JPS56149154A - Transmission system for information on power failure - Google Patents

Transmission system for information on power failure

Info

Publication number
JPS56149154A
JPS56149154A JP5157780A JP5157780A JPS56149154A JP S56149154 A JPS56149154 A JP S56149154A JP 5157780 A JP5157780 A JP 5157780A JP 5157780 A JP5157780 A JP 5157780A JP S56149154 A JPS56149154 A JP S56149154A
Authority
JP
Japan
Prior art keywords
power failure
circuit
transmission
power
reception
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
JP5157780A
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 JP5157780A priority Critical patent/JPS56149154A/en
Publication of JPS56149154A publication Critical patent/JPS56149154A/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

Abstract

PURPOSE:To miniaturize a storage battery used during power failure by minimizing a circuit operating during the power failure by adding a function of transmitting information on the power failure to the transmission part of a modulator-demodulator and by informing a master station of the power failure. 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 5; an AC voltage from power-source input terminal 21 is converted by circuit 5 into a DC voltage, which is applied to transmission part 1 and reception part 2. To this circuit 5, power-failure information detection and power source switching relay part 3 connected to storage battery 4 is connected. Further, transmission part 1 is provided with transmission input terminal 17, transmission output terminal 19 and circuit block 6 which operates during a power failure, and reception part 2 with reception data output terminal 18 and reception input terminal 20. On a power failure, contacts a1 and a2 of relay part 3 are changed over to contact b1 and b2 to transfer the power failure information to the master station while minimizing the operating circuit of transmission part 1, so that storage battery 4 used during the power failure is minimized.
JP5157780A 1980-04-21 1980-04-21 Transmission system for information on power failure Pending JPS56149154A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5157780A JPS56149154A (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
JP5157780A JPS56149154A (en) 1980-04-21 1980-04-21 Transmission system for information on power failure

Publications (1)

Publication Number Publication Date
JPS56149154A true JPS56149154A (en) 1981-11-18

Family

ID=12890792

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5157780A Pending JPS56149154A (en) 1980-04-21 1980-04-21 Transmission system for information on power failure

Country Status (1)

Country Link
JP (1) JPS56149154A (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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