JPS5654534A - Switching control circuit - Google Patents

Switching control circuit

Info

Publication number
JPS5654534A
JPS5654534A JP13003179A JP13003179A JPS5654534A JP S5654534 A JPS5654534 A JP S5654534A JP 13003179 A JP13003179 A JP 13003179A JP 13003179 A JP13003179 A JP 13003179A JP S5654534 A JPS5654534 A JP S5654534A
Authority
JP
Japan
Prior art keywords
transmission line
reception
change
line
abnormality
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
JP13003179A
Other languages
Japanese (ja)
Inventor
Takashi Domoto
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13003179A priority Critical patent/JPS5654534A/en
Publication of JPS5654534A publication Critical patent/JPS5654534A/en
Pending legal-status Critical Current

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  • Small-Scale Networks (AREA)
  • Hardware Redundancy (AREA)

Abstract

PURPOSE: To obtain an inexpensive switching control circuit for the breaking of a transmission line by providing a change-over circuit at the terminal point of the transmission line and by supervising and changing over the transmission line at the terminal point.
CONSTITUTION: Central controller 1 is connected to terminals 2-1W2-N and change- over device 8 via transmission line 3 and reception line 4 and provides transmission and reception of information signals in the known method. On the basis of received signals from reception signal 4, central controller 1 exercises a supervision over abnormality of reception signal 4 and change-over device 8 supervises abnormality of transmission line 3 on the basis of signals from transmission line 3. If abnormality is detected on transmission line 3 or reception line 4, central controller 1 and change- over device 8 cooperate with each other to make connections between stand-by transmission line 9 and transmission line 3, and stand-by reception line 10 and reception line 4 in change-over device 8, thereby evading the abnormality.
COPYRIGHT: (C)1981,JPO&Japio
JP13003179A 1979-10-11 1979-10-11 Switching control circuit Pending JPS5654534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13003179A JPS5654534A (en) 1979-10-11 1979-10-11 Switching control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13003179A JPS5654534A (en) 1979-10-11 1979-10-11 Switching control circuit

Publications (1)

Publication Number Publication Date
JPS5654534A true JPS5654534A (en) 1981-05-14

Family

ID=15024431

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13003179A Pending JPS5654534A (en) 1979-10-11 1979-10-11 Switching control circuit

Country Status (1)

Country Link
JP (1) JPS5654534A (en)

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