JPS6412745A - Main signal bypassing system - Google Patents
Main signal bypassing systemInfo
- Publication number
- JPS6412745A JPS6412745A JP62170095A JP17009587A JPS6412745A JP S6412745 A JPS6412745 A JP S6412745A JP 62170095 A JP62170095 A JP 62170095A JP 17009587 A JP17009587 A JP 17009587A JP S6412745 A JPS6412745 A JP S6412745A
- Authority
- JP
- Japan
- Prior art keywords
- power source
- main signal
- disconnection
- relay
- disconnected
- 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
- Communication Control (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
Abstract
PURPOSE:To pass a main signal even when a power source is disconnected, by constituting a system in such a way that a bypassing path is provided between the input of a test data inserting and branching device and a selector, and also, a power source disconnection detecting part to detect the disconnection of the power source is provided at a disconnected power source, and a bypassing side is selected at the time of detecting the disconnection of the power source at the said power source disconnection detecting part. CONSTITUTION:A delay circuit 3 is provided at the output of a test data inserting and branching circuit 2, and the bypassing path 5 is provided from a digital main signal input part, and a relay RL for detecting the disconnection of the dedicated power source 1 is provided, and the contact rl of the relay RL is provided as the selector. The system is constituted in such a way that the digital main signal can be outputted passing the bypassing path 5 when the output of the dedicated power source 1 is supplied and operated to the relay RL, and the contact rl is connected to continuous line side generally, and a digital main signal can be outputted passing the side of the test data inserting and branching circuit 2, and the dedicated power source 1 is disconnected, the relay RL is recovered, and the contact rl is connected to a dotted line side. Therefore, it is possible to pass the digital main signal without generating step out in a device at a succeeding stage even when the dedicated power source 1 is disconnected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62170095A JPS6412745A (en) | 1987-07-07 | 1987-07-07 | Main signal bypassing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62170095A JPS6412745A (en) | 1987-07-07 | 1987-07-07 | Main signal bypassing system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6412745A true JPS6412745A (en) | 1989-01-17 |
Family
ID=15898547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62170095A Pending JPS6412745A (en) | 1987-07-07 | 1987-07-07 | Main signal bypassing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6412745A (en) |
-
1987
- 1987-07-07 JP JP62170095A patent/JPS6412745A/en active Pending
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