KR950002598B1 - Cordless public telephone system - Google Patents

Abstract

In the wireless telephone, the method prevents no charge of answering service by using not to transmit DTMF when the send key pushed and a channel allocated and close service when the user uses the dial key not pushing the call begin key. The system consists of a transmitter/receiver (21), a call circuit block (22), a controller (23), a coin classifier (24), a coin repository (25), a cache box (26), a card reader (27), an alarm generator (28), a wireless block (29), a power supply (30), a display (31), a unit call free setting block (32), a DTMF generator (33), and a memory (35).

Description

Free usage prevention device and method for automatic answering service of wireless public telephone

1 is a block diagram of a conventional public telephone.

2 is a block diagram of a wireless public telephone according to the present invention.

3 is a flowchart of operation of the wireless public telephone shown in FIG.

* Explanation of symbols for main parts of the drawings

22: call circuit 23: control unit

24: coin selector 25: coin accumulator

26: safe 27: card reader

28: dial tone generating unit 29: wireless unit

30: keypad portion 31: display portion

32: unit rate setting part 33: DTMF generation part

35: storage unit 36: ringback tone detection unit

The present invention relates to a wireless public telephone, and more particularly, to an apparatus and method for free use of an automatic answering service of a wireless public telephone for preventing a free automatic answering service using a keypad.

A conventional public telephone will be described with reference to FIG. The conventional public telephone has a handset 1, a call circuit section 2, a control section 3, a coin sorting section 4, a coin storing section 5, a safe box 6, and a card reader as shown in FIG. The unit 7, the keypad unit 8, the display unit 9, the unit rate setting unit 10, and the power supply unit 11 are configured to be connected.

The public telephone configured as described above operates as follows. When the user off-hooks the handset 1, the display unit 9 displays the message " insertion " under the control of the control unit 3. At this time, the user selects the coin selector 4. When the coin is inserted or the card is inserted into the card reader unit 7, the amount of money input is displayed on the display unit 9, and the control unit 3 indicates that the amount of money input is equal to or greater than the unit rate set by the unit rate setting unit 10. (2) is connected to make the dialing state, after the user dials by using the keypad (8), if a certain time elapses from the switching center during the call, the charging signal is received, and the control unit (3) If detected, the unit amount set by the basic unit rate setting unit 10 is stored from the coin accumulator 5 to the safe 6 and if the coin tracked in the coin accumulator 5 is less than or equal to the basic unit rate, the call circuit unit ( 2) Do not let the call C. When the user makes an on-hook after completing a call, the control unit 3 erases the message displayed on the display unit 9 and returns the remaining amount to the coin storage unit 5 or the balance of the card in the card reader unit 7. Returns.

As described above, in the conventional public telephone, when the user presses the send key after dialing and presses the start commute key, the user can talk with the other party. The billing starts from the time the press the call start key is pressed. You can receive auto answer service free of charge by pressing a key on the keypad with the handset mute off.

The present invention has been made in view of this point, and in the wired / wireless public telephone, press the cent key and if the cell site is assigned to the channel to suppress DTMF transmission and if the user presses the dial key on the keypad without pressing the call start key It is an object of the present invention to provide an apparatus and a method for preventing a wireless answering machine from receiving an automatic answering service by forcing it to be considered as receiving a free answering service free of charge.

In order to achieve the above object, the present invention provides a coin selector (24) for judging whether or not a coin is a pearl coin and outputting information thereof to the control unit (23). A coin storing unit 25 which sends coins to the safe box 26 under the control of the control unit 23, and reads out the telephone bill card and outputs information on the coin to the control unit 23 side. Outputs the received voice signal from the radio unit 29 to the receiver side of the handset 21 under the control of the reader unit 27, the radio site 29 communicating with the cell site side, and the control unit 23. And a call circuit section 22 for outputting a transmission sound signal from the talk section of the handset 21 to the radio section 29, a dial tone generator section 28 for generating a dial tone to the call circuit section 22, and the control unit ( 23) connected to dialing key, sen Keypad unit 30 having a key, call termination key, call start key and redial key, ringback tone detection unit 36 connected to the control unit 23 detects the ringback tone of the telephone line and outputs it to the call circuit unit 22 ), The unit rate setting unit 32 for setting the basic unit call rate under the control of the control unit 23, the DTMF generating unit 33 for generating the dialed number in DTMF tones, and the control of the control unit 23. A display unit 31 displaying information on a call state and a call rate, a storage unit 35 storing unit call charges, and information necessary for the operation of the control unit 23, and supplying operating power to each circuit unit. Provides a free use of the automatic answering service of the wireless public telephone, characterized in that the power supply unit 34 is provided.

In addition, the present invention is a method for preventing the automatic use of the automatic answering service of the wireless public telephone, the first step in which the message 'insert' is displayed on the display unit 3l when the handset 21 is off-hook, the user inserts a coin or card In the second step of determining whether the inserted amount is more than the basic call rate, and if the inserted amount is more than the base call rate, the display unit 31 displays the message "Press the Cent key after dialing", and cancels the reception mute to make a dial tone. In the third step of dialing and stopping the dial tone when the first digit is dialed, and pressing the cent key after dialing, the wireless unit 29 transmits the telephone number to the cell site and checks the radio channel assignment and sensitivity to determine if the cell is abnormal. In step 4, if the cell site is busy, redialing is performed using the redial key. If the cell site is not busy, the display unit 31 outputs the site busy signal. Step 5 to display the message "Press the call start key when answering the other party" and suppress DTMF tone generation. If the cell site is not busy, check if the telephone line is busy and if there is no ringback tone detected, the other party answers. If the ringback tone is detected, the redialing key is used and the sixth step of redialing, when the user presses the call start key, the control unit 23 charges the set amount of the unit rate setting unit 32 and transmits the mute. The seventh step of releasing the call, when the basic call time has elapsed, is charged by the unit call rate, and the entered amount is under the basic unit call rate by the eighth step of forced on-hook. (22) mute the transmission and reception paths, and the wireless unit 29 transmits a termination command to the cell site, clears the display unit 31, and returns the balance. Step 9, after answering the other party, if it is determined that there is an input of the dial key without pressing the call start key, the answering machine of the wireless public telephone includes muting the transmission path and forcibly on hook. Provides a free service prevention method.

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

2 is a configuration diagram of a wireless public telephone according to the present invention, and FIG. 3 is a flowchart illustrating an operation of a wireless public telephone for explaining a method for preventing free use of an automatic answering service of the wireless public telephone shown in FIG.

As shown in FIG. 2, the wireless public telephone of the present invention has a ring back tone returning to the handset 21, a call circuit section 22, a call tone generator 28 for generating a dial tone to the call circuit section 22, and a telephone line. A keypad having a ring back tone detection unit 36 for detecting, a DTMF generator 33 for generating a dialed number as a DTMF tone, a dialing key, a send key, a call termination key, a call start key, and a redial key. A unit 30, a display unit 31 for displaying information about the dialed number, call status and call rate, a unit rate setting unit 32 for setting a basic unit call rate, and a storage unit 35 for storing various kinds of information. In the sign language, the coin selection unit 24 for distinguishing whether it is a pearl flower or a causalism, a coin storage unit 25 for accumulating coins selected by pearls, and a safe deposit box 26 for storing coins in the coin storage unit 25 , The card reader unit 27 for reading the amount of the card when the user uses the card, each part A control unit 23 for controlling the control unit, a wireless unit 29 for communicating data and information with the cell site, and a power supply unit 34 for supplying power required for each part.

The call circuit unit 22 outputs the voice signal supplied from the handset 21 to the radio unit 29 and the received voice signal supplied from the radio unit 29 to the handset 21. The coin selecting unit 24 sends the coin to the coin storage unit 25 if the coin is a pearl coin and returns the coin if it is a coin coin. The unit rate setting unit 32 calculates the head call rate at the unit call time, and the automatic answering service unit 35 includes a dialing key, a send key, a call ending key, a call start key, and a redial key. . The display unit 31 displays information on the call state and the call rate under the control of the control unit 23, and the storage unit 35 stores the unit call time, the unit call rate for the unit call time, and various necessary information. . The radio unit 29 transmits and receives an RF (radio frequency) signal with the cell site side, and the power supply unit 34 supplies operation power to each circuit unit side.

The call circuit unit 22 is configured to be connected to a transmission muting unit, a transmission amplification unit, a reception muting unit, a ringback tone detection unit, and a holding sound generator. The transmission muting unit mutes the transmission sound signal output from the transmitter of the handset 21 to the transmission amplifier side under the control of the control unit 23. The transmission amplifier unit is supplied from the transmitter of the handset 21 through the transmission mute unit and transmitted. The audio signal is amplified and output to the radio unit 29 side. The receiving mute mutes the received voice signal supplied from the wireless unit 29 under the control of the controller 23, and the receiving amplifier amplifies the received voice signal supplied from the wireless unit 29 through the receiving mute unit. ) To the receiver side. The ringback tone detection unit 36 detects the ringback tone supplied from the radio unit 29 and reports the ringback tone to the control unit 23. The holding tone generating unit outputs the holding tone to the receiver unit of the handset 21 during the radio channel allocation time. .

A method of preventing free use of the automatic answering service of the wireless public telephone shown in FIG. When the user off-hooks the talker 2l, the power from the power supply unit 34 supplies each circuit unit and displays the message " Turn on " on the display unit 31. At this time, the user selects the coin on the coin selector 24. Injecting or inserting the card into the card reader unit 27, the coin selector 24 selects the pearl flower, the coin flower to return the coin flower and accumulate the pearl flower in the coin storage unit 25. The control unit 23 displays a message " press the send key after dialing " on the display unit 31 when the amount of the inserted coin or the amount of the card is equal to or greater than the basic currency rate, and continues to display the reception sensitivity of the radio unit 29. .

The reception mute unit (not shown) in the call circuit unit 22 is controlled to release the mute state, thereby making it possible to generate a holding sound.

When a dial tone is generated in the dial tone generator 28, it is received through the call circuit 22 to the receiver and the transmission path is muted.

When the user presses the first digit during dialing, the dial tone stops, and the DTMF generator 33 transmits the tone signal to the wireless unit 29 through the call circuit unit 22 and displays the dialed number on the display unit 31. Have them verify their numbers.

When the user presses the send key after dialing, the wireless unit 29 sends the phone number to the cell site. If the wireless channel allocation and sensitivity are checked, the wireless unit 29 outputs the cell site busy signal to the control unit 23 and the cell site is busy. The user redials using the redial button of the keypad unit 30. If the cell site is not busy, the display unit displays the message " press the call start button when answering the other party " and suppresses the DTMF tone generation of the DTMF generator 33 so that the tone is not transmitted to the wireless unit 29. If the cell site is not busy, the cell site is dialed to the wired switch office and the user checks whether the telephone line is busy with the handset 21. At this time, the ring back tone detector 36 detects the ring back tone and detects the ring back tone. If not, the other party is considered responding. If the ringback tone does not stop or is busy, the user can redial by using the redial button.

If the ringback tone is not detected, the control unit 23 senses the keypad unit 30, and when the dial key is input, the controller 23 regards the auto-response service as being in the transmission mute state. After this stops, if the user does not press the call start button after a predetermined time, the user is forced to hook on. When the user uses the call start button, the phone is in a normal operation state, and the control unit 23 charges the set amount of the unit rate setting unit 32 and enters the rate settlement.

In addition, the call circuit unit 22 releases the transmission mute of the handset 21 and allows the other party to talk. The controller 23 stores the coins of the coin accumulator 25 into the safe 26 by the unit currency rate when the basic unit currency time has elapsed by using the timer itself. If the user on-hook the handset 21 after completion of the call, the transmission / reception path of the call circuit unit 22 is muted, the wireless unit 29 transmits an end (END) command to the cell site, and the display unit 31 is cleared. Coins accumulated in the coin accumulator 25 are returned, and the amount of money read out from the card reader 27 is reduced when the card is used.

After answering the other party's response, it is determined whether there is no call start key, and if there is no call start key input, it monitors whether there is a dial key input and schedules the call with no dial key input or without dial key input. When the time elapses, the transmission / reception path of the call circuit unit 22 is muted, the wireless unit 29 transmits a termination command to the cell site, and the display unit 31 is cleared and returns the balance.

As described above, when using a wireless public telephone, when a user presses a send key after dialing, the cell site is connected to the other party's telephone line, and the user starts a call with the other party by pressing a call start key. The sender of the handset is muted so that the voice of the caller cannot be transmitted, and the receiver receives the automatic answering service by confirming the voice of the other party and presses the dial key of the keypad unit 30. When assigned, it prevents DTMF from being sent and if the user uses the dial key on the keypad without pressing the call start button, the user is forced to hook in order to prevent receiving a free automatic answering service from the wireless public telephone.

Claims (2)

In the wireless aerial liner, a coin sorting unit (24) for discriminating whether or not the coin put therein is a pearl coin and outputting information thereof to the control unit (23), accumulating coins from the coin sorting unit (24), and storing the coin. Under the control of (23), the coin storage unit 25 which sends coins to the safe box 26 side, the card reader unit 27 which reads out the telephone bill card and outputs the information thereof to the control unit 23 side, and the cell site side. And the wireless unit 29 communicating with the wireless channel through the wireless channel, and outputs the received voice signal from the wireless unit 29 to the receiver unit of the handset 21 under the control of the controller 23, and from the talker unit of the handset 21. A call circuit section 22 for outputting a transmission voice signal to the radio section 29, a call tone generator section 28 for generating a dial tone to the call circuit section 22, and a control unit 23, dialing keys, send Key, end call key, attendance key and redial key The keypad unit 30, the ring unit connected to the control unit 23 detects the ring back tone of the telephone line and outputs to the call circuit unit 22, the basic unit under the control of the control unit 23 A unit rate setting unit 32 for setting a call rate, a DTMF generation unit 33 for generating a dialed number in DTMF tones, and a display unit for displaying information on a call state and call rate under the control of the controller 23 (31), a storage unit (35) for storing unit call charges and information necessary for the operation of the control unit (23), and a power supply unit (34) for supplying operating power to each of the circuit units. Free answering device for telephone answering service. In the method for preventing free use of the automatic answering service of the wireless public telephone, the first step in which the message “insertion” is displayed on the display unit 31 when the handset 21 is off-hook, and the amount of money inserted when the user inserts a coin or a card In the second step of judging whether the basic call rate is greater than or equal to the basic call rate, if the inserted amount is equal to or greater than the basic call rate, the display unit 31 displays the message " press the cent key after dialing " In the third step of stopping the dial tone when dialing and displaying the dial number, pressing the cent key after dialing, the wireless unit 29 sends the phone number to the cell site and checks the radio channel allocation and sensitivity to control the cell site busy signal. In step 4, if the cell site is busy, redialing is performed using the redialing key. If the cell site is not busy, the display unit 31 sends " Press the start button "and the 5th step of suppressing DTMF tone generation, if the cell site is not busy, check whether the telephone line is busy or not, and if there is no ringback tone detected, the other party considers to respond and ringback tone If the detection is detected using the redial button and redialing step 6, there is a counterpart response, when the user presses the call start key, the control unit 23 charges the set amount of the unit rate setting unit 32 and releases the transmission mute. Step 7, when the basic call time has elapsed, is charged by the unit currency rate, and the inputted amount is below the basic unit call rate when the eighth step is forcibly on-hook; when the handset is on-hook after the completion of the call, the call circuit unit 22 The ninth step of muting the transmission and reception paths, the wireless unit 29 transmits a termination command to the cell site, clears the display unit 31, and returns the balance. After answering, if it is determined that there is an input of the dial key without pressing the call start key, the automatic answering service of the wireless public telephone is prevented. Way.