KR910003756Y1 - Telephone circuit for broadcasting an announcement before on-line - Google Patents

Telephone circuit for broadcasting an announcement before on-line Download PDF

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Publication number
KR910003756Y1
KR910003756Y1 KR2019850007236U KR850007236U KR910003756Y1 KR 910003756 Y1 KR910003756 Y1 KR 910003756Y1 KR 2019850007236 U KR2019850007236 U KR 2019850007236U KR 850007236 U KR850007236 U KR 850007236U KR 910003756 Y1 KR910003756 Y1 KR 910003756Y1
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KR
South Korea
Prior art keywords
relay
telephone
contact
telephone circuit
broadcasting
Prior art date
Application number
KR2019850007236U
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Korean (ko)
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KR870001322U (en
Inventor
김봉용
Original Assignee
김봉영
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Priority to KR2019850007236U priority Critical patent/KR910003756Y1/en
Publication of KR870001322U publication Critical patent/KR870001322U/en
Application granted granted Critical
Publication of KR910003756Y1 publication Critical patent/KR910003756Y1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6016—Substation equipment, e.g. for use by subscribers including speech amplifiers in the receiver circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/39—Electronic components, circuits, software, systems or apparatus used in telephone systems using speech synthesis

Abstract

내용 없음.No content.

Description

통화전 임의의 주의문이 청취되는 전화기 회로Telephone circuit where any notice is heard before a call

첨부도면은 본 고안의 회로도이다.The accompanying drawings are circuit diagrams of the present invention.

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

HS : 훅 스위치 10 : 음성메모리HS: Hook Switch 10: Voice Memory

20 : 수화기20: handset

본 고안은 통상의 전화기 또는 차재용 이동무선전화기(이하 이들을 '전화기'라 약칭한다)에 관한 것이다.The present invention relates to a conventional telephone or a mobile radio telephone for a vehicle (hereinafter referred to as "telephone").

종래의 '전화기'는 다음과 같은 보안상의 취약점이 있었다. 첫째 통상의 전화기는 장거리 통화를 할 경우 대개 통신의 대량수요에 부응하여 건설된 마이크로 웨이브 중계망을 거치게 되므로 제 3 자가 도청하는 것을 방지하는 완전한 방법이 없으며, 둘째 차재용 이동무선전화기는 무선을 사용하고 있으므로 동일한 수신장치만 구비하면 언제든지 도청이 가능하여 이 역시 보안상 취약하다 하겠다.The conventional 'telephone' had the following security vulnerabilities. First, ordinary telephones usually go through a microwave relay network built in response to the high demand of telecommunications, so there is no perfect way to prevent third parties from eavesdropping. Eavesdropping can be done at any time with the same receiver, which is also vulnerable to security.

이에 본 고안은 '전화기'의 보안상취약함을 보완하기위해 '전화기'사용시 송수화기를 들면 최초 약 20-30초간 보안에 관한 주의문이 수화기를 통해 청취되고, 이후 송화자의 통화를 할 수 있게 구성한 것으로서 첨부회로도에 의거, 그 구조가 작용 효과를 설명하면 다음과 같다. 송수화기(도시치 않았음)에 의해 작동되는 훅 스위치(HS)의 노오말 클로즈드접점(1)(이하 'NC'접점이라 약칭한다)은 직류전원 B+에 접속되고, 노오말오픈접점(2)(이하 'NO'접점이라 약칭한다)는 음성메모리 IC(10)의 입력단에 직결되는 동시에 저항 R을 거쳐 릴레이(RY) 구동용 TR의 베이스에 접속되어 있다. 또 훅 스위치(HS)의 공통접점(3)은 타단이 접지된 콘덴서 C의 일단에 접속되어 있다. 릴레이(RY)는 구동용 TR의 콜렉터와 직류전원 B+사이에 접속되어 있고 TR의 에미터는 접지되어 있다.In order to compensate for the security weakness of the 'telephone', the present invention raises the handset when using the 'telephone' and listens to the security notice for about 20-30 seconds through the handset. According to the attached circuit diagram, the structure explains the effect of the operation as follows. The normal closed contact 1 (hereinafter abbreviated as 'NC' contact) of the hook switch (HS) operated by a handset (not shown) is connected to the DC power supply B +, and the normal open contact (2) ( The abbreviation “NO” contact hereinafter) is directly connected to the input terminal of the voice memory IC 10 and connected to the base of the relay RY driving TR via a resistor R. The common contact 3 of the hook switch HS is connected to one end of the capacitor C having the other end grounded. The relay RY is connected between the collector of the drive TR and the DC power supply B +, and the emitter of the TR is grounded.

음성메모리 IC의 전원공급단(4)는 직류전원 B+에 접속되어 있고, 접지단(5)는 접지되며, 음성출력단(6)은 릴레이(RY)의 노오말오픈접점에 접속되어 있다. 또 릴레이(RY)의 공통접점은 타단이 접지된 수화기(20)의 일단에 접속되며, 릴레이(RY)의 노오말클로즈드 접점은 유도코일 N1을 거쳐 전화신호 입력의 일 도선에 접속되어 있다. 전화신호 입력의 다른 일 도선은 유도코일 N2를 거쳐 접지되며, 미설명부호 N3은 유도코일 N1, N2와 함께 녹음방지회로를 구성하는 유도코일이다.The power supply terminal 4 of the audio memory IC is connected to the DC power supply B +, the ground terminal 5 is grounded, and the audio output terminal 6 is connected to the normal open contact of the relay RY. The common contact of the relay RY is connected to one end of the receiver 20 having the other end grounded, and the normal closed contact of the relay RY is connected to one lead of the telephone signal input via the induction coil N1. The other wire of the telephone signal input is grounded through the induction coil N2, and reference numeral N3 is an induction coil constituting the recording prevention circuit together with the induction coils N1 and N2.

또 릴레이(RY)에 병렬접속되어 있는 다이오드는 릴레이(RY)의 역전압흡수다이오드이다.The diode connected in parallel to the relay RY is a reverse voltage absorption diode of the relay RY.

이와같이 구성된 본 고안의 작용을 설명하면 아래와 같다. 전화를 사용하지 않을때에 훅스위치의(HS) 공통접점(3)은 직류전원 B+에 접속되어 있으므로 콘덴서 C는 충전되게 된다.Referring to the operation of the present invention configured as described above is as follows. When the telephone is not used, the common switch 3 of the hook switch (HS) is connected to the DC power supply B +, so that the capacitor C is charged.

그 다음 전화를 걸기 위해서 이거나 또는 받기 위해 송수화기를 들게 되면 훅스위치(HS)의 공통접점(3)은 'NC' 접점(1)에서 이탈되어 'NO'접점(2) 전환접속된다. 따라서 콘덴서 C는 방전을 시작하게 되므로 릴레이 구동용 TR은 베이스에 바이어스 전류가 공급되어 도통된다.Then, when the handset is picked up or picked up, the common contact 3 of the hook switch HS is separated from the 'NC' contact 1 and is switched to the 'NO' contact 2. Therefore, since the capacitor C starts to discharge, the relay driving TR is supplied with a bias current supplied to the base.

TR이 도통되면 릴레이(RY)역시 구동되고, 한편 음성메모리 IC(10)의 입력단(7)에도 콘덴서 C의 방전전류가 공급되어 음성메모리 IC(10)이 동작하게 되어 메모리되었던 주의문이 출력단(6)으로 출력케 된다.When TR is turned on, the relay RY is also driven, while the discharge current of the capacitor C is supplied to the input terminal 7 of the voice memory IC 10 so that the voice memory IC 10 is operated so that the memorized notice is output. 6).

이때 릴레이(RY)가 구동된 상태이므로 릴레이(RY)의 공통접점은 노오말클로즈드접점에서 노오말오픈접점에 전환접속 되어 있다. 따라서 음성메모리 IC(10)의 음성출력은 수화기에 전달되어진다. 이후 시간이 경과하여 콘덴서 C가 방전을 종료하게 되면 릴레이(RY) 구동용 TR은 바이어스전류가 소멸되어 부도통상태로 전환되고, 따라서 릴레이(RY)는 복귀구동 된다. 이때 릴레이(RY)의 공통접점은 노오말 클로즈드접점으로 복귀접속되어 수화기(20)이 통상의 전화기 회로로 구성되게 하고 통화를 이행하게 한다.At this time, since the relay RY is driven, the common contact of the relay RY is switched from the normal closed contact to the normal open contact. Therefore, the voice output of the voice memory IC 10 is transmitted to the receiver. After the time elapses, when the capacitor C finishes discharging, the relay RY driving TR is switched to the non-conducting state by dissipating the bias current, so that the relay RY is driven back. At this time, the common contact of the relay RY is connected back to the normal closed contact so that the handset 20 is composed of a normal telephone circuit and makes a call.

상술한 바와같이 본 고안은 '전화기' 사용시 통화전 보안에 관한 주의를 환기시키어 부주의로 인한 기밀의 누설을 방지할 수 있는 효과가 있는 것이다.As described above, the present invention has an effect of preventing the leakage of confidentiality due to carelessness by calling attention to security before using the phone.

Claims (1)

'전화기'(도시치 않았음)의 훅스위치(HS)의 공통접점(3)은 타단이 접지된 콘덴서 C의 일단에 접속되고 'NC'접지(1)은 직류전원 B+에 접속되며, 'NO'접점(2)는 음성메모리 IC(10) 입력단(7)과, 타단은 릴레이(RY) 구동용 TR의 베이스에 접속된 저항 R의 일단에 동시접속되고, 릴레이(RY)의 노오말 오픈접점은 음성메모리 IC(10)의 출력단(6)에 접속되고, 릴레이(RY)의 공통접점은 타단이 접지된 수화기(20)의 일단에 접속되어 구성되는 구조의 통화전 임의의 주의문이 청취되는 전화기회로.The common contact (3) of the hook switch (HS) of the 'telephone' (not shown) is connected to one end of the capacitor C having the other end grounded, and the 'NC' ground (1) is connected to the DC power supply B +. The contact point 2 is simultaneously connected to the input terminal 7 of the voice memory IC 10 and the other end of the resistor R connected to the base of the relay RY driving TR, and the normal open contact point of the relay RY. Is connected to the output terminal 6 of the voice memory IC 10, and the common contact of the relay RY is connected to one end of the handset 20 having the other end grounded. Telephone circuit.
KR2019850007236U 1985-06-15 1985-06-15 Telephone circuit for broadcasting an announcement before on-line KR910003756Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019850007236U KR910003756Y1 (en) 1985-06-15 1985-06-15 Telephone circuit for broadcasting an announcement before on-line

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Application Number Priority Date Filing Date Title
KR2019850007236U KR910003756Y1 (en) 1985-06-15 1985-06-15 Telephone circuit for broadcasting an announcement before on-line

Publications (2)

Publication Number Publication Date
KR870001322U KR870001322U (en) 1987-02-20
KR910003756Y1 true KR910003756Y1 (en) 1991-06-01

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KR2019850007236U KR910003756Y1 (en) 1985-06-15 1985-06-15 Telephone circuit for broadcasting an announcement before on-line

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KR870001322U (en) 1987-02-20

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