JPS56149155A - Transmission system for information on power failure - Google Patents
Transmission system for information on power failureInfo
- Publication number
- JPS56149155A JPS56149155A JP5157880A JP5157880A JPS56149155A JP S56149155 A JPS56149155 A JP S56149155A JP 5157880 A JP5157880 A JP 5157880A JP 5157880 A JP5157880 A JP 5157880A JP S56149155 A JPS56149155 A JP S56149155A
- Authority
- JP
- Japan
- Prior art keywords
- power
- transmission
- circuit
- storage battery
- terminal
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/44—Arrangements for feeding power to a repeater along the transmission line
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
PURPOSE:To miniaturize a substation equipment by reducing the capacity of a storage battery used in a power failure, by adding to a power-failure information output and a power-source switching circuit to an equipment which performs data transmission. CONSTITUTION:The equipment which performs data transmission by using a frequency shift modulation system is provided with transmission part 1, reception part 2 and DC power source circuit 3, and further provided with power-failure information output and power-source switching circuit 5 connected to storage battery 4. This circuit 5 is provided with contact a2 connected to transmission data input terminal 6 and contact a1 for the supply of the DC voltage from power source circuit 3 to transmission part 1, and in normal operation, transmitted data from terminal 6 is outputted to transmission output terminal 8. Once the output of circuit 3 is ceased owing to a power failure, contacts a1 and a2 of switching circuit 5 are changed over to contacts b1 and b2 to apply the voltage of storage battery 4 to transmission part 1 without reference to the input to terminal 6, so that while the power consumption of storage battery 4 is reduced, information on the power failure is transferred to a master station.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5157880A JPS56149155A (en) | 1980-04-21 | 1980-04-21 | Transmission system for information on power failure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5157880A JPS56149155A (en) | 1980-04-21 | 1980-04-21 | Transmission system for information on power failure |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56149155A true JPS56149155A (en) | 1981-11-18 |
Family
ID=12890819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5157880A Pending JPS56149155A (en) | 1980-04-21 | 1980-04-21 | Transmission system for information on power failure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56149155A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0547329A2 (en) * | 1991-12-19 | 1993-06-23 | Dsc Communications Corporation | Apparatus and method for monitoring power loss in a telecommunication system |
-
1980
- 1980-04-21 JP JP5157880A patent/JPS56149155A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0547329A2 (en) * | 1991-12-19 | 1993-06-23 | Dsc Communications Corporation | Apparatus and method for monitoring power loss in a telecommunication system |
EP0547329A3 (en) * | 1991-12-19 | 1994-05-18 | Dsc Communications | Apparatus and method for monitoring power loss in a telecommunication system |
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