JPS6427334A - Duplex switching system - Google Patents
Duplex switching systemInfo
- 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
Links
Landscapes
- 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.
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)
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 |
-
1987
- 1987-07-22 JP JP62184145A patent/JPS6427334A/en active Pending
Cited By (3)
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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