KR950001543B1 - Dialing system - Google Patents

Abstract

The apparatus for displaying the redialling or memorized number in visual display includes a keypad (18) having a first illuminator lighting all number buttons with a first light colour and a second illuminator lighting the redialling buttons with a second light colour, and a CPU (10) controlling the illuminators. The CPU turns on the first light in case of the off-hook and the second light in case of the redialling. It turns off the second light after completing the redialling.

Description

Optical dial telephone and its redial transmission method

1 is a circuit diagram of a conventional optical dial telephone.

2 is a circuit diagram of an optical dial telephone according to the present invention.

* Explanation of symbols for main parts of the drawings

BD: Bridge Circuit SW: Hook Switch

10: central processing unit 11: speech circuit

12: adapter 15, 18: key pad portion

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical dial telephone, and more particularly, to an optical dial telephone and a redial transmission display method thereof for visually displaying a number dialed during redial or memory dialing.

The conventional optical dialing telephone is constructed as shown in FIG.

As can be seen in FIG. 1, the optical dial telephone includes a bridge circuit BD, a hook switch SW, a central processing unit 10, a key pad section 15, a speech circuit 11 and an adapter 12. It is composed of connections.

In the optical dial phone configured as described above, when the contact point c of the hook switch SW is connected to the contact point b and is off-hook, the central processing unit 10 controls the keypad 15 so that the light emitting diodes RL1 to ˜1 are connected. By emitting RL12, the user can easily dial in a dark place.

As described above, the optical dial telephone only illuminates the entire keypad when off-hook, and does not display a dialed state during redialing, so that the user has to check whether or not it is executed by hearing during redialing.

The present invention has been made in view of the above-described problems, and the user visually shows the state of redialing by illuminating the entire key pad part at the time of off-hook and separately illuminating the corresponding key of the redialed telephone number. An object of the present invention is to provide an optical dial telephone and a redial transmission indication method thereof.

In order to achieve the above object, the present invention includes first lighting means for illuminating the entire number buttons with light of a first color and second lighting means for illuminating the redial number button with light of a second color. The keypad 18 and the first lighting means to illuminate the entire number buttons with a first color of light at the time of off-hook and illuminate the number buttons to be redialed with a second color of light when redialing. And a central processing unit (10) for controlling the second lighting means to display the number buttons corresponding to the telephone numbers continuously redialed by extinguishing the light of the second color after the redialing is completed. Provides an optical dial telephone.

The present invention also provides a first step of illuminating the entire number button provided in the keypad portion with light of the first color when the device is off hooked, and redialing when redialing a telephone number dialed after the first step. Illuminating the second button corresponding to the telephone number with light of a second color, and when the redialing is completed, extinguishing the light of the second color to display the number button corresponding to the continuously redialed phone number. Redial transmission display method of an optical dial telephone comprising a.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of an optical dial telephone according to the present invention.

As can be seen in FIG. 2, the optical dial telephone has a bridge circuit BD, a hook switch SW, a central processing unit 10, a speech circuit 11, an adapter 12, and a key pad section 18. As shown in FIG. It is composed by connection.

The key pad unit 18 is provided with light emitting diodes RL1 to RL12 for illuminating each number key and light emitting diodes GL1 to GL12 for displaying keys of a number to be redialed upon redialing. The RL1 to RL12 and the light emitting diodes GL1 to GL12 emit different color light.

When the contact point c of the hook switch SW is connected to the contact point a and is off-hook, the central processing unit 10 recognizes that it is off-hook and applies a high level potential through the port Px to supply the transistor Q3. ) Is turned on to supply power from the adapter 12 to the keypad 8 side, thereby causing the light emitting diodes RL1 to RL12 of the keypad 18 to emit light.

At this time, the central processing unit 10 applies a low level potential through the ports P1 to P12 so that the light emitting diodes GL1 to GL12 do not emit light.

The central processing unit 10 detects a telephone number input to the keypad unit 18 through the ports R1 to R2 and the ports C1 to C4, and checks the voltage drop of the ports R1 to R3 to determine the telephone number. Confirm the number entry.

When the user presses the redial button 13, the central processing unit 10 sends the telephone number stored in the buffer to the telephone line side.

For example, if you dial the telephone number 675-1234 with the off hook and press the redial button (13) to redial, the tone or pulse is output to the telephone line to dial the telephone number 675-1234. Done.

At this time, the light emitting diodes GL1 to GL12 of the keypad 18 operate as follows.

In case of redialing the telephone number 675-1234, the light emitting diode GL6 illuminating the number button ＂6 의 of the keypad 18 is turned on and turned off when the phone number＂ 6 ＂is redialed, and then the number button. The light emitting diode GL7 illuminating '7' turns on and turns off when the phone number '7' is redialed.

Then, the light emitting diode GL5 illuminating the number button # 5 of the keypad 18 is turned on and turns off when the phone number # 5 is redialed, and the light emitting diode illuminating the number button # 1 '( GL1) turns on and turns off when the phone number '1' is redialed, and turns off when the light-emitting diode (GL2) illuminating the number button '2' turns on and turns off when the phone number '2' is redialed. The light emitting diode GL3 illuminating the button " 3 " is turned on and then off when the phone number " 3 "

Subsequently, the light emitting diode GL4 illuminating the numeric button # 4 'is turned on and then turned off when the telephone number' 4 'is redialed.

The keypad unit 18 indicates that the telephone numbers 675-1234 are redialed by operating in the above-described process.

As described above, since the light emitting colors of the light emitting diodes RL1 to RL12 and the light emitting diodes GL1 to GL12 of the keypad 18 are different, the number button illumination of the redialed telephone number is turned on and off. The user can visually check the status of the redialing operation.

Claims (2)

An optical dial telephone comprising: a keypad unit having first lighting means for illuminating the entire number buttons with light of a first color and second lighting means for illuminating the redialed number buttons with light of a second color; Redial is completed after controlling the first lighting means to illuminate the entire number buttons with the light of the first color in the off-hook, and illuminating the number buttons to be redialed with the light of the second color when redialing. And a central processing unit (10) for controlling said second lighting means to display a number button corresponding to a telephone number continuously redialed by extinguishing the light of the second color. In the optical dial telephone, the first step of illuminating the entire number button provided on the keypad part with the light of the first color when it is off hooked, and the redialing when redialing the telephone number dialed after performing the first step. A second button displaying a number button corresponding to a continuously redialed phone number by illuminating the number button corresponding to the desired phone number with light of a second color and then extinguishing the light of the second color when redialing is completed; Redial transmission display method of the optical dial telephone comprising a step.