KR960036475A - Telephone with telephone number search and autodial function and its operation method - Google Patents

Abstract

The present invention relates to a telephone having a telephone number search and an automatic dial function and a method of operating the same, comprising: a key scanning circuit for detecting a button press of a key phone user; A liquid crystal display for visually identifying and selecting stored telephone numbers; A DTMF signal generation circuit for transmitting the telephone number selected through the liquid crystal display toward the trunk line; A first step of configuring a telephone to include a central processing unit for controlling the key scanning circuit, a liquid crystal display, and a DTMF signal generating circuit, and when a key phone user presses a search button, the central processing unit detects the same through a key scanning circuit; A second step of displaying the telephone numbers stored in the internal memory one by one on the liquid crystal display of the keypad telephone; A third step of pressing the play button if the telephone number displayed on the liquid crystal display matches the number to be searched, and pressing the search button of the first step again if it does not match; When the central processing unit detects that the transmission button is pressed, the telephone number is changed through the DTMF signal generating circuit into the DTMF signal, and then operated through the fourth step of transmitting the signal to the trunk line through the asserted value. In addition to the 'last number re-dial' feature common to all previous phone numbers, previous phone numbers can also be searched, verified, and re-dialed, eliminating the need to find or dial a phone number again. This saves time and allows the user to conveniently extend the redial feature, resulting in a highly reliable phone that can improve product performance.

Description

Telephone with telephone number search and autodial function and its operation method

As this is a public information case, the full text was not included.

1 is a schematic diagram showing the overall configuration of a key-phone telephone according to the present invention, and FIG. 2 is a flowchart showing the driving principle of the key-phone telephone according to the present invention.

Claims (2)

A key scan circuit for detecting a button press of a key phone user; A liquid crystal display for visually identifying and selecting stored telephone numbers; A DTMF signal generation circuit for transmitting the selected telephone number to the trunk line through the liquid crystal display; And a central processing unit for controlling the key scanning circuit, the liquid crystal display, and the DTMF signal generating circuit. A first step of detecting, by a key scanning circuit, the central processing unit when the key phone user presses a search button; A second step of displaying the telephone number stored in the internal memory on the liquid crystal display of the keypad telephone; If the phone number displayed on the LCD display matches the number to be searched, press the play button, press the search button of the first step again when not working, and press the search button of the first step again if it does not match. Step 3; When the press button is detected by the central choreography device, a fourth step of converting the telephone number signal into the DTMF signal through the DTMF signal generating circuit and transferring the signal to the trunk line through the asserted value. And a telephone operating method having an auto dial function. ※ Note: The disclosure is based on the initial application.