KR940005026A

KR940005026A - Long distance control system of telephone

Info

Publication number: KR940005026A
Application number: KR1019920014415A
Authority: KR
Inventors: 최광주
Original assignee: 이용규; 나우정밀 주식회사
Priority date: 1992-08-11
Filing date: 1992-08-11
Publication date: 1994-03-16
Also published as: KR950007979B1

Abstract

본 발명은 전화기의 장거리전화 제어 시스템에 관한 것으로서, 이는 0번을 누르는 시점이 첫번째 또는 두번째 이후의 다이얼링인지를 감지하여 장거리전화 통화를 방지하도록 하는 것이다.The present invention relates to a long-distance control system of a telephone, which detects whether the time of pressing zero is the first or second dialing to prevent long-distance calls.

이와같은 본 발명은 송수화기를 들었을시 다이얼톤을 발생하고 음성을 제어하여 수화기 및 전화회선으로 송출하는 스피츠네트워크회로와, 그 스피츠네트워크회로에서 발생된 다이얼톤을 검출하는 다이얼톤 검출회로와, 다이얼링신호중에서 0번의 다이얼링신호를 검출하는 다이얼링 검출회로와, 그 다이얼링 검출회로 및 다이얼톤 검출회로의 출력을 앤드화하는 앤드게이트와, 그 앤드게이트의 출력신호에 따라 동작하여 잔화회선을 차단하는 장거리전화 제어회로로 구성함으로써 달성되는 것이다.As described above, the present invention provides a spitz network circuit for generating a dial tone when a handset is heard and controlling voice to be transmitted to the handset and a telephone line, a dial tone detection circuit for detecting a dial tone generated at the spitz network circuit, and a dialing signal. A dialing detection circuit for detecting a zero dialing signal, an AND gate for ANDing the outputs of the dialing detection circuit and the dial tone detection circuit, and a long-distance telephone control operating in accordance with the output signal of the AND gate to block the residual line This is achieved by constructing a circuit.

Description

Long distance control system of telephone

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

첨부한 도면은 본 발명 전화기의 장거리전화 제어 시스템 구성도이다.The accompanying drawings are long-range telephone control system configuration of the telephone of the present invention.

Claims

A spitz network circuit having an interface circuit 1 having a hook switch combining a telephone line and a telephone system, and a dial tone generating unit for generating a dial tone when the handset is picked up and controlling a voice signal to be sent to the handset and the telephone line. 3) and a dial tone detection circuit 7 for detecting a dial tone generated in the spitz network circuit 3, and a zero dialing signal in the dialing signals through the keyboard 5 and the dialy circuit 4; An AND gate 8 for ANDing and outputting a dialing detection circuit 6, an output signal of the dialing detection circuit 6, and an output signal of the dial tone detection circuit 7, and an output of the AND gate 8. A long-distance telephone control system for a telephone, comprising a long-distance telephone control circuit (9) for driving in response to a signal to control an interface circuit (1) to cut off a telephone line.

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