JPS5575352A - Using/stand-by circuit switching system for signal transmission - Google Patents
Using/stand-by circuit switching system for signal transmissionInfo
- Publication number
- JPS5575352A JPS5575352A JP14786478A JP14786478A JPS5575352A JP S5575352 A JPS5575352 A JP S5575352A JP 14786478 A JP14786478 A JP 14786478A JP 14786478 A JP14786478 A JP 14786478A JP S5575352 A JPS5575352 A JP S5575352A
- Authority
- JP
- Japan
- Prior art keywords
- stand
- circuit
- level
- reception
- signal transmission
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To realize an extremely high-reliability signal transmission through automatic switching from the using circuit to the stand-by circuit in case the signal reception level of the using circuit side lowers less than the level of the stand-by circuit by a fixed level along with the reception level of the stand-by circuit kept at a level higher than the fixed value. CONSTITUTION:The transmission signals are branched into two parts at the transmission side, and these signals are transmitted at one time through the using and stand-by circuits each. On the other hand, the output levels of the channels in the using and stand-by circuits are monitored through level monitor circuits 13-1-13-n plus 14-1-14-n, and at the same time the comparison is given to the output levels through using/stand-by level comparators 15-1-15-n. And in case the reception signal level of the using circuit side lowers less than the reception level of the stand- by circuit side by a fixed level along with the reception level of the stand-by circuit kept at a level higher than the fixed value, a certain channel of whole channels are switched en bloc and automatically from the using circuit to the stand-by circuit. In such way, an extremely high-reliability signal transmission circuit can be realized.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14786478A JPS5575352A (en) | 1978-12-01 | 1978-12-01 | Using/stand-by circuit switching system for signal transmission |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14786478A JPS5575352A (en) | 1978-12-01 | 1978-12-01 | Using/stand-by circuit switching system for signal transmission |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5575352A true JPS5575352A (en) | 1980-06-06 |
JPS6138888B2 JPS6138888B2 (en) | 1986-09-01 |
Family
ID=15439964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14786478A Granted JPS5575352A (en) | 1978-12-01 | 1978-12-01 | Using/stand-by circuit switching system for signal transmission |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5575352A (en) |
-
1978
- 1978-12-01 JP JP14786478A patent/JPS5575352A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6138888B2 (en) | 1986-09-01 |
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