KR0181002B1 - A telephone - Google Patents

Abstract

The present invention relates to a telephone and a control method thereof operating in conjunction with a personal computer (PC), comprising: line connection means (10) for connecting in a state for detecting a call state or a ring signal by a connection control signal; PC and keyboard connection means 20 connected to a personal computer (PC) and a keyboard; Call control means (30) connected to said line connection means (10) for controlling transmission and reception of telephones; Means (40) connected to the call control means (30) to perform a handset function; Ring signal detecting means (50) for detecting a ring signal; Ring signal generating means (60) for generating a ring signal; DTMF tone generating means 70 for generating a DTMF tone signal; And central processing means (80) for controlling the use of the telephone and the use of the PC by controlling the respective functional units, wherein the control method for the telephone configured as described above comprises the steps of: When the keyboard data is received for the telephone usage request by generating a ring signal for a time, the line connection state is in a call state, and the connection between the PC and the keyboard is switched. A first step (100 to 110) of connecting a connection, initializing the system when the call is completed, and switching a line connection state to a connection state for detecting a ring signal; And after initializing the system, upon receiving a telephone call request, puts the line connection into a call state, switches the connection between the PC and the keyboard, receives the dialing digit from the keyboard, stores it, subtracts the counter, and generates a DTMF tone. The second step of connecting the PC and the keyboard when receiving a request for the use of the PC in a busy state, initializing the system when the call is completed, and switching the line connection state to the connection state for detecting the ring signal. It is possible to use a PC and a telephone at the same time, including 200 to 212, and to make a call using a headset, thereby providing a very convenient effect.

Description

Telephone and operating method that interoperates with personal computer (PC)

1 is a functional block diagram of an embodiment of a telephone according to the present invention.

2 is a detailed circuit diagram of an embodiment of a telephone according to the present invention.

3 is a diagram illustrating a combination of a telephone and a PC according to the present invention.

4 is a diagram illustrating an embodiment of a keyboard used in the present invention.

5 is an overall control flow chart according to the present invention.

* Explanation of symbols for main parts of the drawings

10: line connection 20: PC and keyboard connection

30: call control unit 40: headset

50: ring signal detector 60: ring signal generator

70: DTMF tone generating unit 80: central processing unit

The present invention relates to a telephone and a control method thereof which operate in conjunction with a personal computer (PC).

When a conventional personal computer (PC) and a phone are used separately, in order to use the phone at the same time while using a PC, there is an inconvenience such as handling a handset with a shoulder or the like.

In addition, in the case of a phone that is built in a PC or operated by a program using a serial port or a parallel port, an installation environment limited by the use of serial and parallel ports, which are limited resources of a PC, is inevitable. In addition to the crash of the PC and other programs, such as the use of the phone and the use of the telephone PC was not possible problems.

In order to solve the problems of the prior art, the present invention is installed between the PC and the keyboard and the phone operating in conjunction with the PC as a hardware that can be used at the same time using the PC and the phone, a telephone that can make a call using a headset and The purpose is to provide a control method.

The present invention for achieving the above object is connected to a telephone line line connection means for connecting to a state for detecting a call state or a ring signal by a control signal; PC and keyboard connection means connected to a personal computer (PC) and a keyboard to output keyboard data or to switch the connection between the PC and the keyboard by a keyboard data control signal; Call control means for receiving a DTMF tone transmission control signal and a DTMF tone signal and being connected to the line connection means to control transmission and reception of a telephone; Handset means connected to said call control means to perform a handset function; Ring signal detection means for receiving a ring signal of the line connection means and detecting a ring signal to output a ring detection signal; Ring signal generation means for generating and outputting a ring signal by the ring signal generation control signal; DTMF tone generating means for receiving the dialing digit data and the DTMF tone generating control signal and generating and outputting the DTMF tone sending control signal and the DTMF tone signal; And receiving a ring detection signal from the ring signal detection unit, outputting a ring signal generation control signal to the ring signal generation unit, and receiving keyboard data of the PC and keyboard connection unit, and connecting a connection control signal for call control to the line. A control signal for generating DTMF tones by outputting to a connection means, outputting keyboard data control signals for controlling the connection between the PC and the keyboard to the PC and the keyboard connection means, and receiving dialing digit data through the PC and the keyboard connection means. And central processing means for outputting data to the DTMF tone generating means and outputting a call blocking control signal to the call control means at the request of the user.

In addition, in a telephone control method applied to a telephone operating in conjunction with a personal computer (PC), after initializing the system, if a ring signal is detected, a ring signal is generated for a predetermined time to receive keyboard data for a telephone usage request. When the line connection is in a call state, the PC is connected to the keyboard and the PC is connected to the keyboard when the call is completed. When the call is completed, the system is initialized and the line is connected. Switching to a connection state for ring signal detection; And after initializing the system, upon receiving a telephone call request, puts the line connection into a call state, switches the connection between the PC and the keyboard, receives the dialing digit from the keyboard, stores it, subtracts the counter, and generates a DTMF tone. The second step of connecting the PC and the keyboard when receiving a request for the use of the PC in a busy state, initializing the system when the call is completed, and switching the line connection state to the connection state for detecting the ring signal. Characterized in that it comprises a.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a functional block diagram of an embodiment of a telephone according to the present invention, in which 10 is a line connection, 20 is a PC and keyboard connection, 30 is a call controller, 40 is a headset, 50 is a ring signal detector, and 60 is a ring. The signal generator 70 denotes a DTMF (Dual Tone MultiFrequency) tone generator, and 80 denotes a central processor.

First, referring to the reception operation of the present invention, the line connection unit 10 receives a ring signal from the outside and transmits it to the ring signal detection unit 50, and the ring signal detection unit 50 is inputted from the line connection unit 10. The ring signal is detected and the ring detection signal is output to the central processing unit 80.

The central processing unit 80 outputs a ring signal generation control signal for generating a ring signal to the ring signal generation unit 60 when receiving the ring detection signal from the ring signal detection unit 10.

The ring signal generator 60 receives the ring signal generation control signal of the central processing unit 80 to generate and output a ring signal.

The central processing unit 80 connects the line connection unit 10 to the call control unit 30 when receiving arbitrary data synchronized with the keyboard clock for a phone call from the user through a PC connected to the keyboard and the keyboard connection unit 20. Outputs a control signal for the control, and simultaneously outputs a keyboard data control signal for switching the connection between the keyboard and the PC to the PC and keyboard connection portion 20.

The central processing unit 80 receives a keyboard data control signal from the user through the PC and the keyboard connection unit 20 after receiving a predetermined data for connection between the PC and the keyboard from the user in a call state. Output to the PC to enable use.

The central processing unit 80 initializes the system when the call is completed and receives arbitrary data for ending the call from the user.

Looking at the transmission operation of the present invention, the central processing unit 80 transmits the keyboard data control signal to the PC and the keyboard connection unit 20 when the same data input during the telephone call in the reception operation is input through the PC and the keyboard connection unit 20. It outputs to switch the connection between the PC and the keyboard, and also outputs a connection control signal to the line connection unit 10 to be connected to the call control unit 30.

When the dialing digit data is received through the PC and the keyboard connection unit 20, the central processing unit 80 outputs the input dialing digit data to the DTMF tone generating unit 70 together with the DTMF tone generating control signal. The DTMF tone generator 70 generates DTMF tones by the digit data and the DTMF tone generation control signal input from the central processing unit 80 to output the DTMF tone transmission control signal and the DTMF tone signal to the call controller 30. do.

The call control unit 30 outputs the tone signal input by the control of the DTMF tone generating unit 70 to the exchange through the line connection unit 10.

When connected with the called party and receives data for connecting the PC and the keyboard from the user as in the receiving operation during the call, the central processing unit 80 outputs the keyboard data control signals to the PC and the keyboard connection unit 20 to connect the PC and the keyboard. Connect and change to the available state.

As in the receiving operation, the central processing unit 80 initializes the system when the call is completed and receives arbitrary data for ending the call from the user.

The central processing unit 80 operates by receiving a clock of the clock generation unit 90, and outputs a call blocking control signal to the call control unit 30 to suspend a call state, and other phones supported by other general telephones. It also supports the function of connecting.

The headset 40 is connected to the call control unit 30 and performs a function of a handset for making a call using a two-wire for receiving two-wire transmission.

2 shows a detailed circuit diagram of an embodiment of a telephone according to the present invention.

The telephone line connected to the JP1 modular jack of the line connection unit 10 is connected to the contact point of the relay switch K1 via a poly switch F1 (Poly Switch).

At this time, the poly switch F1 connected in series with the line is a circuit protection element to prevent overcurrent caused by lightning strikes from the line, and the semiconductor resistance element RV1 (Varistor) connected in parallel with the line is an overvoltage (more than 470 volts) flowing from the line. It is a circuit protection element for protecting a circuit from a.

The relay switch K1 performs a function of switching the line between the call control unit 30 and the ring signal detection unit 50, and is connected to the ring signal detection unit 50 to detect a ring signal input from the outside. It is switched from the call control unit 30.

The relay switch K1 is driven by the transistor Q2 (PN2907), and the base state is normally maintained in a 'high' state, and when the state is 'low' under the control of the central processing unit 80, it is turned on. Will work. The resistor R31 connected to the base is a resistor for limiting the current flowing through the transistor TR. The relay switch K1 connects, disconnects, etc. the line, and its operation is controlled by the central processing unit 80 through the transistor TR2.

The diodes D1, D2, D3, and D4 of the call control unit 30 are used for matching polarity when the line is connected, and the zener diode D8 absorbs the shock voltage generated when the line is ON and OFF. It is used as an element for protection of the call control unit 30.

The call blocking circuit 31 of the call control unit 30 operates under the control of the central processing unit 80 and is connected by using a photo coupler for insulation from the telephone line.

The call control unit 30 operates as a power source of the PC side, and the connection with the DTMF tone signal of the DTMF tone generating unit 70 is a transformer 32 having an impedance of 600: 600 for insulation on the call power source and the power source on the telephone line side. Connected to each other to solve the insulation problem on the power supply, and the DTMF tone emission control signal of the DTMF tone generator 70 is likewise connected by a photo coupler 33 to solve the insulation problem. In addition, the headset 40 is connected through the modular JP2 34.

The handset of the headset 40 used dynamic speakers, and the talker used a condenser microphone.

The central processing unit 80 uses 89C2051 of ATMEL, which is an Intel 8051 series, and its main specifications are as follows.

1) Compatible with MCS51 Series

2) 2K Bytes of Internal Flash Memory

3) 128 x 8 bit internal ram

4) Operation power supply: 2.7-6V

5) Operating Frequency: 0HZ-24MHZ

6) 16 programmable I / O lines

7) 2 interrupt terminals

8) Two 16-Bit Timers Built-In

Looking at the use of the central processing unit chip as follows.

1) Port P1.0-P1.6: DTMF Tone Generation Control Port

2) Port P1.7: Ring Signal Generation Control Port

3) Port P3.0: Transmission Blocking Control Port

4) Port P3.1: Keyboard Data Control Port

5) Port P3.2: Keyboard Clock Receive Port

6) Port P3.3: Ring Detection Signal Receiving Port

7) Port P3.4: N.C

8) Port P3.5: Keyboard Data Receive Port

9) Port P3.7: Connection Control Signal Output Port

10) Operating Frequency: 12MHZ

11) Operation power supply: DC 5V

The keyboard connection of the PC and keyboard connection unit 20 is connected to the DIN connector 5, and the names of each pin are as follows.

Pin 1: Clock

Pin 2: data

Pin 3: N.C

Pin 4: Ground

Pin 5: DC 5V

The power of pins 5 and 4 connected from the PC side connector is connected to the power pin of the keyboard side and used as the power inside the controller.

The clock of pin 1 and the data of pin 2 are connected to IC 4066 to control the connection between PC side and keyboard side. All control is done by controlling pins 12 and 13 of IC 4066 directly from central processing unit 80.

In addition, the clock is connected to port P3.2 of the central processing unit 80 to monitor all data transmitted from the keyboard, and the data is connected to port P3.5 of the central processing unit 80 so that each time of the clock Retrieve the data. At this time, the IC 4066 turns on and off the clock and data of the keyboard to prevent the data from being transferred to the PC during the operation of the telephone call. The IC 4066 is turned on when the PC is resumed to operate normally.

The DTMF tone generator 70 is composed of a UM95089 and operates at a frequency of a crystal external to the DTMF tone generator, and has a clock oscillating circuit therein. The UM95089 divides and counts the oscillated frequency internally to generate eight kinds of frequencies. The UM95089 combines these to transmit 16 DTMF signals according to the state changes of ports R1-R4 and C1-C4. The external resistor R2 is a resistor for correcting the output of the open state, and the resistor R3 and the capacitor C4 are filters for shaping the output tone.

The ring signal detection unit 50 is separated from the line by DC by a capacitor C18 connected to the line connection unit 10. When ringing, the AC signal of 20HZ limits the current by the resistor R20, and the zener diodes D6 and D7 Is applied to the photocoupler by limiting the voltage. At this time, the diode D5 connected in the reverse direction serves to protect the circuit when the photo coupler is in the reverse voltage state for reverse voltage absorption.

When the photo coupler operates, the transistor creates a conductive state with light in the transistor base, so the transistor becomes conductive and changes the ring signal detection port from 'high' to 'low'. This will be detected.

The clock generator 90 is composed of a crystal element and supplies a clock to the clock input terminal of the central processing unit 80.

The ring signal generator 60 operates the transistor Q1 by the signal transmitted from the port P1.7 of the central processing unit 80 to operate the buzzer, and the resistor R29 is used to limit the current to protect the buzzer from overcurrent. Resistance.

3 shows an example of the combination of a telephone and a PC according to the present invention.

The present invention is a device that uses a keyboard of the PC is built in the keyboard connector and the PC connector on the outside of the equipment. This is to interrupt the operation of the PC by intercepting the data transmitted to the PC when the keyboard data transmitted from the keyboard to the PC is used, and to enable the use of the PC when the phone function is in a call.

When installed, the present invention is located between the keyboard and the PC, and the PC and the keyboard are connected by using the connector built in the present invention, and the telephone line is connected to the connection jack in the direction connecting the PC, and the headphone is connected in the direction of the keyboard connection. Connect to

Figure 4 shows an example of using a keyboard used in the present invention.

When a call is received from the other party, the built-in ring signal generation unit 60 sounds an audible bell, so it recognizes this and presses the function key F12 on the keyboard to answer the call. Enable the use of.

Other functions of the present invention include a hook flash function for subscribers of a private auto switch, a transmission blocking function for temporary transmission blocking, and a headset connection function for free.

More specifically, when looking at the keys of the keyboard used in the present invention, F10 is used for the use of the PC during the call of the phone and during the use of the phone, F11 is used for closing the call of the phone and ending the use of the phone, F12 Use for phone calls and use.

'.' Is used to temporarily block the phone while the phone is in a call. Press once to block the call and press again to start the call. '+' Is FLASH, which is used to pause the line for the switching operation of the private auto attendant subscriber's phone, and numbers 1-0, *,-(#) are for dialing telephone numbers. Is the same as

(A) and (b) of FIG. 5 are overall control flow diagrams according to the present invention, and FIG. 5 (a) shows the process of receiving the telephone of the present invention, and FIG. 5 (b) shows the transmission of the telephone of the present invention. Indicate the process.

Looking at the reception process first, after initializing the system (100), if a ring signal is detected, the ringer operation is indicated in the status register, and the ringer operating frequency is counted (102) and the ring signal generation is required for a predetermined time. 103)

Here, the initialization of the system is performed to form a standby state for an unstable state during the initial operation of the PC. The process first disables interrupt 0, initializes the system, disables interrupt 0, and resets the phone number memory. This is done by initializing and waiting for 3 seconds to activate interrupt 0. In addition, the ringer operation is performed for 1.2 seconds, and the ringer frequency uses 2400HZ.

After the ring signal is generated, it is determined whether the keyboard data value for using the telephone is received from the user (104). If not, it continuously requests the generation of the ring signal. The connection between the PC and the keyboard is switched (105).

In this way, when the phone is in a busy state (106) and receives keyboard data for connection between the PC and the keyboard from the user (107), the PC is connected to the keyboard and the PC is enabled (108).

When the call is completed (109) when the keyboard data for initialization is received from the user, the system is initialized, and the line connection unit 10 is switched to the connected state for detecting the ring signal (110) and ends.

Next, the transmission process for making a telephone call according to the present invention, after initializing the system in the same manner as the reception process (200), and receiving the telephone use request keyboard data (201), the line connection unit 10 is controlled to connect to the call state. In operation 202, the connection between the PC and the keyboard is switched.

Upon receiving a dialing digit from the keyboard (203), the status during dialing operation is indicated in a status register, the dialing digit is stored, and the count is subtracted (204).

After determining whether the received dialing digit is normal (205) and initializing the buffer in which the phone number is stored if it is not normal (206), receiving the dial digit from the keyboard (203) or less, and if it is normal, generating a DTMF tone 207 is placed on the call (208). When receiving the keyboard data for the connection of the PC and the keyboard from the user in the busy state (209), the PC is connected to the keyboard and the PC is enabled (201).

When the call is completed (211) and receives keyboard data for initialization from the user, the system is initialized, and the line connection unit 10 is switched to the connection state for detecting the ring signal (212) and ends.

The present invention configured and operated as described above can install a phone operating in conjunction with a PC between the PC and the keyboard as a hardware so that the PC and the phone can be used at the same time, and can make a call using a headset. to provide.

Claims (7)

Line connection means (10) connected to the telephone line and connected for detecting a call state or a ring signal by a connection control signal; A PC and keyboard connection means 20 connected to a personal computer (PC) and a keyboard to output keyboard data or to switch the connection between the PC and the keyboard by a keyboard data control signal; Call control means (30) for receiving a DTMF tone transmission control signal and a DTMF tone signal and being connected to the line connection means (10) to control transmission and reception of a telephone; Handset means (40) connected to the call control means (30) to perform a handset function; Ring signal detection means (50) for receiving a ring signal from the line connection means (10) to detect a ring signal and output a ring detection signal; Ring signal generation means (60) for generating and outputting a ring signal by the ring signal generation control signal; DTMF tone generating means (70) for receiving the dialing digit data and the DTMF tone generating control signal and outputting the DTMF tone sending control signal and the DTMF tone signal; And receiving a ring detection signal of the ring signal detecting means 50 to output a ring signal generation control signal to the ring signal generating means 60, and receiving keyboard data of the PC and the keyboard connecting means 20 to make a call. Outputs a connection control signal for control to the line connection means 10, outputs a keyboard data control signal for connection control between a PC and a keyboard to the PC and the keyboard connection means 20, and sends dialing digit data to the PC. And a central processing means (80) for receiving through the keyboard connection means (20), outputting the DTMF tone generating means (70), and outputting a call blocking control signal to the call control means (30) at the request of the user. And a telephone. The telephone set as claimed in claim 1, further comprising clock generating means (90) for generating and outputting a clock signal to said central processing means (80). A telephone as set forth in claim 1, wherein said handset means (40) comprises a headset. In the telephone control method applied to a telephone operating in conjunction with a personal computer (PC), after initializing the system, if a ring signal is detected, a ring signal is generated for a predetermined time and a keyboard data for a telephone call request is received. Put the connection status on the call, change the connection between the PC and the keyboard, and connect the PC and the keyboard when receiving a request for the use of the PC while in a call, reset the system when the call is completed, and ring the line connection. A first step (100 to 110) of switching to a connection state for signal detection; And after initializing the system, upon receiving a telephone call request, puts the line connection into a call state, switches the connection between the PC and the keyboard, receives the dialing digit from the keyboard, stores it, subtracts the counter, and generates a DTMF tone. The second step of connecting the PC to the keyboard upon receiving a request for the use of the PC in a busy state, initializing the system when the call is completed, and switching the line connection state to the connection state for detecting the ring signal ( 200 to 212). 5. The method of claim 4, wherein the first steps (100 to 110), after initializing the system, if a ring signal is detected, indicates a ringer in operation, counts the ringer operating frequency, and requests the ring signal to be generated for a predetermined time period. A third step (100 to 104) of determining whether a telephone usage request keyboard data is received; If not received in the third step (100 to 104) continues to request the ring signal generation for a predetermined time, and if received, connect the line connection state to the call state, the PC and keyboard connection is switched to the call state PC A fourth step (105 to 107) of determining whether a request for connecting the keyboard and the keyboard is received; And when the request for the connection between the PC and the keyboard is received in the fourth step (105 to 107), connect the PC and the keyboard to enable the PC, initialize the system when the call is completed, and reset the line connection state. And a fifth step (108 to 110) of switching to the connected state for ring signal detection. 5. The method of claim 4, wherein the second step (200 to 212), after initializing the system, upon receiving a telephone call request, connects the line connection state to the call state, alternates the PC and keyboard connection, and dials a digit from the keyboard. A third step (200 to 205) of receiving and displaying a dial operation, storing a dial digit, subtracting a counter, and determining whether the received dialing digit is normal; If the dialing digit received in the third step (200 to 205) is abnormal, initialize the buffer, and then perform the process of receiving the dial digit from the keyboard.If the received dialing digit is normal, call for DTMF tone is generated. A fourth step (206 to 209) for determining whether a request for connection between the PC and the keyboard is received when the state is in the middle; And when the request for the connection between the PC and the keyboard is received in the fourth step (206 to 209), connect the PC and the keyboard to enable the PC, initialize the system when the call is completed, and reset the line connection state. And a fifth step (210 to 212) of switching to a connected state for ring signal detection. 7. The system of any one of claims 4 to 6, wherein the system initialization procedure disables interrupt 0, initializes the system, disables interrupt 0 to form a standby state for an unstable state during initial operation of the PC, and And initializing the telephone number memory and waiting for a predetermined time to activate interrupter 0.