KR20000015153A - Personal computer having a function of a digital keyphone telephone and control method thereof - Google Patents

Abstract

PURPOSE: A device and method is provided to allow a function of a digital keyphone telephone to a personal computer without having a separate computer telephony integration module. CONSTITUTION: The personal computer comprises a keyphone card(400) which has a switchboard interface(401) part for interfacing a signal received and transmitted from and to a digital switchboard; a transmit part(402) for performing a transfer operation of a voice and data between digital switchboards; a CODEC(403) for converting PCM data to an analog signal and an analog signal to PCM data; an internal interface part(404) for interfacing an internal address and the data of a computer.

Description

Personal computer having the function of digital key-phone and its control method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital private exchange system, and more particularly, to a personal computer having the function of a digital key phone and a control method thereof.

In general, a digital private exchange system is used by connecting a digital key phone telephone 110 to a digital private exchange 100, as shown in Figure 1, a personal computer 120 is used separately. As described above, in the conventional digital private exchange system, the digital key phone and the personal computer are used separately, so their utility is inferior.

Recently, the digital private exchange system, which is in the spotlight, uses a digital telephone phone 110 and a personal computer 120 through a computer telephony integration module (shown as CTIM in the drawing) as shown in FIG. Therefore, digital key phone 110 and personal computer 120 are used in conjunction. However, in such a digital private switching system, a separate computer telephone integration module must be provided so that the digital keyphone telephone and a personal computer can be used in conjunction with each other.

Accordingly, an object of the present invention is to provide an apparatus and method for providing a function of a digital key phone to a personal computer without having a separate computer telephone integration module in a digital private switching system.

In order to achieve the above object, the present invention provides an interface unit for transmitting and receiving signals to and from an exchange, a transmitter for transmitting voice and data between the exchange and a personal computer, and converting PCM data into analog signals and converting analog signals into PCM data. A keyphone card composed of a codec for conversion and a computer interface unit is mounted in an internal slot to perform a function of a keyphone telephone in a personal computer. In addition, the present invention is characterized in that the personal computer stores the operation program of the key card installed in the built-in slot in the internal memory, and the function is controlled by the CPU to perform functions according to the key phone, such as call origination.

1 is a diagram showing a connection relationship of a general digital private exchange system.

2 is a diagram showing the structure of a typical computer telephone integration module.

3 is a diagram showing a connection relationship of a digital private exchange system according to the present invention;

4 is a block diagram of a personal computer having a function of a key-phone telephone according to the present invention.

FIG. 5 is a block diagram of the key card shown in FIG. 4; FIG.

6 is a view showing a process of performing an incoming / outgoing function in a personal computer according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

3 is a diagram showing the configuration of a digital private switching system according to the present invention, wherein personal computers 310 to 340 having the function of a key phone are connected through the digital line interface of the digital switch 100.

4 is a block diagram of a personal computer having a key phone function according to the present invention, which is composed of a key phone card 400, a CPU 410, a memory 420, a sound card 430, a microphone 431, and a speaker 432. On the other hand, through the keyboard provided as an input device of a personal computer according to the present invention, a user can enter a phone number or select a desired function from a menu of a program for performing a function of a key phone.

3 to 5, the operation of the personal computer having the function of the key phone according to the present invention will be described. The key phone card 400 is a card that can be mounted in a universal slot of a personal computer. The key phone card 400 performs a function of a key phone telephone in a personal computer by performing data and voice interfacing between the connected exchange 100 and a personal computer. . The key card 400 is composed of an exchanger interface unit 401, a transmission unit 402, a codec 403 and a computer interface unit 404 as shown in FIG. The exchange interface unit 401 is composed of a transformer and a protection element, and interfaces signals transmitted and received between the digital private exchange 100 and a personal computer. The exchange interface unit 401 outputs a signal transmitted from the digital private exchange 100 to the transmission unit 402, and transmits a signal input from the transmission unit 402 to the digital private exchange 100. The transmitter 402 may be implemented with a DASL chip, and transmits voice and data transmitted and received through two voice channels and one data channel (2B + D) to the codec 403. If the personal computer equipped with the key card according to the present invention has a sound card for converting PCM voice data into an analog voice signal, the received PCM voice data is not directly passed through the codec 403. Send to card. The codec 403 converts the PCM voice data transmitted from the transmitter 402 into an analog voice signal and outputs it to the speaker 432. The codec 403 converts the voice signal input from the microphone 431 into PCM voice data and transmits it to the transmitter 402. The computer interface unit 404 is implemented with an address of the personal computer, a data bus, and decoding logic, and interfaces data transmitted and received between the CPU410 and the key card 400. The CPU410 is the main controller of the personal computer and controls the key card card 400 and the sound card 430 to implement the functions of a key phone telephone such as call origination and call. The memory 420 stores a control program required for the function of the key phone telephone as shown in FIG. The sound card 430 outputs voice data received from the key card card 400 to the speaker 432 and transmits the voice signal input from the microphone 431 to the key card card 400.

Figure 6 shows the process of performing the call-in / out function in the personal computer according to the present invention.

Referring to Figures 3 to 6 will be described a method for implementing the function of the key phone in a personal computer according to an embodiment of the present invention. In step 601, the CPU410 monitors a signal transmitted from the digital private exchange 100 connected through the key card 400 by performing the D channel protocol. In step 602, the CPU410 determines whether a ring signal is received from the digital private exchange 100 through the key phone card 400. When the ring signal is received, in step 603, the CPU410 pauses another program being executed in addition to the program that performs the function of the key-phone telephone according to the present invention. In step 604, the CPU410 loads and executes a program for performing a digital key phone function from the memory 420. In operation 605, the CPU410 controls the sound card 430 to generate ring sound and output the ring sound to the speaker 432. Then, the user using the personal computer according to the present invention listens to the ring sound output to the speaker 432, and selects the incoming call answering function from the program for performing the currently executed digital phone function when the user knows that the incoming call is answered. In step 606, the CPU410 determines whether an incoming call response function is selected based on key data input through a keyboard or a mouse. If the call answering function is selected, in step 607, the CPU410 transmits a hook-off message to the digital switch 100 through the key phone card 400. The digital switch 100 establishes a call path between the sender and the personal computer in response to the transmitted hook off message. In step 608, the CPU410 controls the key card 400 to output the voice signal transmitted from the digital switch 100 to the speaker 432 of the sound card 430, and the voice signal input through the microphone 431 from the user. To the phone card 400. In step 609, the CPU410 determines whether a key for selecting a call termination function according to a program for performing a function of a keypad phone is input from the keyboard. When a key for selecting the call termination function is input, in step 610, the CPU410 transmits a hook-on message to the digital switch 100 through the key phone card 400. In step 611, the CPU 410 terminates the call and performs the D channel protocol. Processes from step 601 to step 611 indicate an operation of detecting a call coming from a personal computer having a function of a key phone according to the present invention.

On the other hand, in step 612, the CPU410 determines whether a key for selecting a call function according to a program that performs a function of a key phone is input. That is, the user selects the calling function by executing the program of the function of the keypad phone to use the personal computer according to the present invention. When a key for selecting a calling function according to the present invention is input, in step 613, the CPU410 pauses the operation of the other program when another program is being executed in addition to the program for performing the function of the key phone. In operation 614, the CPU410 transmits a hook-off message to the digital switch 100 through the key phone card 400. Then, the user directly inputs the telephone number to be called by the keyboard or selects the telephone number registered in the program for performing the function of the keypad phone. In step 615, the CPU410 determines whether a phone number is input from the keyboard or a registered phone number is selected. When a phone number is input or a registered phone number is selected in step 615, the CPU410 transmits a phone number message corresponding to the input phone number or the selected phone number to the digital exchange 100 through the key phone card 400 in step 616. do. Then, the digital switch 100 dials the transmitted telephone number and notifies the key card 400 if there is a response from the dialed counterpart. In step 617, the CPU410 determines whether there is a response from the other party through the key card 400. If there is a response from the other party, the CPU410 performs an operation of step 608 to enter a call state with the other party. Processes from step 612 to step 617 represent an operation of making a call by making a call in a personal computer according to the present invention.

In addition, the personal computer according to the present invention performs the function of the key-phone telephone under the state that the power is always on. Therefore, in the case of power-off of all the computers connected in the digital private switching system according to the present invention, a general telephone can be installed one by one user group to designate a group ring incoming call and can be used in an emergency.

As described above, the present invention does not need to separately supply power by connecting a personal computer equipped with a key card in a digital private exchange system to perform a function of a digital key phone, and does not require a computer phone integrated module, thereby reducing costs. Can be.

Claims (4)

A personal computer connected to a digital private exchange, which functions as a digital key phone, A keyphone card for processing data and voice signals transmitted and received between the connected digital private exchange and the personal computer; A sound card having a predetermined speaker and a microphone to output a voice signal transmitted from the key card to the speaker, and to transmit a voice signal input from the microphone to the key card; A CPU for controlling the key card and the sound card to execute a program according to the function of the key phone; And a memory for storing a program according to the function of the key-phone telephone. The method of claim 1, wherein the key card is, An exchanger interface unit for interfacing voice and data to and from the digital private exchange; Outputting the voice received from the exchange interface unit to the sound card, transmitting data received from the exchange interface unit to the CPU, outputting the voice signal input from the sound card to the exchange interface unit, and outputting from the CPU A transmission unit for outputting input data to the exchange interface unit; A codec for converting the PCM voice data transmitted from the transmitter into an analog voice signal, converting the analog voice signal input from the sound card into PCM voice data and outputting the same to the transmitter; And a computer interface unit for performing an interface of an address and a data bus for transmitting data transmitted and received from the codec to the CPU. A method of controlling a personal computer having at least a keyphone card, a microphone, and a speaker connected to a digital private exchange to perform a function of a keyphone telephone, Determining whether a ring signal is received from the digital private exchange connected through the keyphone card; When the ring signal is received, the process of pausing other programs in addition to the function of the keypad phone, and Executing a program according to the function of the key-phone telephone and generating ring sound; Determining whether an incoming call answering function is selected in a menu of a program according to the function of the running key phone; If the incoming call answering function is selected, transmitting a hook-off message to a digital private exchange connected through the keyphone card; Forming a communication path with the other party connected through the key card, outputting a voice signal received through the key card to the speaker, and transmitting a voice signal input from the microphone through the key card; Determining whether a call termination function is selected in a program of the keypad phone; If the call termination function is selected, transmitting a hook-on message to the digital private exchange connected through the keyphone card and ending the call. A method of controlling a personal computer having at least a keyphone card, a microphone, and a speaker connected to a digital private exchange to perform a function of a keyphone telephone, Determining whether the calling function according to the program of the keypad phone is selected; If the calling function is selected, suspending other programs in addition to the function of the keypad phone, and sending a hook-off message to the digital private exchange connected through the keypad card; Transmitting a message of the input telephone number to a digital private exchange connected through the keyphone card if a predetermined telephone number is input after transmitting the hook-off message; Determining whether there is a response from the other party of the input telephone number; If there is a response from the other party, it forms a communication path with the other party connected through the key card, outputs a voice signal received through the key card to the speaker, and transmits a voice signal input from the microphone through the key card. Process, Determining whether a call termination function is selected in a program of the keypad phone; If the call termination function is selected, transmitting a hook-on message to the digital private exchange connected through the keyphone card and ending the call.