JPS6473921A - Backup system - Google Patents

Backup system

Info

Publication number
JPS6473921A
JPS6473921A JP23180887A JP23180887A JPS6473921A JP S6473921 A JPS6473921 A JP S6473921A JP 23180887 A JP23180887 A JP 23180887A JP 23180887 A JP23180887 A JP 23180887A JP S6473921 A JPS6473921 A JP S6473921A
Authority
JP
Japan
Prior art keywords
controller
controllers
outgoing
changeover device
line
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
JP23180887A
Other languages
Japanese (ja)
Inventor
Hiroo Naeki
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 JP23180887A priority Critical patent/JPS6473921A/en
Publication of JPS6473921A publication Critical patent/JPS6473921A/en
Pending legal-status Critical Current

Links

Landscapes

  • Selective Calling Equipment (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

PURPOSE:To allow plural devices to act like a backup device by providing a changeover device able to easily intercept a data stream of an incoming line and an outgoing line. CONSTITUTION:Controllers 1-3 are connected to a 4-wire line via a changeover device 10 to allow a designation means 20 of the changeover device 10 to use the controller 1 as an active set and the controller 2 as a standby set, for example, and when a fault takes place in the active controller 1, the controller 2 designated by the designation means 20 sends a transmission request signal RS2. Then an outgoing line selection means 30 sends a transmission data of the controller 2 to the outgoing 4-wire line and returns it to the receiver side of the controllers 1-3. Thus, it is possible to operate sequentially the plural controllers 1-3 as a backup device.
JP23180887A 1987-09-16 1987-09-16 Backup system Pending JPS6473921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23180887A JPS6473921A (en) 1987-09-16 1987-09-16 Backup system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23180887A JPS6473921A (en) 1987-09-16 1987-09-16 Backup system

Publications (1)

Publication Number Publication Date
JPS6473921A true JPS6473921A (en) 1989-03-20

Family

ID=16929341

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23180887A Pending JPS6473921A (en) 1987-09-16 1987-09-16 Backup system

Country Status (1)

Country Link
JP (1) JPS6473921A (en)

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