KR940009776B1 - On-hook dialing system for card-payphone - Google Patents

Abstract

The apparatus provides an on-hook function for a inserting card without another on-hook dial button. The apparatus comprises: a control unit (20) controlling a card public telephone, a line sensing control unit (10) sensing the line (1) and controlling on/off-hook status and current, a card detecting unit (22) reading from and wrinting into the card, a displaying unit (29) confirming fee & operating status, a dial tone generating unit (31) generating the dial tone outside, an amplifiying unit (32) amplifying the dial tone signal.

Description

On-hook dial method and apparatus of card payphone

1 is a flow chart of a conventional control operation.

2 is a circuit block diagram of the present invention.

3 is a flowchart of a control operation of the present invention.

* Explanation of symbols for main parts of the drawings

10: line detection control unit 20: control unit

22: card detection unit 23: dial unit

25: handset 27: balance counting unit

29: display unit 31: dial tone generating unit

32: amplifier 33: speaker

The present invention relates to an on-hook dial method and apparatus for a telephone, and more particularly, to an on-hook dial method and apparatus for a public telephone using a plastic telephone card.

The conventional card type payphone is composed of a control unit for total control of the telephone, a line detection control unit, a balance counting unit, and a card detection unit, and after detecting off-hook in the line detection control unit as shown in FIG. Compare the card balance read in to display the balance and determine whether to call.

When the call state, the line detection control unit connects the line.

At this time, the dial tone is transmitted by receiving the dial and the call is started in the handset, where the balance count unit counts the amount of the call function to determine whether to continue the call.

The conventional card-type public telephones are inconvenient when a user wants to use a telephone while carrying a heavy load.

That is, the heavy luggage can be put down and the handset must be inserted before the card can be inserted into the on-hook state so that a telephone call can be made.

However, at this time, if the other party is busy, it has to be restarted from the beginning.

Accordingly, the present invention has been made to improve the above-mentioned conventional inconveniences, and an object of the present invention is to perform an on-hook function simultaneously with card insertion without using a separate on-hook dial button in a card type public telephone. To provide a method and apparatus for on-hook dialing of a card-type public telephone, which is convenient to use.

Preferred embodiments for achieving the object of the present invention described above in detail by the accompanying drawings as follows.

2 is a circuit block diagram of the present invention, in which a line sensing controller 10 for detecting a line on a line 1 to control an on-hook or off-hook state and a current of a circuit is connected. The line sensing controller 10 is connected to a controller 20 that controls the overall functions of the phone.

The control unit 20 is connected to a card detecting unit 22 for reading and rewriting a telephone card, and a dial unit 23 composed of various function buttons and dial buttons, and having a speech circuit capable of handwriting. The handset 25 is connected to a balance counting unit 27 that calculates a fee according to a call, and a display unit 29 for allowing a user to visually check the rate and various operation states.

A dial tone generator 31 is connected to a common contact between the line sensing controller 10 and the handset 25 so as to externally generate a dial tone so that the dial tone can be heard. The dial tone generator 31 ) Is also connected to the control unit 20. The dial tone generator 31 is connected to the speaker 33 through an amplifier 323 which amplifies the dial tone signal to a predetermined level.

Referring to the control operation flow chart of FIG. 3 in the above configuration, their operation and effect will be described.

When the user who wants to use the public telephone inserts the telephone card into the card-type public telephone, the telephone is started 101 by the control operation of the control unit 20 and the card detecting unit 22 detects the card 102.

The controller 20 is a CPU to which a predetermined program is input, and processes and analyzes a signal input from the dial 23 to control the operation of the dial tone generator 31 to generate a desired dial tone. .

In addition, the card full amount is displayed on the display unit 29.

As a result of the card detection determination 102, if there is no remaining balance in the card, the operation fails and ends 108, and a display of no remaining balance is displayed on the display unit 29.

As a result of the card detection determination 102, if the remaining amount of money remains on the card, the line detection controller 101 connects the line 1 by occupying 103.

At this time, the dial tone is transmitted to the outside through the speaker 33 after being amplified to a predetermined level in order to send the dial tone to the outside.

This will signal a signal that the call is available and wait for the dial 104.

At this time, the user dials 104 through the dial 23 and the call 105 is made through the handset 25.

The call is off-hook.

As the user continues the public telephone call, the balance count unit 27 continues the count 106 for calculating the charge.

If the result of the count 106 is insufficient, the telephone operation is terminated (107). If the balance remains, the call 105 continues.

As described above, the present invention adds an on-hook dial function to a card-type public telephone like a general telephone, so that dialing is possible without lifting the handset of the public telephone, and the card is simply aired without an on-hook dial button. By inserting into the phone automatically enters the dial mode has the effect of making the card-type public telephone more convenient.

In particular, when the user wants to make a call in a card-type public telephone box with a heavy object, it may feel more convenient.

Claims (2)

A control unit 20 for controlling a card-type public telephone, a line detection control unit 10 for detecting the on / off-hook state and a circuit current by detecting the line 1, and a card detection unit for reading and writing a card ( 22) and the dial 23, the handset 25 and the balance card unit 27 for calculating the call charges, the display unit 29 for checking the charges and the operation state, and the dial tone to the outside. A dial tone generator 31 for allowing a user to listen, an amplifier 32 for amplifying the dial tone signal at a predetermined level, and a speaker 33 are configured so that only the card is automatically inserted into the dial mode. An on-hook dial device of a card payphone. When the operation of the card-type public telephone starts (101), the first step of detecting (102) the card and occupying the line (103) or ending the operation (107) according to the presence of the balance; A second step of counting 106 the balance remaining on the card after the tone is sent out, dialing 104 and making a call 105; and a third step of continuing or ending the call according to the balance count result. On-hook dialing method of the card-type public telephone, characterized in that the automatic execution of the dial mode only by inserting the card sequentially.