KR950010480B1 - Keypone system and general phone interface device - Google Patents

Abstract

The apparatus comprises a central processing unit, a central processing unit resetting unit, power, a sound transmission/reception unit, a call circuit switching unit, a first sound combining unit, a loop sensing unit, a signal tone generating unit, a DTMF signal receiving unit, a data transmission/reception unit, a data transmission unit, a data comparison unit, a second sound combining unit, a call signal generating unit, and an outputting unit.

Description

Keypad system and connection device and method

1 is a connection circuit diagram of a general telephone and a cordless telephone.

2 is a connection circuit diagram of a keyphone main device.

3 is a block diagram of a connection device according to the present invention.

4 is a flow chart of processing on a call from a regular telephone or a cordless telephone.

5 is a flow chart of processing when a call is made from the keyphone main unit.

* Explanation of symbols for main parts of the drawings

14 Keyphone Main Unit 15 Central Processing Unit (CPU)

16: general telephone and wireless telephone 17: DC bias circuit

18: loop detection circuit section 19, 27: voice coupling transformer section

20: data transmission circuit section 21: data transmission circuit section

22: reception data comparison circuit unit 23: call circuit unit

24: signal tone generating circuit

25: DTMF (DUAL TONE MULTIFREQUENCY) signal receiving circuit

26: call signal generation circuit section 28: central processing unit (CPU) reset section

29: speaker

The present invention relates to a connection device and a method required for connecting and using a general telephone or a cordless telephone to a key phone system.

In general, a key phone system is used by connecting a dedicated phone suitable for the system, and in order to use a regular phone or a cordless phone, a connection circuit must be built in the key phone main unit. Since the connection characteristics of the circuit are determined and the call signal generation circuit must be built in order to give a call signal to a general telephone or a cordless telephone, there is a problem in that the cost is high and there is no diversity in system configuration.

Accordingly, an object of the present invention is to provide a connection device and method necessary when a general telephone or a wireless telephone is connected to a key phone system for use.

The apparatus of the present invention for achieving the above object, the key phone main device for managing the key phone system; A central processing unit (CPU) for controlling a circuit according to a predetermined program and detecting a signal; Central processing means (CPU) reset means for providing a reset signal to said central processing means (CPU); Power supply means for supplying DC power; Voice transmission / reception means for receiving power from the power supply means; Communication circuit switching means for turning on / off a communication circuit between the key phone main unit and the voice transmission / reception means under the control of the central processing means; First voice combining means connected between said voice transmitting and receiving means and a telephone circuit switching means for coupling a voice signal; Loop detection means connected between said voice transmission and reception means and a central processing means (CPU) for detecting a state of a handset and detecting a dial pulse; Signal tone generating means for generating various signal tones to the voice transmitting / receiving means according to a communication circuit state under the control of the central processing means (CPU) and transmitting them through the first voice combining means; DTMF signal receiving means for receiving a dual tone multi frequency (DTMF) signal from the voice transmitting and receiving means through the first voice combining means, converting the digital data into digital data, and sending the same to the central processing means (CPU); Data transmission / reception means connected to the keyphone main device by a data transmission / reception transformer; Data transmitting means for transmitting data from the central processing means (CPU) to the data transmitting and receiving means; Receiving data comparing means for receiving data from the data transmitting and receiving means and comparing the received data to the central processing means (CPU); Second voice coupling means connected to said key phone main unit and said telephone circuit switching means to couple voice signals; Call signal generating means connected to said central processing means (CPU) to generate a call signal in response to a call request coming from said key phone main unit through said data transmitting / receiving means; And output means connected to the call signal generating means and outputting the output to the outside.

The method of the present invention for achieving the above object is a method applied to the connection device between the keyphone system and the telephone; The user picks up the handset of the telephone to make a call and detects the output of the loop detection means and sends off-hook data to the keyphone main unit to inform the keyphone main body of the hookswitch status and informs the phone that dialing is possible. A first step of driving said signal tone generating means to generate dialing; After performing the first step, when the user selects a target (call line, extension) to be called with a dial button, the DTMF signal generated is inputted to the DTMF signal receiving means through the first voice combining means and decoded. A second step in which the central processing means reads out the dial tone which is being generated and transmits the call request data of the call target to the key phone main unit; And after performing the second step, the keyphone assertion informs the central processing means that the caller is connected when the callable party is connectable, so that the call state is established, and if the connection is not possible, a busy signal. And a third step of notifying the central processing means to generate a busy signal to the telephone, and another method may be provided when the telephone line main device notifies the central processing means that a trunk line or an extension call has occurred. A first step of driving the call signal generating means and outputting it through the output means so that a user can recognize the call; After performing the first step, when the user off-hooks the telephone, the central processing means detects this and immediately stops the generation of the call signal and notifies the keyphone main unit that it is off-hook; And after the second step is performed, the keyphone assertion is made out of a call reception state of a trunk line or an extension and the call state is established and the central processing means turns on a call circuit by informing the central processing means that the corresponding call path is connected. And a third step of creating a state.

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

1 is a connection circuit diagram of a general telephone and a cordless telephone.

In the figure, 1 denotes a central processing unit (CPU), 2 denotes a general telephone and a cordless telephone, 3 denotes a loop sensing circuit, 4 denotes a direct current (DC) bias circuit, 5 denotes a voice coupling transformer, and 6 denotes a call circuit.

As shown in the figure, a direct current (DC) bias circuit section 4 supplies direct current (DC) power for the operation of a general telephone and a cordless telephone (2), and the loop detection circuit section (3) receives a handset connected to a connection device. Detect the dial pulse by detecting the state of. The voice signals of the ordinary telephone and the cordless telephone 2 are transmitted by the voice coupling transformer 5 and are blocked or transmitted by the ON / OFF signal of the call circuit 6. The voice signal (AC current) passes and the direct current (DC) voltage is cut off by a capacitor connected between the voice coupling transformer unit 5 and the ordinary telephone and the wireless telephone 2.

2 is a connection circuit diagram of a keyphone main device.

In the figure, 7 is a key phone main unit, 8 is a central processing unit (CPU), 9 is a voice coupling transformer unit, 10 is a call circuit unit, 11 is a data transmission and reception coupling unit, 12 is a data transmission circuit unit, 13 is a receiving data comparison circuit unit Represent each.

As shown in the figure, the key phone main connection circuit is divided into a voice call circuit and a data transmission / reception circuit.

The data transmission / reception circuit is connected to the key phone main unit 7 by a data transmission / reception coupling transformer 11, and the output data of the transmission / reception coupling transformer 11 is converted into digital data by a predetermined form in the reception data comparison circuit unit 13. The output data of the central processing autonomous 8 is transmitted to the reference main unit 7 through current amplification in the data transmission circuit unit 12. The voice call circuit is connected to the key phone main unit 7 by a voice coupling transformer 9.

3 is a configuration diagram of a connection device according to the present invention.

In the figure, 14 is a keyphone main unit, 15 is a central processing unit (CPU), 16 is a standard telephone and a cordless telephone, 17 is a direct current (DC) bias circuit portion, 18 is a loop sensing circuit portion, 19, 27 is a voice coupling transformer portion, 20 Is a data transmission / reception circuit section, 21 is a data transmission circuit section, 22 is a receiving data comparison circuit section, 23 is a calling circuit section, 24 is a signal tone generating circuit section, 25 is a DTMF (DUAL TONE MULTIFREQUENCY) signal receiving circuit section, 26 is a call signal generating circuit section, 28 Is a central processing unit (CPU) reset unit, and 29 is a speaker, respectively.

The present invention provides a key phone main unit (14) for managing a key phone system, a central processing unit (CPU) 15 for controlling a circuit and detecting a signal according to each situation according to a predetermined program, and the central processing unit (CPU) ( 15 to supply a reset signal to the central processing unit (CPU) reset section 28, a direct current (DC) bias circuit section 17 for supplying a direct current power supply, and the direct current (DC) bias circuit section 17. A telephone circuit unit for turning on / off a telephone circuit between the telephone main device 14 and the telephone and wireless telephone 16 under the control of the telephone and the cordless telephone 16 to be supplied; 23, a voice coupling transformer unit 27 connected between the ordinary telephone and the cordless telephone 16 and the call circuit unit 23, for coupling a voice signal, the ordinary telephone and the cordless telephone 16, and the central processing unit. The state of the handset connected between the devices (CPUs) 15 Loop signal sensing unit 18 for detecting dial pulses and the central processing unit (CPU) 15 are controlled to generate various signal tones in the ordinary telephone and the wireless telephone 16 according to the call circuit state. Receives the digital signal tone generation circuit 24 sent through the voice coupling transformer 27 and the DTMF signals from the general telephone and the wireless telephone 16 through the voice coupling frame 27 and receives the digital signal. A DTMF signal receiving circuit section 25 for converting the data into the CPU 15, and a data transmitting / receiving circuit section 20 connected to the key phone main unit 14 by a data transmission / reception transformer; A data transmission circuit section 21 for transmitting data from the CPU 15 to the circuit section 20, and a data transmission circuit section 20 connected to the CPU 15; A reception data comparison circuit section 22 for receiving data from and comparing the received data, a voice coupling transformer section 19 connected between the key phone main unit 14 and the call circuit section 23 for coupling a voice signal, A call signal generation circuit unit 26 connected to the central processing unit (CPU) 15 to generate a call signal in response to a call request coming from the key transceiver main unit 14 through the data transmission / reception circuit unit 20, and the call signal It is provided with a speaker 29 connected to the generating circuit section 26 to send output to the outside.

The operation of the present invention having the above configuration will be described below with reference to the central processing unit 15.

First, in the case where the phone main unit 14 is called by the regular telephone and the cordless telephone 16, the loop sensing circuit unit 18 detects whether the telephone and the main telephone unit 16 are in the hook-off state, and the central processing unit is detected. 15, the central processing unit 15 controls the signal tone generating circuit 24 to generate a signal signal to be transmitted to the ordinary telephone and the wireless telephone 16 through the voice coupling transformer 27. To help.

The user presses the dial when the signal signal rings and the DTMF signal receiving circuit 25 sends the signal of the natural frequency to the central processing unit 15 accordingly.

The central processing unit 15 transmits data to the keyphone main unit 14 through the data transmitting circuit unit 21 and the data transmitting / receiving circuit unit 20 and receives data on the state of the keyphone main unit 14 (user call enabled state). It receives through the data comparison circuit part 22. FIG. The central processing unit 15 then controls the call circuit unit 23 so as to connect the lines so that the call can be made between the key phone main unit 14 and the ordinary telephone and the wireless telephone 16. Then, after some time elapses, a loop between the key phone main unit 14, the normal telephone, and the wireless telephone 16 is sensed to detect whether the call has ended.

In the case where the key phone main unit 14 calls the ordinary telephone and the cordless phone 16, the key phone main unit 14 sends data to the central processing unit 15 through the received data comparison circuit 22. Numeral 15 controls the call signal generation circuit 26 to generate a call signal. When the call signal generation circuit unit 26 generates a call signal, the user of the ordinary telephone and the cordless telephone 16 hears this and lifts the handset. The central processing unit 15 switches the hook on / off state through the loop sensing circuit unit 18. Detect. If the hook-off state, the call signal generating circuit unit 26 is controlled to stop the call signal generation, and then the call circuit unit 23 is controlled to enable a call between the key phone main unit 14 and the ordinary telephone and the wireless telephone 16. do.

4 is a process from the call when the call to the CO line or extension from the ordinary telephone or the cordless telephone 16 to the end of the call, and FIG. 5 is when a CO line or extension call occurs from the key phone main device to the telephone. It shows the process from call to end of call.

First, referring to FIG. 4, when the user lifts the handset of the telephone to make a call, the user detects the output of the loop detection circuit 18, and the off-hook data is transmitted to the keyphone main unit 14 to inform the keyphone main unit 14 of the hook switch. 14 to generate a dial tone by driving signal tone generating circuitry 24 to transmit to the phone and to inform the telephone that dialing is possible. The user selects a target (call line, extension) to be called with a dial button, and the DTMF signal generated at this time is input to the DTMF signal receiving circuit unit 25 via the voice combining transformer unit 27 and the decoded value is transmitted to the central processing unit. (15) is read. At this time, the generated dial tone is stopped and the call request data of the call target is transmitted to the key phone main unit 14. The key phone main unit 14 is known to the connected device when the call target is connectable, so that the call state can be established. If the connection is not possible, the busy signal is informed to the access device so that the access device generates a busy signal to the telephone. In the call state, if the user puts the phone on hook after the call, it detects this and turns off the call circuit.

Referring to FIG. 5, when the phone line main unit 14 notifies that the CO line or extension call has occurred from the key phone main device 14 to the access device, the access device drives the call signal generation circuit unit 26 to recognize the call sound so that the speaker ( 29). At this time, when the user off-hooks the phone, the connection device detects this and immediately stops the generation of the call signal and notifies the key phone main unit 14 that it is off-hook. The key phone main unit 14 makes a call state out of a call reception state of a trunk line or an extension and informs the access device that the corresponding call path is connected, and the access device turns on the call circuit to make a call state. When the user ends the call in the call state and then hooks up the telephone, the loop detection circuit 18 detects this and turns off the call circuit 23.

Therefore, when the above connection device is developed, it is possible to connect and use a general telephone or a cordless telephone without changing the keyphone main circuit, so that a call signal is generated by itself. There is no need for signal generation circuit and it is easy to replace dedicated telephone and connection unit without separate wiring.

Claims (5)

A key phone main unit for managing the key phone system; A central processing unit (CPU) for controlling a circuit according to a predetermined program and detecting a signal; Central processing unit (CPU) reset means for providing a reset signal to said central processing means (CPU); Power supply means for supplying DC power; Voice transmission / reception means for receiving power from the power supply means; Communication circuit switching means for turning on / off a communication circuit between the key phone main unit and the voice transmission / reception means under the control of the central processing means; First voice combining means connected between said voice transmitting and receiving means and a telephone circuit switching means for coupling a voice signal; Loop detection means connected between said voice transmission and reception means and a central processing means (CPU) for detecting a state of a handset and detecting a dial pulse; Signal tone generating means for generating various signal tones to the voice transmitting / receiving means according to a communication circuit state under the control of the central processing means (CPU) and transmitting them through the first voice combining means; DTMF signal receiving means for receiving a dual tone multi frequency (DTMF) signal from the voice transmitting and receiving means through the first voice combining means, converting the digital data into digital data, and sending the same to the central processing means (CPU); Data transmitting / receiving means connected to said keyphone main unit by data transmitting / receiving transformer; Data transmitting means for transmitting data from the central processing means (CPU) to the data transmitting and receiving means; Reception data comparison means for receiving data from the data transmission / reception means and comparing the received data to the central processing means (CPU); Second voice coupling means connected between the key phone main unit and the telephone circuit switching means to couple a voice signal; Call signal generating means connected to said central processing means (CPU) to generate a call signal in response to a call request coming from said key phone main unit through said data transmitting / receiving means; And an output means connected to the call signal generating means and outputting the output to the outside. A key phone main unit for managing the key phone system; A central processing unit (CPU) for controlling a circuit according to a predetermined program and detecting a signal; Central processing unit (CPU) reset means for providing a reset signal to said central processing means (CPU); Power supply means for supplying DC power; Voice transmission / reception means for receiving power from the power supply means; Communication circuit switching means for turning on / off a communication circuit between the key phone main unit and the voice transmission / reception means under the control of the central processing means; First voice combining means connected between said voice transmitting and receiving means and a telephone circuit switching means for coupling a voice signal; Loop detection means connected between said voice transmission and reception means and a central processing means (CPU) for detecting a state of a handset and detecting a dial pulse; Signal tone generating means for generating various signal tones to the voice transmitting / receiving means according to a communication circuit state under the control of the central processing means (CPU) and transmitting them through the first voice combining means; DTMF signal receiving means for receiving a dual tone multi frequency (DTMF) signal from the voice transmitting and receiving means through the first voice combining means, converting the digital data into digital data, and sending the same to the central processing means (CPU); Data transmitting / receiving means connected to said keyphone main unit by data transmitting / receiving transformer; Data transmitting means for transmitting data from the central processing means (CPU) to the data transmitting and receiving means; Receiving data comparing means for receiving data from the data transmitting and receiving means and comparing the received data to the central processing means (CPU); Second voice coupling means connected to said key phone main unit and said telephone circuit switching means to couple voice signals; Call signal generating means connected to said central processing means (CPU) to generate a call signal in response to a call request coming from said key phone main unit through said data transmitting / receiving means; And an output means connected to the call signal generating means and outputting the output to the outside, wherein the user picks up the handset of the telephone for the call and senses the output of the loop detecting means. A first step of generating a dial tone by driving said signal tone generating means to transmit off-hook data to said keyphone main unit to inform the keyphone main state of the keyphone and to inform the telephone that dialing is possible; After performing the first step, when the user selects a target (call line, extension) to be called with a dial button, the DTMF signal generated is inputted to the DTMF signal receiving means through the first voice combining means and decoded. A second step in which the central processing means reads out the dial tone which is being generated and transmits the call request data of the call target to the key phone main unit; And after performing the second step, the keyphone assertion value is known to the central processing unit when the call target is connectable, and the call state is established. If the connection is not possible, a busy signal is established. And a third step of informing the central processing means to generate a busy signal to the telephone. The method according to claim 2, further comprising a fourth step of detecting when the user puts the telephone on hook after the call is finished and turning off the telephone circuit. A key phone main unit for managing the key phone system; A central processing unit (CPU) for controlling a circuit according to a predetermined program and detecting a signal; Central processing unit (CPU) reset means for providing a reset signal to said central processing means (CPU); Power supply means for supplying DC power; Voice transmission / reception means for receiving power from the power supply means; Communication circuit switching means for turning on / off a communication circuit between the key phone main unit and the voice transmission / reception means under the control of the central processing means; First voice combining means connected between said voice transmitting and receiving means and a telephone circuit switching means for coupling a voice signal; Loop detection means connected between said voice transmission and reception means and a central processing means (CPU) for detecting a state of a handset and detecting a dial pulse; Signal tone generating means for generating various signal tones to the voice transmitting / receiving means according to a communication circuit state under the control of the central processing means (CPU) and transmitting them through the first voice combining means; DTMF signal receiving means for receiving a dual tone multi frequency (DTMF) signal from the voice transmitting and receiving means through the first voice combining means, converting the digital data into digital data, and sending the same to the central processing means (CPU); Data transmitting / receiving means connected to said keyphone main unit by data transmitting / receiving transformer; Data transmitting means for transmitting data from the central processing means (CPU) to the data transmitting and receiving means; Receiving data comparing means for receiving data from the data transmitting and receiving means and comparing the received data to the central processing means (CPU); Second voice coupling means connected to said key phone main unit and said telephone circuit switching means to couple voice signals; Call signal generating means connected to said central processing means (CPU) to generate a call signal in response to a call request coming from said key phone main unit through said data transmitting / receiving means; And an output means connected to the call signal generating means and outputting the output to the outside, wherein the central processing means is a user when the chief telephone main device notifies that the CO line or an extension call has occurred. A first step of driving the call signal generating means and outputting the call signal through the output means so that the call sound can be recognized; After performing the first step, when the user off-hooks the telephone, the central processing means detects this and immediately stops the generation of the call signal and notifies the keyphone main unit that it is off-hook; And after the second step is performed, the keyphone assertion is made out of a call reception state of a trunk line or an extension and the call state is established and the central processing means turns on a call circuit by informing the central processing means that the corresponding call path is connected. And a third step of creating a state. 5. The key phone system according to claim 4, further comprising a fourth step of detecting, by the loop detecting means, off the circuit switching means when the user puts the telephone on hook after the call is over in the call state. And connection method with telephone.