KR19990025964A - Prank call prevention device and method - Google Patents

Abstract

The present invention relates to a telephone, and more particularly, to detect various states of a telephone so that a user can control a user by inputting a set password for an incoming signal of an incoming call from an external device in a telephone or a terminal having a built-in telephone function to automate home life. A microcomputer 100 for outputting a control signal; A second bridge circuit unit 300 for applying power to generate a ring signal; Receives the signal output from the switching unit 400 to match the DC characteristics between the tip and the ring to configure the call line of the talk, sign, side sound, and to adjust the set value of the voice signal transmitted and received by adjusting the signal strength A call circuit unit 500; A DTMF signal receiving unit 600 for receiving a signal output from the call circuit unit 500 and converting the number pressed by an external caller into a BCD code so that the microcomputer 100 can interpret the number; Receiving the signal output from the telephone bell generator 700 converts the ring signal incoming state to a high / low signal state, and outputs to the microcomputer 100 to detect the incoming call ringer 800 )Wow; It is characterized in that it comprises a voice synthesis circuit unit 1000 for receiving a control signal output from the microcomputer 100 and outputs a predetermined message, the present invention, even if the phone call from the outside, if the password is wrong The phone is automatically disconnected to prevent prank calls.

Description

Prank call prevention device and method

The present invention relates to a telephone, and in particular, to a phone or a terminal with a built-in telephone function in a home life, a prank call prevention device and method for allowing a user to control an incoming signal of an incoming call from an external device by inputting a set password It is about.

In general, the internal structure of a telephone is a ring signal for detecting a ring signal applied from a caller's end station (a basic device of a telephone) through a trunk line connection port 1 connected to an external trunk line and the trunk line connection port 1. Connection between the sensing unit 2, the ring signal generating unit 3 for outputting a ringing tone to the receiver based on the ring signal applied from the ring signal detecting unit 2, the counterpart terminal, The loop circuit 4 performing the interface function of overall communication signals input / output to the outside, the handset 5 used by the user for transmitting / receiving, and the user's nurturing the handset 5 The receiver unit 5a output through the receiver, the receiver unit 5b for listening to the voice from the other party, the hook switch 6 for controlling the network circuit 7, and the voice signal when the user transmits the predetermined level Amplified by side sound A network 7 for performing signal processing for Side Tone, a liquid crystal display 8 for informing a user of a current operating state of the telephone, a display driver 8a for driving a light emitting display 8b, and When the ring signal detected by the ring signal detection unit 2 detects the ring light on the primary light through the light emitting diode on the phone to notify the user that the call is coming to the light emitting display unit (8b) and the operation of the phone A memory 9 for storing necessary data, a microprocessor 10 for controlling the operation of the entire apparatus based on signals detected by the ring signal detecting unit 2 and the loop circuit 4, and a user dialing And a control key of the microprocessor 10 in response to a keypad 11 provided with a number and a function key used to select a specific function or a predetermined key input through the keypad 11. A DTMF generation circuit 12 for outputting a corresponding DTMF (Dual Tone Multi Frequency) signal, a voice data storage unit 13 for storing predetermined voice data as encoded digital code data for voice message automatic reception and response function, A coder decoder (CODEC) 14 which decodes the data stored in the voice data storage unit 13 to code a voice signal, and is output from the codec 14 under the control of the microprocessor 10. And a digital signal processing unit 15 for processing digital signals, and a CDP (Call Progress Tone) detecting circuit 16 for recognizing the termination of the call when the other party hangs up.

As is known, in the above configuration, when the ring signal detecting unit 2 detects a ring signal from the outside, it notifies the microprocessor 10, and the microprocessor 10 based on the ring signal generating unit ( 3) the ring signal is generated to the user by the control, and the lamp is turned on on the telephone through the liquid crystal display 8.

In addition, when the user outputs voice by picking up / receiving the receiver 5 for the purpose of the talk, the microprocessor 10 outputs a signal input through the network circuit 7 based on this, and the network circuit 7 ) Amplifies the input signal by a set value, and then the input signal is output to the outside through the loop circuit 4.

However, such a conventional telephone is difficult to determine whether the unspecified majority of the call is a prank call or a necessary call when the phone rings, unconditionally pick up the handset, and if the prank call is unspecified There was a problem that you do not receive an important call when you are uncomfortable and put down the handset.

The present invention is to solve the above conventional problems, in particular, when the terminal is set to the call function incoming control method, when the call is received from the outside, only the lamp does not ring and the lamp flashes, after the automatic telephone connection password When the caller sends out an input request voice and the caller enters the correct password, the user is notified of the incoming call status by bell (melody) to receive a call from a specific person who knows the incoming call control password. The present invention provides a device and method for preventing prank calls, which can prevent personal information in advance and protect personal privacy.

In order to achieve the above object, the present invention provides a prank call prevention device comprising: a microcomputer for detecting various states of a telephone (phone ringing state, DTMF reception data, handset state, etc.) and outputting a control signal according thereto; A first bridge circuit unit for connecting a telephone line of an input tip and a ring irrespective of polarity; A second bridge circuit unit which operates in the same manner as the first bridge circuit unit and applies power to generate a ring signal; A switching unit receiving the control signal of the microcomputer and turning on / off a signal output from the first bridge circuit unit; Call circuit unit for receiving a signal output from the switching unit to match the DC characteristics between the tip and the ring impedance to form a telephone line of the call, sign, and sidetone, and to adjust the set value of the voice signal transmitted and received by adjusting the signal strength Wow; A DTMF signal receiving unit which receives a signal output from the call circuit unit and converts the number pressed by an external caller into a BCD code so that the microcomputer can interpret the number pressed; A telephone ring generator configured to receive a power output from the second bridge circuit unit to ring a telephone ring; A telephone ring detector for receiving a signal output from the telephone ring generator and converting a state in which a bell signal is received to a high / low signal state and outputting the signal to the microcomputer to detect an incoming state of the telephone ring; A melody generator for receiving a control signal output from the microcomputer and generating a melody indicating a state of a telephone; A voice synthesis circuit unit for receiving a control signal output from the microcomputer and outputting a preset message; A transistor turned on / off by a signal output from the microcomputer; A relay connected to the melody generating unit and the telephone ring generating unit according to an on / off state of the transistor to output a signal generated by the melody generating unit and the telephone ring generating unit; Receiving a signal output from the relay is characterized in that it comprises a speaker for notifying the user that the call.

On the other hand, the prank call prevention method of the present invention includes a call control method determination step (S1) of determining whether the user has set the phone to the call control method; A call ringing decision step (S2) of terminating if the call control method is not received in the incoming call control method judging step (S1), and determining if a call ring signal is received; A call ring determination step (S3) of determining if the call ring does not ring at the call ringing determination step (S2), and determining if the call ring has been ringed a predetermined number of times; The telephone ring determination step (S3) is terminated if the telephone ring does not ring the set number of times, and if it is correct, turn on the switching unit under the control of the microcomputer automatically connects the telephone line to connect the telephone line with the caller automatically connected ( S4); A voice output step (S5) of reproducing a voice asking for a preset password to the voice synthesis circuit unit when the telephone is connected in the telephone line automatic connection step (S4) and outputting it to the caller through the call circuit unit; An external input number determination step (S6) of determining whether there is a set number by inputting an externally input number to the microcomputer through the DTMF receiver when the voice is output in the voice output step (S5); A waiting time determining step (S7) of determining a set number input waiting time if the user does not input a number in the external input number determining step (S6); If the waiting time set in the waiting time determination step (S7) has not elapsed, the process returns to the external input number determination step (S6), and if it passes, the first telephone line blocking step of blocking the telephone line by turning off the switching unit in the microcomputer ( S8); A determination step (S9) of determining whether the input password is the same as a preset password when the user inputs the number in the external input number determination step (S6); If the password inputted in the determination step (S9) and the preset password is not the same, it is determined whether it is wrong two or more times, or returns to the voice output step (S5), and if it is correct, returns to the first telephone line blocking step (S8). Determining the number of fine input numbers (S10); A melody generating step (S11) of generating a call melody if the password inputted in the determination step (S9) and the preset password are the same; An off-hook determination step (S12) of determining whether a user picks up the handset after the melody occurs in the melody generation step (S11); A first melody end step (S13) of terminating the incoming melody when the handset is heard in the off hook determination step (S12); A call step (S14) of making a phone call with the other party when the melody ends in the melody ending step (S13); A melody occurrence time determining step (S15) of determining whether a melody has occurred for a set time or more if the handset is not lifted in the off hook determination step (S12); End of the second melody step of returning to the off-hook determination step (S12), if it does not occur more than the time set in the melody generation time determination step (S15), if the abnormality terminates the melody, and outputs a message to the other party ( S16); When the melody is terminated in the second melody ending step (S16), it characterized in that it comprises a second telephone line blocking step (S17) for blocking the telephone line.

1 is a block diagram showing the configuration of a typical telephone;

2 is a block diagram showing an apparatus for preventing mischief calls according to an embodiment of the present invention;

3A and 3B are flowcharts illustrating a method for preventing prank calls according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

100: microcomputer 200: first bridge circuit

300: second bridge circuit 400: switching unit

500: call circuit 600: DTMF signal receiver

700: telephone ring generator 800: telephone ring detector

900: Melody generator 1000: voice synthesis circuit

1100: relay 1200: speaker

TR1: Transistor

Hereinafter, the above-described contents will be described in detail through an embodiment according to the present invention.

As shown in FIG. 2, the microcomputer 100 first detects various types of state of the telephone (telephone ringing state, DTMF (DUAL TONE MULTIFREQUENCY) received data, handset state, etc.), and detects a control signal accordingly. Outputs the first bridge circuit 200 to connect the telephone line of the tip and the ring input irrespective of the polarity, and the second bridge circuit 300 performs the same operation as the first bridge circuit 200. Then, the power to generate a ring signal is applied.

In addition, the switching unit 400 receives the control signal of the microcomputer 100 to turn on / off the signal output from the first bridge circuit unit 200, and the call circuit unit 500 in the switching unit ( The signal output from 400) is input to match the DC characteristics between the tip and the ring to form a telephone line for transmitting, receiving, and side-tone, and adjusting the strength of the signal to adjust the set value of the transmitted / received voice signal.

In addition, the DTMF signal receiving unit 600 receives the signal output from the call circuit unit 500 converts the number dialed by an external caller to the BCD code so that the microcomputer 100 can interpret, and the telephone ring The generation unit 700 receives the power output from the second bridge circuit unit 300 so that the telephone ring can be ringed, and the telephone ring detection unit 800 receives the signal output from the telephone ring generator 700 to ring the bell. The incoming state of the signal is changed to a high / low signal state and is output to the microcomputer 100 to detect the incoming state of the telephone ring.

In addition, the melody generating unit 900 receives the control signal output from the microcomputer 100 to generate a melody indicating the state of the phone, the voice synthesis circuit unit 1000, the control signal output from the microcomputer 100 Is inputted to output a preset message, and the transistor TR1 performs on / off operation on the signal output from the microcomputer.

In addition, the relay 1100 receives and outputs signals output from the melody generator 900 and the telephone bell generator 700 according to the on / off state of the transistor TR1, and the speaker 1200 receives the signals. The present embodiment is configured by receiving a signal output from the relay 1100 and informing the user that a call has been made.

Hereinafter, a description will be given of the operation process of the prank call prevention device configured as described above.

First, when an unspecified number of people make a phone call in an on-hook state without a receiver, power is generated to generate a ring signal in the second bridge circuit unit 300, and the power output from the second bridge circuit unit 300 generates a telephone ring. Received input from the unit 700 so that the phone rings.

In addition, when the signal output from the telephone ring generator 700 is input from the telephone bell detector 800, the ring signal is received and converted to a high / low signal state and output to the microcomputer 100, the telephone ring Receives a signal output from the sensing unit 800 from the microcomputer 100 and outputs a control signal for outputting a predetermined message, and the control signal output from the microcomputer 100 to the voice synthesis signal unit 1000 When the message is input from the preset message, for example, enter a password, etc., the message output from the voice synthesis circuit unit 1000 is received from the call circuit unit 500 and outputs to the unspecified number of people.

In addition, when the unspecified majority hears the message output from the call circuit unit 500 and inputs a password, the call circuit unit 500 receives and outputs the password, and the DTMF signal receiving unit outputs the password output from the call circuit unit 500. When the user's password is inputted at 600 and converted into a BCD (Binary Coded Decimal) code so that the password of the caller can be interpreted by the microcomputer 100, the microcomputer outputs the signal output from the DTMF signal receiver 600. If the password is correct from 100), the microcomputer 100 outputs a control signal.

In addition, the control signal output from the microcomputer 100 is input from the melody generating unit 900 to generate a melody informing the user that the phone call, and the control signal output from the microcomputer 100 to the transistor TR1 When the input signal is turned on, the signal output from the transistor TR1 is received from the relay 1100 and connected to the melody generator 900. When the transistor TR1 is turned off, the relay 1100 is ringed. It is connected to the generation unit 700, and the melody output from the melody generation unit 900 can be generated through the speaker 1200, so that the user can know that the call.

In addition, when the user hears the melody generated in the speaker 1200 and the user picks up the telephone, the first bridge circuit unit 200 connects the telephone line of the tip and the ring input regardless of the polarity and outputs the first bridge. When the signal output from the circuit unit 200 is input from the switching unit 400 and the switching unit 400 is turned on by the control signal of the microcomputer 100, the signal output from the switching unit 400 is called. The input from the circuit unit 500 allows the user and the other party to talk.

In addition, the microcomputer 100 blocks the telephone line when the password output from the DTMF receiving circuit unit 600 is different from the set password, and gives a waiting time for inputting the password to block the telephone line if the password is set more than the set number of times. do.

In addition, when the user sets up the telephone for the first time, if the contact point of the relay 1100 is connected to the telephone ring generator 700, the telephone rings immediately when the other party makes a telephone call so that the other party does not have to enter a password.

On the other hand, the prank call prevention method of the present invention determines whether the user has set the phone to the incoming call control method (S1), if the incoming call control method is terminated in the incoming call control method determination step (S1), and if it is correct whether the incoming call signal In step S2, if the telephone ring is not received in the call ringing decision step (S2), the call is terminated, and if it is correct, it is determined whether the ringing of the telephone ring has been set a number of times (S3).

In addition, if the telephone ring does not ring the set number of times in the telephone ring determination step (S3), it ends, and if it is correct, the microcomputer 100 outputs a control signal, and when the switching unit 400 is turned on, the telephone line is automatically connected to make a call. When a person and a telephone are connected (S4), and when the telephone is connected in the telephone line automatic connection step (S4), the voice synthesis circuit unit 1000 asks for a preset password. For example, enter a password. It is output to the caller through (S5).

Then, if the voice is output in the voice output step (S5), a person who has made an external call inputs a password and inputs the password to the microcomputer 100 through the DTMF receiving circuit 600 to determine whether there is a set number. If the user does not input the number in the external input number determination step (S6), the set number input waiting time is determined (S7), and the waiting time set in the waiting time determination step (S7) has not passed. If not, the process returns to the external input number determination step (S6), and if it passes, the phone line is blocked by turning off the switching unit 400 in the microcomputer (S8).

In addition, when the user inputs the number in the external input number determination step (S6), it is determined whether the input password is the same as the preset password (S9), and the password input in the determination step (S9) and the preset password are the same. If not, it is determined whether it is wrong two or more times. Otherwise, the process returns to the voice output step S5, and if correct, the telephone line returns to the first telephone line blocking step S8 (S10).

In addition, if the password entered in the determination step (S9) and the preset password is the same to generate a call-in melody (S11), after the melody occurs in the melody generation step (S11) by determining whether the user picked up the handset (S12) If the handset is heard in the off-hook determination step (S12), the incoming melody is terminated (S13).

In addition, when the melody ends in the first melody ending step (S13), a telephone call is made with the other party (S14). If the handset is not lifted in the off-hook determination step (S12), the melody generating unit 900 Determining whether or not the melody has occurred in (S15), if it does not occur more than the time set in the melody generation step (S15) returns to the off hook determination step (S12), if the abnormality ends the melody, the message that the other party is absent It outputs (S16), when the melody is terminated in the second melody termination step (S16) blocks the telephone line (S17).

As described above, the present invention prank call prevention device and method, so that the caller can control the incoming signal of the incoming call from the outside by entering a password so that only a specific person who knows the password can make a phone call Even if you make a prank call from the outside, if the password is wrong, the call will be automatically disconnected, which will prevent prank calls.

Claims (2)

A microcomputer which senses various states of the telephone (telephone ringing state, DTMF reception data, handset state, etc.) and outputs a control signal according thereto; A first bridge circuit unit for connecting a telephone line of an input tip and a ring irrespective of polarity; A second bridge circuit unit which operates in the same manner as the first bridge circuit unit and applies power to generate a ring signal; A switching unit receiving the control signal of the microcomputer and turning on / off a signal output from the first bridge circuit unit; Call circuit unit for receiving a signal output from the switching unit to match the DC characteristics between the tip and the ring impedance to form a telephone line of the call, sign, and sidetone, and to adjust the set value of the voice signal transmitted and received by adjusting the signal strength Wow; A DTMF signal receiving unit which receives a signal output from the call circuit unit and converts the number pressed by an external caller into a BCD code so that the microcomputer can interpret the number pressed; A telephone ring generator configured to receive a power output from the second bridge circuit unit to ring a telephone ring; A telephone ring detector for receiving a signal output from the telephone ring generator and converting a state in which a bell signal is received to a high / low signal state and outputting the signal to the microcomputer to detect an incoming state of the telephone ring; A melody generator for receiving a control signal output from the microcomputer and generating a melody indicating a state of a telephone; A voice synthesis circuit unit for receiving a control signal output from the microcomputer and outputting a preset message; A transistor turned on / off by a signal output from the microcomputer; A relay connected to the melody generating unit and the telephone ring generating unit according to an on / off state of the transistor to output a signal generated by the melody generating unit and the telephone ring generating unit; And a speaker configured to receive a signal output from the relay to notify a user that a call has been made. An incoming call control method determination step (S1) for determining whether the user has set the telephone to the incoming call control method; A call ringing decision step (S2) of terminating if the call control method is not received in the incoming call control method judging step (S1), and determining if a call ring signal is received; A call ring determination step (S3) of determining if the call ring does not ring at the call ringing determination step (S2), and determining if the call ring has been ringed a predetermined number of times; An automatic telephone line connection step (S4) of automatically terminating the telephone line by turning on the switching unit under the control of the microcomputer if the telephone ring does not ring the set number of times in the telephone ring determination step (S3); A voice output step (S5) of reproducing a voice asking for a preset password to the voice synthesis circuit unit when the telephone is connected in the telephone line automatic connection step (S4) and outputting it to the caller through the call circuit unit; An external input number determination step (S6) of determining whether there is a set number by inputting an externally input number to the microcomputer through the DTMF receiver when the voice is output in the voice output step (S5); A waiting time determining step (S7) of determining a set number input waiting time if the user does not input a number in the external input number determining step (S6); If the waiting time set in the waiting time determination step (S7) has not elapsed, the process returns to the external input number determination step (S6), and if it passes, the first telephone line blocking step of blocking the telephone line by turning off the switching unit in the microcomputer ( S8); A determination step (S9) of determining whether the input password is the same as a preset password when the user inputs the number in the external input number determination step (S6); If the password inputted in the determination step (S9) and the preset password is not the same, it is determined whether it is wrong two or more times, or returns to the voice output step (S5), and if it is correct, returns to the first telephone line blocking step (S8). Determining the number of fine input numbers (S10); A melody generating step (S11) of generating a call melody if the password inputted in the determination step (S9) and the preset password are the same; An off-hook determination step (S12) of determining whether a user picks up the handset after the melody occurs in the melody generation step (S11); A first melody end step (S13) of terminating the incoming melody when the handset is heard in the off hook determination step (S12); A call step (S14) of making a phone call with the other party when the melody ends in the melody ending step (S13); A melody occurrence time determining step (S15) of determining whether a melody has occurred for a set time or more if the handset is not lifted in the off hook determination step (S12); End of the second melody step of returning to the off-hook determination step (S12), if it does not occur more than the time set in the melody generation time determination step (S15), if the abnormality terminates the melody, and outputs a message to the other party ( S16); And a second telephone line blocking step (S17) for blocking a telephone line when the melody is terminated in the second melody ending step (S16).