KR100681337B1 - Computer Controlled Multifunction Phone - Google Patents

Abstract

The present invention discloses a multifunctional telephone which can be controlled by a computer. The multifunction telephone of the present invention can be freely switched between the handset and the headset, and the mobile phone call can be performed using the handset and the headset connected to the multifunction telephone. In addition, the contents of the call and the contents of the mobile phone call may be stored in the external computer using the handset or the handset, and the background music input from the computer or the previously recorded call contents may be listened to together with the counterpart of the call. The multifunction telephone of the present invention includes a setting signal input unit, a sensing unit, a control unit, a voice signal processing unit, and a switching unit. The setting signal input unit generates a setting signal according to the key value input from the user, the sensing unit generates a call state signal, the control unit generates a control signal according to the input setting signal, and the switching unit generates a voice from the trunk line telephone network according to the control signal. The voice signal received through the signal processor is output to the headset or the handset, and the voice signal input from the headset or the handset is output to the trunk line telephone network through the voice signal processor.

Description

Multi-functional teletphone with computer control

1 is a diagram illustrating a usage environment of a multifunctional telephone according to a preferred embodiment of the present invention.

2 is a view showing the appearance of a multifunctional telephone according to a preferred embodiment of the present invention.

3 is a block diagram showing an internal configuration of a multifunctional telephone according to a preferred embodiment of the present invention.

Fig. 4 is a diagram showing an example of the execution of a soft phone executed in a computer according to the preferred embodiment of the present invention.

The present invention relates to a telephone. Specifically, the present invention relates to a multifunctional telephone having a handset and a headset, and capable of recording a call.

In general, a multi-function phone is a phone configured for multi-purpose convenience by adding a caller ID (CID) function to track a caller's phone number and an automatic response message recording function in addition to the phone's original function. Such multifunctional telephones are widely used in offices and homes. Recently, the range of their use is increasing with the construction of home automation systems that remotely control home appliances.

In addition, recently, telephones that can use a handset and a headset are sold for a user who performs many telephone calls, such as a telemarketer, and a telephone capable of recording a call is also sold. Also, in recent years, an internet telephone that can make a call using the Internet network has started a service.

However, such a conventional handset and a telephone capable of using a headset together, for a call that has already been set up, must select either a headset or a handset to conduct a call, and cannot be freely switched between the headset and the handset during a call. There was discomfort.

In addition, the conventional multifunction telephone is capable of automatically dialing only a small number of phone numbers stored in the phone, and in case of having to perform a plurality of phone calls such as a telemarketer, it is inconvenient to manually enter a phone number.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and the technical problem to be achieved by the present invention is to provide a multifunctional telephone capable of freely switching headset calls and handset calls after establishment.

Another technical problem to be achieved by the present invention is to provide a multifunctional telephone that can connect to a mobile phone to perform a mobile phone call with a handset or a headset provided in the phone and record the contents of the mobile phone call.

Another object of the present invention is to provide a multifunctional telephone capable of automatically dialing a large number of telephone numbers recorded on a computer.

The multifunctional telephone of the present invention for achieving the above technical problem is a multifunctional telephone having a handset and a headset, connected to a mobile phone, and controlled by an external computer connected thereto, the telephone comprising a sensing unit, a setting signal input unit, and a voice signal processing unit. And a control unit, and a switching unit, wherein the voice signal processing unit processes and outputs the first voice signal received from the trunk line telephone network and the second voice signal transmitted to the trunk line telephone network, and the switching unit is configured to the first control signal input from the controller. Accordingly, the first voice signal input from the voice signal processor is output to the handset or the headset, the second voice signal is received from the handset or the headset and output to the voice signal processor, and the third voice signal input from the mobile phone to the handset or the headset. 4th sound output and input from headset or handset The voice signal is output to the mobile phone, and the sensing unit detects the state of the hook switch of the handset and the headset, generates a call state signal indicating the handset call state and the headset call state and outputs it to the control unit, and the setting signal input unit is input from the user. Outputting the first setting signal corresponding to the set key value to the control unit, requesting the control unit to change between the handset call state and the headset call state, or requesting the control unit to perform a mobile phone call with the handset or the headset, and the control unit calls state A first control signal for controlling the switching unit is generated according to the signal and the first setting signal and output to the switching unit.

In addition, the above-mentioned multifunction telephone further includes a PC interface unit for amplifying the first to fourth voice signals inputted from the switching unit and outputting the first to fourth voice signals to the external computer so as to record the first to fourth voice signals to the external computer. It is preferable.

In addition, the above-described multifunction telephone further includes a PC interface unit for attenuating and outputting a predetermined sound signal input from an external computer to the switching unit, wherein the switching unit outputs the sound signal according to the first control signal, the voice signal processor, the headset, the handset, And output to at least one of a mobile phone.

In addition, the above-described multifunction telephone further includes an interface unit for amplifying or attenuating the first to fourth voice signals, performing noise filtering, and outputting the mixed voice signals and the first voice signals to a headset or a handset. Preferably, the sound signal may be a background music signal reproduced by an external computer, or may be a content of a call recorded in an external computer.

In addition, the above-described multifunction telephone receives a call state signal from a sensing unit, establishes a call received from a trunk line telephone network or disconnects an established call according to the call state signal, and sets up a call to transmit a dialing signal to the trunk line telephone network. The call setting unit may further include a second control signal output from the control unit when the first setting signal indicates a change request between the handset call state and the headset call state, so that the established call may be established even if the call state signal is changed. Preferably, the call state signal indicates whether the hook switch of the handset or the headset is in the off hook state.

In addition, the above-described multifunction telephone further includes a dialing unit for generating a dialing signal according to a key value input from a user and outputting the dialing signal to a call setting unit, and the control unit includes a predetermined telephone number and a second setting signal which is a dialing request signal to the telephone number. Is received from an external computer, generates a third control signal for generating a dialing signal for the telephone number and outputs it to the call setting unit, and outputs it to the dialing unit together with the telephone number, and the dialing unit dials the telephone number as the receiving number. It is desirable to generate and transmit it to the trunk line telephone network.

Hereinafter, a multifunction telephone 100 according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a view illustrating a usage environment of the multifunction telephone 100 according to a preferred embodiment of the present invention. 1, the multifunction telephone 100 of the present invention is connected to the PSTN network, the headset 200 is connected to the handset 500, the external computer 400 and the mobile communication terminal (mobile phone; 300) Connected with

The multifunction telephone 100 of the present invention may receive setting information such as a dialing request to a specific telephone number from the external computer 400 and perform dialing on the corresponding telephone number, the handset 500, the headset 200, And transmits a voice signal to the external computer 400 so that the contents of the call through the mobile phone 300 can be recorded.

2 is a view showing the appearance of the multi-function phone 100 according to a preferred embodiment of the present invention. Referring to FIG. 2, in the configuration of a general telephone, a USB port for communicating with an external computer 400, a headset connection 220 (headset jack) for connecting with the headset 200, and a mobile phone 300 for connecting The mobile phone connection unit 230 further includes a mobile phone jack.

In addition, the multifunction telephone 100 of the present invention is a liquid crystal display 240 for displaying a dialed telephone number or the other party's telephone number and time, a keypad 250 for inputting a telephone number, and a handset call and a headset. Special keys 260 for inputting a setting signal including a setting signal for switching a call.

3 is a block diagram showing an internal configuration of the multifunction telephone 100 according to the preferred embodiment of the present invention. Multifunction telephone 100 of the present invention, the call setting unit 110, the sensing unit 120, the voice signal processing unit 130, the control unit 160, the switching unit 140, the interface unit 150, dialing unit 170 ), A setting signal input unit 180, a PC interface 195, and a USB interface 190. The interface unit 150 also includes a headset interface unit 152, a handset interface unit 154, and a mobile phone interface unit 156.

The call setting unit 110 establishes or disconnects a call according to the state of a hook switch associated with the handset 500 or the headset 200 when a call signal is received from a trunk line telephone network (PSTN network), and when a user makes a call, A dialing signal generated by the dialing unit 170 is transmitted to a trunk line telephone network to perform a call.

The detector 120 detects a state of the hook switch. Specifically, when a call signal is received, the phone rings through a speaker (not shown) built into the phone or through the headset 200. When the user lifts the handset 500 or presses a call connection button attached to the headset 200, the detector 120 detects that the state of the hook switch of the device 200 of the headset 200 or the handset 500 is changed. It detects whether the change has been made, and generates call state information on which device a call is currently made and outputs it to the controller 160. The same is true when the user presses the call button of the headset 200 or lifts the handset 500 to make a call.

The voice signal processing unit 130 changes the waveform of the voice signal received from the trunk line telephone network and performs noise filtering so that the user can listen to it through the headset 200 or the handset 500, and then performs noise filtering. 200 or handset 500. In addition, the voice signal inputted from the handset 500 or the headset 200 through the switching unit 140 is transformed into a waveform suitable for transmission to the trunk line telephone network, and noise is removed so that the call setting unit ( Output to 110).

The setting signal input unit 180 is composed of special keys provided in the telephone, and generates a first setting signal according to the special key value input by the user and outputs the first setting signal to the controller 160. The first setting signal mainly requests the control unit 160 to generate a control signal for controlling the switching unit 140 to change the call state between the handset 500 and the headset 200, or the mobile phone 300 calls the handset. The signal is a request for the controller 160 to generate a control signal for controlling the switching unit 140 to be performed through the 500 or the headset 200.

The control unit 160 switches the switching unit according to the first setting signal input from the setting signal input unit 180, the second setting signal input from the external computer 400, and the call state signal input from the sensing unit 120. A first control signal for controlling the 140, a second control signal for controlling the call setup unit 110, and a third control signal for controlling the dialing unit 170 are generated. In addition, the controller 160 generates mute signals and outputs them to the voice signal processor 130 to generate various control signals.

The switching unit 140 outputs the voice signal input from the voice signal processing unit 130 to the headset 200 or the handset 500 through the interface unit 150 according to the first control signal. In addition, the voice signal output from the handset 500 or the headset 200 and the voice signal input from the handset 500 or the headset 200 may be stored in the PC interface 195 to store the contents of the call in the external computer 400. Can be printed as

Meanwhile, the switching unit 140 receives a voice signal input from the mobile phone 300 according to the first control signal so that the mobile phone 300 can be called using the handset 500 or the headset 200. The headset 200 may output the voice signal input from the handset 500 or the headset 200 to the mobile phone 300. In addition, the switching unit 140 transmits the voice signal output from the mobile phone 300 and the voice signal input to the mobile phone 300 so that the mobile phone 300 can record the contents of the call on the external computer 400. It can be output to the external computer 400 through.

The PC interface 195 amplifies a voice signal input through the switching unit 140 from the headset 200, the handset 500, and the mobile phone 300 to record the conversation, and outputs it to the external computer 400. The attenuated sound signal input from the external computer 400 is output to the switching unit 140. At this time, the acoustic signal input from the external computer 400 to the PC interface 195 includes BGM music data played in the background during a call, and voice data recording existing call contents.

As described above, the interface unit 150 includes a headset interface unit 152, a handset interface unit 154, and a mobile phone 300 interface unit, and each interface unit 150 receives an input voice signal for each interface. Amplify or attenuate the form suitable for the equipment connected to the unit, perform noise filtering, and output it. In addition, the amplified or attenuated voice signal input from the connected device is subjected to noise filtering and output to the switching unit 140.

In addition, the interface unit 150 includes a voice signal input from the voice signal processor 130 or the mobile phone interface unit 156 through the switching unit 140 and a sound input from the external computer 400 through the switching unit 140. The signals are mixed and output to the handset 500 or the headset 200.

The USB interface 190 receives information on the current state of the multifunction telephone 100 from the control unit 160, converts it into a predetermined protocol (preferably, RS-232C), and transmits the converted information to an external computer 400. The second setting information and other information input from the external computer 400 are converted into a signal suitable for processing by the control unit 160 according to the protocol of.

When the user makes a phone call using the telephone, the dialing unit 170 generates a dialing signal according to a signal input through the keypad and outputs the dialing signal to the call setting unit 110. In addition, when the user selects one of a list of telephone numbers stored in the external computer 400, the dialing unit 170 receives the selected telephone number from the external computer 400 through the controller 160 and generates a dialing signal to make a call. Output to the setting unit 110.

Hereinafter, a process of performing a phone call using the multifunction telephone 100 of the present invention will be described with reference to FIGS. 2 and 3. When a call signal is received through the trunk line telephone network, a telephone bell rings to the speaker provided in the multifunction telephone 100 of the present invention and at the same time, the telephone bell rings to the connected headset 200.

When the user presses the call button of the headset 200 or picks up the handset 500 in order to answer the call, a loop is formed between the telephone and the switchboard of the trunk line telephone network, and the call setting unit 110 receives a voice signal input from the trunk line telephone network. The signal is output to the voice signal processor 130 through the detector 120. The detector 120 detects which of the hook switches connected to the handset 500 and the headset 200 is changed to the off hook state, and generates a call state signal indicating a device in an off hook state to generate a call state signal. Will output

The controller 160 generates a first control signal according to the first setting signal from the setting signal input unit 180, the second setting signal from the external computer 400, and the call state signal from the sensing unit 120. . When a call is received from the other party and the call state signal indicates that the hook switch of the headset 200 is changed to the off hook state, that is, when the call state indicates the headset 200 call state, the controller 160 causes the switching unit 140 to perform a call. A first control signal instructing to output the input voice signal to the headset interface unit 152 is generated.

When the call state signal indicates that the hook switch state of the handset 500 is changed to off hook, that is, when the call state indicates the handset 500 call, the controller 160 causes the switching unit 140 to transmit a voice signal to the handset interface unit 154. Generates a first control signal instructing to output to the output to the switching unit 140.

Meanwhile, as described above, the voice signal processor 130 changes the waveform of the voice signal and performs noise filtering so that the user can listen to the input voice signal through the headset 200 or the handset 500. The switching unit 140 outputs the voice signal input from the voice signal processing unit 130 according to the first control signal input from the controller 160. The headset interface unit 152 or the handset interface unit. 154, the handset interface 154 and the headset interface 152 amplify or attenuate the input voice signal to a corresponding device as described above, and perform noise filtering to perform the handset 500. Or output to the speaker of the headset 200.

In addition, the handset interface unit 154 or the headset interface unit 152 attenuates or amplifies the voice signal input from the microphone of the handset 500 or the headset 200 and performs noise filtering to output the switching unit 140. The switching unit 140 outputs the input voice signal to the voice signal processing unit 130.

As described above, the voice signal processing unit 130 performs noise filtering on the voice signal, changes the waveform into a waveform suitable for transmission to the trunk line telephone network, and outputs it to the call setting unit 110. The call setting unit 110 The voice signal is transmitted to the trunk line telephone network while maintaining a call state.

On the other hand, in the above-described embodiment, the process of switching to the headset 200 in the middle of the call to the handset 500, when the user picks up the handset 500 to receive the received call, the call is established, the voice signal Is delivered to the user through the speaker of the handset 500 through the above-described process.

When the user wants to change the call device to the headset 200 while talking on the handset 500, when the user presses the hold button shown in FIG. 2, the setting signal input unit 180 receives a hold button signal. The control unit 160 outputs a first setting signal for receiving a call request to switch the call state.

The control unit 160 outputs the first control signal to the switching unit 140 to instruct the switching unit 140 to output the voice signal input from the voice signal processing unit 130 to the headset interface unit 152 according to the first setting signal. On the other hand, when the user puts down the handset 500 and the hook switch of the handset 500 is changed to the on-hook state, the second control signal instructing to maintain the call state is output to the call setting unit 110.

By the above-described process, the user can put down the handset 500 that was used for the call and continue the call using the headset 200.

The user who has been talking on the headset 200 using the handset 500 may continue the call. The voice signal output from the switching unit 140 to the headset interface 152 may be transmitted to the handset interface unit 154. The process is the same as the above except that it is output. However, in this case, when the user who is talking on the headset 200 lifts the handset 500 and the hook switch state of the handset 500 is changed to the off hook state without pressing a separate hold button, the detection unit 120 Detects this, changes the call state signal, and outputs it to the controller 160, and the controller 160 outputs the voice signal input from the voice signal processor 130 to the handset interface unit 154 according to the changed call state signal. It may be configured to generate a first control signal indicating the output to the switching unit 140.

On the other hand, the multi-function phone 100 according to a preferred embodiment of the present invention is connected to the mobile phone 300, the mobile phone 300 can be carried out using the handset 500 of the phone or the headset 200 connected to the phone Can be. Specifically, when a call is received by the mobile phone 300 connected to the multifunction phone 100 and the call of the mobile phone 300 is established, the user lifts the handset 500 or presses the call button of the headset 200 and then the keypad. Press the mobile phone call button.

The setting signal input unit 180 receives a mobile phone call button signal and controls the first setting signal requesting to output a voice signal input from the mobile phone 300 to the headset 200 or the handset 500. Will output Meanwhile, the detector 120 outputs a call state signal indicating to which controller the hook switch state of which device is changed, that is, whether the hook switch of the device is in the off-hook state, to the controller 160.

The controller 160 generates a first control signal according to the call state signal and the first setting signal and outputs the first control signal to the switching unit 140. At this time, the first control signal causes the switching unit 140 to output the voice signal input from the mobile phone 300 to the headset interface unit 152 or the handset interface unit 154 in the off hook state indicated by the call state signal. As a control signal for instructing, the switching unit 140 receiving the first control signal outputs a voice signal input from the mobile phone 300 to the headset interface unit 152 or the handset interface unit 154, and inputs from them. By outputting the voice signal again to the mobile phone interface unit 156, the mobile phone call can be performed using the handset 500 or the headset 200.

Even when the mobile phone 300 calls are performed using the handset 500 or the headset 200, the call state may be changed between the handset 500 and the headset 200 according to the above-described process.

So far, the structure and operation of the multifunction phone 100 according to the present invention have been described. The operation of the multifunction telephone 100 to which the computer is connected according to another preferred embodiment of the present invention will be described below with reference to FIG. 4, which shows an example of the execution of a soft phone executed on a computer according to the present invention.

First, a process of recording the call content performed according to the above-described embodiment on the external computer 400 will be described. When the user wants to record the contents of the call in the form of an audio file that can be played on a computer, when the user runs the soft phone program of the present invention and clicks the contents of the call record item (not shown) in the environment setting item, the contents of the call are displayed. The second setting signal requesting to record the data is transmitted to the control unit 160 through the USB interface 190, and the control unit 160 generates the first control signal according to the call state signal and the second setting signal. Output to the switching unit 140.

The switching unit 140 receiving the first control signal includes an interface unit 150 corresponding to a device (headset 200 or handset 500) indicating the voice signal input from the voice signal processing unit 130. Output to the user, and transmit to the external computer 400 through the PC interface 195 so that the external computer 400 can record a voice signal received from the trunk line telephone network.

In addition, the switching unit 140 outputs the voice signal input from the headset interface unit 152 or the handset interface unit 154 to the voice signal processing unit 130 and transmits the voice signal to the call counterpart. Outputs to the external computer 400 through the PC interface 195 so that the user can record the contents of the call transmitted to the call counterpart, and the external computer 400 outputs a voice signal input through the PC interface 195 to a predetermined voice. Save as a file.

In addition, in the above-described embodiment, the process of recording the call content of the mobile phone 300 on the external computer 400 will be described. When the user wants to record the call content of the mobile phone 300 in the form of a voice file that can be played on the computer, The second set signal requesting to record the contents of the call by driving the soft phone program is transmitted to the controller 160 through the USB interface 190, and the controller 160 transmits the call state signal, the first and the first signal. The first control signal is generated according to the second setting signal and output to the switching unit 140.

The switching unit 140 receiving the first control signal has an interface unit 150 corresponding to a device (headset 200 or handset 500) in which the first control signal indicates the voice signal input from the mobile phone interface unit 156. On the other hand, it is transmitted to the external computer 400 through the PC interface 195 so that the external computer 400 can record and store the voice signal received from the mobile phone 300 interface.

In addition, the switching unit 140 outputs a voice signal of the user input from the headset interface unit 152 or the handset interface unit 154 to the mobile phone 300 through the mobile phone 300 interface, and transmits the same to the call counterpart. By using the handset 500 or the headset 200, the external computer 400 transmits the contents transmitted to the other party to the external computer 400 through the PC interface 195 so that the external computer 400 can record the contents. The voice signal received from the interface unit 152 or the handset interface unit 154 may be recorded and stored.

On the other hand, the multi-function phone 100 according to the preferred embodiment of the present invention can receive the sound signal reproduced from the external computer 400 can be inserted into the call content. Specifically, when a user wants to insert a predetermined sound signal (for example, background music, hereinafter referred to as "background music") during a phone call, a soft phone program is run to display a BGM item (not shown). If the user selects the music file to be played, the soft phone transmits a second setting signal indicating that the background music is to be heard during the call to the controller 160 through the USB interface 190 and plays the background music. An analog signal (hereinafter referred to as "background music signal") is transmitted to the PC interface 195. The PC interface 195 attenuates the received background music signal to a level suitable for processing by the multifunction telephone 100 of the present invention and outputs it to the switching unit 140.

 Meanwhile, the controller 160 receiving the second setting signal through the USB interface 190 generates a first control signal including the content, outputs the first control signal to the switching unit 140, and receives the first control signal. The unit 140 outputs the background music signal input to the PC interface 195 to the headset interface unit 152, the handset interface unit 154, or the mobile phone interface unit 156 according to the first control signal. do.

In addition, the switching unit 140 outputs the voice signal input from the interface unit 150 and the background music signal input from the PC interface 195 to the voice signal processing unit 130, and the voice signal processing unit 130 The voice signal and the background music signal are mixed and transmitted to the call counterpart.

In addition, when the mobile phone call is performed using the handset 500 or the headset 200, the switching unit 140 may input a voice signal input from the headset interface 152 or the handset interface 154 and the PC interface 195. The background music signal input from the mobile phone is output to the mobile phone interface unit 156, and the mobile phone interface unit 156 mixes the voice signal and the background music signal, amplifies or attenuates it to an appropriate volume, and outputs the call to the mobile phone 300. Background music can be inserted into the content.

In the preferred embodiment of the present invention described above, when the contents of the CO line call and the mobile phone 300 are recorded and stored in the external computer 400, the background music is inserted into the call contents in the same manner as before. Those skilled in the art will readily appreciate that the recorded call can be played back and then spoken to the other party.

On the other hand, the multifunction telephone 100 according to the preferred embodiment of the present invention can be controlled using an external computer 400. Specifically, after driving the soft phone program in the external computer 400, and selects a function such as automatic dialing, handset 500 and headset 200 switching, call recording, redial, etc., the external computer 400 is a USB interface The phone may be controlled by generating a control signal by outputting a second setting signal to the controller 160 of the multifunction phone 100 through the 190.

For example, after registering a large number of telephone numbers in the external computer 400, when dialing the registered telephone number sequentially, the external computer 400 selects one of the stored telephone numbers through the USB interface 190. The controller 160 transmits a phone number and a second setting signal requesting to make a call to the corresponding phone number.

The controller 160 generates a third control signal instructing to generate a dialing signal using the inputted telephone number as a reception number according to the inputted second setting signal, and then dials the inputted telephone number and the third control signal. Output to unit 170. The dialing unit 170 generates a dialing signal corresponding to the input telephone number according to the third control signal, outputs the dialing signal to the call setting unit 110, and the call setting unit 110 transmits the dialing signal to the trunk line telephone network. In addition, another process of making a call using a soft phone running on the external computer 400, a user inputs a phone number by clicking on a dial pad displayed on the soft phone instead of a previously stored phone number, and inputs the entered phone number. It is the same as the above-described process except that it is transmitted through the USB interface 190.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

As described above, the multi-function telephone of the present invention can be freely exchanged between the handset and the headset during a call, thereby increasing the convenience of use.

In addition, the multifunction telephone of the present invention can be controlled using a connected external computer. Therefore, when calling a number of phone numbers, by registering the phone number in the computer in advance and sequentially output the phone number to the multi-function phone, there is an effect that can make a call without error to a plurality of phone numbers, when the phone call It is effective to record a large amount of call contents by transmitting voice signal input from CO line or mobile phone and voice signal output from CO line phone or mobile phone to computer, and it can play sound from computer. By outputting to the voice signal during the call, it is possible to insert a variety of sound and background music during the call.

Claims (10)

A multifunctional telephone having a handset and a headset, connected to a mobile phone and controlled by a connected external computer, The telephone includes a sensing unit, a setting signal input unit, a voice signal processing unit, a control unit, a switching unit, an interface unit, and a PC interface unit. The voice signal processor may signal-process and output a first voice signal received from a trunk line telephone network and a second voice signal transmitted to the trunk line telephone network, The switching unit outputs the first voice signal input from the voice signal processing unit to the handset or the headset according to a first control signal input from the controller through the interface unit, and outputs the second voice signal to the handset or headset. Receiving from the voice signal processor and outputting the third voice signal input from the mobile phone to the handset or the headset, and outputting the fourth voice signal input from the headset or handset to the mobile phone, The detection unit detects the state of the hook switch of the handset and the headset, generates a call state signal indicating whether the handset call state and the headset call state, and outputs to the control unit, The set signal input unit outputs a first set signal corresponding to a key value input from a user to the controller, requesting the controller to change between the handset call state and the headset call state, or making a mobile phone call to the handset or the headset. Request the controller to perform the The controller generates the first control signal for controlling the switching unit according to the call state signal and the first setting signal and outputs the first control signal to the switching unit, The PC interface unit amplifies and outputs the first to fourth voice signals inputted from the switching unit to the external computer so that the first to fourth voice signals can be recorded on the external computer. The interface unit amplifies or attenuates the first voice signal to the fourth voice signal, performs noise filtering, and outputs the noise. The interface unit mixes a predetermined sound signal input from the external computer with the first voice signal. Multifunctional telephone, characterized in that output to the handset. delete The method of claim 1, The PC interface unit attenuates the sound signal and outputs the sound signal to the switching unit, and the switching unit outputs the sound signal to at least one of the voice signal processing unit, a headset, a handset, and a mobile phone according to the first control signal. Multifunction Phone. delete  The method of claim 1, wherein the sound signal And a background music signal reproduced by the external computer. The method of claim 1, wherein the sound signal Multifunctional telephone, characterized in that the call recorded on the external computer. The method of claim 1, Receiving a call state signal from the sensing unit, establishing a call received from a trunk line telephone network according to the call state signal or disconnecting an established call, and further comprising a call setting unit for transmitting a dialing signal to the trunk line telephone network; , The call setting unit receives a second control signal output from the control unit when the first setting signal indicates a change request between the handset call state and the headset call state, and establishes a call established even if the call state signal is changed. Multifunction telephone, characterized in that to hold. 8. The communication system of claim 7, wherein the call status signal is And the hook switch of either the handset or the headset is in an off hook state. The method of claim 7, wherein And a dialing unit for generating the dialing signal according to a key value input from a user and outputting the dialing signal to the call setting unit. The method of claim 9, The control unit receives a predetermined telephone number and a second setting signal, which is a dialing request signal to the telephone number, from the external computer, generates a dialing signal for the telephone number, and instructs to output to the call setting unit; Generates a signal and outputs it to the dialing unit together with the telephone number; And the dialing unit generates a dialing signal using the telephone number as a reception number and transmits the dialing signal to the trunk line telephone network.

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