JPS5619258A - Gentralized monitor control system - Google Patents

Gentralized monitor control system

Info

Publication number
JPS5619258A
JPS5619258A JP9419479A JP9419479A JPS5619258A JP S5619258 A JPS5619258 A JP S5619258A JP 9419479 A JP9419479 A JP 9419479A JP 9419479 A JP9419479 A JP 9419479A JP S5619258 A JPS5619258 A JP S5619258A
Authority
JP
Japan
Prior art keywords
circuit
stations
master
circuits
station
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
JP9419479A
Other languages
Japanese (ja)
Other versions
JPS6150544B2 (en
Inventor
Masahiko Shimizu
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.)
Fuji Electric Co Ltd
Fuji Facom Corp
Original Assignee
Fuji Electric Co Ltd
Fuji Facom Corp
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 Fuji Electric Co Ltd, Fuji Facom Corp filed Critical Fuji Electric Co Ltd
Priority to JP9419479A priority Critical patent/JPS5619258A/en
Publication of JPS5619258A publication Critical patent/JPS5619258A/en
Publication of JPS6150544B2 publication Critical patent/JPS6150544B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Selective Calling Equipment (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To ensure the highly efficient maintenance and checking in a simple constitution, by connecting the main master station to the secondary master station and slave station via the 1st and 2nd up-circuits and then detecting the fault occurring to the up-circuits at the master stations to change-over the circuits. CONSTITUTION:The connection is secured among slave station 21, main master station 22 and secondary master station 23 via up-circuit 24 and down-circuit 25 each. The up-circuit possesses the 1st and 2nd circuits 241 and 242 and is then connected to the both master stations via circuit change-over switches 26 and 27. Slave station 21 is provided in plural numbers, and its transmitting circuit consists of modulator 31, hybrid transformer 32, level adjusters 33 and 34 plus circuit changeover switch 35 each. Adjusters 33 and 34 are controlled so that the transmission signal arriving levels to the both master stations may be equal to each other in accordance with the distances to the both master stations. And now if the fault occurs at point A of circuit 242 and in the state of connection of each switch as shown in the figure, this fault is detected at stations 23, 22 and 21 each. Then the changeover is given among switches 27, 26 and 35 to transmit the signal sent from the slave station to the direction of the dotted line in the figure. In such way, the reception with the steady receiving level is possible at each of the two stations.
JP9419479A 1979-07-26 1979-07-26 Gentralized monitor control system Granted JPS5619258A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9419479A JPS5619258A (en) 1979-07-26 1979-07-26 Gentralized monitor control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9419479A JPS5619258A (en) 1979-07-26 1979-07-26 Gentralized monitor control system

Publications (2)

Publication Number Publication Date
JPS5619258A true JPS5619258A (en) 1981-02-23
JPS6150544B2 JPS6150544B2 (en) 1986-11-05

Family

ID=14103482

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9419479A Granted JPS5619258A (en) 1979-07-26 1979-07-26 Gentralized monitor control system

Country Status (1)

Country Link
JP (1) JPS5619258A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0413398A (en) * 1990-04-30 1992-01-17 Nippon Signal Co Ltd:The Position information collection device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0413398A (en) * 1990-04-30 1992-01-17 Nippon Signal Co Ltd:The Position information collection device

Also Published As

Publication number Publication date
JPS6150544B2 (en) 1986-11-05

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