KR20020028503A - Cross Connecting Controller of General Phone and Internet Phone - Google Patents

Abstract

PURPOSE: A telephone connection apparatus having both a generic phone function and an Internet phone function is provided to use one abbreviated key both as the abbreviated key of an Internet phone and the abbreviated key of a generic phone by utilizing the functions of the Internet phone and the functions of a computer, as well as the functions of the generic phone, to a maximum using one generic phone. CONSTITUTION: A telephone connection apparatus having both a generic phone function and an Internet phone function consists of a ring detector(5), a relay(3), a transformer(4), an input/output splitting circuit(9), a sound card input front-end mix circuit(14), an echo cancellation part(15), an analog switch, a dial signal detector(6), a telephone input circuit(12), a telephone output circuit(10), a telephone handset circuit(7), a speaker phone circuit(8), a headphone input/output circuit(13), and a microcomputer(16). The ring detector(5) detects a call signal through a generic telephone line(2). The relay(3), connected to the end of the ring detector(5), switches on or off the line(2). The transformer(4) has an electrical insulation function. The input/output splitting circuit(9) separates the input/output signal of the telephone line(2). The sound card input front-end mix circuit(14) mixes the input of the telephone line(2) with the input of the generic telephone and transfers it to the line input terminal of a sound card. The echo cancellation part(15) cancels the echo of an inputted or outputted signal. The analog switch(S), connected between the input/output terminals of the sound card and the input/output splitting circuit(9), controls circuit connection. The dial signal detector(6) detects a dial signal inputted through the telephone line(2) and the input/output splitting circuit(9). The telephone input/output circuits(12,10) mixes telephone input/output signals through the analog switch. The telephone handset circuit(7), connected to the telephone input/output circuits(12,10), is connected with a telephone handset(22). The speaker phone circuit(8), connected to the telephone input/output circuits(12,10), is connected with a speaker phone(23,24). The headphone input/output circuit(13), connected to the telephone input/output circuits(12,10), is connected with a headphone set(25). The microcomputer(16) controls the relay(3), detects a ring signal, controls the input/output of the sound card, receives a user's key input, and outputs it through a display.

Description

Cross connecting controller of general phone and internet phone

The present invention relates to a telephone connection device having a combined function of a general telephone and an internet telephone. More particularly, the present invention relates to a telephone connection apparatus having a combined function of a general telephone and an internet telephone that can simultaneously realize a general trunk line call and an internet call. It is about.

In general, an internet phone that can make a phone call through the Internet can make a phone call regardless of distance because it makes a phone call after connecting to the Internet using a dedicated line or a local telephone line. In other words, overseas internet phone bills are very cheap compared to overseas phone bills using regular telephones.

However, since the Internet phone can be used only with a computer, it is not easy to use it at home or office where the Internet can be accessed.

Therefore, in order to make long-distance calls or overseas calls in places where the Internet access environment is not provided, there is a problem in that the economic burden is increased because a large amount of call charges must be paid.

In addition, although there are conventional telephones for a network that can be used as an ordinary telephone with a single telephone and can be switched to an internet telephone, and a telephone connection device that can be used by switching between a regular telephone and an internet telephone using a regular telephone, He had a problem that he could not make multi-party calls at the same time.

Accordingly, the present invention has been made in view of the problems of the prior art, the object of which is to make full use of the functions of the Internet phone function and the computer as well as the general phone function by using a single phone, (1) one shortcut key It is also used as a shortcut for an internet phone, and also as a shortcut for a regular phone. (2) allow others to make other Internet calls while they are using the Internet phone from outside; (3) support the extension exchange function of the keyphone system; (4) Notify you that you have a phone call during an internet phone call, temporarily suspend the Internet phone call and allow the user to continue to make an Internet phone call or to make a phone call at the same time while making an internet phone call. To realize a multi-party call which simultaneously realizes a call and a trunk line call; (5) notify the user of a landline or landline call while listening to music, and allow them to receive a call while listening to music; (6) It notifies you that an internet call has been made even during a local telephone call, and withholds the telephone line and allows the telephone line to continue after the telephone call or to make both a telephone call and an internet telephone at the same time. Make it possible to realize a multi-party call that simultaneously implements a trunk line call; (7) Notifies you that another Internet call has been made during an Internet call, and allows you to hold an active Internet call and continue to make an Internet call or receive a call with another Internet call at the same time. To; (8) make it possible to support various telephone states by voice without hearing number key sounds made of DTMF; (9) provide a computer answering machine function; (10) To provide a telephone connection device having a combined function of a regular telephone and an internet telephone, which makes it unnecessary to hear a number key sound in using a speaker phone.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram illustrating the configuration of a telephone connection device having a combined function of a general telephone and an internet telephone according to the present invention.

2 is a circuit diagram for explaining an embodiment of the present invention.

3 is an exemplary view of a telephone according to the present invention.

Explanation of symbols on the main parts of the drawings

1: PSTN switch 2: telephone line

3: relay 4: transformer for power disconnection

5: ring detector 6: dial signal detection IC

7: telephone handset circuit diagram 8: speaker phone circuit

9 telephone line input and output separation circuit 10 telephone output mix circuit

11: Dial Signal Detection IC Shear Mix Circuit

12 telephone input mix circuit 13 headphone input and output circuit

14: sound card input shear mix circuit

15: echo cancellation IC16: microcomputer

17: LCD 18: LED

19: keyboard 20: micom

21 hook switch 22 handset

23: speaker 24: microphone for speaker phone

25: headphone with microphone 26: headphone jack

27: headphone jack switch 28: EEPROM

In order to achieve the above object, the present invention provides a ring detector for detecting a call signal through a general telephone line; A relay connected to a rear end of the ring detector to turn on / off a line; A transformer having an electrical insulation function connected to a rear end of the relay; A general telephone line input / output separation circuit connected to the transformer and separating input / output signals of the telephone line; A sound card input front end mix circuit for mixing the input of the normal telephone line and the input of the ordinary telephone to be mixed to be delivered to the line input terminal of the sound card; An echo canceling unit connected between the telephone line input / output separation circuit and an input / output terminal of the sound card to cancel echoes of signals input and output; An analog switch connected between the input / output terminal of the sound card and the general telephone line input / output separation circuit to control the circuit connection; A dial signal detector for detecting a dial signal input through a telephone line through the telephone line input / output separation circuit; A telephone input / output circuit for mixing telephone input / output signals through the analog switch; A telephone handset circuit connected to the telephone input / output circuit for inputting / outputting to a telephone handset; A speaker phone circuit connected to the telephone input / output circuit for inputting / outputting a speaker phone; A headphone input / output circuit connected to the telephone input / output circuit for inputting / outputting to a headphone set; Control the relay through a relay driver, detects a ring signal, controls the input and output of the sound card, and receives a key input of the user and the general telephone and the Internet comprising a control unit for outputting the operation status through the display Provided is a telephone connection device having a combined function of a telephone.

As described above, in the present invention, it is possible to make a local telephone call during an internet telephone call, to make an internet telephone call during a local telephone call, and to realize a multi-party telephone call by simultaneously using an internet telephone and a local telephone call, and to use a computer. It can be used as a telephone answering machine and provides various functions to check e-mails, messages, etc. that have come into the computer from a regular phone from outside.

(Example)

Hereinafter, with reference to the accompanying drawings showing a preferred embodiment of the present invention described above in more detail.

1 is a block diagram illustrating a configuration of a telephone connection device having a combined function of a general telephone and an internet telephone according to the present invention, FIG. 2 is a circuit diagram for explaining an embodiment of the present invention, and FIG. An illustration of a telephone according to the invention.

A telephone connection device having a combined function of a regular telephone and an internet telephone according to the present invention, as shown in Fig. 1, includes: a ring detector 5 for detecting a call signal through a telephone line; A relay (3, Relay1) connected to a rear end of the ring detector (5) to turn on / off a line; A transformer (4) connected to a rear end of the relay and having an electrical insulation function; A general telephone line input / output separation circuit (9) connected to the transformer (4) for separating input / output signals of the telephone line (2); A sound card input front end mix circuit 14 for mixing the input of the ordinary telephone line 2 with the input of the ordinary telephone to be mixed so as to be delivered to the line input terminal of the sound card; An echo canceling unit 15 connected between the telephone line input / output separation circuit 9 and an input / output terminal of the sound card to cancel echoes of signals input and output; An analog switch (S) connected between the input / output terminal of the sound card and the general telephone line input / output separation circuit 9 to control the circuit connection; A dial signal detector (6) for detecting a dial signal input through the telephone line through the telephone line input / output separation circuit (9); Telephone input / output circuits (10, 12) for mixing telephone input / output signals through the analog switch; A telephone handset circuit (7) connected to the telephone input / output circuits (10, 12) for inputting / outputting the telephone handset (22); A speaker phone circuit (8) connected to the telephone input / output circuit for inputting and outputting to speaker phones (23, 24); A headphone input / output circuit (13) connected to the telephone input / output circuit for inputting / outputting to the headphone set (25); Control unit (microcom) 16 to control the relay (3), detect the ring signal, control the input and output of the sound card, and receives the user's key input and output the operation status through the display (LED, LCD) do.

Each telephone connection device having a combined function of a general telephone and an internet telephone according to the present invention is configured for each of the following functions.

1. Connection between telephone line and computer sound card input / output

(1) The ordinary telephone line (2), the ring detector (5), the relay (Relay1), the resistor R10 (or can also be configured as a capacitor and other circuits), the transformer (4), the resistors R1, R2, R3, R4 Connect the telephone line input / output separation circuit (9) consisting of R5, R6, R7, R8, R9, and op amps OP1, OP2, OP3, and OP4.

(2) Then, a mix consisting of resistors R36, R37, R38, and op amp OP5, which mixes the input of the telephone line and the input of the telephone and mixes them to be transmitted to the right line input terminal of the sound card via the echo cancellation IC 15. The circuit 14 is constituted.

(3) The analog switches S1-1 and S1-2 are provided between the sound card input / output terminal including the mixer circuit 14 and the echo cancellation IC 15 and the telephone line input / output separation circuit 9.

(4) Connect the general telephone line with the computer so that you can use the Internet phone through the computer from outside and listen to various messages stored in the computer.

2. Connection between the phone and the sound card input and output terminals of the computer.

One). Control your phone's microphone, speakers, handsets, and headphones.

(1) Resistor R11, R12, R13, R14, R15 and op amps OP8, OP10, telephone handset 22, hook switch 21 which is turned on / off in conjunction with handset, handset circuit 7 with analog switch S6, When listening to music on headphones with S7 installed, the handset does not output and does not accept input.

(2) An analog switch S8, S9 is installed in a normal speaker phone circuit (8) composed of resistors R16, R17, R18, R19 and the op amps OP11, OP12, the speaker 23, and the microphone 24, so that music can be listened to by headphones. When listening, make sure the handset doesn't output and doesn't accept input.

(3) Configure the input and output terminals of the headphone 25 with a microphone with resistors R25, R26, R27, R28, R29, R30, R31, R32, R33, R34, R35, and op amps OP13, OP14, OP15, and OP16. The analog switch S10, S11 is installed between the telephone output mix circuit 10, the telephone input mix circuit 12, and the headphone input / output circuit 13 so that a local line telephone or an internet telephone can be received even while listening to music through headphones. The user can make a telephone call or internet phone call through the headphones, and the analog switches S5-1 and S5-2 are installed between the sound card line output and the headphone input / output circuit (13) to make a phone call with the headphones. If not, try to listen to normal music.

2). Connect phone to computer I / O.

(1) configure a telephone output mix 10 consisting of resistors R39, R40, R41, R42, R43, op amp OP43,

(2) configure a telephone input mix (12) consisting of resistors R45, R46, R47, R48, R49, op amp OP7,

(3) Connect the handset circuit (7), the speaker phone circuit (8), and the output of the headphone input / output circuit (13) to the telephone input mix (12), and the handset circuit (7), speaker phone circuit (8), and headphone input and output. Connect the input of the circuit 13 to the phone output mix 10,

(4) An analog switch S3-1 or S3-2 is provided between the telephone output mix circuit 10 and the mix circuit 14 connected to the output of the echo canceling IC 15 and the input of the echo canceling IC so that a handset or a speakerphone is provided. Allows you to make Internet phone calls in mode or headphones.

3. Connect phone and trunk line.

(1) An analog switch S2-1 or S2-2 is provided between the telephone output mix circuit 10, the telephone input mix circuit 12, and the telephone line input / output separation circuit 9 to make a phone call while making an internet call. To be able.

4. Use the internet phone with a telephone when the trunk line and the internet are busy.

An analog switch S4-1, S4-2 is provided between the telephone output mix circuit 10, the telephone input mix circuit 12, and the telephone line input / output separation circuit 9 so that someone outside can connect the sound card through the telephone line. When making an internet call using the RIGHT input / output terminal of the RIGHT, the handset of the telephone, the speaker phone mode, and the headphone allow the user to make an Internet telephone call through the left input / output terminal of the sound card.

5. Notification of CO line call during internet call.

Connect the output of the ring detector 5 to the microcomputer input, detect the ring signal transmitted when the telephone line comes to the telephone line, and transmit it to the microcomputer so that various functions performed when the telephone line comes to the microcomputer are performed. It communicates via OUT7, which is connected to the sound card's MIDI input, to let you know that a call is received even during an internet call using the handset, speaker phone mode, and headphones.

In the telephone having the above configuration (see Fig. 3),

1) When a call comes from outside

The ring detector 5 transmits the ring signal to the IN5 of the micom, the micom turns on the S8 and S10 switches, and outputs the ring sound through the microcomputer A-OUT1 to the speaker 23 through the R43 OP6 S8 on contact R16 OP11. On the other hand, the sound is output from the OP6 to the headphones through the on contact R25 OP16 R24 OP14 of S10, and the ON / OFF LED of the PHONE key is on to indicate that the CO line is on.

That is, when a call is received from the outside, the LED above the PHONE key of FIG. 3 turns ON / OFF and outputs a “phone is present” or ring sound or music through headphones and speakers.

The music output is output from the sound card, which is output via the analog switch S3-1, the output mix circuit 10, the analog switch S8, and the speaker phone circuit 8.

(1) When you talk on the telephone by handset

When the handset is lifted and the hook switch 21 interlocked with the handset is turned on, it detects that the input of the microcomputer IN16 goes from high to low, and the analog switches S6, S7, S2-1, S2-2, and the telephone line input / output disconnect circuit. (9) Turn on the relay (RELAY1) so that you can talk on the handset.

(2) When making a call in speakerphone mode

When the speaker phone switch of the keyboard is turned on, the speaker phone switch on the keyboard is transferred to the microcomputer through the IN-KEY input terminal of the microcomputer. When the microcomputer is switched off, the microcomputer switches S6 and S7 off and the analog switches S8, S9, S2-1, S2-2, Turn on the relay (RELAY1) to enable speaker phone mode.

(3) When talking in headphone mode

When the PHONE key on the keyboard is turned on, the PHONE key is transferred to the microcomputer through the IN-KEY input terminal of the microcomputer, and the microcomputer calls the headphones by turning on the analog switches S10, S11, S2-1, S2-2 and relay (RELAY1). To do this.

2). When you call outside

After pressing the PHONE key on the keyboard (repeatedly pressing the PHONE LED on / off), enter the phone number using the telephone number keys (1,2,3 ,,,,,), and press the ENTER key. Turn on the switch S2-1, S2-2 and the relay (RELAY1), and output the DTMF signal corresponding to the input key through A-OUT2. Until then, no signal is sent through the handset or the speaker.

When the DTMF signal is output, the microcomputer receives A-IN through the resistor R24 and detects that the telephone signal is going through the telephone line. When the other party answers the call, the call is stopped and the microcomputer detects this signal and outputs a sound such as "Phone is connected" or "Ding dong ~" through A-OUT1 to indicate that the call was made.

(1) When calling by handset

When the handset is lifted, the hook switch 21 is turned on and the microcomputer detects this and turns on the analog switches S6 and S7 so that the handset can be talked to.

(2) When making a call in speakerphone mode

When the speaker phone switch on the keyboard is turned on, the speaker phone switch is transferred to the microcomputer through the IN-KEY input terminal of the microcomputer, and the microcomputer enables the call in the speaker phone mode by turning on the analog switches S8 and S9.

(3) When making a call in headphone mode

If you turn on the PHONE key on the keyboard, the PHONE key is delivered to the microcomputer through the IN-KEY input terminal of the microcomputer, and the microcomputer turns on the analog switches S10 and S11 so that you can talk on the headphones. On the other hand, if you use a jack (27) with a switch to connect the jack of the headphone (jack connected to the op amp OP14, OP15 output terminal and the headphone jack), Micom detects the switch (27) of the jack Allows you to call in mode.

3). When making an internet call

After pressing INTERNET key on the keyboard and entering the phone number, MyCom will pass the value of this phone number to the MIDI input terminal of the sound card through OUT7, and the Internet software will connect to the IP where the computer corresponding to the phone number is connected to the Internet. Make an Internet call

In addition, the present invention 1) can be used as a shortcut key of the Internet phone as one shortcut key, and can also be used as a shortcut function of a general telephone.

(1) Execution of hot key when making a CO line call

The shortcut key on the phone example diagram of FIG. 3 is composed of several keys like the shortcut key on a conventional phone. Input the other party's IP address, phone number, etc. corresponding to the shortcut using the program as shown in FIG.

After inputting, press the save file button, save the file, click the send button, the shortcut input program sends the shortcut number and phone number to the sound card MIDI output terminal, and the microcomputer receives this data through IN7 and then the IN / Save data to EEPROM through OUT terminal.

When making a phone call, if the user presses the PHONE key on the keyboard (or when the LED is on the PHONE switch, i.e. in CO line mode), the microcomputer detects that the PHONE key has been entered through the IN-KEY terminal and the PHONE key. Turn on the LED, the relay (RELAY1), and the analog switches S2-1 and S2-2, and prepare to make a call in the trunk line mode. At this time, if you press the hotkey, Micom receives the number of the corresponding keyboard, brings the phone number stored in EEPROM, and sends the DTMF (dial) signal corresponding to the phone number to A-OUT2. The DTMF signal is amplified at the ratio of resistors R47 and R49 and output to the output of the op amp OP7. The signal is passed through the analog switch S2-1 to the resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, It is transmitted to the resistor R9 of the telephone line input / output separation circuit 9 composed of the op amps OP1, OP2, OP3, and OP4, and is amplified by the op amp OP2 at the ratio of the resistors R9 and R7 to the + terminal of the op amp OP1. Lose. If the-terminal of the operational amplifier OP1 is higher than the + terminal, the output of the OP1 becomes-, which lowers the voltage of the input terminal of the OP1. If the input terminal voltage falls below the + terminal voltage, the output of OP1 becomes + and the output of OP1 becomes +, and this + output raises the-terminal voltage of OP1 through resistor R1, and the-input terminal voltage becomes + input terminal voltage. To be equal to

The negative terminal voltage of OP1 is consequently equal to the voltage of the + input terminal of OP1. The output voltage of OP1 is amplified more than the voltage of OP1 terminal by the ratio of transformer 4, resistor R10 and telephone line impedance to resistance R1. In the normal voice band, the impedance of the transformer is several times different, and when the signal is sent from the output of OP2 directly through the resistor, the voltage delivered to the transformer is more than doubled between 500 Hz sound and 1 kHz sound. The output through is not desirable.

The dial signal thus transmitted is transmitted to the PSTN switch or the key phone switch via the resistor R10, the relay RELAY1, and the telephone line 2 to make a telephone call.

While the exchange calls the other party, the call sound comes through the relay (RELAY1), resistor R10 and the transformer, and this signal is transmitted to the -input terminal of the operational amplifier OP1. However, if the negative terminal voltage of OP1 is higher than the + terminal, the output of OP1 outputs-to decrease the negative terminal voltage through resistor R1.If the negative terminal voltage is lower than the + terminal voltage, the output of OP1 becomes + and resistor R1 is increased. Because the-terminal voltage is made equal to the + terminal voltage, the-terminal voltage of OP1 remains the same as the + terminal voltage, and-the output of OP1 is transferred from the telephone line so that the terminal voltage is equal to the + terminal voltage. The signal is amplified out of phase and output.

That is, it is inverted and amplified at the ratio of the input impedance of the transformer front end to the resistor R1. The signal is transmitted to the analog input of the microcomputer through the resistor R24. This input signal is detected to determine whether a call is being made or not. While you are making a call, you will hear a good sound through A-OUT1. Or, you can send a message like "I'm making a call." On the other hand, a message that a call is being made can be delivered to the software on the computer through the MIDI input terminal of the OUT7 and sound card, and the user can listen to various pleasant music or sounds provided by the received software while the call is made.

The software can output preset music or sound through the LINE RIGHT OUT port on the sound card during the call. The sound output from LINE OUT is set to listen to music or sound of computer while making a call through IN1 and OUT1 of the normal echo cancellation IC. The amplifier is inverted and amplified by the op amp OP6 at the ratio of the resistor R41 and the resistor R39.

1) When making a call with the handset, in the handset call mode, the analog switch S6 turned on by the microcomputer is inverted and amplified through the op amp OP8 at the ratio of the resistors R12 and R11 to be delivered to the output of the handset. You can hear the sound recorded on a good computer.

2) If you do not pick up the handset or the headphone is not connected to the jack, you can press the hotkey to control the phone to automatically call the speaker phone mode, and press the speakerphone switch on the keyboard of the phone to select the speaker phone mode, Check the speaker phone mode through the IN-KEY input terminal and turn on the analog switches S8 and S9. When making a phone call in speaker phone mode, the output of the op amp OP6 is inverted and amplified by the op amp OP11 at the ratio of resistors R16 and R17 via an analog switch S8 to be delivered to the speaker so that sound can be heard while making a call.

3) When the headphone jack 26 is connected, the headphone jack switch 27 is turned on and the microcomputer detects that the headphone jack is connected through IN25 and turns on the analog switches S10 and S11 to make a telephone call in the headphone mode. . Alternatively, when a call mode using a headphone is used in another agreed operation method, the microcomputer turns on the analog switches S10 and S11.

When making a phone call in headphone mode, the output of the op amp OP6 is inverted and amplified through the op amp OP16 at the ratio of R25 and R27 via the analog switch S10, and this signal is fed through the op amp OP14 at the ratio of resistors R29 and R30. It is inverted and amplified and output to the headphone RIGHT, and is inverted and amplified through the op amp OP15 at the ratio of resistances R32 and R33 to the headphone LEFT so that you can listen to good music or sound while making a call.

A more effective way is to turn on the analog switches S5-1 and S5-2 while dialing in the headphone mode to output stereo music or sound to the sound card LINE RIGHT, LEFT OUT, and this output is the analog switches S5-1 and S5. -2, Resistor R28, R30, R31, R33 The op amps can be inverted and amplified via the op amps OP14 and OP15 to the RIGHT and LEFT outputs of the headphones for stereo sound while on the phone.

As described above, while using a shortcut as a shortcut for a general telephone, it is possible to support various phone states by voice without hearing a key number sound composed of DTMF tones for detailed purposes.

In addition, the shortcut key input of the ordinary telephone is not enough keys and the display window is limited, so it is very difficult to enter or change the shortcut key. However, since the present invention changes or inputs the shortcut key using a program on a computer, it is stored in the EEPROM. The advantage is that the input is very convenient.

(2) When making an internet call using a shortcut key

When the INTERNET key is pressed on the keyboard of FIG. 3, the microcomputer detects that the INTERNET key of the keyboard is ON through the IN-KEY input terminal, turns on the analog switches S3-1 and S3-2, and sounds the Internet phone mode message through OUT7. Output to card MIDI input terminal. An Internet phone program on the computer analyzes the MIDI input signal from the sound card to prepare for an Internet mode phone call.

At this time, if you press a shortcut key, Micom receives which key on the keyboard is turned on through the IN-KEY input terminal and sends the corresponding key message to the computer, and the Internet phone software receives it and receives the IP contracted with the shortcut key ( IP) Internet phone call stored in the shortcut program of FIG.

Here, the Internet telephone call to be described is described when the PC TO PC Internet telephone system is used, and since the PC TO PC Internet telephone system is a normal Internet telephone system, description thereof is omitted. The PC TO PHONE type internet phone program is also supported through the PC TO PC internet phone program, and the description is omitted because only IP is fixed.

PC TO PC Internet telephony is supported when using the same internet telephony program. When a call answering call is made to the other party's IP, the internet telephony program on the other's computer answers.

Assuming that the computer on which this phone is installed is the other party's phone, when an Internet call is received, the Internet phone program on the computer receives it and sends a message to the microcomputer IN7 through the sound card's MIDI output terminal that the Internet phone has received a call. Prepare to inform that the internet call is received by turning on the analog switches S8 and S3-1, and indicate that the telephone is present by repeating ON / OFF the INTERNET telephone indication LED in the INTERNET key on the telephone.

At this time, the Internet software outputs a predetermined sound or music to the sound card LINE OUT RIGHT to indicate that an Internet call has come. The output of the sound card is output to the speaker through the echo cancellation IC 15, the analog switches S3-1, the resistors R41, R39, the op amp OP6, the analog switches S8, the resistors R16, and R17 to indicate that an internet call has been made.

At this time, when the receiver lifts the handset 22, the hook switch 21 is turned on and the signal is detected by the microcomputer IN6, the analog switch S8 is turned off, and the analog switches S6, S7, S3-1, S3- 2, The INTERNET LED (LED on the INTERNET key) on the phone is turned on, and the Internet phone is in a state of being called.

That is, the micro-input sound is amplified by a normal microphone amplifier circuit composed of resistors R13, R14, and an op amp OP10 (specific circuits include components such as condensers), and the ratio of resistors R45, R49 via analog switch S7. The amplifier is inverted and amplified by the op amp OP7, and is amplified through the op amp OP5 at the ratios R37 and R38 via the analog switch S3-2, and passed to the IN2 of the echo canceller IC. Internet phone software compresses this sound and transmits it to the other party. The other party receives this data, decompresses it, and outputs it through the sound card.

And, the process of outputting the voice of the other party is as follows.

The output of the sound card (LINE RIGHT OUT) is via the echo cancellation IC 15 via the analog switch S3-1, via the handsets R41, R39, op amps OP6, analog switches S6, resistors R12, R11, op amps OP8. Is passed to the output.

As described above, a single hotkey on the phone can also support a hotkey for a regular phone, and can also support a hotkey for an internet phone. It also has the advantage of listening to the sound instead of DTMF wine ring while listening to the sound instead

2) Allow others to make phone calls while they are using an internet phone from outside.

(1) Explanation of operation when using an internet phone by making an external call

When a call is received from the outside, a ring signal is transmitted to the telephone line 2, and the ring detector 5 detects it and transmits it to the microcomputer IN5. (This section is an explanation of one example of using an internet phone externally.) At this time, when the call is not answered for a certain time (or when the go out button on the phone is turned on), the microcomputer switches the analog switches S1-1 and S1. -2, prepare the relay (RELAY1) to turn on the external CO line and the internet phone, and notify the internet phone program of the computer through the MICOM output OUT7. The Internet telephony program outputs the following message through the sound card line out.

"You are currently out. Press 1 to leave a voice message, press 2 to leave a phone number, or press 3 to access a free international phone."

This message is transmitted to the telephone line input / output separation circuit 9 through the echo cancellation IC 15 and the analog switch S1-1 to output sound to the telephone line as described above.

When the user hears this message (or can also press it before hearing if they know how to use it), pressing # 3 will route the dial signal from # 3 to the output of the op amp OP1, such as the ring sound path transmitted when the above call is being made. This signal is inverted and amplified by the op amp OP9 at the ratio of the resistors R22 and R23, and is transmitted to the dial signal detecting IC 6 and the dial detecting IC 6 detects that the key number is three. The dial detection IC 6 transmits the key 3 message to the microcomputer via the microcomputers IN1, IN2, IN3, and IN4, and the microcomputer transmits it to the Internet software through the above-described sound card MIDI input line.

The Internet software sends the following message to the external caller as described above. "Please enter your phone number, including international number, country code and area code, and we will connect you to the internet." When you hear this message and press the key corresponding to the phone number in sequence, it is delivered to the computer's Internet phone software in the same path as the above-mentioned key 3 operation, and the Internet software reads the shortcut file described above and matches the phone number. It finds the number and makes an Internet call to the IP. (Usually, the way to provide PC TO PC Internet phone is supported by the server.)

As described above, the present invention can make an Internet phone call from outside.

(2) Using another Internet phone while using the Internet phone from outside.

If you can't use your phone while someone else is using your overseas free internet phone, you can't use the phone.

When using an internet phone from outside (for (1) described above)

When the user picks up the handset of the present invention, the microcomputer detects the operation of the hook switch 21 and delivers it to the Internet software on the computer as described above. Internet software now knows that it supports Internet telephony through the LINE RIGHT IN / OUT port of the sound card, and is ready to support another internet phone via the LINE LEFT IN / OUT port. Micom also knows that it is using an internet phone through the LINE RIGHT IN / OUT port of the sound card, and does not turn on other analog switches S2-1, S2-2, S3-1, and S3-2. , S7 (S6, S7 is a handset telephone mode switch), S4-1, S4-2 is turned on to create the Internet phone mode through the sound card LINE LEFT IN / OUT.

When the user presses a hotkey on the phone or enters the number of the phone, the internet phone software makes an internet phone call using the sound card LINE LEFT IN / OUT, as described above. It is similar to the method used, but there is only a difference between an internet phone using LINE RIGHT IN / OUT and a LINE LEFT IN / OUT in one software, and other contents are related to ordinary Internet software and the description is omitted.)

A call using LEFT IN / OUT is made and the user's words are transmitted to the sound card LINE LEFT IN through the analog switch S4-2 through the microphone, the telephone handset input / output circuit (7), and the telephone input mix circuit (12). The software sends this sound to the PC of the person talking to the user.

When the other party's sound is transmitted through the Internet software, this output is output through the sound card LINE LEFT OUT, which is received through the analog switch S4-2, the telephone output mix circuit 10 and the handset input / output circuit 7. Is outputted to (22).

The internet phone in the speaker phone mode or the headphone mode is also operated as mentioned above, and thus description thereof is omitted.

As described above, the telephone of the present invention provides a function of using an internet telephone even when using an internet telephone from the outside.

3) It supports the extension function of the key phone system and also supports the Internet phone with the same extension key.

Conventional key phone system-dedicated telephones support dozens of shortcut internal keys as in the present invention. However, these phones are only available when supported by the keyphone itself and do not allow Internet phone calls.

In the case where it is assumed that the case of using the telephone of the present invention in the keyphone is a case where a special character such as "@" is entered before the telephone number when entering the telephone number in FIG. As an example, let's say @ 101, the IP as the IP number, and Hong Gil-dong as the name.

(1) If you change your phone number

If you want to change Hong Gil-dong while you are talking to the user through the key phone system through private phone system from outside, press the hot key 1 and there will be a special character @ in the hot key corresponding number. It transmits key dial signal and outputs the corresponding station number 101 through the microcomputer analog output terminal A-OUT2.

This signal is transmitted to the telephone line 2 as in the above-described dialing, which is then transmitted to the key phone system corrector. The key phone system connects an outside person's phone to the next telephone number after the flash key.

In other words, you can commit special characters to the flash key of a regular phone, remember special characters + premises phone number in the EEPROM, and output the number after the microcomputer outputs the play key signal to faithfully perform the functions of the expensive Internet key phone-only phone. Will be.

(2) When calling the premises telephone

(1) In the case of changing to the extension number, because the microcomputer already knows that it is in communication with the outside, it outputs the extension number after sending the corresponding flash signal, but when not in communication with the outside, only the corresponding extension number dial signal without the corresponding flash key signal By outputting, the internal currency is realized.

If you do not enter the special characters in the above description, and set up by using the phone of the present invention connected to the keyphone system at the time of installation, Micom remembers this, when you are talking to the outside when a hot key is entered flash + key dial It outputs a signal and outputs only the dial signal corresponding to the premises number when not talking to the outside to perform the function of a dedicated phone.

(3) Of course, when making an internet call with the PC of the premises user, press the INTERNET key and then press a shortcut key as described above to make an internet call with the IP of the premises user.

As described above, the present invention performs an Internet shortcut key function while also performing an internal key phone shortcut key function with one shortcut key.

4) Notifies you that you have a phone call while you are on the internet phone call, suspends the internet phone call for a while, allows you to continue to make an internet call after making a phone call, or to make an internet call and a phone call at the same time. For example, it is possible to temporarily suspend the CO line call and continue the CO line call again after the internet phone call, or to realize a multi-party call that simultaneously realizes the Internet call and the CO line call.

(1) When a C.O.line comes in during an internet call

When talking on the Internet as in the condition of (2) above (in the handset mode, the analog switches S6, S7, S3-1, and S3-2 are ON). 2) ring signal, and as described above, the ring signal from the ring detector (5) to the micom informs the ring signal, the microcomputer outputs the "call is coming" or "ring sound" through A-OUT1, etc. The analog switch is output to the handset to indicate that there is a CO line call, or to inform the Internet phone program of the computer through MICOM OUT7 that the CO line call is on, and the Internet phone program is displayed through the LINE LEFT OUT. I have a call request. "Turn on the S4-1 switch.

The PHONE LED in the middle of the PHONE switch of the telephone is turned 0N / OFF through the MICOM OUT-LED output terminal so that the phone line can be identified by the eyes.

At this time, if the user presses the PHONE key to make a phone call, the microcomputer repeatedly turns on / off the LED in the middle of the INTERNET key and lights up the LED on the below hold key, indicating that the user is suspended during the internet call. MyComm, through its OUT7, sound card MIDI input terminal, informs the Internet phone software that it is holding an Internet phone and is on a CO line.

The Internet phone software then plays the pre-registered music to the Internet phone party so that they can listen to the music while waiting.

MICOM also turns off the analog switches S3-1 and S3-2 so that the user's sound is not transmitted to the other party through the Internet telephone, and the analog switches S2-1, S2-2 and relay RELAY1 are turned on to turn on the CO line. To be

The telephone line output separation circuit 9 is described below.

The voice of the trunk line counterpart is applied to the negative terminal of the operational amplifier OP1 through the telephone line 2, the relay RELAY1, and the transformer 4, and this is amplified at the output of the OP1 as described above.

This signal is inverted and amplified by the op amp OP3 at the ratio of the resistors R2 and R3 and inverted and amplified by the op amp OP4 at the ratio of the resistors R5 and R6. At this time, the output of the operational amplifier OP2 and the negative terminal input of the OP1 are the same as described above, and the output of the operational amplifier OP1 is amplified at the ratio of the shear impedance including the transformer to the positive terminal of the operational amplifier OP1 at the ratio of R1. If the ratio is equal to the ratio of the resistors R2 and R3, and the values of the resistors R5 and R4 are the same, the output of the op amp OP2 does not affect the op amp OP4.

In other words, the output of the op amp OP2 is amplified by the ratio of the trans-shear impedance including the transformer to R1 to be the output of the op amp OP1, and the inversion is reduced by the amplification by adjusting the ratios of the resistors R2 and R3. If the resistors R5 and R6 are the same, the output of the op amp OP4 does not come out.

Therefore, what is output to the telephone line does not return to the input again. However, the signal coming from the outside through the telephone line appears as the output of OP1, and this signal is amplified and delivered to the output of the op amp OP4 since the output of the op amp OP2 is not changed, and is transmitted to the output of the telephone or the sound card. .

The telephone line input / output separation circuit 9 is operated as described above to separate the input and output.

(1-1) Ending a C.O.line call and resuming an Internet phone call

After completing the CO line call, press the phone switch on the phone once more, and the microcomputer receives the phone key signal and ends the CO line call by turning off the LEDs in the middle of the analog switches S2-1, S2-2, Relay1 and phone keys. Turn on the LED to the light state, turn off the LED on the hold key below to indicate that the Internet phone status, and turn on the analog switch S3-1, S3-2 again to allow the user to continue the Internet call.

(1-2) Simultaneous call function in which the voice of the trunk line caller is not transmitted to the Internet caller, and the voice of the Internet caller is not transmitted to the trunk line caller at the same time of the CO line call and the Internet call.

If the INTERNET hold key on the phone is pressed while a CO line call is on hold and the Internet phone call is on hold, MICOM receives the INTERNET hold key signal through the IN-KEY input terminal and changes the LED in the middle of the INTERNET key to a light state. The LED on the hold key is turned off to indicate that the Internet is in a call state, and the analog switches S3-1 and S3-2 are turned on again to allow simultaneous Internet and CO line calls.

As described above, the voice of the user is transmitted to the trunk line call through the analog switch S2-1 and transmitted to the Internet caller through the analog switch S3-2.

As described above, the voice of the trunk line caller is transmitted to the user through the analog switch S2-2, and is transmitted to the user through the analog switch S3-1. In this case, however, the analog switches S1-1 and S1-2 are turned off between the trunk line call and the internet caller, so that voices cannot be transmitted to each other.

(2-2) A multi-party call made at the same time while making a trunk line call and making a suspended Internet call.

If you press the simultaneous call key on the telephone while on the trunk line call and internet phone call is on hold, MICOM receives the simultaneous call key signal through the IN-KEY input terminal and changes the LED in the middle of the INTERNET key to the light state. Turn off the LED on the hold key to indicate the status of Internet call, turn on the analog switches S3-1 and S3-2 again to enable simultaneous Internet and CO line calls, and turn on the analog switches S1-1 and S1-2. Thus, voice is transmitted between the CO and Internet callers.

As described above, the voice of the user is transmitted to the trunk line caller through the analog switch S2-1 and transmitted to the Internet caller through the analog switch S3-2.

As described above, the voice of the trunk line caller is transmitted to the user through the analog switch S2-2, and is transmitted to the user through the analog switch S3-1.

In this case, voices are also transmitted between the trunk line caller and the internet caller through the analog switches S1-1 and S1-2 as described above.

(2) When an Internet call comes during a CO line call.

During a trunk line call (when a trunk line call is made through the analog switches S2-1 and S2-2 as described in (1) above). When an Internet phone comes in, the Internet phone software sends a MIDI out terminal (in the present invention, a MIDI input and a MIDI out). Although the terminal is designed to send and receive messages to and from the microcomputer, the computer basically has ports for sending and receiving digital messages (signals) with external devices, so it is possible to connect via a serial port, USB port, or other port rather than a MIDI port. Data ports can be sent and received, which is provided to connect to an external device, and the description is omitted since it is normal.) After receiving this, the micom receives the analog switch S3-1, Turn on S3-2 and repeat the ON / OFF operation of the INTERNET LED on the phone. It makes it.

At this time, the Internet phone software outputs the following recording file or music to inform the user that the Internet phone is available. "There is an Internet call request." This sound is output to the LINE RIGHT OUT of the sound card, and is output through the analog switch S3-1 and other output related circuits as described above.

Other details are the same as those described in (4) to (1) above, so the name is omitted.

As described above, the present invention can receive a local line call even during an internet call, can receive an internet call even during a local line call, and a multi-party call is possible.

5) While listening to music, it informs you that a general CO line is received and allows you to answer the phone while listening to music.

If you are listening to music using a music player program on your computer, that is, you are not making a phone call, you can turn on the analog switches S5-1 and S5-2. Alternatively, after detecting whether the headphone jack is connected through the microcomputer input IN27 connected to the jack switch 27, S5-1, S5-2 is turned on while not making a telephone call.

People who work at a company want to listen to music while they work, but when they listen to music through speakers, they hurt others, and when they listen to music on headphones, they do not hear ringing sounds indicating that a local or internet phone is coming. .

However, in the present invention, the analog switches S5-1 and S5-2 are positioned between the sound card output and the headphone output circuit 13, and the analog switches S10 and S11 are placed between the telephone output mix circuit 10 and the telephone input mix circuit 12. If the call is received while listening to music through analog switches S5-1 and S5-2, the user can recognize the incoming call by listening to the ring sound provided by Micom through analog switch S10. You can make a call. The trunk line telephone call is the same as described above, and music can be listened to via the trunk line through the analog switch S5-1.S5-2.

6) It is possible to realize multi-party calls that make Internet calls and CO calls at the same time while making calls, and to realize multi-party calls that make Internet calls and CO calls at the same time.

(1) Making Internet Calls During C.O.lines

If you want to make an internet call and make a call at the same time while making a trunk line call as described in 4) (2) above, press the INTERNET key on the phone and enter the relevant phone number. It works just like when you call.

If you press INTERNET key during CO line call, PHONE LED of the phone repeats ON / OFF, PHONE hold LED is ON, INTERNET LED is ON, analog switch S2-1, S2- as shown in (2) above. 2 is turned off, and analog switches S3-1 and S3-2 are turned on.

If you press the telephone call key after making an internet call, PHONE LED, INTERNET LED, analog switch S1-1, S1-2, S2-1, S2-2, S3-1, S3-2 are turned on and PHONE hold LED Is turned off to be a simultaneous call as described above.

(2) Making a CO line call during an internet phone call

As described above, if you press the PHONE key during an internet phone call, the INTERNET LED of the phone repeats ON / OFF, the INTERNET hold LED is ON, the PHONE LED is ON, and the analog switch S2 as shown in (1) above. -1, S2-2 are on, and analog switches S3-1, S3-2 are off.

At this time, if you press the hot key or the corresponding phone number, the CO line call is connected as described above, and if the simultaneous call key of the phone is pressed after making the CO line call, PHONELED, INTERNET LED, analog switch S1-1, S1-2, S2 -1, S2-2, S3-1, S3-2 are turned ON and the INTERNET Pending LED is turned OFF to make a simultaneous call as described above.

7) Notifies you that you have another Internet call while you are on the Internet, and you can temporarily hold a busy Internet call, receive a new Internet call, and then continue talking on the Internet, whether you are on a call again or make another Internet call at the same time. To be.

If you press the INTERNET1 key while making an Internet call as described above by operating the telephone's INTERNET key, MICOM receives this signal and transmits it to the computer's Internet telephony software as described above. The LED above the INTERNET key is ON. Repeat / OFF, LED of INTERNET hold key turns ON and LED of INTERNET1 turns on, indicating that the number 1 internet phone is in use. At this time, if you enter a shortcut or phone number as described above, the microcomputer receives and delivers it to the Internet phone software, and the Internet phone software connects another Internet phone.

When the simultaneous call key is pressed, the LED on the INTERNET LED, the INTERNET1 LED, and the simultaneous call button is turned on, and the held LED is turned off. When the microcomputer detects the simultaneous call key and sends it to the Internet software, the Internet software performs the simultaneous call function (the Internet telephone software is ordinary Internet telephone software).

Other descriptions are supported in the same manner as described above for simultaneous CO line and Internet phone calls or one hold call description. The only difference is that the Internet telephony software determines whether or not to send the user's voice to the INTERNET phone user or INTERNET 1 phone user, rather than to operate with an analog switch.

8) Supports various phone states by voice without hearing number key sound made of DTMF.

(1) When using a local telephone only without using a computer

The microcomputer of the present invention is composed of two analog outputs and an analog switch. As described above, A-OUT1 outputs a sound delivered to the user, and A-OUT2 outputs a key dial sound composed of DTMF. Therefore, you do not have to listen to the DTMF output for dialing. You don't even need to hear the ringing sounds you're making.

(2) When using a computer together.

As described above, various sounds recorded in the computer are output through the analog switch S3-1, instead of the DTMF sounds or the telephone number dial signals indicating the state of various telephone operations.

9) Supports the ability to go out to make the most of computer's performance.

If you are calling from outside and receive additional instructions to the message guide as described in paragraph (1) of item 2), "You are now out. Press 1 to leave a voice message, or press 2 to leave a phone number. Key, press number 3 to access free international calls, press number 4 to access special features. "

If you press # 4, you'll see a few emails, a few voicemails, and a few phone requests. You can use the number 1 key to check your email, the number 2 to check your voicemail, and the phone request number. If you press the 3 key, the service will be supported. " Of course, you can take advantage of the more features your computer supports.

In this case, when the first key is pressed to check the e-mail, it is possible to support the normal TEXT TO SPEECH program.

Press 3 to confirm your call request. "When you leave the message, press the 1 key to guide you in the order of the latest request, and press the 2 button to guide you in the order of the past. To return to the previous function, press the key 3, and dial the phone number Press the star key. You have a 000-000 call request. A 000-0001 call request. "

The guidance is that the software of the computer makes the sound through the LINE RIGHT OUT terminal of the sound card and the output is a telephone line as described above. As described above, the key signal input from the external telephone is outputted to the output of the op amp OP1, and this signal is detected by the dial signal detecting IC and transmitted to the computer software through the microcomputer to support the corresponding function.

The present invention connects voice sound input / output with an analog switch, and separately processes a dial signal detecting IC to separately detect a key dial signal even while outputting various messages so that a computer program supports the corresponding function.

10) Do not listen to the number key sound in using the speaker phone.

When using the speaker phone mode, the key dial sound output by the microcomputer is output through A-OUT2 and transmitted to the telephone line, but the telephone line input / output separation circuit 9 described above does not send the output sound back to the telephone output mix circuit 10. Therefore, it is not delivered to the speaker.

Since the phone call state, the microcomputer outputs the guidance sound through A-OUT1, and the guidance sound is transmitted to the speaker through the telephone output mix circuit 10 and the analog switch S8.

The present invention made as described above is used as a shortcut key for an Internet phone as one shortcut key, and also used as a shortcut function for a normal phone; Allow other people to make other Internet calls while they are using the Internet phone from outside; Supports the extension exchange function of the key phone system; It notifies you that a phone call is received during an internet phone call, allows you to temporarily suspend an internet phone call and allow you to continue to make an internet call after making a phone call, or to make an internet call and a phone call at the same time. Make it possible to realize a multi-party call which simultaneously realizes a call; Notify you of a landline or landline call while listening to music, and allow you to answer calls while listening to music; It notifies you that an internet call has been made during a public line call, and allows you to suspend the local call and continue the call again after making an internet phone call or to make both a local call and an internet call at the same time. To realize a multi-party call that simultaneously Informs that there is another internet phone call during the internet call, and to hold the internet phone call in progress and to receive the incoming internet phone call and to continue the internet phone call again or with the other internet phone while on the internet phone; It is possible to support various telephone states by voice without hearing the number key sound made of DTMF; Providing a computer answering machine function; Using speaker phones provides the effect of not having to hear the number key sound.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments and the general knowledge in the technical field to which the present invention pertains without departing from the spirit of the present invention. Various changes and modifications will be made by those who possess.

Claims (6)

A ring detector for detecting a call signal through a general telephone line; A relay connected to a rear end of the ring detector to turn on / off a line; A transformer having an electrical insulation function connected to a rear end of the relay; A general telephone line input / output separation circuit connected to the transformer and separating input / output signals of a general telephone line; A sound card input front end mix circuit for mixing the input of the normal telephone line and the input of the ordinary telephone to be mixed to be delivered to the line input terminal of the sound card; An echo canceling unit connected between the telephone line input / output separation circuit and an input / output terminal of the sound card to cancel echoes of signals input and output; An analog switch connected between the input / output terminal of the sound card and the general telephone line input / output separation circuit to control the circuit connection; A dial signal detector for detecting a dial signal input through a telephone line through the telephone line input / output separation circuit; A telephone input / output circuit for mixing telephone input / output signals through the analog switch; A telephone handset circuit connected to the telephone input / output circuit for inputting / outputting to a telephone handset; A speakerphone circuit connected to the telephone input / output circuit for inputting / outputting to the speakerphone; A headphone input / output circuit connected to the telephone input / output circuit for inputting / outputting to a headphone set; Control the relay through a relay driver, detects a ring signal, controls the input and output of the sound card, and receives a key input of the user and the general telephone and the Internet comprising a control unit for outputting the operation status through the display Telephone connection device having a combined function of a telephone. The computer system of claim 1, wherein the telephone line is connected to a ring detector, a relay, a transformer, and a telephone line input / output separation circuit, and an analog switch is connected between a sound card sound input and output terminal including the echo canceling unit. A telephone connection device having a combined function of a general telephone and an internet telephone, characterized in that it enables the user to use an Internet telephone through a computer from outside and to listen to various messages stored in the computer. 2. The telephone set according to claim 1, wherein an analog switch is connected between the telephone input / output mix circuit, the telephone handset circuit, the speaker phone circuit, the headphone input / output circuit, and the output terminal of the sound card, so that a telephone call can be made while listening to music with headphones. It can be used as a handset for a trunk line phone or an internet phone, and a single speaker and a micro phone can support both a trunk line speaker phone mode and an internet phone speaker phone mode. Telephone connection device. The method of claim 1, wherein the signal output from the output line of the telephone line input / output separation circuit is input to the controller to detect the signals of the telephone line, to output the telephone call status guidance sound to the controller, and to output the key dial sound. Thereby, the telephone connection device having a combined function of a regular telephone and an internet telephone, characterized in that it automatically determines whether or not the incoming call. The system of claim 1, wherein an analog switch is connected between the telephone input mix circuit, the telephone output mix circuit, the telephone line input / output separation circuit, and the input / output circuit of the sound card to support a trunk line call with a single telephone. A telephone connection device having a combined function of a regular telephone and an internet telephone, which can be supported and supported simultaneously. According to claim 1, wherein the control unit stores the data for the shortcut key in its own memory, and has an interface for transmitting and receiving data with the sound card, so as to use a local telephone call with one shortcut key, and also as an Internet telephone shortcut key A telephone connection device having a combined function of an ordinary telephone and an internet telephone, which can be used, and supports an on-site exchange, supports an on-site telephone call, and simultaneously supports an internet telephone hot key function.