KR200273796Y1 - Apparatus for recording Telephone Call using USB Port of Computer - Google Patents

Abstract

The present invention is installed between the telephone line of a telephone company and a computer, and the telephone control device for additionally handling the telephone service by connecting a telephone, the telephone line connection and the telephone line connection to receive the input and output of the audio signal received from the audio signal exchange A voice channel unit for processing a signal, a caller detector for detecting a caller's telephone number transmitted through the voice channel unit, a digital converter for converting a voice signal of the other party output through the voice channel unit into digital data, and the computer Connected to the USB port of the USB port, the USB port for transmitting the caller and voice information to the computer through the USB port, and the caller phone number output from the caller detector and the digital voice signal output from the digital converter After converting the data into the data conforming to the U.S. standard according to the program, By providing a control means for recording caller information and voice data on the hard disk of the computer through the non-port, the telephone control device is connected to the USB port of the computer to convert the calls received through the public telephone network to digital By using the computer's USB port, you can not only record in high quality to the computer's hard disk but also connect multiple phone control devices to the USB port of the computer to process and store the phone-related tasks and the contents of the call digitally. Provide a call recording device.

Description

Apparatus for recording Telephone Call using USB Port of Computer}

The present invention relates to a telephone call recording device using a computer, and in particular, by connecting a telephone control device with a computer's USB port to convert a telephone received through a public telephone network into a digital recording of the computer's hard disk through the USB port. The present invention relates to a telephone call recording apparatus using a USB port.

As information is networked, information transmission through the public telephone network (PSTN) is further developed. In addition to the transmission of data information by modulation and demodulation, the processing of the voice itself has been actively progressed by the development of digital voice signal processing technology. .

That is, in the conventional voice storage and playback, mechanical methods through magnetic media such as magnetic tape are mainly used. However, with the development of digital voice processing technology, voice signals can be input and output directly to and from a memory, such as a microprocessor and a voice processor. Telephone voice processing apparatus using a memory or the like has been developed.

1 is a block diagram showing a conventional telephone speech processing apparatus.

As shown, the telephone connection unit 4 is connected between the telephone line and the telephone, i.e., between the telephone base M and the handset P. The telephone connection unit 5 has a handset connection terminal 5 and a connection terminal body 6 for this purpose.

On the other hand, the control unit 1 has a recording switch (2) and the voice detection and transmission unit (2) for opening and closing the transmission of the voice information during recording or playback, the recording switch (2) is a mechanical user can press The device and a hardware switch such as a TR circuit, the voice detection and sending section 3 is composed of a filter and an amplifier circuit such as an operational amplifier.

On the other hand, the computer connection unit 7 is a voice signal connection terminal 8 for connecting a voice signal through the control unit 1 to a voice processing board such as a sound card of a computer, and a control command from the computer or the state of the control unit 1 to the computer. And a command communication terminal 9 such as a serial port. On the other hand, the computer is equipped with a control program for controlling each of the above components in software.

The operation of such a voice processing device is as follows.

When a call is received from the outside, the computer monitors the state of the recording switch 2 through the command state communication terminal 9. When the user detects the on state by pressing the recording switch 2, the computer digitally processes the voice signal input through the voice signal connection terminal 8 with the voice processing board and stores the data in a database at an appropriate location on the hard disk. .

In this state, when the user turns off the recording switch 2, the computer detects this and stops processing and storing the voice signal.

The digital signal stored in the computer is reproduced by the user through the voice playback function of the computer.

In the above-described recording switch 2 is configured to have a circuit configuration that is automatically turned on / off due to the user (Hook-Off) of the handset (P) or the arrival of a telephone call signal instead of the user.

According to this configuration, the conventional telephone voice processing apparatus can perform telephone recording or reproduction.

However, the conventional telephone voice processing apparatus uses both a computer's RS 232 and a sound card, and records the phone call using the sound card, or monitors or controls the state of the phone using the RS 232 serial port. do.

The voice signal input to the sound card is an analog type, and only one telephone voice processing device is connected to one computer due to a collision caused by installing multiple sound cards in one computer.

The RS 232 has a problem that it is difficult to process voice data and a large amount of data necessary for complex telephone control at a high speed at a lower speed than the RSB.

Therefore, the object of the present invention is to connect the telephone control device with the computer's USB port and convert the telephone call through the public telephone network to digital and record the telephone call recording device using the computer's USB port through the USB port. To provide.

In addition, another object of the present invention is to provide a telephone call recording apparatus using a computer's US port that can be connected to a plurality of telephone control devices to the USB port of the computer to digitally process and store the phone call contents.

1 is a block diagram showing a phone voice processing apparatus according to the prior art,

Figure 2 is an installation diagram showing a telephone call system using the US port of the computer according to the present invention

Figure 3 is a block diagram showing a telephone call recording device using the US port of the computer according to the present invention

4 and 5 are screen states showing an example of the telephone service processing program applied to the present invention,

6 is a block diagram showing a detailed configuration of the control means of FIG.

FIG. 7 is a circuit block diagram illustrating a telephone interface related part of FIG. 3.

FIG. 8 is a circuit block diagram illustrating a detailed configuration of the digital converter of FIG. 3.

9 is a circuit block diagram showing a detailed configuration of the dial processing unit of FIG.

10 is a circuit block diagram showing a detailed configuration of the sender detection unit of FIG.

11 is a flowchart illustrating a call recording method according to the present invention.

* Explanation of symbols for main parts of the drawings

10: personal computer 11: uss port

15: Hard Disk 17: Central Processing Unit (CPU)

30: telephone line telephone line 50: telephone

100: telephone control device 101: telephone line connection

105: telephone connection unit 110: audio channel unit

120: caller detection unit 130: digital conversion unit

140: USB connector 150: control means

161: telephone line monitoring unit 165: telephone line control unit

171: telephone monitoring unit 175: telephone control unit

180: dial processing unit 190: power supply unit

Technical means of the present invention for achieving the above object is provided between a telephone line of a telephone station and a computer, the telephone control device for automatically handling the telephone service by additionally connecting a telephone: connected to the telephone line to the voice signal Telephone line connection unit for transmitting and receiving; A telephone connection unit connected to the telephone and transmitting and receiving a voice signal through a telephone line; A voice channel unit which receives a voice signal inputted and outputted through the telephone line connection unit and the telephone connection unit and processes the voice signal into an AC signal of a voice band; A caller detector for detecting a caller's telephone number transmitted through the voice channel unit; A digital converter for converting a voice signal of the other party output through the voice channel unit into digital data; A USB port connected to a USB port of the computer and transmitting caller and voice information to the computer through the USB port; And converting the caller's telephone number output from the caller detection unit and the digital voice signal output from the digital conversion unit into data conforming to the USB standard according to a predetermined program, and then calling the caller information and voice data on the hard disk of the computer through the USB port. And control means for controlling to record the data.

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

2 is an installation diagram showing a telephone call system using a US port of a computer according to the present invention, showing a computer 10, a telephone line 30, a telephone 50 and the telephone control device 100.

The telephone call system according to the present invention connects a plurality of telephone control devices (100-100n) to a single computer (10) to automatically process telephone work through the computer 10, the telephone control device 100 is a predetermined It is connected by the USB port 11 of the computer 10 via the USB interface of the.

In addition, the USB port 11 of the computer 10 is extended to a plurality of USB ports 11 by a predetermined USB hub to connect and connect the plurality of telephone control apparatuses 100-100n.

The telephone control apparatus 100 installed between the computer 10 and the telephone line 30 and the telephone 50 converts analog voice signals into digital and performs functions such as call control and caller ID detection. In particular, during the telephone call, the other party's ID (ID) and voice are converted to digital and transmitted to the computer 10 through the USB port 11, and then the computer 10 calls the telephone according to a setting program. The voice is recorded on the hard disk 15 and recorded.

3 is a block diagram illustrating a telephone call recording apparatus using a US port of a computer according to the present invention, and shows a computer 10, a telephone line 30, a telephone 50, and a telephone control apparatus 100.

The computer 10 is a PC such as a desktop, laptop, or palmtop, and the basic configuration applied to the present invention includes a universal serial bus (USB) port 11, which is a universal serial communication bus for data communication with an external device, It consists of a telephone work processing program, a hard disk 15 storing various voices and data, and a central processing unit 17 (CPU) for controlling the operation of the above-mentioned devices.

In addition, the telephone control device 100, which is installed between the telephone line 30 and the computer 10 of the telephone station, and additionally connects the telephone 50 to automatically process the telephone service, is connected to the telephone line 30 and has a voice. Telephone line connection unit 101 for transmitting and receiving signals, telephone connection unit 105 is connected to the telephone 50 and transmits and receives a voice signal through the telephone line 30, the telephone line connection unit 101 and the telephone connection unit ( A voice channel unit 110 that receives a voice signal input and output through 105 and processes an AC signal of a voice band, and a caller detector 120 that detects a caller's telephone number transmitted through the voice channel unit 110; A digital converter 130 for converting the voice signal of the other party output through the voice channel unit 110 into digital data, and connected to the USB port 11 of the computer 10, and the USB port 11. Send caller and voice to computer (10) via After converting the UESB connector 140, and the sender's telephone number output from the caller detection unit 120 and the digital voice signal output from the digital conversion unit 130 into data suitable for the USB standard according to a predetermined program. Control means 150 for controlling to record the caller information and voice data to the hard disk 15 of the computer 10 via the USB port (11).

In addition, the telephone control apparatus 100 includes a dial processing unit 180 for generating a predetermined DTMF signal according to the telephone dial signal output from the control means 150, and a telephone line 30 connected to the telephone line connection unit 101. And monitoring the state of the control unit 150 and the telephone line monitoring and control unit (161, 165) for controlling the on / off of the telephone line 30 in accordance with the control signal output from the control means 150, Monitoring the state of the telephone line between the telephone 50 connected to the telephone connection unit 105, and transmits to the control means 150, and outputs the output line of the telephone 50 in accordance with the control signal output from the control means 150 The power supply unit for receiving power supplied from the computer 10 through the telephone monitoring and control unit (171, 175) to turn on / off, and converts into a suitable voltage to apply the power to the overall circuit ( 190 more equipped And there.

In addition, the telephone station is connected to the telephone line connection unit 101 of the telephone control apparatus 100 through the telephone line 30, the telephone 50 is connected to the telephone connection unit 105 of the telephone control apparatus 100. .

That is, the hard disk 15 of the computer 10 stores the telephone work processing program, the personal information of the customer, and the contents of the call. When the telephone work processing program is executed through the central processing unit 17, the computer 10 A screen as shown in FIG. 4 is displayed on the screen 19 of the screen, and the main items such as 'information search', 'environmental setting', etc. according to the user's needs are selected on the screen, and then a corresponding sub-item is selected to select Just handle

If a ring signal sounds, a change in current and voltage occurs in the telephone line 30 connected to the telephone station, and is detected by the control means 150 of the telephone control apparatus 100 and the computer 10 through the USB port 11. And detects the caller's telephone number through the caller detector 120 of the control means 150 and outputs the caller's telephone number to the control means 150. The control means 150 outputs the caller's telephone number through the USB port 11. Transfer to computer 10. The computer 10 searches the customer information of the hard disk 15 using the transmitted caller's phone number, and if there is a corresponding customer, the customer information is displayed on the screen together with a message indicating that the call is received as shown in FIG. do. If there is no corresponding customer information, only the calling party number is displayed. Subsequently, the user records and manages the customer information and the call contents in the hard disk 15.

Then, after displaying the specific customer information as shown in FIG. 4 and selecting the automatic dial key on the screen, the previously stored customer phone number is transmitted to the telephone control device 100 through the USB port 11, the telephone control device 100 Control unit 150 generates a DTMF signal through the dial processing unit 180 and transmits the DTMF signal to the corresponding customer, and when the user is connected, the user can pick up the handset of the telephone 50 and make a call.

In addition, a feature of the present invention is to store the contents of the call on the hard disk 15 of the computer 10 while talking to the other party, the method has a large recording mode and manual recording mode.

First, the user can select the automatic recording item on the telephone work processing screen displayed on the monitor 19 of the computer 10 by the automatic recording method.

In this setting, when a ring signal sounds and the user picks up the handset (off-hook), a change in current and voltage occurs in the telephone line 30 connected to the telephone station, and the control means 150 of the telephone control apparatus 100 changes. Is detected and notified to the computer 10 through the USB port 11. Then, the central processing unit 17 of the computer 10 stores and records the digital voice signal transmitted through the USB port 11 on the hard disk 15.

Of course, when the handset of the telephone 50 is put down (On-Hook), a change in current and voltage occurs in the telephone line 30 connected to the telephone station, which is detected by the control means 150 of the telephone controller 100. The computer 10 is informed via the USB port 11. Then, the central processing unit 17 of the computer 10 stops recording the audio data on the hard disk 15.

Another method is not to select an automatic recording item from the telephone work processing screen displayed on the monitor 19 of the computer 10 by manual recording, but to display it on the screen 19 of the computer 10 during a call with the other party. When the recording start button is clicked or the shortcut key is pressed, the recording is started, and when the recording stop button displayed on the screen 19 is clicked, the recording is stopped on the computer 10 hard disk 15.

In addition, a separate recording start and end switches may be added to the telephone control apparatus 100 to record voice, but in this case, the telephone control apparatus 100 should always be located at an adjacent position of the user, that is, on the desk. This is undesirable because it is inconvenient to secure space on the desk.

FIG. 6 is a block diagram showing a detailed configuration of the control means of FIG. 3, wherein the control means 150 drives the logic value of the USB data with a voltage and current suitable for the rated standard through the USB connector 140. 10) and a USB processor 151 for converting the voltage level transmitted from the computer 10 into a logic value, and controlling the USB data, and managing a control signal of the USB standard to control the microprocessor 155. And a serial interface engine 153 for exchanging data with each other, and a microprocessor 155 for controlling and managing the functions of the various devices according to a program preset in the memory 157.

That is, the control means 150 is connected to the USB port 11 of the computer 10 through the USB connector 140.

The USB transmission unit 151 drives the logic value (1 or 0) of the USB data to the computer 10 by driving the voltage and current according to the rated standard, and transmits the voltage level transmitted from the computer 10 to the logic value ( 1 or 0), the serial interface engine 153 controls the USB data, manages the control signal data of the USB standard, etc., exchanges data with the USB connector 140, and the microprocessor 155 stores the memory 157 Control operation of the function of the telephone control device 100 according to the program stored in the).

In addition, the voice data of the telephone control device 100 communicates with the USB port 11 in an isochronous transmission method, and the control signal and general data are communicated with the computer 10 and the USB port in a bulk transmission method. 11) to communicate with.

Fig. 7 is a circuit block diagram showing the telephone interface related part of Fig. 3, wherein the telephone line connecting portion 101 is connected to the telephone line 30 of the telephone station or the extension telephone line of the private exchange, and the telephone connecting portion 105 is the telephone 50. Connect it.

In addition, the telephone line connection unit 101 and the telephone connection unit 105 have overvoltage protection units 102 and 106, respectively, which protect the circuit from external high voltage shocks and allow overvoltage to flow into the phone 50. To prevent them.

The telephone line monitoring unit 161 monitors the current and voltage of the telephone line to output data to the control unit 150, and the telephone line control unit 165 is connected to the output port of the control unit 150. When the loop of the telephone line is connected in accordance with the telephone line control unit 165, the DC current supplied from the telephone station is bypassed and is switched to a busy state.

Accordingly, the AC signal of the voice band of the telephone side is transmitted to the input side of the digital converter 130 and the caller detector 120 by the voice channel unit 110, and the dial processing unit 180 is the voice channel unit 110. It transmits the AC signal of voice band to the telephone side through).

Meanwhile, the hook on / off state of the telephone 50 of the telephone monitoring unit 171 is sensed and supplied to the input port of the control unit 150, and the telephone control unit 175 is independent of the hook state of the telephone 50. The circuit formed by the telephone 50 is cut off or connected.

It is preferable that the telephone circuit and the logic circuit are insulated by the voice channel unit 110 so that only the AC component of the voice band is transmitted to each other while preventing interference from a power source and a signal between each other.

Since the dial processing unit 180 has a low impedance due to the structure of the operational amplifier, the dial processing unit 180 controls the channel so that the dial processing unit is connected at a necessary time rather than always connected to an external input / output circuit.

FIG. 8 is a circuit block diagram illustrating a detailed configuration of the digital conversion unit of FIG. 3, which maintains a sampling rate of a telephone call voice signal applied through the voice channel unit 110 and removes noise from a sampling rate by an internal capacitor. A noise canceling circuit 131 set to an appropriate value to remove noise, a voltage distribution converter 132 outputting analog voltage and corresponding digital data for a specific voltage based on an external reference voltage, and the noise Comparator 133 for receiving the audio signal sound and the output data of the voltage distribution converter 132 output from the elimination circuit unit 131 to the non-inverting and inverting terminals, respectively, and compares the difference between the analog values and the comparator (133). Data bus driver 1 that receives the voice digital data corresponding to the digital value output from the 133 through the control logic 134 and delivers to the control means 150 35) and a clock oscillator 136 for generating a clock for the operation of an internal circuit and a sampling rate for converting analog data of the voltage distribution converter 132 into digital data.

In other words, the noise canceling circuit unit 131 (Track / Hold) removes the noise while maintaining the sampling rate of the telephone call voice signal applied through the voice channel unit 110, and the internal capacitor is an appropriate value of the noise removal relative to the sampling rate. Is set.

The voltage divider converting unit 132 outputs an analog voltage with respect to a specific voltage and digital data corresponding thereto based on an external reference voltage, and an output value of the applied voice signal sound and the voltage divider converting unit 132 is a comparator 133. Is provided to the control logic by checking the difference of analog values.

Therefore, the input analog signal is transmitted to the control means 150 through the data bus driver 135 in correspondence with the digital value for the reference voltage.

FIG. 9 is a circuit block diagram showing a detailed configuration of the dial processing unit of FIG. 3. As shown, the DTMF generator 185 can control the telephone call as if the DTMF generator 185 can make a telephone call by pressing the dial button of the telephone 50. The phone dial is sent during the operation of the device by generating a frequency corresponding to the data value output from.

In addition, when performing a caller telephone number detection function, if a caller signal is detected from the telephone station, the caller sends a confirmation signal for the caller signal so that the caller can send the calling information data. The confirmation signal is a complex frequency corresponding to 1633Hz and 941Hz as the "D" value of DTMF data.

In addition, the control logic 181 transmits DTMF data to be generated by receiving data from the control means 150 to the DTMF generator 185 and transmits the voltage level value of the DTMF signal to the signal level controller 183 to increase the size of the signal. To control.

The signal generated by the DTMF generator 185 is applied to the amplifier input based on the source frequency of the oscillator 189 to operate as a signal source having a low output impedance.

FIG. 10 is a circuit block diagram showing a detailed configuration of the caller detecting unit of FIG. 3, which is required by an amplifier 121 for receiving and amplifying a caller's telephone number from the voice channel unit 110 and a signal output from the amplifier 121. FIG. Band filter section 123 for passing the signal in the frequency band and removing noise, and FSK detector 125 for converting data of a frequency shift keying (FSK) method having a constant transmission rate output from the band filter section to a logic level. And a caller information detector 127 which detects and outputs a caller signal tone when the caller is transmitted from the telephone station, and outputs data of the FSK detector 125 and a caller tone when the caller signal tone is output from the caller information detector 127. It consists of a data processor 129 output to the control means 150.

That is, the source number signal applied from the voice channel unit 110 is applied to the input terminal of the amplifier 121 having a high impedance, and the output of the amplifier 121 passes only the frequency band required by the band filter 123. And noise is removed.

In addition, the FSK detector 125 converts the data of the FSK method having a transmission rate of 1200 bits / sec to a logic level, and the originating information detector 127 transmits to the data processor 129 when an outgoing information signal tone transmitted from the telephone station is detected. To pass. The data processor 129 processes and transmits the FSK data and the transmission information signal to be received by the control means 150 when it is detected.

FIG. 11 is a flowchart illustrating a method of recording call contents according to the present invention, which will be described with reference to FIG. 3.

First, in the automatic call recording mode, the telephone monitoring unit 171 of the telephone control apparatus 100 monitors whether the telephone 50 is in the off-hook state and, if the telephone 50 is in the off-hook state, the control means 150. This is notified (S1).

Subsequently, the control means 150 generates the caller's telephone number and the recording start data provided through the caller detector 120 and sequentially transmits the caller's telephone number and the recording start data to the computer 10 through the USB connector 140 (S2).

The central processing unit 17 of the computer 10 searches the customer information contained in the hard disk 15 to determine whether there is customer information that matches the caller's phone number, and if there is the corresponding customer information, a screen with the caller's phone number. It is displayed on (S3).

Subsequently, the digital conversion unit 130 converts the voice signal input through the voice channel unit 110 into a digital signal according to a predetermined sampling frequency (S4) and then outputs the control signal to the control means 150. This is transmitted to the computer 10 through the USB connector 140 (S5), the central processing unit 17 of the computer 10 is to record and store the voice call to the address of the customer (S6).

When the phone 50 is hooked on after storing the contents of the call in the above manner (S7), the phone monitoring unit 171 detects it and outputs it to the control means 150. Accordingly, when the control means 150 generates the recording end data and transmits the data to the computer 10 through the USB connector 140 (S8), the central processing unit 17 stops storing the contents of the call (S9). ).

Of course, as described above, it is possible to operate in the manual mode of starting the recording according to the user's recording start command on the screen program of the computer 10 during the call with the customer and stopping the recording according to the user's recording stop command.

While specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be embodied in various modifications by those skilled in the art. Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, but should fall within the claims appended to the present invention.

Therefore, in the present invention, the telephone control unit is connected with the USB port of the computer to convert the incoming call through the public telephone network to digital to record high quality on the hard disk of the computer through the USB port, as well as a plurality of the USB port of the computer By connecting a telephone control device, there is an advantage in that it can digitally process and store telephone-related tasks and contents of a telephone call digitally.

Claims (5)

In a telephone control device installed between a telephone line of a telephone company and a computer, the telephone control unit automatically connects a telephone to handle telephone work: A telephone line connection unit connected to the telephone line to transmit and receive a voice signal; A telephone connection unit connected to the telephone and transmitting and receiving a voice signal through a telephone line; A voice channel unit which receives a voice signal inputted and outputted through the telephone line connection unit and the telephone connection unit and processes the voice signal into an AC signal of a voice band; A caller detector for detecting a caller's telephone number transmitted through the voice channel unit; A digital converter for converting a voice signal of the other party output through the voice channel unit into digital data; A USB port connected to a USB port of the computer and transmitting caller and voice information to the computer through the USB port; And After converting the caller's telephone number output from the caller detection unit and the digital voice signal output from the digital conversion unit into data conforming to the UBSB standard according to a predetermined program, the caller information and the voice data are transmitted to the hard disk of the computer through the USB port. And a control means for controlling to record the telephone call recording apparatus using a USB port of a computer. The method according to claim 1, The telephone control device, A dial processing section for generating a predetermined DTMF signal in accordance with the telephone dial signal output from the control means; A telephone line monitoring control unit which monitors the state of the telephone line connected to the telephone line connection unit and transmits it to a control unit and controls on / off of the telephone line according to a control signal output from the control unit; A telephone supervisory control unit that monitors a state of a telephone line between telephones connected to the telephone connection unit and transmits it to a control unit, and turns on / off an output line of the telephone in accordance with a control signal output from the control unit; And And a power supply unit which receives the power provided through the USB port and converts the voltage into an appropriate voltage to apply power to the overall circuit. The telephone call recording apparatus using the USB port of the computer further comprises. The method according to claim 1, The control means, A USB bus driver for driving a logic value of the USB data to the computer through the USB port to a voltage and current suitable for a rated standard, and converting the voltage level transmitted from the computer into a logic value; A serial interface engine for controlling the USB data and managing data of a USB standard to exchange data with a microprocessor; And And a microprocessor for controlling and managing a function of the apparatus according to a program preset in a memory. The method according to claim 1, The digital conversion unit, A noise canceling circuit unit which maintains a sampling rate of a telephone call voice signal applied through the voice channel unit and removes noise by setting an appropriate value of noise canceling to a sampling rate by an internal capacitor; A voltage distribution converter for outputting an analog voltage and digital data corresponding to a specific voltage based on an external reference voltage; A comparator for receiving the voice signal sound output from the noise canceling circuit unit and the output data of the voltage division conversion unit to be provided as non-inverting and inverting terminals, respectively, and comparing the difference between analog values; A data bus driver which receives voice digital data corresponding to the digital value output from the comparator through a control logic and transmits the received voice digital data to a control unit; And And a clock oscillator for generating a clock for the operation of an internal circuit and a sampling rate for converting analog data into digital data of the voltage divider converter. 2. The method according to claim 1, The caller detection unit, An amplifier for receiving and amplifying a caller's telephone number from the voice channel unit; A band filter unit for passing the required frequency band signal and removing noise from the signal output from the amplifier; An FSK detector for converting FSK (Frequency Shift Keying) data having a constant transmission rate output from the band filter to a logic level; A call information detector for detecting and outputting a call information signal tone transmitted from a telephone station; And And a data processor for outputting the output data of the FSK detector and the outgoing information signal tone from the outgoing information detector and processing the data into appropriate data and outputting the data to the control means.