JPS56149155A - Transmission system for information on power failure - Google Patents

Transmission system for information on power failure

Info

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
Application number
JP5157880A
Other languages
Japanese (ja)
Inventor
Shizuo Sugiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP5157880A priority Critical patent/JPS56149155A/en
Publication of JPS56149155A publication Critical patent/JPS56149155A/en
Pending legal-status Critical Current

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.
JP5157880A 1980-04-21 1980-04-21 Transmission system for information on power failure Pending JPS56149155A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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