KR100197897B1 - Computer modem apparatus having a pbx function - Google Patents

Abstract

The present invention relates to a computer modem apparatus having a private switching function for making a telephone call by selectively connecting a trunk line connected to a computer modem to a plurality of extensions. When the ring signal is input through a trunk line, the present invention receives the ring signal, performs guide broadcast, and performs guide broadcast to input a DTMF (Dual Tone Multi Frequency) signal according to data communication, image communication, or telephone call. Determining whether it is data communication, image communication, or telephone call by DTMF signal input according to announcement, and receiving and processing data signal or image signal input through CO line in case of data communication or image communication, and in case of telephone call Connect the CO line to the station through the extension line to make a telephone call with each other.In addition, when the hook switch of the extension phone is turned off, the extension is connected to the CO line through the extension line to dial and dial a telephone number. .

Description

Computer modem device with private exchange function

The present invention relates to a computer modem apparatus having a private switching function for making a telephone call by selectively connecting a trunk line connected to a computer modem to a plurality of extensions.

With the development of the computer system, a computer system is provided with a modem, and only the predetermined data communication is performed using this modem.

Since only the data communication using a modem is very limited in its function, recently, facsimile communication and voice communication, which perform image communication as well as image communication, are performed.

If the trunk line is connected to such a modem, the telephone call cannot be performed.

Therefore, in the related art, when a data communication or image communication is performed, a telephone line is connected to a modem, and when a telephone call is made, a telephone line is connected by connecting a trunk line to a telephone.

However, the above-described conventional technology has a problem in that the user has to switch the trunk line in case of data communication, image communication, or telephone call, which causes a lot of inconvenience to the user.

Accordingly, an object of the present invention is to provide a computer modem apparatus having a private switching function to perform data communication and image communication using a modem as well as to perform a telephone call with an extension.

A computer modem apparatus having a private exchange function of the present invention for achieving the above object receives a ring signal when a ring signal is input through a trunk line, and performs announcement broadcast to perform DTMF (data communication or image communication or telephone call). Dual Tone Multi Frequency) determines whether it is data communication or image communication or telephone call, and receives and processes data communication or image communication input through CO line in case of data communication or image communication. It is characterized by dialing and making a telephone call by connecting an extension to a trunk line through an extension connection when the hook switch of the extension phone is turned off by connecting to an extension through an extension connection. .

1 is a circuit diagram showing the configuration of a computer modem apparatus having a private exchange function according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Surge protection part 2: Ring signal detection part

3: data conversion and interface section 4: hybrid circuit section

5: first relay driving unit 6: second relay driving unit

7: extension connection 71: switching unit

72: power supply unit 73: ring signal generation unit

74: busy signal generator 81 to 8N: off-hook detector

RYS1, RYS2: relay switch T: transmission transformer

L1, L2: CO line

Hereinafter, a computer modem apparatus having a private exchange function according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram showing the configuration of a computer modem apparatus having a private switching function of the present invention.

As shown therein, the surge protection unit 1 cuts off the surge voltage input through the trunk lines L1 and L2, and the ring signal input through the surge protection unit 1 from the trunk lines L1 and L2. When the ring signal detection unit 2 detects the ring signal, the ring signal detection unit 2 detects the ring signal, and transmits the ring signal detection unit 2 to a central processing unit (CPU: not shown in the figure) that controls the overall operation of the computer system. And a data conversion and interface unit 3 for interfacing control signals and data obtained from the central processing unit for image communication or a telephone call, and the data and transmission data through the data conversion and interface unit 3. TX) and the hybrid circuit unit 4 for interfacing the received data and the transmission transformer (T) and the transmission transformer (T) and the surge protection unit (1) are connected to each of the trunk line and switching of the internal connection The relay switches (RYS11, RYS12) (RYS21, RYS22) that perform the operation, and the relay switches (RYS11, RYS12) (RYS21, RYS22) under the control of the central processing unit obtained through the data conversion and interface unit 3. The data conversion and interface unit 3 is connected to the first and second relay driving units 5 and 6 for switching between the trunk lines L1 and L2 connected according to the switching of the relay switches RYS21 and RYS22. Under the control of the central processing unit through the station 1, station 2, ...., the station connection portion 7 for selectively connecting to the station N, and the hook-off of the station 1, station 2, ..., station N It is composed of an off-hook detection unit (81-8N) for detecting each and input to the modem (3) through the extension connection (7).

Here, the internal connection unit 7 includes a switching unit 71 for switching trunk lines and internal stations, a power supply unit 72 for supplying operation power, a ring signal generator 73 for generating a ring signal and outputting the ring signal to the internal station; In this case, the busy signal generator 74 generates a busy signal when a hook switch of a telephone of another station is turned off while one station occupies the trunk lines L1 and L2.

In the above, the relay switches RYS11 and RYS12 and RYS21 and RYS22 are interlocked with each other.

The computer modem apparatus having the private exchange function of the present invention configured as described above has a central processing unit that controls the entire operation of the computer system in a standby state in which no data communication, image communication and telephone call are performed. The control signal is generated through the unit 3 to control the first and second relay drivers 5 and 6 to connect the movable terminals of the relay switches RYS11 and RYS12 to the other fixed terminals b11 and b12, respectively. The movable terminals of the relay switches RYS21 and RYS22 are connected to the fixed terminals a21 and a22, respectively.

When the ring signal is input through the trunk lines L1 and L2 in this state, the input ring signal is input to the ring signal detection unit 2 through the surge protection unit 1.

Then, the ring signal detection unit 2 detects the ring signal and transmits it to the data conversion and interface unit 3, whereby the data conversion and interface unit 3 inputs the ring signal to the central processing unit. You will be notified.

In this state, the CPU determines the input of the ring signal as the output signal of the ring signal detector 2 interfaced by the data conversion and interface unit 3, and controls the first relay driver 5 to control the relay switch ( The movable terminals of RYS11 and RYS12 are connected to the fixed terminals a11 and a12 on one side, and the incoming lines, that is, the trunk lines L1 and L2, are the surge protection unit 1, the relay switches RYS11 and RYS12 (RYS21 and RYS22), The transmission transformer T and the hybrid circuit section 4 are sequentially connected to the data conversion and interface section 3.

When the CO lines L1 and L2 are received in this manner, the central processing unit outputs a voice signal by performing a guide broadcast through the data conversion and interface unit 3, and the output voice transmission signal TX is a hybrid circuit unit ( 4), it is output through the transmission transformer T, the relay switches RYS11 and RYS12 (RYS21 and RYS22) and the surge protection part 1.

For example, when a data communication or image communication is performed, a corresponding code is inputted, and when a telephone call is made, an extension number is input.

In this state, when the other party's communicator hears the announcement, selectively presses a key on the dialing keyboard, and the DTMF signal of the pressed key is input through the trunk lines L1 and L2, the input DTMF signal is transmitted to the surge protection unit 1. The relay switches RYS21 and RYS22 (RYS11 and RYS12), the transmission transformer T and the hybrid circuit section 4, and the data conversion and interface section 3 are sequentially input to the central processing unit.

The central processing unit then determines whether it is data communication, image communication or telephone call using the input DTMF signal.

At this time, in the case of data communication or image communication, the central processing unit maintains the relay switches RYS11 and RYS12 (RYS21 and RYS22) in the current state through the data conversion and interface unit 3, that is, the relay switches RYS11 and RYS12. The movable terminals of (RYS21, RYS22) are continuously connected to the fixed terminals (a11, a12) (a21, a22) so that the data conversion and interface unit 3 and the trunk lines (L1, L2) are connected, and data communication or image communication Do this.

In the case of a telephone call, the central processing unit generates a control signal through the data conversion and interface unit 3, and the ring signal generation unit 73 of the extension connection unit 7 is controlled by the interface control signal. The ring signal is output to the extension 1, extension 2, ..., or extension N according to the input extension number.

In this state, when the station 1, station 2, ..., or station N, which the ring signal output unit 73 outputs the ring signal, arrives, the off hook detection units 81, 82, ..., 8N are received. It is detected and input to the data conversion and interface unit 3 through the extension connection unit 7, and the off-hook detection signal through the data conversion and interface unit 3 is input to the central processing unit.

Then, the central processing unit determines that the extension has been received and connects the trunk lines L1 and L2 with the received extension through the switching unit 71 of the extension connection unit 7 to perform a telephone call with each other. The processing apparatus controls the first relay driver 5 to control the relay switches RYS11 and RYS12 to their original positions, that is, the movable terminals are connected to the fixed terminals b11 and b12.

In this state of making a telephone call, when another station picks up the handset of the telephone and turns off the hook switch, the off hook detection unit 81, 82, ..., 8N detects this and converts the data through the extension connector 7. And input to the interface unit 3, and the data conversion and interface unit 3 interfaces it to the central processing unit.

Then, the CPU determines that the hook switch of the other station is turned off, generates a busy signal by controlling the busy signal generator 74 of the extension connector 7, and outputs the generated busy signal to another hooked off station. Will notify you that you are on the phone.

When the telephone call is completed in this state and the hook switch is turned on by turning off the handset, the CPU determines that the hook switch is turned on again by the output signal of the hook-off detection unit 81-8N, and the extension connector 7 Will return to normal.

On the other hand, if the hook switch is turned off by lifting the handset of the telephone of the extension when making a telephone call at the extension, the hook-off detection unit 81-8N detects this, and the data conversion and interface unit ( 3).

The signal inputted to the data conversion and interface unit 3 is interfaced to a central processing unit, and the central processing unit controls the second relay control unit 6 so that the movable terminals of the relay switches RYS21 and RYS22 are fixed terminals ( a21, a22, and the data conversion and interface unit 3 is connected via the hybrid circuit unit 4 transmission transformer T, relay switches RYS11, RYS12, RYS21, RYS22, and surge protection unit 1. To (L1, L2).

In such a state, when the telephone number to be dialed in the extension is dialed, the DTMF signal is output through the data conversion and interface unit 3 according to the dialed telephone number, and the DTMF signal is output as the hybrid circuit unit 4, It is output to trunk lines L1 and L2 via transmission transformer T, relay switches RYS11 and RYS12 (RYS21 and RYS22) and surge protection unit 1. FIG.

When the other party's telephone to be called on the phone receives the trunk lines L1 and L2, the central processing unit transmits the movable terminals of the relay switches RYS21 and RYS22 through the data conversion and interface unit 3 to the fixed terminals b21 and b22. It connects to the station, and the station is connected to the station through the switching unit 71 of the station connection unit 7 to control the telephone call.

As described above, the present invention can make a telephone call by performing a private exchange with an extension in a computer modem. As a result, there is no need for a separate exchange, and the user can make a trunk line according to data communication and image communication or telephone call. Eliminate the hassle of switching.

Claims (3)

A surge protection unit 1 for blocking a surge voltage input through trunk lines L1 and L2, and a ring signal detection unit for detecting a ring signal input through surge protection unit 1 at the trunk lines L1 and L2; 2) and, when the ring signal detection unit 2 detects a ring signal, transmits it to a central processing unit (CPU) that controls the overall operation of the computer system, and the central processing unit for data communication, image communication or telephone call. A data conversion and interface unit 3 for interfacing control signals and data obtained from a device CPU, and the central processing unit CPU, transmission data TX, and received data through the data conversion and interface unit 3. Relay switch (RYS11) connected between the hybrid circuit unit 4 and the transmission transformer T for interfacing, and the transmission transformer T and the surge protection unit 1 to perform incoming switching and connection switching of each station. , RYS1 2) first and second switching the relay switches RYS11 and RYS12 and RYS21 and RYS22 according to (RYS21 and RYS22) and the control of the central processing unit obtained through the data conversion and interface unit 3; The relay lines 5 and 6 and the trunk lines L1 and L2 connected according to the switching of the relay switches RYS21 and RYS22 are controlled by the central processing unit through the data conversion and interface unit 3. 1, extensions 2, ..., and the internal connection portion 7 selectively connected to the extension N, and the hook-off of the extension 1, extension 2, ..., extension N is respectively detected to detect the extension connection portion 7 A computer modem apparatus having a private exchange function, characterized in that it comprises an off-hook detection section (81-8N) for inputting to a modem (3). According to claim 1, wherein the internal connection unit 7, the switching unit 71 for switching the trunk line and the station, the power supply unit 72 for supplying the operating power, and the ring signal generation to generate a ring signal and output to the internal station Busy signal generator 74 for generating a busy signal when the hook switch of the telephone of another station is turned off while the station 73 occupies the trunk lines L1 and L2 and is busy. Computer modem apparatus having a private exchange function, characterized in that consisting of. The computer modem apparatus according to claim 1, wherein the relay switches (RYS11, RYS12) (RYS21, RYS22) are interlocked with each other.