KR930005414A - General telephone / key phone telephone automatic selection circuit - Google Patents

General telephone / key phone telephone automatic selection circuit Download PDF

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Publication number
KR930005414A
KR930005414A KR1019910014929A KR910014929A KR930005414A KR 930005414 A KR930005414 A KR 930005414A KR 1019910014929 A KR1019910014929 A KR 1019910014929A KR 910014929 A KR910014929 A KR 910014929A KR 930005414 A KR930005414 A KR 930005414A
Authority
KR
South Korea
Prior art keywords
telephone
key phone
general
automatic selection
general telephone
Prior art date
Application number
KR1019910014929A
Other languages
Korean (ko)
Other versions
KR970004822B1 (en
Inventor
박상률
Original Assignee
정몽헌
현대전자산업 주식회사
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 정몽헌, 현대전자산업 주식회사 filed Critical 정몽헌
Priority to KR1019910014929A priority Critical patent/KR970004822B1/en
Publication of KR930005414A publication Critical patent/KR930005414A/en
Application granted granted Critical
Publication of KR970004822B1 publication Critical patent/KR970004822B1/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
    • H04M1/26—Devices for calling a subscriber

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

Abstract

내용 없음.No content.

Description

일반전화기/키폰전화기 자동선택회로General telephone / key phone telephone automatic selection circuit

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

제1도는 본 발명에 의한 일반전화기/키폰전화기 자동선택회로의 구성도.1 is a block diagram of a automatic telephone / telephone telephone automatic selection circuit according to the present invention.

Claims (1)

일반전화기 및 키폰전화기의 구분없이 연결하여 사용할수 있는 키폰 시스템의 일반전화기/키폰전화기 자동 선택회로에 있어서, 상기 키폰시스템에 연결되어 상기 일반전화기가 상기 키폰시스템에 연결되면 피딩 전류를 발생시키는 일반전화기 피딩수단(1), 상기 일반전화기 피딩수단(1)에 연결되어 상기 피딩전류가 발생되면 동작하는 포토커플러수단(U1), 상기 일반전화기 피딩수단(1)과 병렬로 키폰시스템에 일측이 연결되고 타측은 마이크로 프로세서에 연결되어 음성전달의 기능을 수행하는 제1트랜스포머(T1), 상기 일반전화기 피딩수단(1)과 키폰전화기 접속단자(DT)에 일측이 연결되고 상기 마이크로 프로세서의 데이타 출력단(B)과 전원에 타측이 연결되어 마이크로 프로세서로 부터의 데이타를 전달하는 제2트랜스포머(T3) 및 상기 키폰전화기 접속단자(DR)와 접지에 일측이 연결되고 상기 포트커플러 수단(U1)의 출력단인 수광소자와 접지에 타측이 연결되어 키폰 시스템으로 부터의 데이타를 전달하는 제3트랜스포머(T2)로 구성되는 것을 특징으로 하는 일반전화기/키픈전화기의 자동선택회로.A general telephone / keyphone telephone automatic selection circuit of a key phone system that can be used in connection with a general telephone and a key phone telephone, wherein the general telephone is connected to the key phone system and generates a feeding current when the telephone is connected to the key phone system. One side is connected to the key phone system in parallel with the feeding means (1), the photocoupler means (U1) which is connected to the general telephone feeding means (1) and operates when the feeding current is generated. The other side is connected to a microprocessor, the first transformer (T1) to perform the function of voice transmission, the general telephone feeding means (1) and the key phone telephone connection terminal (DT) one side is connected to the data output terminal (B) of the microprocessor And a second transformer (T3) for transmitting data from a microprocessor, the other side of which is connected to the One end is connected to the terminal DR and the ground, and the light receiving element, which is an output terminal of the port coupler means U1, and the other side is connected to the ground, and the third transformer T2 transfers data from the keyphone system. Automatic selection circuits for general telephones and open telephones. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910014929A 1991-08-28 1991-08-28 Auto-selecting circuit of a telephone KR970004822B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910014929A KR970004822B1 (en) 1991-08-28 1991-08-28 Auto-selecting circuit of a telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910014929A KR970004822B1 (en) 1991-08-28 1991-08-28 Auto-selecting circuit of a telephone

Publications (2)

Publication Number Publication Date
KR930005414A true KR930005414A (en) 1993-03-23
KR970004822B1 KR970004822B1 (en) 1997-04-04

Family

ID=19319238

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910014929A KR970004822B1 (en) 1991-08-28 1991-08-28 Auto-selecting circuit of a telephone

Country Status (1)

Country Link
KR (1) KR970004822B1 (en)

Also Published As

Publication number Publication date
KR970004822B1 (en) 1997-04-04

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