JPS6427334A - Duplex switching system - Google Patents

Duplex switching system

Info

Publication number
JPS6427334A
JPS6427334A JP62184145A JP18414587A JPS6427334A JP S6427334 A JPS6427334 A JP S6427334A JP 62184145 A JP62184145 A JP 62184145A JP 18414587 A JP18414587 A JP 18414587A JP S6427334 A JPS6427334 A JP S6427334A
Authority
JP
Japan
Prior art keywords
fault
hardware
supervisory control
control equipment
duplex
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
JP62184145A
Other languages
Japanese (ja)
Inventor
Takamasa Suzuki
Kazuyoshi Oshima
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP62184145A priority Critical patent/JPS6427334A/en
Publication of JPS6427334A publication Critical patent/JPS6427334A/en
Pending legal-status Critical Current

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  • Hardware Redundancy (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE:To reduce the time from the production of a fault till the performance of changeover by constituting a duplex switching circuit only by the hardware and incorporating the circuit to both of system 1 and system 2 equipments so as to allow only the hardware to apply switching at the occurrence of a fault independently of a command of a supervisory control equipment. CONSTITUTION:Duplex switching circuits 31, 32 are constituted of only hardware and a supervisory control equipment 5 is operated by the software. The circuits 31, 32 supervise fault alarms 1d, 2d. When no fault takes place in both the system 1, 2 equipments, since the duplex changeover is applied by the instruction of the supervisory control equipment, the duplex switching is applied by the software. When a fault takes place in any of the system 1, 2 equipments, since the duplex switching is applied at high speed by the hardware only independently of an instruction of the supervisory control equipment, the faulty time as the entire equipment is shortened.
JP62184145A 1987-07-22 1987-07-22 Duplex switching system Pending JPS6427334A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62184145A JPS6427334A (en) 1987-07-22 1987-07-22 Duplex switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62184145A JPS6427334A (en) 1987-07-22 1987-07-22 Duplex switching system

Publications (1)

Publication Number Publication Date
JPS6427334A true JPS6427334A (en) 1989-01-30

Family

ID=16148153

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62184145A Pending JPS6427334A (en) 1987-07-22 1987-07-22 Duplex switching system

Country Status (1)

Country Link
JP (1) JPS6427334A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0435241A (en) * 1990-05-25 1992-02-06 Nec Corp Transmission line interface device
JPH0546422A (en) * 1991-08-20 1993-02-26 Fujitsu Ltd Current/standby switching system
JPH07221739A (en) * 1994-01-19 1995-08-18 Internatl Business Mach Corp <Ibm> System and method for data processing for enhancement of availability

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0435241A (en) * 1990-05-25 1992-02-06 Nec Corp Transmission line interface device
JPH0546422A (en) * 1991-08-20 1993-02-26 Fujitsu Ltd Current/standby switching system
JPH07221739A (en) * 1994-01-19 1995-08-18 Internatl Business Mach Corp <Ibm> System and method for data processing for enhancement of availability

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