired JPS598099B2 (en) 1979-09-14 1979-09-14 Terminal station separation device for terminal stations in a loop optical transmission system

Country Status (1)

Country Link
JP (1) JPS598099B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4681397A (en) * 1985-06-28 1987-07-21 Amp Incorporated Optical switching arrangement
US4761832A (en) * 1985-06-28 1988-08-02 Amp Incorporated Fiber optic switching network

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4681397A (en) * 1985-06-28 1987-07-21 Amp Incorporated Optical switching arrangement
US4761832A (en) * 1985-06-28 1988-08-02 Amp Incorporated Fiber optic switching network

Also Published As

Publication number Publication date
JPS598099B2 (en) 1984-02-22

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