KR940017492A

KR940017492A - Called Display Circuit of Simple Switching Device

Info

Publication number: KR940017492A
Application number: KR1019920026985A
Authority: KR
Inventors: 강중옥
Original assignee: 백중영; 금성통신 주식회사
Priority date: 1992-12-30
Filing date: 1992-12-30
Publication date: 1994-07-26

Abstract

키폰 시스템의 내선 가입자가 외부에서 키폰 시스템에 전화를 걸어 현재 행선지의 전화번호를 입력하는 기능을 부여하므로써 키폰 시스템 내부의 다른 내선 가입자가 부재중인 키폰 전화기를 호출했을 경우 부재중인 키폰전화기 사용자의 행선지 전화번호를 LCD를 통해 알 수 있게 하므로서 긴급 상황인 경우 연락이 가능하게 하는 효과가 있음.The destination telephone of an absent keyphone telephone user when another extension subscriber in the keyphone system calls an absent keyphone telephone by allowing the extension subscriber of the keyphone system to call the keyphone system from outside and enter the phone number of the current destination. The number is displayed on the LCD, which makes it possible to contact you in an emergency.

국선 접속을 위한 〈국선접속회로〉와 국선으로부터의 링신호를 감지하는 〈링 감지신호〉, 외부로부터의 DTMF신호를 디지탈 신호로 변환하는 〈DTMDF RECEIVER회로〉, 〈DTMF 레시버 회로〉로부터의 digital Data를 저장하기 위한 메모리 외부의 내선 가입자에게 톤을 공급하기 위한 〈톤 발생 회로〉, 〈국선 접속회로〉와 〈톤 발생회로〉〈DTMF Signa 레시버〉를 연결하기 위한 〈matrix〉회로로 구성되어 있다.Digital circuits from the trunk line connection circuit for ring line connection, the ring detection signal for ring signal from the trunk line, the DTMDF RECEIVER circuit and DTMF receiver circuit for converting DTMF signals from the outside into digital signals. It is composed of 〈tone generator circuit〉 for supplying tone to station subscribers outside memory for storing data, 〈matrix circuit】 for connecting 〈Cotline connection circuit〉 and 〈tone generator circuit〉〈DTMF Signa receiver〉 have.

Description

Called Display Circuit of Simple Switching Device

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

제1도는 본 발명의 구성도.1 is a block diagram of the present invention.

Claims

The destination telephone of an absent keyphone telephone user when another extension subscriber in the keyphone system calls an absent keyphone telephone by allowing the extension subscriber of the keyphone system to call the keyphone system from outside and enter the phone number of the current destination. Called display circuit of a simple switching device that allows the user to be informed in case of an emergency by making the number known on the LCD.

※ Note: The disclosure is based on the initial application.