KR970009549B1 - Telephone power detector - Google Patents

Telephone power detector Download PDF

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Publication number
KR970009549B1
KR970009549B1 KR94027377A KR19940027377A KR970009549B1 KR 970009549 B1 KR970009549 B1 KR 970009549B1 KR 94027377 A KR94027377 A KR 94027377A KR 19940027377 A KR19940027377 A KR 19940027377A KR 970009549 B1 KR970009549 B1 KR 970009549B1
Authority
KR
South Korea
Prior art keywords
power
telephone
signal
supply
light
Prior art date
Application number
KR94027377A
Other languages
Korean (ko)
Other versions
KR960016366A (en
Inventor
Yun-Hwan Oh
Original Assignee
Daewoo Telecom Co Ltd
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 Daewoo Telecom Co Ltd filed Critical Daewoo Telecom Co Ltd
Priority to KR94027377A priority Critical patent/KR970009549B1/en
Publication of KR960016366A publication Critical patent/KR960016366A/en
Application granted granted Critical
Publication of KR970009549B1 publication Critical patent/KR970009549B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

A power discrimination detection apparatus of a telephone changes an algorithm without making an additional switch circuit and another circuit, and simply sets a hardward function. Accordingly, in a telephone using an auxiliary power device in case of a power failure, the power discrimination detection apparatus easily detects whether a present power is a main power or an auxiliary power, and prevents a malfunction of the telephone. The apparatus includes: a main power-supply(10) for providing an externally-supplied power; auxiliary power-supply(20) for providing a power to a telephone when there is no power applied from the main power-supply(10) to the telephone; a power discrimination detector(30) for determining whether the power supplied to the telephon is from the main power-supply(10) or from the auxiliary power-supply(20); a controller(40) for generating a control signal after receiving a determined signal from the power discrimination detector(30); and a display driver(50) for outputting a light-on signal or light-off signal according to a control signal from the controller(40); and a display(60) which is turned on or off according to the light-on signal or the light-off signal from the display driver(50).
KR94027377A 1994-10-26 1994-10-26 Telephone power detector KR970009549B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR94027377A KR970009549B1 (en) 1994-10-26 1994-10-26 Telephone power detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR94027377A KR970009549B1 (en) 1994-10-26 1994-10-26 Telephone power detector

Publications (2)

Publication Number Publication Date
KR960016366A KR960016366A (en) 1996-05-22
KR970009549B1 true KR970009549B1 (en) 1997-06-14

Family

ID=19395893

Family Applications (1)

Application Number Title Priority Date Filing Date
KR94027377A KR970009549B1 (en) 1994-10-26 1994-10-26 Telephone power detector

Country Status (1)

Country Link
KR (1) KR970009549B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3051716B1 (en) * 2016-05-31 2020-09-25 Saint Gobain LAMINATED GLAZING WITH A FUNCTIONAL LAYER DEMARGED

Also Published As

Publication number Publication date
KR960016366A (en) 1996-05-22

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