JPS57109439A - Optical data highway device - Google Patents

Optical data highway device

Info

Publication number
JPS57109439A
JPS57109439A JP55186806A JP18680680A JPS57109439A JP S57109439 A JPS57109439 A JP S57109439A JP 55186806 A JP55186806 A JP 55186806A JP 18680680 A JP18680680 A JP 18680680A JP S57109439 A JPS57109439 A JP S57109439A
Authority
JP
Japan
Prior art keywords
node
transmission lines
lowering
level
highway
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
JP55186806A
Other languages
Japanese (ja)
Inventor
Yoshihiro Kitano
Teruyoshi Mita
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 JP55186806A priority Critical patent/JPS57109439A/en
Publication of JPS57109439A publication Critical patent/JPS57109439A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To reconstitute a loop, by providing a means, which detects the lowering of the level of an optical signal, in the station node and monitoring this means by a highway monotor device. CONSTITUTION:When the optical level from optical transmission lines L0 and L1 is lowered, a transmission abnormality detecting part 6 detects this lowering and reports it to a control part 3. The control part 3 stores this information in a node status register and writes contents of the node status register into the node response part in a frame DF flowed to transmission lines L0 and L1 and reports it to a highway monitor device. Meanwhile, the highway monitor device analyzes the node response and discriminates the lowering of the level of the optical signal to issue a node command, and transmission lines are reconstituted by switching of transmission lines from the current system to the stand-by system, issuing of a folding command to a specific station node, etc.
JP55186806A 1980-12-26 1980-12-26 Optical data highway device Pending JPS57109439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55186806A JPS57109439A (en) 1980-12-26 1980-12-26 Optical data highway device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55186806A JPS57109439A (en) 1980-12-26 1980-12-26 Optical data highway device

Publications (1)

Publication Number Publication Date
JPS57109439A true JPS57109439A (en) 1982-07-07

Family

ID=16194905

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55186806A Pending JPS57109439A (en) 1980-12-26 1980-12-26 Optical data highway device

Country Status (1)

Country Link
JP (1) JPS57109439A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102222A2 (en) * 1982-08-30 1984-03-07 Fujitsu Limited Loop transmission system and method of controlling its loop-back condition
JPS60216638A (en) * 1984-04-12 1985-10-30 Mitsubishi Electric Corp Information transmitter of automobile
JPS6126346A (en) * 1984-07-17 1986-02-05 Nippon Telegr & Teleph Corp <Ntt> Controlling system of loop network
JPH01152827A (en) * 1987-12-10 1989-06-15 Oki Electric Ind Co Ltd Line automatic switching method
JPH03171950A (en) * 1989-11-30 1991-07-25 Toshiba Corp Optical ring bus control system
JP2008195133A (en) * 2007-02-09 2008-08-28 Nippon Plast Co Ltd Wind direction adjusting device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102222A2 (en) * 1982-08-30 1984-03-07 Fujitsu Limited Loop transmission system and method of controlling its loop-back condition
JPS60216638A (en) * 1984-04-12 1985-10-30 Mitsubishi Electric Corp Information transmitter of automobile
JPS6126346A (en) * 1984-07-17 1986-02-05 Nippon Telegr & Teleph Corp <Ntt> Controlling system of loop network
JPH0546735B2 (en) * 1984-07-17 1993-07-14 Nippon Telegraph & Telephone
JPH01152827A (en) * 1987-12-10 1989-06-15 Oki Electric Ind Co Ltd Line automatic switching method
JPH03171950A (en) * 1989-11-30 1991-07-25 Toshiba Corp Optical ring bus control system
JP2008195133A (en) * 2007-02-09 2008-08-28 Nippon Plast Co Ltd Wind direction adjusting device

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