JPS6449435A - Line protection switching device - Google Patents
Line protection switching deviceInfo
- Publication number
- JPS6449435A JPS6449435A JP20508387A JP20508387A JPS6449435A JP S6449435 A JPS6449435 A JP S6449435A JP 20508387 A JP20508387 A JP 20508387A JP 20508387 A JP20508387 A JP 20508387A JP S6449435 A JPS6449435 A JP S6449435A
- Authority
- JP
- Japan
- Prior art keywords
- line
- switch
- switches
- over
- equipment
- 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
Abstract
PURPOSE:To control a line change-over switch with a large scale at high speed, by controlling each group of the line change-over switches independently by a line switching controller. CONSTITUTION:A line signal to be inputted and outputted to/from a spare line terminal equipment 4 and a current in use line terminal equipment 3 is interfaced with the outside via the line change-over switch 2. The switch 2 is divided into plural groups, and they are connected to separate line switching controllers 1 corresponding to respective group. The line signal performs communication with an opposite station by the equipment 3 in an ordinary state, however, when abnormality is generated in a line current in use, the controller 1 detects the fact, and switches the line signal to the equipment 4 side by operating the switch 2. Thus, since the switch 2 in each group is controlled by plural controllers independently, it is possible to prevent the switching time of the line from being extended over an allowable value even when the number of line switches to be handled are increased.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20508387A JPS6449435A (en) | 1987-08-20 | 1987-08-20 | Line protection switching device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20508387A JPS6449435A (en) | 1987-08-20 | 1987-08-20 | Line protection switching device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6449435A true JPS6449435A (en) | 1989-02-23 |
Family
ID=16501142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20508387A Pending JPS6449435A (en) | 1987-08-20 | 1987-08-20 | Line protection switching device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6449435A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5308682A (en) * | 1991-10-01 | 1994-05-03 | Nec Corporation | Alignment check pattern for multi-level interconnection |
-
1987
- 1987-08-20 JP JP20508387A patent/JPS6449435A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5308682A (en) * | 1991-10-01 | 1994-05-03 | Nec Corporation | Alignment check pattern for multi-level interconnection |
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