KR200209087Y1 - Multi-function telephone used by internet and pstn - Google Patents

Abstract

Multifunctional telephone using the Internet and public telephone network is connected to a PC using both the Internet and a public payphone network at the same time, and provides a variety of functions of a multifunction telephone that is expected to be the next generation communication system that meets the Internet age. The multifunctional telephone of the present invention is provided with a keypad and an LCD outside, and the internal circuit includes a microcomputer, a basic telephone circuit, a state detection unit, a caller information receiving unit, a codec unit, a branch telephone port, and a communication unit. In particular, the basic telephone circuit unit includes a hook switch and a matching transformer, and includes a ringer circuit, a DTMF generating circuit, and a voice transmission / reception circuit, and the state detection unit includes the status signals of the basic telephone circuit unit and the hook states of the branch telephones. Detect DTMF signals, etc. In addition, by using the Internet together with the public telephone network, voice data is transmitted to / received from the public telephone network. Therefore, the present invention can solve the problem that the connection rate is lowered due to disconnection of the busy signal, and can further improve the call quality. In addition, it is easy to install and control the functions of the phone in the program of the PC, as well as providing a set of command control codes, there is an effect to easily build an automation system suitable for the function and purpose.

Description

Multi-function phone using internet and public telephone network {MULTI-FUNCTION TELEPHONE USED BY INTERNET AND PSTN}

The present invention relates to a telephone that performs a complex function, and in particular, by using the Internet and a public payphone network simultaneously with a PC to improve call quality and connection rate, and to provide various functions and contents to meet the Internet age. The present invention relates to a multifunctional telephone using the Internet and a public telephone network, which is expected as a next generation communication system.

As society is diversified and diversified, the convenience of life is constantly being sought, and the development of technology makes this demand possible. In particular, the telephone, which is in charge of one axis of the communication field, has been established as an important means of communication in all offices and homes, starting from the initial manual and developing into computer and information communication technology.

1 is a view for explaining a telephone system using a conventional PC.

As shown, the conventional telephone system includes a communication modem 11 for connecting to the Internet 20, and a sound card 12 for controlling voice input and output through the communication modem 11, respectively. 10 '). On the programs in the PCs 10 and 10 ', respective drivers for the recognition of the modem 11 and the sound card 12 had to be installed.

In a conventional telephone system using such a PC, a voice call, that is, a phone call, is connected to the Internet 20 after one PC 10 is connected to the Internet 20 through the attached modem 11. This was possible by transmitting voice data of another PC 10 'with Internet contents.

In addition, the call between the PC 10 and the general telephone 50 has an Internet telephone service server 30 connected to the Internet 20, and the Internet telephone service server 30 is connected to a public telephone network (PSTN) to make a voice. It was possible by sending data to each other. In this communication, an internal / external modem and a LAN card were used, and in general, it was connected to a serial communication port of a PC.

However, the conventional telephone systems as described above have the following problems.

In other words, since a telephone call is made through the Internet, the Internet content and voice signals must be transmitted together on the Internet. Therefore, there have been many problems such as poor call quality due to the phenomena of the internet data (traffic). In addition, when using a modem for a telephone call, the conventional modem has to be located inside the computer (ISA slot or PCI slot) to remove the case of the computer, and there is a difficulty in controlling the telephone system only before and after the call.

In addition, the conventional telephone call system using a PC had to be installed in a computer by providing a driver for device recognition. For this reason, there is an inconvenience of upgrading the operating system (hereinafter referred to as OS) or reinstalling the corresponding driver when an error occurs.

Accordingly, an object of the present invention is to solve the above problems, the Internet content in the PC with the Internet environment is transmitted and received through the Internet network, and the voice is transmitted and received through the public telephone network (PSTN), overcoming the disadvantages of sound quality The present invention provides a technology for a multi-function phone for voice call that enables high-quality transmission and reception of Internet content and phone calls at the same time.

In addition, another object of the present invention is to enable the miniaturization and low-cost production of the phone while providing a multi-function service, such as sending and receiving answering messages, telephone call history management, telephone number management and dialing, receiving using the functions of the computer It is to.

In addition, another object of the present invention is to receive and display the caller information on the multi-function phone and computer, to store and manage it in the computer, and to store and manage the dialed information to manage the call history from the computer.

In addition, another object of the present invention is to provide a phone with a codec unit to enable the sound input and output of the computer and the Internet phone function.

In addition, the present invention is to be able to connect the general telephones in parallel with the multi-function telephone, and to control the telephone by monitoring the status of the branch general telephones.

1 is a view for explaining a telephone system using a conventional PC.

Figure 2 is a connection state diagram of a multi-function phone and a PC according to an embodiment of the present invention.

3 is a detailed view of a multifunctional telephone using the Internet and a public telephone network according to an embodiment of the present invention.

4 is a detailed view showing an embodiment of the basic telephone circuit portion and the state detection portion of FIG.

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

100: PC

200: Multifunction Phone

201: keypad 202: LCD

203: communication port 204: telephone line port

205: branch phone port 206: headset port

207 power port

210: micom

220: basic telephone circuit

221: ringer circuit 222: hook switch

223 matching transformer 224 DTMF generation circuit

225: voice transmission and reception circuit

230: caller information receiving unit

240: state detection unit

241: first hook detection circuit 242: ring signal detection circuit

243: second hook detection circuit 245: DTMF detection circuit

246: third hook detection circuit

250: codec

260: power supply unit 261: AC adapter

270: communication unit 271: communication driver

280: display unit 281: LCD driver

290: memory

Multifunctional telephone using the Internet and public telephone network of the present invention for achieving the above object is made to be used in combination with the normal phone function and Internet phone function connected to the PC.

The hardware of the multifunction telephone includes: a basic telephone circuit portion including circuits for a telephone call through a telephone line of a PSTN, a keypad and voice input / output means, and providing a telephone call function and a voice input / output function;

A communication unit for communication connection between the multifunction telephone and the PC;

A caller information receiver for detecting caller information from the received signal of the basic telephone circuit portion;

A state detection unit for detecting a state of the basic telephone circuit unit, detecting a DTMF signal from a received signal, and detecting a state of branch telephones;

A codec unit for converting digital-analog data between the PC and the basic telephone circuit unit;

Control each of the components to perform a general telephone function to service a voice call through the PSTN network, or an Internet phone (VOIP) function to service a voice call through the Internet network connected to the PC, the PC and the telephone It controls the sound input / output function of the PC using the telephone by interfacing the sound data of the period, and transmits / receives mutual information with the PC to control the telephone call using the functions of the PC and various telephone function services. The program for controlling the phone functions is configured including the programmed microcomputer.

The PC connected to the multifunctional telephone of the present invention is provided with a telephone control program (telephone control module). The telephone control module includes a call / receive function, a caller information storage function, a latest call information storage function, an internet phone call connection function, an automatic answering message storage / transmission function, a message checking function via a telephone remotely, and a call. The telephone control program is configured to provide various telephone services, such as an email confirmation function and a telephone dialing function.

The present invention further includes a display means for displaying the caller information upon receiving it, and is configured to display the month, day and time through the display means in a standby state of the telephone.

The multifunction telephone is equipped with a handset port for connecting a conventional handset with voice input and output means, and ports for using a headset or earset.

The multifunction telephone further includes a branch telephone port for connecting a general telephone.

In addition, the microcomputer transmits the status information, the dial information, the received DTMF signal, the caller information, etc. of the multifunction phone to the PC so that the PC can be managed and controlled.

The apparatus may further include a memory for storing caller information and dialing information under the control of the microcomputer, and for transmitting the information to the PC when a communication connection with the PC is established.

In addition, it provides a set of command control codes to the multi-function phone and provides the functions interconnected with the phone control program of the PC. That is, the program written with this command control code can be used to control specific instruments and equipment.

The communication unit of the multifunction telephone may be configured to perform serial communication with the PC by using a serial communication port (RS-232C), and when the serial communication port is provided, a microphone connected to a sound card of the PC and A speaker port is provided.

The communication unit preferably uses a USB communication port, and the USB port includes a data communication line, a power line, and a sound card connection line.

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

2 is a connection state diagram of a multifunction telephone and a PC according to an embodiment of the present invention.

As shown, the multifunction telephone of the present embodiment can be used as a general telephone using a general public telephone network (PSTN), an Internet phone via the Internet through the network 120 of the PC 100, and the sound input / output of the PC 100. It can also be used as a device.

As shown, the multifunction telephone 200 of the present embodiment includes a keypad 201 for dialing and key input, and an LCD 202 for displaying caller's telephone number and time display of a clock function. It is included. In addition, a communication port 203 for connecting with the communication port 102 of the PC 100, a phone line port 204 for connecting the telephone line of the PSTN, and a branch phone port 205 for connecting with the branch telephone. And a headset port 206 for connecting to a headset and a power port 207 for receiving external power.

In this embodiment, the communication between the PC 100 and the multifunction telephone 200 is shown using a universal serial bus (USB) port, but a serial communication port may be used. The USB cable includes a plurality of data communication lines for transmitting and receiving telephone control data between the PC 100 and the multifunction telephone 200, a power line for supplying power to the multifunction telephone 200, and a PC. It includes a line of microphone input / speaker outputs for a sound card (not shown) in 100.

When using the serial communication port as a communication port, it is connected to the microphone / speaker port of the sound card in the PC 100 through a separate microphone / speaker port provided in the multifunction telephone 200.

3 is a detailed view of a multifunctional telephone using the Internet and a public telephone network according to an embodiment of the present invention.

Multifunction telephone 200 of the present invention is provided with a keypad 201 and LCD 202 on the outside, a communication port 203, telephone line port 204, branch telephone port 205, power port, handset port, And a headset port is provided. The internal circuit is largely a microcomputer 210, a basic telephone circuit unit 220, a caller information receiver 230, a state detector 240, a codec unit 250, a power supply unit 260, a communication unit 270, a display unit 280 And a memory 290.

4 is a detailed view of a basic telephone circuit section and a state detection section in the embodiment of FIG.

As shown in the drawing, the basic telephone circuit unit 220 detects a ring signal from a telephone line and rings a ringer circuit 221 and a call by controlling the hook button or the microcomputer 210 of the keypad 201. A hook switch 222 for selecting a connection, a matching transformer 223 for matching a signal through a telephone line, a DTMF generation circuit 224 for dialing, a voice transmission / reception circuit 225 for voice transmission and reception, And a handset or headset connected to the voice transmission / reception circuit 225.

In addition, the state detection unit 240, the first hook detection circuit 241 for detecting a hook state of the branch telephone (not shown) that can be connected to the front end of the multi-function phone, the ring signal of the basic telephone circuit unit 220 A ring signal detection circuit 242 for detecting a signal, a second hook detection circuit 243 for detecting a hook state of the hook switch 222, and a DTMF detection circuit for detecting DTMF signals transmitted and received through the matching transformer 223. 245, and a third hook detection circuit 246 for detecting a hook state of a general telephone connected to the branch telephone port 205.

Here, the signal wiring of FIG. 3 and FIG. 4 is a schematic representation, and the detailed configuration of the circuit design and the signal wiring for realizing the functions of the respective components are omitted. For example, the hook switch 222 is a switch directly controlled by the hook button of the keypad 201 and the switch controlled by the microcomputer 210 is installed in parallel, even if the user does not operate the hook button, the microcomputer 210 automatically It is configured to control the hookswitch, and it is omitted in the description of the present invention because it is easy for those skilled in the art to configure the circuit to perform these functions.

Hereinafter, the function and operation of each component according to the present embodiment will be described in detail with reference to FIGS. 2, 3, and 4.

The keypad (KEY PAD) 201 includes buttons for dialing and function buttons such as a hook button and a flash button. By using these various buttons, the user dials and inputs various control commands. The flash button is used as a call hold function for handing over a phone call to another branch phone. The branch telephone port 205 is a port that can use an external branch telephone that is additionally connected to the trunk line. Therefore, the multifunction telephone of the present embodiment can be used by connecting a telephone other than the trunk line.

The basic telephone circuit unit 220 is composed of circuits connected to the telephone line of the PSTN to realize a general charge call, which is a function of transmitting and receiving voice and information through the telephone line control telephone line under the control of the microcomputer 210. Will be performed.

The caller information receiver 230 analyzes caller information from the call reception signal and transmits it to the microcomputer 210.

The state detector 240 detects various state signals of the basic telephone circuit unit 220, detects hook states of branch phones, and detects DTMF signals received through a telephone line to input state information to the microcomputer 210. To perform.

The coder 250 converts the digital data from the PC 100 and the analog data of the multifunction telephone 200 into each other. Therefore, it is possible to input sound (voice) and sound output of the PC to the PC, and by using the PC, it is possible to perform auto answering, voice recognition, and Internet phone functions.

The power supply unit 260 supplies power to the components, and includes an AC adapter 261 to connect to a power source applied from the outside.

The communication unit 270 includes a communication driver 271 and a communication port 203 for communication with the PC 100. This is a component for exchanging data between the PC 100 and the multifunction telephone 200, and enables the transmission and reception of telephone state control data and various voice messages. In the embodiment, the communication port 202 uses a USB port.

In addition, the display unit 280 is composed of an LCD driver 281 and the LCD 203, and displays the received caller information and status when the call state changes, and displays useful information such as operation status, clock, calendar, etc. do.

The memory 290 stores telephone call information (eg, caller information and dialing information) when the PC 100 is in an off state, and when the PC 100 is connected to the PC 100, the memory 290 of the memory 290 is stored. The information is transmitted to the PC 100 so that the PC 100 can manage it.

The microcomputer 210 that performs the core functions of the multifunction telephone 200 includes various transmission / reception states and the like to control each component according to the operation of the keypad 202 or the control of the PC 100 and maintain a good call. Monitor the overall condition of the multifunction phone 100. In addition, the state of the phone is transmitted to the PC 100 connected through the communication unit 270, and receives the control and operation status of the PC 100, and the like. Therefore, according to the communication control between the microcomputer 210 and the PC 100 of the multi-function phone 200, it is possible to perform the call control function directly through the PC (100).

In addition, an Internet phone (VOIP) function for providing a voice call through an internet network using the Internet function of the PC 100 is controlled, and a sound input / output function of the sound of the PC 100 is performed. ) Data interface between PC and phone for various services such as phone call control, automatic answering service, phone call history management function, phone call attempt on screen number, mail check, home automation control using phone, etc. And a program for controlling the telephone function.

The PC 100 connected with the multifunction telephone 200 of the present invention is provided with a telephone control program (telephone control module) 110. The call control program 110 includes a call making / receiving function, a caller information storing function, a latest calling information storing function, an Internet phone call connection function, an automatic answering message storing / transmitting function, a message checking function via a telephone remotely. The telephone control program is configured to provide various telephone services, such as an email confirmation function through a telephone and a telephone dialing by voice recognition.

The ringer circuit 221 of the basic telephone circuit unit 220 performs a function of ringing a charge bell by detecting a ring signal from a telephone.

The hook switch 221 includes a hook switch controlled by the hook button of the keypad 201 and a hook switch controlled by the microcomputer 210, and switches the call line to a state where a telephone call can be made.

The matching transformer 223 is a matching transformer found in a typical telephone circuit and a circuit thereof, and serves to match transmission and reception signals between the telephone line side and the inside of the telephone circuit.

The DTMF generating circuit 224 generates a dialing signal and a control code (key signal) as a DTMF signal at the time of making a call under the control of the keypad 201 or the PC 100 and transmits it to the telephone line.

The voice transmitter / receiver circuit 225 is responsible for processing voice signals transmitted and received between the matching transformer 223 and voice input / output means (eg, a handset, a headset, or a codec unit 250).

The voice transceiving circuit 225 may be connected to a conventional handset for performing voice input and output, or a speakerphone having one microphone (MIC) and one speaker. In addition, a headset (ear set) or a headset (e.g., a microphone) provided with a microphone (MIC) and a receiver (RCV) may be connected to make a call. In addition, it is equipped with a microphone and speaker port that can be connected to the sound card in the PC, so you can share various handsets.

The state detector 240 includes first to third hook detection circuits 241, 243, and 246, a ring signal detection circuit 242, and a DTMF detection circuit 245.

The first hook detection circuit 241 detects a hook state of a general telephone which is connected in parallel to the telephone line in front of the basic telephone circuit unit 220. The second hook detection circuit 243 detects a state of the hook switch 222 of the basic telephone circuit unit 220. The third hook detection circuit 246 detects a hook state of the branch telephone connected to the branch telephone port 205.

The ring signal detection circuit 242 detects a ring signal of the ringer circuit 221.

The DTMF detection circuit 245 then detects a DTMF signal received through the telephone line. This is to detect the key signal when making a call from a remote site and inputting a control key. It also detects a DTMF signal generated when making a call from a telephone connected to the branch telephone port 205.

As described above, each state detection signal of the state detection unit 240 is input to the microcomputer 210, and the microcomputer 210 inputs the state information to the PC 100 so that the PC 100 drives the telephone control program and manages the information. And control can be performed.

The multifunction telephone 200 of this embodiment can be used in connection with other general telephones. In addition, the Internet environment is provided by being connected to the Internet through the network 120 of the PC 100 connected to the multifunction telephone 200. In addition, the multifunction telephone 200 is a phone including a function of some modems, it may be operated as a function independent of the telephone control program 110 to be described later. At the same time, by providing a set of command control codes that can control the multi-function phone 200 provides a function associated with the telephone control program. That is, the program written with this command control code can be used to control specific instruments and equipment. Therefore, it is possible to build a home automation (HA) system that performs a control by dialing the PC 100 equipped with the multifunction telephone 200 at a remote location.

The PC 100 connected to the multifunction telephone is provided with a telephone control program 110 for controlling the multifunction telephone 200. The telephone control program 110 is operated without being influenced by the OS, unlike a normal driver. The telephone control program 110 allows to make or receive calls by the telephone number module displayed on the screen. For example, when a user clicks on a phone number type data displayed on another browser, the data is interpreted as a phone number by automatic recognition and transmitted to the multifunction telephone 200 when it is recognized as a phone number. Determines this and controls to perform dialing. Therefore, when you click the phone number, you can dial automatically.

As such, the present invention allows the phone to be controlled from the program, thereby automatically connecting the phone without affecting the OS at all. In addition, the present invention is not only for the users using the PSTN network but also for Voice over Internet Protocol (VOIP) users who make calls using the Internet, it is possible to interface with a sound card.

In addition, the telephone control program 110 is designed to provide various moving or still image contents during a telephone call or a call interruption, which may help the Internet business and various business aspects. The content used here may be an advertisement or video of callers, and other necessary information.

<Answer call>

When a call is received through the telephone line of the PSTN from the outside, the ringer circuit 221 is operated to ring the telephone. At the same time, the ring signal detection circuit 242 detects the ring signal of the ringer circuit 221 and inputs it to the microcomputer 210. The microcomputer 210 transmits ring signal detection information to the PC 100, and the PC 100 displays the telephone control module on the screen by driving the telephone control program 110.

At this time, when the PSTN exchange transmits the caller information together with the ring signal, the caller information receiver 230 detects the caller information (Caller ID) and inputs it to the microcomputer 210, and the microcomputer 210 inputs the caller information to the PC ( 100 and is displayed on the LCD (280).

Accordingly, the user can view the caller information (phone number and subscriber name) displayed on the LCD 202 of the multi-function phone 200 and the screen of the PC 100 and decide to answer the call.

Subsequently, the user operates the hook through a handset or a headset connected to the voice transmission / reception circuit 225, or when the user clicks a call on the browser of the PC 100, the hook switch 222 connects the call path to enable the call. do.

Thereafter, when the call is terminated, the PC 100 stores and manages caller information.

If the user is absent or does not want to answer the call, since the microcomputer 210 transmits a ring signal to the PC 100, the PC 100 operates as an auto answer function to send an auto reply message and send a message of the other party. Save and perform auto answer function.

<Call phone>

Dialing can be done by using the keypad 201 of the multi-function telephone 200, by dialing the telephone number directly using the telephone control browser of the PC 100, using the speed dial function, or the telephone number of the PC 100. You can make a call by clicking on the phone number managed by the management function or by using a function of recognizing a sequence of numbers as a phone number on the general screen (a phone number recognition function of a PC; not shown). When making a call from a PC, the microcomputer 210 automatically controls the hook switch 222 to form a call path, and then generates a dialing signal. At this time, when dialing using the keypad 201, the dial information is transmitted to the microcomputer 100 so that the PC 100 manages the telephone number when making a call.

The microcomputer 210 dials by controlling the DTMF generation circuit 224 and transmits a call answer signal (ringback tone) of the other party to the PC 100 to report a call connection state.

<VOIP call>

In the telephone call using the Internet, the telephone control program of the PC 100 may select an Internet phone function, dial, or answer a call. At this time, the PC 100 connects the voice data received from the Internet to the multifunction phone 200 through the communication port 102, the microcomputer 210 is the microcomputer 210 to the codec unit 250 to the voice data By connecting, the codec unit 250 converts the analog voice signal into a handset, a headset, or a speakerphone function to make a voice call.

<Audio input and output function to PC>

When voice is input through a handset, a headset, or the like, the codec unit 250 converts the digital data, and the microcomputer 210 transmits the digital voice data to the PC 100. When the PC 100 outputs music or other sounds, the codec unit 250 of the multifunction phone 200 converts the digital signal into an analog signal, thereby acting as a sound card function of the PC 100.

The multifunction telephone 110 of the present embodiment can transmit / receive necessary data, for example, MP3 format sound data, using the USB port of the PC 100. Such communication may use a serial communication port (RS-232C) for serial communication. In addition, by connecting to a serial communication port or a USB port, it can be easily installed unlike other computer peripheral devices. In addition, during a phone call using the PC 100, the digital call data is input using a serial communication port or a USB communication port, converted into analog data, and then transferred to the microcomputer 210 to enable a voice call.

In addition, the PC 100 connected to the multifunction telephone 200 of the present embodiment may have various programs installed. Therefore, in addition to the hardware central set-top box function to perform a variety of software control to enable the multi-function phone 200 more versatile. For example, the PC 100 transmits a control code and an operation form corresponding to each specific program created by the code system of the present embodiment through the serial communication port (RS-232C) or the USB port to the multifunction telephone 200. , Multi-function phone 200 performs a variety of functions.

In addition, the present invention is possible to make a call according to various combinations between a telephone or a PC at a remote location, the multi-function telephone 200 or the PC 100 of the present embodiment. That is, it is possible to make a call with the multifunction telephone 200 and the remote phone or PC of the present embodiment, and also between the PC 100 connected to the multifunction telephone 200 and the remote phone or PC. In addition to this, the multifunction telephone 200 and the PC 100 may be used simultaneously during a call.

As described above, the present invention uses a combination of the Internet and a public telephone network, so that voice data is a public telephone network and image data is transmitted / received to the Internet network. Can be further improved. In addition, since it is installed externally by connecting to a serial communication port or a USB port of a PC, it is easy to install and the function of the phone can be controlled from the program of the PC so that it does not affect the OS at all.

In addition, the headset can be used as a voice input / output with the sound card of the PC, so there is no need to provide a dual headset for the phone and the sound card, and another phone can be connected in parallel. In addition, by providing a set of command control codes for interfacing with a program, there is an effect of easily constructing various automation systems suitable for functions and uses.

Claims (15)

This is a multifunctional phone that is connected to a PC so that you can use both regular phone functions and Internet phone functions together. The multifunction telephone, Circuits for telephone calls through a telephone line of the PSTN, a keypad and voice input / output means, and a basic telephone circuit unit for telephone calls and voice input / output; Communication means for communication connection between the multifunction telephone and a PC; Caller information receiving means for detecting caller information from the received signal of the basic telephone circuit portion; State detection means for detecting a state of the basic telephone circuit portion, detecting a DTMF signal from a received signal, and detecting a state of branch telephones; A codec for mutually converting digital-analog sound data between the PC and the basic telephone circuit portion; The state detection signal of the state detection means and the caller information of the caller information receiving means are transmitted to the PC through the communication means, and the call / dial control is performed by the key signal of the keypad or the control signal of the PC, A microcomputer controlling the components while performing a data interface with the microcomputer; Multifunctional telephone using the Internet and public telephone networks, characterized in that made. The method of claim 1, wherein the multifunction telephone, Multifunction telephone using the Internet and public telephone network, characterized in that it further comprises a display means for displaying this when the caller information received in the caller information receiving. The method of claim 2, wherein the multifunction telephone, A multifunction telephone using the Internet and a public telephone network, characterized in that the month, day and time are displayed through the display means in a standby state of the telephone. The method of claim 2 or 3, wherein the display means, And a liquid crystal display (LCD) controlled by the LCD driver and the LCD driver under the control of the microcomputer. The method of claim 1, wherein the multifunction telephone, The communication cable of the communication means further includes a power supply line for supplying the power of the PC to the telephone, Select one of the power of the PC supplied through the power line or the external power input through the AC adapter to be supplied to the operating power of the multi-function phone by the control of the microcomputer When the external power and the PC power is not input, the multi-function using the Internet and public telephone network, characterized in that the power unit further comprises a power control to use the power supply line power input through the telephone line as a basic power source cellphone. According to claim 1, The basic telephone circuit portion of the multifunction telephone, A ringer circuit for detecting a ring signal in the telephone line and ringing a telephone ring; A hook button of a keypad or a hook switch controlled by the micom; A matching transformer for matching a transmission / reception signal through the telephone line; A DTMF generating circuit for generating a key signal of the keypad and a dialing signal of a PC by the control of the microcomputer as a DTMF signal; A voice transmission / reception circuit for transmitting and receiving a voice signal through the matching transformer; A keypad with multiple keys for dialing, function buttons such as hook buttons, flash buttons, And a voice input / output means connected to the voice transmission / reception circuit for inputting / outputting voice. The method of claim 6, wherein the voice transmission and reception circuit, A multifunction telephone using the Internet and a public telephone network, characterized in that it has a microphone and a speaker port for connecting to the PC. The method of claim 6, wherein the voice input and output means, Multifunctional telephone using the Internet and a public telephone network, characterized in that used by connecting a conventional handset. The method of claim 6, wherein the voice input and output means, Multi-function telephone using the Internet and public telephone networks, characterized in that for connecting the headset (head set) provided with a microphone (MIC) and a receiver (RCV). The method of claim 6, wherein the multifunction telephone, It is further provided with a branch telephone port for connecting a general telephone in parallel with the basic telephone circuit, And the state detector detects a hook state of a telephone connected to the branch telephone port and inputs the hook state to the microcomputer. The method of claim 6, wherein the state detector of the multifunction telephone, A ring signal detection circuit for detecting a ring signal of the basic telephone circuit section; A DTMF detection circuit for detecting and applying a DTMF signal received from the basic telephone circuit unit to the microcomputer; A first hook detection circuit for detecting a hook state of the branch telephone connected to the front line of the trunk line port of the basic telephone circuit unit and applying the hook state to the microcomputer; A second hook detection circuit which detects a state of a hook switch of the basic charge circuit unit and inputs it to the microcomputer; And a third hook detection circuit configured to detect a hook state of the branch telephone connected to the branch telephone port of the multifunctional telephone and apply the micro hook to the microcomputer. The method of claim 1, wherein the communication means, Multi-function telephone using the Internet and public telephone network, characterized in that the serial communication with the PC using a serial communication port (RS-232C). The method of claim 1, wherein the communication means, A multifunction telephone using the Internet and a public telephone network, characterized in that to communicate with the PC using a USB communication port. The method of claim 1, wherein the microcomputer Store the command control code set, interpret the received DTMF signal, transmit the command control code to the PC, and control each component of the telephone by the control code of the PC; Multifunctional phone using the. The method of claim 1, wherein the multifunction telephone, Further comprising a memory for storing information under the control of the microcomputer, When the PC is in the off state, the microcomputer stores the caller reception information and the dialing information, and when the communication connection is made with the PC, transmits the information to the PC so that the PC can manage the Internet; Multifunctional telephone using public telephone network.