KR100255928B1 - A communication terminal device capable of confirming sender's identification on-hook state - Google Patents

Abstract

PURPOSE: A communicating terminal with a caller identifying function is to display information of a caller together with a calling signal when receiving the calling signal in an on-hook state, thereby providing convenience to a user. CONSTITUTION: A transformer(45) for matching impendence with a system is connected to a tip line and a ring line for inputting/outputting a desired ring signal and data. A communicating line switch for controlling an input/output of the data according to a desired control signal is connected to a tip line as a connecting line of a main wire and the transformer. A ring signal detecting portion(40) for detecting the ring signal input from the main wire is connected between the tip line and the ring line. A bypass capacitor is connected between the tip line and the ring signal detecting portion to pass an AC signal and block a DC signal. A data switch is connected between a connecting node of the bypass capacitor and the ring signal detecting portion and a connecting node of the communicating line switch and the transformer to control an input of a number DTMF(dual tone multi frequency) signal according to a desired control signal.

Description

Communication terminal with caller identification in on-hook state

The present invention relates to a communication terminal having a caller's telephone number verification function, and more particularly to a communication terminal having a caller identification function in an on-hook state in which the caller's information can be provided together with an incoming ring signal in the on-hook state.

Currently, telephones are the most common and widely used among telecommunications terminals, and the telephone culture using these phones has provided a lot of convenience in daily life, while telephone violence problems such as invasion of personal life through telephones have emerged as serious social problems. It is becoming.

In order to prevent such phone violence, telephone manufacturers have manufactured and marketed password-input telephones approved by the Ministry of Communications for the purpose of relieving people's anxiety about phone violence and creating a culture of sound phone usage. Not only can you not receive urgent calls from people who do not know you, but you have to enter a password to receive a message saying that you can make a serious call because you have to pay a fee without having to speak directly with the called party. It could not be a fundamental solution to the violence problem.

Therefore, in order to solve the above problem, a caller's telephone number verification apparatus capable of verifying a caller's telephone number has been developed.

1 is a block diagram showing the configuration of an electronic exchange using the caller's telephone number verification device.

In Fig. 1, reference numeral 10 denotes an electronic switch for connecting a communication network between wired subscribers or communication systems, 11 denotes a subscriber circuit for matching with a subscriber terminal, 12 denotes an input / output port for data input and output, and 13 denotes a sender. It is a relay line circuit for matching the relay line with the telephone number confirmation device (20).

In addition, reference numeral 20 is a caller's telephone number confirmation device to be able to check the telephone number of the caller, 21 is connected to the input and output port 12 of the electronic exchanger 10 by the hook switch operation of the incoming subscriber's telephone Input and output port input unit for receiving the related message including the telephone number and the call time of the calling subscriber outputted from the (10) to organize the data file of the same format to the subscriber database 29, 22 is the electronic switch 10 Connected to the trunk line circuit (13), the service registration subscriber dials the designated special number to check the telephone number of the calling subscriber who has called, and the subscriber circuit 11 and the trunk line circuit 13 of the telephone exchange 10 It is a relay line matching circuit constituting a call path with the caller phone number confirmation device 20 through.

In addition, in FIG. 1, the DTMF signal receiver 23 is connected to the relay line matching circuit 22 to receive and process an additional information request signal for the service registration subscriber to additionally check the calling number, and the R2 signal transmitter 24 And the R2 signal processing unit 25 is connected to the relay line matching circuit 22 and automatically receives the telephone number of the service registered subscriber requesting confirmation of the outgoing telephone number by the R2 signaling method with the electronic switch 10, and then The subscriber database 29 is searched to provide only the registered subscriber's telephone number to the corresponding service registered subscriber, and the outgoing signal transmitter 26 including the voice guidance means 27 and the DTMF signal transmission means 28 is provided. ) Is connected to the trunk line matching circuit 22 and retrieves the data file stored in the subscriber database 29 to the subscriber who requested verification of the calling party number. By synthesizing the time by voice or sending it out as a DTMF signal, it is displayed as a number on the screen display device attached to the subscriber's telephone, and the subscriber database 29 is the outgoing telephone number and call processed by the input / output port input unit 21. Efficiently store and manage the time, and also provides the calling number and the call time dialed to the corresponding subscriber requested by the calling number transmitting unit 26, the central control unit 30 all signals related to the operation of the device To control.

The caller's telephone number confirmation device having the above-described configuration is configured to output a malicious code related message outputted in a different format through the designated input / output port 12 according to the model of the electronic exchange 10. After receiving through the function of storing the data file of the same format and stored in the subscriber database 29, and subscribers who want to check the telephone number of the calling subscriber who dialed, dial the specified special number, the electronic exchange 10 Is connected to the relay line matching circuit 22 of the apparatus 20 through the relay line circuit 13 of the apparatus 20, and the telephone number of the service registered subscriber who has requested the confirmation of the outgoing telephone number is connected to the R2 signaling method with the electronic switch 10. By automatically receiving and processing the R2 signal receiving unit 24 and the R2 signal processing unit 25 by providing the outgoing telephone number only to the corresponding service registered subscriber, and the apparatus 20. Search the data file stored in the subscriber database 29 and call the service registration subscriber who requested the calling telephone number and notify the telephone number and call time of the calling subscriber that the calling number transmitting unit 25 synthesizes the voice or DTMF. A function of displaying a number on a screen display device attached to a telephone and when a plurality of outgoing telephone numbers are stored, a subscriber requesting a telephone number is operated by a pushbutton operation of the telephone set. Caller's phone number stored in c) can be continuously or separately provided with the same number according to the incoming call order, and the stored phone number can be deleted individually or in whole units.

On the other hand, the caller's telephone number verification function through the caller's telephone number verification device 20 is a function that enables the subscriber and the subscriber through the electronic switch 10 in a state in which a call path is formed, the telephone of the subscriber is in an on-hook state. In case of receiving a call from outside, the caller's telephone number verification function is not executed. Therefore, the subscriber unconditionally receives the call.

Therefore, since a phone call such as a telephone violence or an obscene call can be received, the subscriber's phone needs a function of confirming the caller's information in advance when an incoming signal is received.

Accordingly, the present invention has been made in view of the above circumstances, and when an incoming signal is received when the communication terminal is in an on-hook state in a communication terminal such as a telephone or a facsimile device, the caller's information can be displayed together with the incoming signal. The purpose is to provide a communication terminal having a caller identification function in the on-hook state.

1 is a block diagram showing the configuration of an electronic exchange using the caller's telephone number verification device.

Figure 2 is a circuit diagram showing a communication terminal having a caller identification function in the on-hook state according to an embodiment of the present invention.

3 is an output waveform diagram of a ring signal input through a trunk line and a photo coupler 40a by the ring signal.

4 is a flow chart for explaining the operation of the device of the configuration of FIG.

<Description of the symbols for the main parts of the drawings>

10: electronic exchange 11: subscriber circuit

12: input / output port 13: relay line circuit

20: caller phone number confirmation device 21: input and output port input unit

22: relay line matching circuit 23: DTMF signal receiving unit

24: R2 signal transmission and reception unit 25: R2 signal processing unit

26: call out number 27: voice guidance means

28: DTMF signal transmitting means 29: Subscriber database

30: central control device 40: ring signal detection unit

40a: photocoupler 41: modem

42: control unit 43: LCD display unit

44: ring generating portion 45: transformer

46: data storage

SW1: Call path switch SW2: Data switch

ZD1 to ZD4: Zener diodes R1 to R3: Resistance

C1 to C4: Capacitor PD: Photodiode

PT: Phototransistor Vcc: Power Supply Voltage

The communication terminal having the caller identification function in the on-hook state according to the present invention for realizing the above object is coupled to a tip line for input and output of a predetermined ring signal and data and a transformer for impedance matching with the system to the ring line, On the tip line of the coupling line of the transformer, a communication path switch for controlling the input / output of the data according to a predetermined control signal is coupled, and the ring signal detection unit detects a ring signal input from a trunk line to the tip line and the ring line. The bypass capacitor is coupled between the tip line and the ring signal detection unit, and the AC capacitor passes through the DC signal and blocks the DC signal.The coupling node of the bypass capacitor and the ring signal detection unit is coupled to the communication path switch and the transformer. Data intermittently intercepting input of number DTMF signal according to predetermined control signal between nodes. The position is coupled, characterized in that it comprises a control unit for intermittently controlling the communication path switch and the data switch in accordance with a predetermined ring signal and data signal input through the trunk line.

That is, according to the present invention having the above-described configuration, the control unit normally turns on the data switch so that the number DTMF signal is transmitted to the system through the data line through the trunk line, and then the ring signal is received through the trunk line to detect the ring signal. When the control unit turns off the data switch and turns on the communication path switch to control input / output of transmission / reception data.

Therefore, even when the communication terminal is not in the on-line state, by receiving and displaying the number DTMF signal of the calling party, the subscriber can easily recognize the calling party and can selectively receive the communication through the communication terminal.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

2 is a circuit diagram illustrating a communication terminal having a caller identification function in an on-hook state according to an embodiment of the present invention.

In FIG. 2, in the apparatus of the present invention, a tip line L1 for input / output of a predetermined ring signal and data and a transformer 45 for impedance matching with a system are installed at the ring line L2, and the tip line L1. ) Is connected in series with a communication path switch SW1 and a bypass capacitor C2 for intermittently controlling input and output of data according to a predetermined control signal.

In addition, the ring signal detector 20 is coupled to the tip line L1 and the ring line L2 to detect a ring signal input from the trunk line, and the ring signal detector 40 is connected to the tip line L1. The two control diodes (ZD1, ZD2) for suppressing the ring signal below a certain level through the resistor (R1) on the coupling line with)) are connected in series in both directions, and is operated by a predetermined ring signal on the coupling path. The photocoupler 40a is coupled, and the output coupler of the photocoupler 40a is coupled to the controller 42, which will be described later, and the power supply voltage Vcc through the resistor R2 is coupled in parallel. .

The photo coupler 40a is turned on / off according to the photodiode PD emitting the optical signal by the ring signal applied from the trunk line and the optical signal emitted from the photodiode PD and the electric signal according to the input optical signal. It includes a phototransistor (PT) for outputting a typical signal. In addition, the diode D1 is coupled in the opposite direction to the photodiode PD of the photocoupler 40a so that the current may continue to operate even when the user connects the CO line in reverse.

That is, since the photocoupler 40a does not operate in a state in which a ring signal having a predetermined frequency is not input through a trunk line, the power supply voltage Vcc coupled to the output terminal is transferred to the controller 42 through the resistor R2. The controller 42 recognizes that the ring signal is not applied to the high level output of the photocoupler 40a.

On the other hand, when a predetermined ring signal is input as shown in FIG. 3A, the photodiode PD flashes according to the corresponding frequency signal of the input ring signal, and the phototransistor PT is the photodiode PD. In accordance with the optical signal applied from the on, the power supply voltage (Vcc) through the resistor (R2) flows to the ground, as shown in Figure 3 (B), the output is a low level state.

Accordingly, the controller 42, which has been recognized as the high level state, recognizes that the ring signal is input as it is switched to the low level.

In addition, in FIG. 2, Zener diodes ZD3 and ZD4 are connected in both directions to ground between capacitors 2 and 4 of the transformer 45 to suppress instantaneous high voltage generation over a constant voltage, and the capacitors are connected in parallel. (C3) is combined. In addition, reference numeral 41 denotes a modem for transcoding the transmitted / received data, which is configured to receive a predetermined signal from the transformer 30 to a terminal connected through the resistor R3, and through the capacitor C4. The predetermined signal is transmitted.

In addition, reference numeral 42 denotes that the call path switch SW1 is normally turned off and the data switch SW2 is turned on, and when the ring signal is detected through the ring signal detection unit 40, the data is controlled. The switch SW2 is turned off and the call path switch SW1 is turned on to control transmission and reception of data, 43 is an LCD display for visually displaying the received number data, and 44 is the controller 42. A ring generating unit for outputting a predetermined telephone ring sound in accordance with the control signal of, 45 is a transformer for converting the signal applied from the trunk line to another signal level, 46 is a data storage unit for storing data.

Next, the operation of the device having the above-described configuration will be described with reference to the flowchart shown in FIG.

First, the controller 22 controls the communication path switch SW1 to be in an off state and the data switch SW2 to be in an on state, so that it is applied before a ring signal is input as shown in FIG. 3A through a trunk line. There is a standby state to receive the caller information to be received (ST1 step).

For example, when the calling subscriber makes a call to a telephone equipped with the apparatus according to the present invention, the electronic switch 10 receives the calling signal of the calling subscriber and sends out a calling signal from the subscriber database 29. Information data such as a telephone number is read out and transmitted as DTMF signals through DTMF signal sending means 28 to a telephone equipped with the apparatus according to the present invention.

Therefore, caller information, such as the telephone number or call time, date, etc., sent from the electronic exchange 10, is authorized through the trunk line as shown in FIG. The applied DTMF signal is not transmitted to the communication path switch SW1 in the off state, but is transmitted to the data switch SW2 in the on state through the bypass capacitor C1 for DC blocking AC passing.

The caller information DTMF signal such as the calling number or the call time transmitted through the data switch SW2 is induced through the transformer 45 and transmitted to the modem 41, and the modem 41 converts the code into a controller 42. ) Is applied. Therefore, when caller information is received from the trunk line via the modem 41 (step ST2), the control unit 42 displays the received number data on the LCD display unit 43 and stores the received number data in the data storage unit 45. (ST3 step).

Subsequently, when a ring signal as shown in (A) of FIG. 3 is input through the trunk line, the input ring signal emits the photodiode PD of the photocoupler 40a, and the phototransistor PT is It receives and operates this, so that the power supply voltage Vcc through the resistor R2 flows to the ground, and the output terminal becomes a low level state.

Therefore, the control unit 42, which normally receives the high level signal from the ring signal detector 40, detects that the ring signal is applied by receiving the low level signal from the ring signal detector 40. Is detected (step ST4), the control unit 42 outputs a ringing tone through the ring generating unit 44 (step ST5).

Then, the control unit 42 turns on the communication path switch SW1 and turns off the data switch SW2 while the ring signal is detected through the ring signal detection unit 40 (step ST6). Therefore, a telephone call or data transmission and reception are made through the communication path switch SW1.

Subsequently, the control section 42 terminates after performing normal control processing for phone call or data transmission and reception (ST7 step).

That is, according to the embodiment, even when the communication terminal is in the on-hook state, when the caller's telephone number is input before and after the incoming signal through the trunk line, the display unit can visually display it.

In addition, the present invention is not limited to the above embodiments and various modifications can be made within the scope without departing from the technical gist of the present invention. It is also possible to print information data such as a telephone number.

As described above, according to the present invention, it is possible to realize a communication terminal having a caller identification function in an on-hook state in which the information of the caller can be provided in the on-hook state of the communication terminal.

Claims (1)

A tip line for input / output of a predetermined ring signal and data and a transformer for impedance matching with the system are coupled to the ring line, and the input / output of the data is regulated according to a predetermined control signal on the trunk line and the tip line of the coupling line of the transformer. The call path switch for In addition, the tip line and the ring line is coupled to the ring signal detection unit for detecting a ring signal input from the trunk line, between the tip line and the ring signal detection unit is coupled a bypass capacitor for passing the AC signal and blocking the DC signal, Between the coupling node of the bypass capacitor and the ring signal detection unit and the coupling node of the communication path switch and the transformer, a data switch which intercepts the input of the number DTMF signal according to a predetermined control signal is coupled. And a control unit configured to intermittently control the communication line switch and the data switch according to a predetermined ring signal and a data signal input through the trunk line.

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