KR880014775A - Transmission line control circuit according to communication status - Google Patents

Transmission line control circuit according to communication status Download PDF

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Publication number
KR880014775A
KR880014775A KR870004598A KR870004598A KR880014775A KR 880014775 A KR880014775 A KR 880014775A KR 870004598 A KR870004598 A KR 870004598A KR 870004598 A KR870004598 A KR 870004598A KR 880014775 A KR880014775 A KR 880014775A
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KR
South Korea
Prior art keywords
signal
outputting
microcomputer
transmission line
output
Prior art date
Application number
KR870004598A
Other languages
Korean (ko)
Inventor
최동원
Original Assignee
안시환
삼성전자 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 안시환, 삼성전자 주식회사 filed Critical 안시환
Priority to KR870004598A priority Critical patent/KR880014775A/en
Publication of KR880014775A publication Critical patent/KR880014775A/en

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Abstract

내용 없음No content

Description

통신상태에 따른 전송선로 조절회로Transmission line control circuit according to communication status

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

제1도는 본 발명에 따른 회로도, 제2도는 제1도의 흐름도.1 is a circuit diagram according to the present invention, and FIG. 2 is a flowchart of FIG.

Claims (1)

디지탈 데이터통신 제어신호와 통신데이터를 입출력하는 호스트컴퓨터(9)와, 상기 호스트컴퓨터(9)의 입출력데이터를 TTL레벨의 데이터로 전송하는 RS-232C 인터페이스부(RSIU)를 구비한 통신상태에 따른 전송선로 조절회로에 있어서, 전화라인으로부터 입력되어지는 링신호를 검출하여 출력하는 동시에 통화로 형성 제어신호에 의해 통화로를 형성하며 송수신 아나로그 신호의 임피던스를 매칭하는 라인인터페이스(LIU)와, 상기 검출된 링신호를 입력하여 통화로 형성 제어신호를 출력하는 동시에 내장된 프로그램에 의해 디지탈신호로 입력되는 수신신호의 상이점을 검출하여 모뎀전송라인 상태인지 음성전송라인 상태인지를 판단하여 시스템을 제어하는 마이컴(4)과, 상기 마이컴(4)의 제어에 의해 수신신호를 검출하는 동시에 입출력 신호를 변복조하여 상기 마이컴(4) 및 전화라인으로 출력하는 모뎀(5)과, 상기 마이컴(4)이 일반전화 전송모드라 판단시 출력하는 신호에 의해 음성신호를 전달하는 릴레이회로(10)와, 상기 릴레이(10)로부터 출력되는 신호와 RS-232C 인터페이스부(RSIU)에서 출력하는 호스트컴퓨터(9)의 출력신호를 상호 변환하여 출력하는 신호변환부(DATAC)로 구성함을 특징으로 하는 회로.According to a communication state provided with a host computer 9 for inputting / outputting digital data communication control signals and communication data, and an RS-232C interface unit (RSIU) for transmitting the input / output data of the host computer 9 as TTL level data. A transmission line control circuit, comprising: a line interface (LIU) for detecting and outputting a ring signal input from a telephone line and simultaneously forming a call path by a call path forming control signal and matching impedance of a transmission / reception analog signal, Controlling the system by inputting the detected ring signal and outputting a control signal to make a call, and detecting the difference between the received signal inputted as a digital signal by the built-in program and determining whether it is in a modem transmission line state or a voice transmission line state. The microcomputer 4 and the microcomputer 4 detect the received signal and simultaneously demodulate and demodulate the input / output signal. The modem 5 outputting to the microcomputer 4 and the telephone line, a relay circuit 10 for transmitting a voice signal by a signal outputted when the microcomputer 4 determines that it is a general telephone transmission mode, and the relay ( And a signal converter (DATAC) for converting and outputting the signal output from the host computer (9) output from the RS-232C interface (RSIU). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR870004598A 1987-05-11 1987-05-11 Transmission line control circuit according to communication status KR880014775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR870004598A KR880014775A (en) 1987-05-11 1987-05-11 Transmission line control circuit according to communication status

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR870004598A KR880014775A (en) 1987-05-11 1987-05-11 Transmission line control circuit according to communication status

Publications (1)

Publication Number Publication Date
KR880014775A true KR880014775A (en) 1988-12-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR870004598A KR880014775A (en) 1987-05-11 1987-05-11 Transmission line control circuit according to communication status

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KR (1) KR880014775A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100497989B1 (en) * 1997-03-21 2005-09-08 매그나칩 반도체 유한회사 Methodology for pull model invocation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100497989B1 (en) * 1997-03-21 2005-09-08 매그나칩 반도체 유한회사 Methodology for pull model invocation

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