KR920003725A - Dial Signal Interface Circuit for Data Modulator and Dial-Up Modem - Google Patents

Dial Signal Interface Circuit for Data Modulator and Dial-Up Modem Download PDF

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Publication number
KR920003725A
KR920003725A KR1019900010284A KR900010284A KR920003725A KR 920003725 A KR920003725 A KR 920003725A KR 1019900010284 A KR1019900010284 A KR 1019900010284A KR 900010284 A KR900010284 A KR 900010284A KR 920003725 A KR920003725 A KR 920003725A
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KR
South Korea
Prior art keywords
terminal
signal
dial
output
connector
Prior art date
Application number
KR1019900010284A
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Korean (ko)
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KR920011066B1 (en
Inventor
정길동
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정용문
삼성전자 주식회사
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Priority to KR1019900010284A priority Critical patent/KR920011066B1/en
Publication of KR920003725A publication Critical patent/KR920003725A/en
Application granted granted Critical
Publication of KR920011066B1 publication Critical patent/KR920011066B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Communication Control (AREA)
  • Telephonic Communication Services (AREA)

Abstract

내용 없음.No content.

Description

데이터 변복조기와 다이얼-업 모뎀의 다이얼 신호 인터페이스회로Dial Signal Interface Circuit for Data Modulator and Dial-Up Modem

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명에 따른 다이얼신호 인터페이스회로.1 is a dial signal interface circuit according to the present invention.

제2도는 제1도의 부분동작 파형도.2 is a partial operation waveform diagram of FIG.

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

10,12 : 제1,2RS-232C 14 : 데이터 변복조기10,12: 1st, 2RS-232C 14: Data Modulator

16,20 : 라인리시버 18,26 : 라인드라이버16,20: line receiver 18,26: line driver

22,24 : 제1,2멀티플렉서 28 : 제어회로22,24: first and second multiplexer 28: control circuit

Claims (1)

데이터 변복조기와 다이널-업 모뎀의 다이얼 신호 인터페이스회로에 있어서, 데이터 터미널인 DTE와 다이얼-업 모뎀의 DCE에 각각 RS-232C로 접속되어진 제1,제2RS-232C 콘넥터(10,12)와, 상기 제1RS-232C콘넥터(10,12)사이에 라인 리시버(16)와, 라인 드라이버(18)를 통해 접속되어 DTE로부터 출력되는 RTS를 DCE의 RTS신호로 제공하고 입출력 데이터를 변복조 출력함과 동시에 신호 전환 제어신호를 출력하는 데이터 변복조기(14)와, 상기 제2RS-231C 콘넥터(12)의 CTS(M), DCD(M)단자와 상기 제1RS-232C 콘넥터(10)의 TXD(T)단자 및 제2RS-232C 콘넥터(12)의 RXD(M)단자에 접속되어 상기 각 단자로부터 출력되는 전송 레벨의 신호를 TTL레벨의 신호로 반전수신하는 라인 리시버(20)와, 제어신호 입력단자를 가지고 상기 라인리시버(20)의 출력단과 상기 데이터 변복조기(14)의 입력 단자사이에 접속되어 있으며, 상기 제어 신호 입력단자로 입력되는 송수신 제어신호에 의해 스위칭되어 상기 라인 리시버(20)의 출력을 상기 데이터 변복조기(14)로 제공하는제1멀티플렉서(22)와, 상기 데이터 변복조기(14)의 출력단자와 라인 리시버(20)의 출력단자에 제1 및 제2입력포트(1A-4A)(1B-4B)가 접속되어 있으며, 제어신호 입력단자로 입력되는 송수신 제어신호에 의해 상기 제1, 제2입력포트(1A-4A)(1B-4B)중 하나의 입력포트를 선택 출력하는 제2멀티플렉서(24)와, 상기 제2멀티플렉서(24)의 출력단자와 상기 제1RS-232C콘넥터(10)의 CTS(T), DCD(T)단자와 제2RS-232C 콘넥터(12)의 TXD(M)단자 및 제1RS-232C 콘넥터(10)의 RXD(T)단자에 접속되어 TTL레벨의 신호를 전송레벨의 신호로 변환하는 라인 드라이버(26)와, 상기 라인 리시버(20)의 DCD(M) 출력포트와 데이터 변복조기(14)의 신호 전환 제어신호 출력포트에 접속되어 데이터 캐리어 검출신호와 입력시 상기 제1,2멀티플렉서(22,24)의 제어신호 입력단자로 송수신 제어신호를 제공하는 제어회로(28)로 구성됨을 특징으로 하는 데이터 변복조와 다이얼-업 모뎀의 다이얼 신호 인터페이스회로.A dial signal interface circuit of a data modulation / demodulator and a dial-up modem, comprising: first and second RS-232C connectors (10, 12) connected to a DTE and a DCE of a dial-up modem, respectively, by RS-232C; The RTS output from the DTE is connected to the line receiver 16 and the line driver 18 between the first RS-232C connectors 10 and 12 as the RTS signal of the DCE, and the input / output data is modulated and output. A data modulator 14 for outputting a signal switching control signal, the CTS (M) and DCD (M) terminals of the second RS-231C connector 12 and the TXD (T) of the first RS-232C connector 10. A line receiver 20 connected to the terminal and the RXD (M) terminal of the second RS-232C connector 12 for inverting and receiving the transmission level signal outputted from the respective terminals into a TTL level signal, and a control signal input terminal. Between the output terminal of the line receiver 20 and the input terminal of the data modulator 14 A first multiplexer 22 which is switched by a transmission / reception control signal input to the control signal input terminal to provide an output of the line receiver 20 to the data modulator 14, and the data modulator (2). The first and second input ports 1A-4A (1B-4B) are connected to the output terminal 14 and the output terminal of the line receiver 20, and are controlled by the transmission / reception control signal input to the control signal input terminal. A second multiplexer 24 for selectively outputting one of the first and second input ports 1A-4A and 1B-4B, an output terminal of the second multiplexer 24, and the first RS-232C; TTL level by being connected to CTS (T), DCD (T) terminals of connector 10, TXD (M) terminal of second RS-232C connector 12 and RXD (T) terminal of first RS-232C connector 10 Signal conversion control of the line driver 26 for converting the signal of the signal into a transmission level signal, the DCD (M) output port of the line receiver 20, and the data modulator 14; And a control circuit 28 connected to a call output port and configured to provide transmission and reception control signals to the control signal input terminals of the first and second multiplexers 22 and 24 upon input of the data carrier detection signal. Dial signal interface circuit of dial-up modem. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900010284A 1990-07-07 1990-07-07 Interface circuit of dial signal KR920011066B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019900010284A KR920011066B1 (en) 1990-07-07 1990-07-07 Interface circuit of dial signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019900010284A KR920011066B1 (en) 1990-07-07 1990-07-07 Interface circuit of dial signal

Publications (2)

Publication Number Publication Date
KR920003725A true KR920003725A (en) 1992-02-29
KR920011066B1 KR920011066B1 (en) 1992-12-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900010284A KR920011066B1 (en) 1990-07-07 1990-07-07 Interface circuit of dial signal

Country Status (1)

Country Link
KR (1) KR920011066B1 (en)

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KR920011066B1 (en) 1992-12-26

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