KR870000812A - Busy Indicator on the Phone - Google Patents

Busy Indicator on the Phone Download PDF

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Publication number
KR870000812A
KR870000812A KR1019850004366A KR850004366A KR870000812A KR 870000812 A KR870000812 A KR 870000812A KR 1019850004366 A KR1019850004366 A KR 1019850004366A KR 850004366 A KR850004366 A KR 850004366A KR 870000812 A KR870000812 A KR 870000812A
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KR
South Korea
Prior art keywords
busy indicator
transistor
led
telephone
resistor
Prior art date
Application number
KR1019850004366A
Other languages
Korean (ko)
Inventor
이정근
Original Assignee
이정근
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 이정근 filed Critical 이정근
Priority to KR1019850004366A priority Critical patent/KR870000812A/en
Publication of KR870000812A publication Critical patent/KR870000812A/en

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  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

내용 없음.No content.

Description

전화기의 비지 인디케이터(Busy Indicator)Busy Indicator on the Phone

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 의한 전화기에 LED를 설치한 상태를 간략하게 예시한 도면.2 is a view briefly illustrating a state in which the LED is installed in the telephone according to the present invention.

제3도는 기존의 전화기에 본 발명의 실시예에 의한 별도의 전원을 사용할 때의 구체적인 비지 인디케이터의 회로도.3 is a circuit diagram of a specific busy indicator when using a separate power supply according to an embodiment of the present invention in an existing telephone.

제4도는 국선 1회선에 여러대의 전화기를 병렬로 연결하여 사용할 때 상술한 본 발명의 실시예에 의한 전체적인 실시상태도.Figure 4 is an overall embodiment according to the embodiment of the present invention described above when using a plurality of telephones connected in parallel to the trunk line.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

L1,L2: 선로 D1,D2,D3,D4: 다이오우드L 1 , L 2 : Track D 1 , D 2 , D 3 , D 4 : Diode

R1,R2,R3: 저항기 LED : 발광다이오우드R 1 , R 2 , R 3 : Resistor LED: Light Emitting Diode

TR1,TR2: 트랜지스터 S/W : 후크스위치(Hook Switch)TR 1 , TR 2 : Transistor S / W: Hook Switch

Claims (2)

전화기의 비지 인디케이터에 있어서, 후크스위치(S/W) 이전의 가압자선로(L1)(L2)상에 별도의 전원을 사용한 비지 인디케이터를 설치함을 특징으로 하는 전화기의 비지 인디케이터.A busy indicator of a telephone, comprising: a busy indicator using a separate power supply on a pressurized magnetic path (L 1 ) (L 2 ) before a hook switch (S / W). 제1항에 있어서, 상기 비지 인디케이터는 다이오우드(D1)(D2)(D3)(D4)와 저항기(R1)(R2)(R3)로 형성되는 전압검지회로(A)와, 상기 전압검지회로(A)들 중의 저항기(R2)(R3)에 연결되는 베이스 입력단자를 가지는 PNP트랜지스터(TR1)와 상기 PNP트랜지스터(TR1)의 콜렉터 출력단자에 연결된 베이스 입력단자를 가지는 NPN트랜지스터(TR2)로 구성되는 증폭회로(B)와, 상기 NPN트랜지스터(TR2)의 에미터 출력단자에 연결된 발광다이오우드(LED)와, 상기 트랜지스터(TR1)(TR2)들의 에미터 및 콜렉터 입력단자와 발광다이오우드(LED)와 저항기(R3)에 연결된 전원(BATT)으로 구성됨을 특징으로 하는 전화기의 비지 인디케이터.The voltage detecting circuit (A) of claim 1, wherein the busy indicator is formed of a diode (D 1 ) (D 2 ) (D 3 ) (D 4 ) and a resistor (R 1 ) (R 2 ) (R 3 ). And a base input connected to a PNP transistor TR 1 having a base input terminal connected to the resistors R 2 and R 3 in the voltage detection circuits A and a collector output terminal of the PNP transistor TR 1 . amplifier consisting of the NPN transistor (TR 2) having a terminal circuit (B) and, as the light emitting diode (LED) connected to an emitter output terminal of the NPN transistor (TR 2), the transistor (TR 1) (TR 2) Busy indicator of a telephone, characterized in that it consists of an emitter and collector input terminal of the lamp and a power supply (BATT) connected to a light emitting diode (LED) and a resistor (R 3 ). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019850004366A 1985-06-20 1985-06-20 Busy Indicator on the Phone KR870000812A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019850004366A KR870000812A (en) 1985-06-20 1985-06-20 Busy Indicator on the Phone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019850004366A KR870000812A (en) 1985-06-20 1985-06-20 Busy Indicator on the Phone

Publications (1)

Publication Number Publication Date
KR870000812A true KR870000812A (en) 1987-02-20

Family

ID=69136741

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019850004366A KR870000812A (en) 1985-06-20 1985-06-20 Busy Indicator on the Phone

Country Status (1)

Country Link
KR (1) KR870000812A (en)

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