WO2001060041A1

WO2001060041A1 - Multi-function telephone used by internet and pstn

Info

Publication number: WO2001060041A1
Application number: PCT/KR2000/000955
Authority: WO
Inventors: Nam-Hoon Kim; Young-Seung Lee
Original assignee: Moneyphone Co., Ltd.
Priority date: 2000-02-14
Filing date: 2000-08-24
Publication date: 2001-08-16
Also published as: AU6737700A

Abstract

The present invention relates to a multifunction telephone using the internet and public telephone network presumed as the next communication system corresponding to the internet era which is capable of improving speech quality and connection success rate, providing multiple functions and various contents by using the internet and public telephone network at the same time by connecting to a PC (Personal Computer).

Description

MULTI-FUNCTION TELEPHONE USED BY INTERNET AND PSTN

TECHNICAL FIELD The present invention relates to a multifunction telephone, in particular to the multifunction telephone using the internet and public switching telephone network presumed as the next communication system corresponding to the internet era which is capable of improving a speech quality and a connection success rate, providing multiple functions and various contents by using the internet and public telephone switching network at the same time by being connected to a PC (Personal Computer).

BACKGROUND ART

Convenience of living is continually pursued according to differentiation and diversity of the modern society, and development of a technology makes possible the need. In particular, a telephone taking charge of one part of a communication field initially starts as a manual system, and is a major communication mean of all offices and homes in the present time by being developed by a computer technology and an information communication technology.

FIG.1 illustrates the conventional telephone system using a PC.

As depicted in FIG.1 , in the conventional telephone system, a communication modem 12 for connecting with the internet 20, and a sound card 11 for controlling a voice input/output through the communication modem 12 are comprised in each PC (personal computer) 10A, 10B. Each driver for recognizing the communication modem 12 and sound card 11 is installed on a program of the each PC 10A, 10B.

In the conventional telephone system using the PC, a voice call (telephone call) is performed by connecting the PC 10A to the internet 20 through the communication modem 12, and transmitting voice data of the other PC 10B connected to the internet 20 with internet contents.

In addition, in the communication between the PC 10A and an ordinary telephone 50, the telephone call is performed by connecting the internet telephone call service server 30 connected to the internet 20 to a PSTN (Public Switching Telephone Network), and transmitting the voice data each other. In the communication, a built-in/outer packaging modem and a LAN card are used, and generally they are connected to serial communication ports of the PC. However, the above-described conventional telephone system has below problems.

The telephone call is performed through the internet, and the voice signal has to be transmitted with the internet contents on the internet. Accordingly, the speech quality lowers due to a traffic of the internet data. In addition, when the telephone call is performed by using the modem, the conventional modem has to be installed inside of the PC (ISA slot or PCI slot) after taking off a case of the PC, and the telephone system has to be controlled only before and after the calling.

In addition, in the conventional telephone communication system using the PC, a driver for an equipment recognition has to be installed on the PC Accordingly, when an operating system (hereinafter referred to an OS) is upgraded or an error occurs, the pertinent driver has to be reinstalled

TECHNICAL GIST OF THE PESENT INVENTION

The object of the present invention is to provide a multifunction telephone using the internet and public switching telephone network which is capable of recovering defects of a speech quality and performing a transmission/reception of internet contents and a telephone call at the same time as the high speech quality by transmitting/receiving the internet contents through the internet network on a PC connected to the internet, and transmitting/receiving the telephone call through the PSTN (Public Switching Telephone Network)

The other object of the present invention is to provide the multifunction telephone which is capable of providing various services such as an answering message transmission/reception function, a dialing particular managing function, a telephone number storing function, a telephone calling/receiving function by using functions of the computer, and accomplishing miniaturization and low fabrication cost The other object of the present invention is to provide the multifunction telephone which is capable of receiving caller information, displaying the information on the multifunction telephone and computer, storing/managing it on the computer, storing/managing dialing information, and managing the dialing particular on the computer by using the functions of the computer The other object of the present invention is to provide the multifunction telephone which is capable of inputting/outputting sound of the computer, and performing the internet phone function by adding a codec unit to the telephone. The other object of the present invention is to provide the multifunction telephone which is capable of being parallel-connected to ordinary telephones, and controlling the branch telephones after checking the state of the branch telephones.

In order to achieve the above-mentioned objects, the multifunction telephone of the present invention comprises a basic telephone circuit unit for performing a telephone call function and a voice input/output function including circuits for performing the telephone call through the PSTN (Public Switching Telephone Network) line and a key pad and a voice input/output mean, a communication unit for connecting the multifunction telephone to the PC, a caller information reception unit for detecting the caller information from a reception signal of the basic telephone circuit unit, a state detecting unit for detecting the state of the basic telephone circuit unit, a DTMF signal from the reception signal, the state of the branch telephones, a codec unit for converting mutually digital/analog data between the PC and basic telephone circuit unit, and a microcomputer installed a data interface and telephone function control program for performing the ordinary telephone function servicing the voice communication through the PSTN by controlling the each construction part, the internet phone (VOIP) function servicing the voice communication through the internet network connected to the PC, the sound input/output function of the PC using the telephone by interfacing the sound data between the PC and telephone, the telephone call control and various service functions by transmitting/receiving the information to the PC.

A telephone control program (telephone control module) is installed on the PC connected to the multifunction telephone of the present invention. The telephone control module is constructed so as to perform various telephone services such as a telephone calling/receiving function, a caller information storing function, a redial function, an internet phone function, an answering message storing/transmitting function, a message checking function through an outside telephone, an e-mail checking function through the telephone, a telephone calling function by a voice recognition.

BRIEF DESCRIPTION OF DRAWINGS

FIG.1 illustrates the conventional telephone system using a PC. FIG.2 illustrates the connection state of a multifunction telephone and a PC according to the embodiment of the present invention.

FIG.3 is a block diagram illustrating a multifunction telephone using the internet and public switching telephone network according to the embodiment of the present invention. FIG.4 illustrates a basic telephone circuit unit and a state detecting unit of the embodiment of the present invention in FIG.3 in detail. MODES FOR CARRYING OUT THE PREFERRED EMBODIMENTS

Hereinafter, the embodiment of the present invention will now be described in detail with reference to accompanying drawings FIG 2 illustrates the connection state of a multifunction telephone and a PC according to the embodiment of the present invention

As depicted in FIG 2, the multifunction telephone of the present invention can be used as a general telephone using a PSTN (Public Switching Telephone Network), an internet phone connecting to the internet through a network 120 of a PC (Personal Computer) 100, and a sound input/output device of the PC 100

In other words, as depicted in FIG 2, the multifunction telephone 200 of the present invention comprises a key pad 201 for dialing and inputting key, and a LCD (Liquid Crystal Display) 202 for displaying a telephone number of a caller and a time In addition, the multifunction telephone 200 of the present invention further comprises a communication port 203 for connecting a communication port 102 of the PC 100, a telephone line port 204 for connecting the telephone line of the PSTN, a branch telephone port 205 for connecting a branch telephone, a head set port 206 for connecting a head set, and a power port 207 for being inputted an outside power

In the preferred embodiment of the present invention, a USB (Universal Serial Bus) port is used for communication between the PC 100 and multifunction telephone 200, however a serial communication port can be used also The USB cable comprises a plurality of data communication lines for transmitting/receiving telephone control data between the PC 100 and multifunction telephone 200, a power line for providing the power of the PC 100 to the multifunction telephone 200, and a microphone input/speaker output line for a sound card (not shown) inside of the PC 100. When the serial communication port is used as the communication port, it is connected to a microphone/speaker port of the sound card inside of the PC 100 through an additional microphone/speaker port formed on the multifunction telephone 200.

FIG.3 is a block diagram illustrating a multifunction telephone using the internet and public switching telephone network according to the embodiment of the present invention.

As depicted in FIG.3, the multifunction telephone 200 of the present invention comprises the key pad 201 and LCD (Liquid Crystal Display) 202 at outside, the communication port 203, the telephone line port 204, the branch telephone port 205, the power port, a transceiver port, and a headset port And, an internal circuit comprises a microcomputer 210, a basic telephone circuit unit 220, a caller information reception unit 230, a state detecting unit 240, a codec unit 250, a power unit 260, a communication unit 270, a display unit 280, and a memory unit 290. FIG.4 illustrates in detail a basic telephone circuit unit and a state detecting unit of the embodiment in FIG 3

As depicted in FIG 4, the basic telephone circuit unit 220 comprises a ringer circuit 221 for detecting a ringer signal from the telephone line and ringing a telephone bell, a hook switch 222 for selecting a telephone connection in accordance with a hook button of the key pad 201 or the control of the microcomputer 210, a matching transformer 223 for matching a signal passing through the telephone line, a DTMF (Dual-Tone Multi Frequency) generating circuit 224 for dialing, a voice transmission/reception circuit 225 for transmitting/receiving a voice, and a transceiver or a headset connected to the voice transmission/reception circuit 225.

In addition, the state detecting unit 240 comprises a first hook detecting circuit 241 for detecting the hook state of a branch telephone (not shown) connected to the front end of the multifunction telephone 200, a ring signal detecting circuit 242 for detecting the ring signal of the basic telephone circuit unit 220, a second hook detecting circuit 243 for detecting the hook state of the hook switch 222, a DTMF detecting circuit 244 for detecting the DTMF (Dual-Tone Multi Frequency) signal transmitted/received through the matching transformer 223, and a third hook detecting circuit 245 for detecting the hook state of the branch telephone connected to the branch telephone port 205.

Herein, FIG.3 and FIG.4 are schematic block diagrams illustrating the construction of the embodiment of the present invention, the detailed construction for accomplishing the function of the each construction part is abridged. For example, the hook switch 222 includes the parallel-installed switch directly controlled by the hook button of the key pad 201 and switch controlled by the microcomputer 210 in order to make the microcomputer 210 automatically control the hook switch when the user does not operate the hook button. Likewise, it can be easily performed, accordingly the detailed description will be abridged in the present invention.

Hereinafter, the function and operation of the each construction part of the present invention will now be described in detail with reference to accompanying drawings FIG.2, FIG.3 and FIG.4. First, the key pad 201 (dial set) comprises function buttons such as buttons for dialing, a hook button, and a flash button ect. A user performs dialing, and inputs various control order by using the buttons. The flash button is used for a communication hold function in order to make the telephone call on the other branch telephone. And, the branch telephone port 205 is for an external branch telephone connected additionally besides the internal branch lines. Accordingly, the multifunction telephone of the embodiment of the present invention also can be used by being connected to other telephones besides the branch telephones.

The basic telephone circuit unit 220 comprises circuits for performing the ordinary telephone call by being connected to the telephone line of the

PSTN, the circuits perform transmission/reception function of the voice and information through the telephone line in accordance with the control of the microcomputer 210.

The caller information reception unit 230 analyzes the caller information (caller ID) from the telephone reception signal, and transmits it to the microcomputer 210.

The state detecting unit 240 detects the various state signal of the basic telephone circuit unit 220, detects the hook state of the branch telephones and the DTMF signal received through the telephone line, and inputs the state information to the microcomputer 210.

The codec (Coder-Decoder, CODEC) 250 converts mutually the digital data from the PC 100 and analog data from the multifunction telephone 200, accordingly it is possible to input/output the sound (voice) to the PC, and the PC can perform the answering function, voice recognition function, and internet phone function by using it.

The power unit 260 provides the power to the each construction part, and an AC adapter 261 is included in the power unit 260 in order to connect the power unit 260 to the power applied from the outside. The communication unit 270 comprises a communication driver 271 and a communication port 203 for communicating with the PC 100. It is for transmitting/receiving the data between the PC 100 and multifunction telephone 200, it makes possible the transmission/reception of the telephone state control data and the various voice messages Herein, the communication port 202 uses the USB port in the embodiment of the present invention

In addition, the display unit 280 comprises a LCD (Liquid crystal Display) driver 281 and a LCD 203, displays the state when the received caller information and communication state are changed, and displays the useful information such as the operation state, calendar, time, date in general

And, when the PC 100 is in the OFF state, the memory 290 stores the telephone call information (for example caller ID, dialing information), when the memory is connected to the PC 100, the memory 290 transmits the stored information to the PC 100, and the PC 100 manages the information The microcomputer 210 performing major functions of the multifunction telephone 200 controls the each part in accordance with operating of the key pad 202 or control of the PC 100, checks overall state of the multifunction telephone 100 including the various transmission/reception states in order to maintain speech quality. In addition, the microcomputer 210 transmits the state of the telephone to the PC 100 connected through the communication unit 270, and is inputted the control and operation state of the PC 100. Accordingly, the multifunction telephone can perform the telephone calling control function in accordance with the communication control between the microcomputer 210 and PC 100.

A data interfacing and function control program is installed in order to perform the internet phone function (VOIP) servicing the voice communication through the internet network connected to the PC 100, the sound input/output function of the PC 100, and to perform the telephone calling control, answering function, dialing particular managing function, dialing to a telephone number on the screen of the PC, e-mail checking function, home automation control using the telephone.

In the embodiment of the present invention, the telephone control program (telephone control module)103 is installed on the PC 100 connected to the multifunction telephone. The telephone control program 103 can perform various telephone services such as a telephone calling/receiving function, caller information storing function, redialing function, internet phone function, answering message storing/transmitting function, message checking function through the outside telephone, E-mail checking function through the telephone, calling function by the voice recognition

The ringer circuit 221 of the basic telephone circuit unit 220 detects the ring signal, and rings the telephone bell.

The hook switch 221 comprises the hook switch controlled by the hook button of the key pad 201 , the hook switch controlled by the microcomputer 210, and converts the communication line so as to perform the telephone calling

The matching transformer 223 is the conventional matching transformer and circuit, it matches the transmission/reception signal between the telephone line and telephone circuit.

The DTMF generation circuit 224 generates a dialing signal and control code (key signal) as the DTMF signal in accordance with the control of the key pad 201 or PC 100 when telephone calling is performed, and transmits it to the telephone line. And, the voice transmission/reception circuit 225 processes the voice signal transmitted/received between the matching transformer 223, voice input/out mean (transmitter/receiver or headset), or the codec unit 250

The conventional transceiver for performing input/out of the voice, or speaker phone including the microphone and speaker can be connected to the voice transmission/reception circuit 225. In addition, the headset including the microphone and receiver or an earset can be connected to the voice transmission/reception circuit 225. In addition, the voice transmission/reception circuit 225 includes the microphone and speaker port connectable to the sound card of the PC, accordingly the various tranceivers can be connected.

The state detecting unit 240 comprises the first hook detecting circuit 241 , second hook detecting circuit 243, third hook detecting circuit 245, ring signal detecting circuit 242, and the DTMF detecting circuit 244. 5 The first hook detecting circuit 241 connected to the front end of the multifunction telephone 200 detects the hook state of the branch telephone parallel-connected to the telephone line.

The second hook detecting circuit 243 detects the hook state of the hook switch 222. o The third hook detecting circuit 245 detects the hook state of the general telephone connected to the branch telephone port 205.

The ring signal detecting circuit 242 detects the ring signal of the ringer circuit 221.

The DTMF detecting circuit 244 detects the DTMF (Dual-Tone Multi 5 Frequency) signal received through the telephone line in order to detect the key signal when the telephone calling is performed at the outside and the control key is inputted.

In addition, the DTMF detecting circuit 244 detects the DTMF signal generated when the telephone calling is performed by using the telephone o connected to the branch telephone port 205.

The each state detecting signal of the state detecting unit 240 is inputted to the microcomputer 210. The microcomputer 210 inputs the inputted state information to the PC 100 in order to make the PC 100 perform operation of the telephone control program. The multifunction telephone 200 of the present invention is connected to the other ordinary telephone, and is connected to the internet through the network 120 of the PC 100 connected to the multifunction telephone 200. In addition, the multifunction telephone 200 has the some function of the modem, it can be independently operated apart from the telephone control program 103. At the same time, an instruction control code aggregate for controlling the multifunction telephone 200 may be provided in order to perform the function mutually linked with the telephone control program. In other words, a certain equipment can be controlled by using the program made with the instruction control code. Accordingly, a HA (Home Automation) system performed by making a telephone call from outside to the PC 100 connected to the multifunction telephone 200 can be implemented.

The telephone control program 103 is installed in the PC 100 in order to control the multifunction telephone 200. The telephone control program 103 independently operates apart from the OS (Operating System) different from the conventional driver.

The telephone control program 103 calls/receives telephone by the telephone number module displayed on the screen. For example, when the user clicks the telephone number data displayed on the other brouser, the data is analyzed by the automatic recognition whether it is the telephone number, when it is recognized as the telephone number, the data is transmitted to the multifunction telephone 200, and the microcomputer 210 performs the dialing by judging the data. Accordingly, when the telephone number is clicked, the dialing is performed automatically. As described above, the present invention can automatically connect the telephone without influencing to the OS by controlling the telephone on the program. In addition, the present invention can communicate with the

VOIP (Voice Over Internet Protocol) user as well as the PSTN network user by interfacing with the sound card.

In addition, the telephone control program 103 is designed to provide various contents of moving picture or still picture, it can help internet business and promotion. Herein, advertisement or images of the caller, additional information can be made as the contents. Hereinafter, the operation for receiving the telephone will now be described in detail.

First, when the telephone call is received through the telephone line of the PSTN, the telephone bell rings by the operation of the ringer circuit 221. At the same time, the ring signal detecting circuit 242 detects the ring signal of the ringer circuit 221, and inputs it to the microcomputer 210. The microcomputer 210 transmits the ring signal detecting information to the PC 100, the PC 100 displays the telephone control module on the screen by the operation of the telephone control program 103.

Herein, when the caller information is transmitted with the ring signal from the PSTN exchanger, the caller information reception unit 230 detects the caller ID and inputs it to the microcomputer 210, the microcomputer 210 transmits the caller information to the PC 100 and displays it on the LCD 280.

According to this, the user can watch the caller information (telephone number and subscriber name) displayed on the screen of the PC 100 and the LCD 202 of the multifunction telephone 200, accordingly the user can determine telephone receiving after showing the caller information.

And, when the user operates the hook through the tranceiver or headset connected to the voice transmission/reception circuit 225 or the user clicks the telephone receiving on the brouser, the hook switch 222 connects the communication path, accordingly the telephone receiving is performed.

After that, when the communication ends, the PC 100 stores and manages the caller information.

When the user is not in the house or does not want to communicate, the PC 100 is operated as the answering function such as the answering message transmission, a message storing from the caller because the microcomputer 210 transmits the ring signal to the PC 100.

Hereinafter, the operation for calling telephone will now be described in detail. First, the user uses the key pad 201 of the multifunction telephone

200, or inputs the telephone number by using the telephone control brouser of the PC 100 in order to call the telephone. Besides, the user can use the memory dial function, click the telephone number managed by the telephone number management of the PC 100, or use the telephone number recognition function of the PC (not shown) on the screen in order to make the telephone call.

When the user makes the telephone call on the PC, the microcomputer 210 automatically controls the hook switch 222 and forms the communication path, and generates the dialing signal. Herein, the user dials with the key pad 201 , the dialing information is transmitted to the microcomputer 100, and the PC 100 manages the telephone number dialing.

The microcomputer 210 performs dialing by controlling the DTMF generation circuit 224, and transmits a ring back tone of the other party to the PC 100, and reports the communication connection state.

Hereinafter, the operation for communication through the VOIP (Voice Over Internet Protocol) will now be described in detail.

First, the telephone calling through the internet can be performed after selecting the internet phone function on the telephone control program of the PC 100. Herein, the PC 100 transmits the voice data received from the internet to the multifunction telephone 200 through the communication port 102, the multifunction telephone 200 connects the voice data of the microcomputer to the codec unit 250, the codec unit 250 converts it into the analog voice signal, accordingly the voice communication is performed by using the headset or speaker phone function.

Hereinafter, the operation of the voice input/output to the PC and output function will now be described in detail.

First, when the voice is inputted through the trasceiver or head set, the codec unit 250 converts the voice signal into the digital voice data, and the microcomputer 210 transmits the digital voice data to the PC 100. And, when the music or sound of the PC 100 is transmitted, the codec unit 250 of the multifunction telephone 200 performs the sound card function of the PC 100 by converting the digital signal into the analog signal.

The multifunction telephone 200 of the embodiment of the present invention transmits/receives the needed data by using the USB port of the PC 100. For example, the MP3 type sound data can be transmitted/received. It is possible to use a serial communication port (RS-232C) for a serial communication. 5 In addition, the multifunction telephone 200 can be easily installed by connecting to the serial communication port or USB port different from the conventional computer appliances. In addition, when the telephone calling is performed by using the PC 100, the digital communication data is inputted by using the serial communication port or USB communication port, is converted o into the analog data, and is transmitted to the microcomputer 210, accordingly the voice communication is performed.

In addition, various programs are installed on the PC 100 connected to the multifunction telephone 200 of the embodiment of the present invention. Accordingly, the multifunction telephone 200 can be used more variably 5 because the PC 100 can control/perform functions of the software programs besides the central set-top box function. For example, the PC 100 transmits the control code and operation type corresponding to the each program programmed by the code type of the embodiment of the present invention through the serial communication port RS-232C or USB port, the multifunction o telephone 200 performs the various functions.

In addition, the telephone calling can be performed by combining the outside telephone or PC with the multifunction telephone of the present invention 200, or the PC 100. In other words, the telephone communication between the multifunction telephone of the present invention 200 and the outside telephone or PC is possible, the telephone communication between the PC 100 connected to the multifunction telephone 200 and the outside telephone or PC is possible. In addition, the multifunction telephone 200 and PC 100 can be used at the same time when the telephone communication is performed.

INDUSTRIAL APPLICABILITY

As described above, the embodiment of the present invention is capable of solving the connection success rate lowering problem due to signal disconnection during the communication, and improving the speech quality by using the internet and PSTN together and transmitting/receiving the image data through the internet network and transmitting/receiving the voice data through the PSTN.

In addition, the multifunction telephone is easily installed as the outer packaging by being connected to the serial communication port or USB port of the PC, and can control the functions of the telephone on the program of the PC, accordingly the multifunction telephone does not affect the OS at all. In addition, the multifunction telephone performs voice input/output of the sound card of the PC through the head set, accordingly there is no need to prepare the headset for the telephone and sound card, and the other telephone can be used by being parallel-connected to the multifunction telephone.

In addition, the various automation system corresponding to the various function and purpose can be easily implemented by providing the instruction control code aggregate for interfacing with the program.

Claims

1. A multifunction telephone using the internet and public switching telephone network which is capable of performing both the internet phone function and ordinary telephone function by being connected to a PC (Personal Computer), comprising : a basic telephone circuit unit for performing a telephone call function and a voice input/output function by being connected to circuits for performing the telephone call through the PSTN (Public Switching Telephone Network) line, and a key pad and a voice input/output mean ; a communication mean for connecting the multifunction telephone to the PC ; a caller information reception mean for detecting the caller information from a reception signal of the basic telephone circuit unit ; a state detecting mean for detecting the state of the basic telephone circuit unit, a DTMF signal from the reception signal, and the state of branch telephones ; a codec unit for converting mutually digital/analog data between the PC and basic telephone circuit unit ; and a microcomputer for transmitting a state detecting signal of the state detecting mean and the caller information of the caller information reception mean to the PC through the communication mean, controlling a telephone receiving/calling in accordance with a key signal of the key pad or a control signal of the PC, controlling the each construction part while performing data interfacing with the PC.

2. The apparatus according to claim 1 , wherein the multifunction telephone further comprises a display mean for displaying caller information

5 after detecting the caller information from the caller information reception mean.

3. The apparatus according to claim 2, wherein the multifunction telephone is characterized by displaying a month, a date, and time by using o the display mean in standby state.

4. The apparatus according to claim 2 or 3, wherein the display mean comprises a LCD (Liquid Crystal Display) driver controlled by the microcomputer, and a LCD (Liquid Crystal Display) controlled by the LCD 5 driver.

5. The apparatus according to claim 1 , wherein the multifunction telephone further comprises : a power line for providing a PC power to a communication cable of the 0 communication mean ; and a power unit for providing a power to the multifunction telephone after selecting the power among the PC power provided through the power line or an outside power provided through an AC adapter in accordance with the control of the microcomputer, and providing a telephone line power provided through a telephone line to the multifunction telephone when the PC power and outside power are not provided

6. The apparatus according to claim 1 , wherein the basic telephone circuit unit comprises : a ringer circuit for ringing a telephone bell after detecting a linger signal from the telephone line ; a hook switch controlled by a hook button of the key pad or the microcomputer ; a matching transformer for matching a transmission/reception signal passing through the telephone line ; a DTMF (Dual-Tone Multi Frequency) generating circuit for generating a key signal of the key pad and a dialing signal of the PC in accordance with the control of the microcomputer as a DTMF signal ; a voice transmission/reception circuit for transmitting/receiving a voice through the matching transformer ; a key pad including a plurality of keys for dialing, and function buttons such as a hook button, a flash button ; and a voice input/output mean for inputtiπg/outputting a voice by being connected to the voice transmission/reception circuit.

7. The apparatus according to claim 6, wherein the voice transmission/reception circuit comprises a microphone and a speaker port to be connected to the PC.

8. The apparatus according to claim 6, wherein the voice input/output mean is characterized by using the conventional receiver/transmitter.

9. The apparatus according to claim 6, wherein the voice input/output mean is characterized by using a headset having a microphone and a receiver.

10. The apparatus according to claim 6, wherein the multifunction telephone is characterized by further comprising a branch telephone port for parallel-connecting an ordinary telephone to the basic telephone circuit unit, detecting the hook state of the telephone connected to the branch telephone port in the state detecting unit, and inputting it to the microcomputer.

11. The apparatus according to claim 6, wherein the state detecting unit comprises : a ring signal detecting circuit for detecting the ring signal of the basic telephone circuit unit ; a DTMF detecting circuit for detecting the DTMF (Dual-Tone Multi

Frequency) signal received from the basic telephone circuit unit and applying it to the microcomputer ; a first hook detecting circuit for detecting the hook state of a branch

telephone parallel-connected to a telephone line port connected to the front end of the basic telephone circuit unit and applying it to the microcomputer ; a second hook detecting circuit for detecting the hook state of the hook switch of the basic telephone circuit unit and applying it to the microcomputer ; and 5 a third hook detecting circuit for detecting the hook state of the branch telephone connected to the branch telephone port of the multifunction telephone and applying it to the microcomputer.

12. The apparatus according to claim 1 , wherein the communication o mean is characterized by performing serial-communication with the PC by using the serial communication port (RS-232C).

13. The apparatus according to claim 1 , wherein the communication mean is characterized by performing communication with the PC by using the 5 USB communication port.

14. The apparatus according to claim 1 , wherein the microcomputer is characterized by storing a instruction control code aggregate, transmitting the instruction control code to the PC after analyzing the received DTMF 0 signal, and controlling the each construction part of the multifunction telephone in accordance with a control code of the PC.

15. The apparatus according to claim 1 , wherein the multifunction telephone is characterized by storing the caller reception information and dialing information on a memory in accordance with the control of the microcomputer when the PC is in off state, and transmitting the reception information and dialing information to the PC and managing the information on the PC in communication connection state with the PC.