JPH05327983A - Facsimile communication controller - Google Patents

Abstract

PURPOSE:To make facsimile communication between a computer and a facsimile A or B with a few parts in small size at low cost possible by controlling a network control part and a circuit for mutually connecting the facsimiles A and B. CONSTITUTION:A loop closed end detection part 9 is connected with the facsimile RFAX on a remote side and a DC voltage generation part 11 generates electrical conditions the same as the ones in the case of connecting a public line at the facsimile LFAX on a local side. The network control part 8 is provided with the detection part 9, the generation part 11, a line DC closed end part 10 and electric circuits 12-19 for mutually connecting transmission/reception signals from the RFAX and the LFAX. The computer 2 and the control part 6 connected with the computer control the network control part 8 without switching over the public and local lines through a modulation part 7 mechanically. Thus, the facsimile communication between the computer 2 and the RFAX or the LFAX can be performed with a few parts in small size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote-side facsimile connected to a computer via a public line,
The present invention relates to a facsimile communication control device that mutually performs facsimile communication with a local facsimile connected to a computer via a local line.

[0002]

2. Description of the Related Art FIG. 7 is a diagram showing a conventional facsimile energization control device disclosed in, for example, Japanese Unexamined Patent Publication No. 1-179559, in which 2 is a computer (CPU),
3 is a remote side facsimile (RFAX) connected to a facsimile communication control device (FPC) 21 via a public line / exchange (EX) 5 and 4 is a public line / exchange (EX)
This is a local-side facsimile (LFAX) that directly connects to the facsimile communication control device 21 without going through 5.

The facsimile communication control device 21 has a control unit (PC) 22, a network control unit (NCU) 23 and a modulation / demodulation unit (MDM) 24. The network control unit 23 includes a line connection switching unit 25 and a dial pulse generation unit (DP) 2
6. Switching to connect the loop closure detection unit (LP) 27, the polarity reversal detection unit (PD) 28, the line use detection unit (BD) 29, and the public line 38 to either the dial pulse transmission line 37 or the signal line 39. And a switch (SWA) 32.

The line connection switching section 25 includes a loop closure detecting section (LD) 30 and a ringing signal sending section (IR).
31, the output signal line 41 from the modulation / demodulation unit 24 to the signal line 40
Switch (SWB) 33 connected to either the signal line 42 or the switch (SWC) for separating or connecting the local facsimile 4 and the public line / switch 5.
34, a changeover switch (SWD) 35 for connecting a signal line 44 serving as a local line connected to the local side facsimile 4 to either the signal line 43 or the signal line 45 connected to the public line / switch 5, and the signal line 45 closed in a loop. The configuration includes a changeover switch (SWE) 36 connected to either the signal line 46 connected to the connection detection unit 30 or the signal line 47 connected to the call signal transmission unit 31.

Next, the operation will be described. Normally, the switch 32 is in a state where the signal line 38 and the signal line 39 are connected, and the switch 34 is in a state where the signal line 40 and the signal line 43 are connected. Also, the switch 35
Indicates that the signal line 43 and the signal line 44 are connected. Therefore, the remote-side facsimile 3 is connected to the local-side facsimile 4 via the public line / switch 5, the switch 32, the line use detection unit 29, the switch 34, and the switch 35.
Can be used for normal inter-facsimile communication.

Next, an operation example of the facsimile communication control device 21 when transmitting information from the computer 2 to the local facsimile 4 will be described. In order for the computer 2 to transmit information to the local facsimile 4, the control unit 2
When the control unit 22 is activated, the control unit 22 first checks, via the line use detection unit 29, whether communication is being performed between the remote side facsimile machine 3 and the local side facsimile machine 4. When communication is not being performed between the remote side facsimile machine 3 and the local side facsimile machine 4, the switch 35 is switched to connect the signal line 44 and the signal line 45.

The switch 3 is connected so that the signal line 45 is connected to the signal line 47 for 1 second and connected to the signal line 46 for 2 seconds.
6 is switched at a constant cycle. Signal line 45 is signal line 47
The calling signal is sent from the calling signal sending unit 31 to the local facsimile 4 in one second connected to the. During the next 2 seconds when the signal line 45 is connected to the signal line 46, the loop closure detection unit 30 causes the local facsimile 4
And whether the loop is closed between the modulation and demodulation unit 24.

When the loop closure detecting section 30 detects the loop closure, the switch 36 stops the periodic switching and is fixed so that the signal line 45 and the signal line 46 are connected. Further, the switch 33 is switched so that the signal line 41 and the signal line 42 are connected.

In this state, the control unit 22 converts the information sent from the computer 2 into information suitable for facsimile communication, and the information is converted into CCITT recommendation T.264. According to the procedure of 30, the modulation / demodulation unit 24, the switch 33, the loop closure detection unit 3
0, the switch 36, and the switch 35 to send to the local facsimile 4.

After the communication is completed, the switch 35 is switched to connect the signal line 44 and the signal line 43 so that the remote facsimile 3 and the local facsimile 4 can communicate with each other.

The operation of the facsimile communication control device 21 when transmitting information from the facsimile 4 to the computer 2 is similar to the above, so that the switch 36 is connected to the signal line 44 so that the switch 35 is connected to the signal line 44. 45 and the signal line 46 are connected, and the switch 33 is switched so that the signal line 41 and the signal line 42 are connected. In this state, the computer 2 sends the information sent from the local facsimile 4 to the switches 35 and 3
6, loop closure detection unit 30, switch 33, modem unit 2
CCITT Recommendation T.4. Receive according to the procedure of 30.

Further, as the facsimile communication control device using a large number of changeover switches as described above, in addition to the above, there is also a device shown in, for example, Japanese Unexamined Patent Publication No. 1-181373.

[0013]

Since the conventional facsimile communication control apparatus is constructed as described above, it is connected to the computer 2 through a line by using a large number of switches 32 to 36 and the calling signal transmitting section 31. The remote side facsimile 3 or the local side facsimile 4 locally connected to the computer 2,
Connected to each other. Therefore, there is a problem in that the size of the entire device cannot be reduced and the price increases.

The present invention has been made to solve the above-mentioned problems, and since a facsimile installed near a computer is used as a scanner or a printer, a direct facsimile is used without using a public line. It is an object of the present invention to obtain a facsimile communication control device for connecting a computer to each other and performing mutual communication with a small number of parts which does not require a mechanical changeover switch and is small in size and inexpensive.

[0015]

A facsimile communication control apparatus according to the present invention comprises a network control unit having an electric circuit for interconnecting a transmission / reception signal from a remote side facsimile and a transmission / reception signal from a local side facsimile. The network control unit is controlled by the control unit connected to the computer via the modulation / demodulation unit.

[0016]

The control section of the facsimile communication control apparatus according to the present invention controls the network control section through the modulation section so that the facsimile can be transmitted between the computer and the remote side facsimile or the local side facsimile without performing mechanical switching. Enable communication.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a facsimile communication system according to an embodiment of the present invention. In FIG. 1, reference numeral 1 is a facsimile communication control device, and the facsimile communication control device 1 includes a computer 2 and a public line. The exchange 5 is connected. And in the public line / switch 5,
The remote facsimile 3, which is an unspecified communication destination, is connected. The remote side facsimile machine 3 is a conventional G3 standard facsimile machine that has been used conventionally. Further, a local side facsimile machine 4 which is a normal G3 standard facsimile machine is directly connected to the facsimile communication control apparatus 1.

FIG. 2 shows a circuit configuration of the facsimile communication control device 1. In the figure, 6 is a control unit for controlling dial pulse generation, line DC closing control, control of the modulation / demodulation unit 7 and an interface with the computer 2. The modulation / demodulation unit 7 is provided from the remote side facsimile machine 3 and the local side facsimile machine 4. A function of converting a received signal into a digital signal and a digital signal from the control section 6 into a transmission signal to a facsimile, and a tone signal generating function,
It has a DTMF signal generation function. 8 is a network control unit,
The network control unit 8 electrically generates a DC voltage similar to that of the public circuit / switch 5 to the loop closing detection unit 9, the line DC closing unit 10 also having a dial pulse generating function, and the local facsimile 4. DC voltage generator 11, DC pass coil 12, DC cut capacitors 13, 19, transformer 14, reception signal amplifier of remote side facsimile 3,
Transmitter signal amplifier 16 for both remote and local facsimiles 3, 4, local-side receive signal amplifier 17 for local-side facsimile 4, receive-signal AND amplifier 18 for remote-side / local-side facsimiles 3, 4, resistor 15
a, 17a, 18a, 18b, 18c. Further, in this embodiment, the portions indicated by the reference numerals 12 to 19 constitute an electric circuit for interconnecting transmission / reception signals from the remote side facsimile 3 or the local side facsimile 4. FIG. 3 shows a transmission / reception procedure between the respective devices when the remote side facsimile 3 calls the facsimile communication control device 1 and transmits the image information to the computer 2. The detailed description of FIG. 2 will be given according to the procedure of FIG.

First, when a call is made from the remote side facsimile 3, the loop closure detecting section 9 in the facsimile communication control section 1 detects this via the public line / switch 5 and informs the control section 6. .. The control unit 6 further informs the computer 2 that the incoming call has been detected. When the computer is ready for receiving operation, it returns a ready signal to the control unit 6. In response to this ready signal, the control unit 6 controls the line DC closing unit 10 to close the line and, at the same time, to the remote-side facsimile 3 via the public line / switch 5 to the C side.
The modulator / demodulator 7 is controlled to output the ED signal.

The CED signal output from the modulator / demodulator 7 is
It is sent to the remote-side facsimile 3 via the public line / switch 5 through the remote / local dual-purpose facsimile transmission signal amplifier 16, the resistor 15a, the transformer 14, and the DC cut capacitor 13 in sequence. Next, the control unit 6
Controls the modulator / demodulator 7 to send a DIS signal to the remote side facsimile 3.

On the other hand, the remote side facsimile machine 3 returns the DCS signal, and the phase adjustment / training signal tr and the TCF signal for the high speed model to the facsimile communication control device. These signals are DC cut capacitor 13, transformer 14, remote side facsimile 3
The signal is received by the modulation / demodulation unit 7 via the remote side reception signal amplifier 15 and the remote side / local side facsimile reception signal AND amplifier 18 and transmitted to the control unit 6.

The modem unit 7 executes the modem training as described above, and when the training is successful, it notifies the control unit 6, and the control unit 6 controls the modem unit 7 to send out the CFR signal. Next, the remote side facsimile 3 transmits the image information in which the data is compressed. This image information is received by the modulation / demodulation unit 7, passed to the control unit 6, and further passed to the computer 2.

When the remote side facsimile 3 finishes transmitting the image information, it sends out an EOP signal. When the control unit 6 receives the EOP signal, it notifies the computer 2 that all pages have been received, and when the EOP signal is received normally, controls the modulation / demodulation unit 7 to send the MCF signal to the remote side facsimile 3.

On the other hand, the remote side facsimile machine 3 sends a DCN signal to disconnect the line. The control unit 6 is DC
When the N signal is received, the line DC connection unit 10 is controlled to disconnect the line. When the computer 2 stores the sent image information in a storage device or the like and is notified that all pages have been received, when the reception result is normal, the control unit 6 sends a response indicating ready.
Return to. When the control unit 6 receives the response from the computer 2, the control unit 6 notifies the computer 2 of the end of the reception process and ends the incoming call process.

FIG. 4 shows a transmission / reception procedure between the respective devices when the image information is transmitted from the local facsimile 4 to the computer 2. The detailed description of FIG. 2 will be given according to the procedure of FIG. First, according to the program of the computer 2 or the operation of the operator, the computer 2 sends to the control unit 6 in the facsimile communication control device 1 a ready signal indicating that the operation preparation for the reception from the local facsimile 4 is completed. In response to this, the modem unit 7 is controlled to output the CED signal to the local facsimile 4.

The CED signal output from the modulator / demodulator 7 is
Remote / local transmission signal amplifier 16, resistance 1
7a, DC cut capacitor 19, DC voltage generator 11
Are sequentially transmitted to the local facsimile 4.
Next, the control unit 6 controls the modulation / demodulation unit 7 to send the DIS signal to the local facsimile 4.

At this time, the direct-current voltage is applied to the line connection terminal of the local-side facsimile 4 by the direct-current voltage generator 11 so that the electrical conditions are the same as when the public line is connected. Since the original document to be sent is set in 4, the transmission operation can be started by pressing the start button.

Upon receiving the CED signal and the DIS signal from the facsimile communication control device 1, the local facsimile 4 returns the DCS signal and the phase adjustment / training signal tr and the TCF signal for the high speed modem. These signals are DC cut capacitor 19, local side reception signal amplifier 17, reception signal AND amplifier 1
The signal is received by the modulation / demodulation unit 7 via 8 and transmitted to the control unit 6. Hereinafter, the same operation as the detailed description of FIG. 3 is performed.

FIG. 5 shows a transmission / reception procedure of each signal when the computer 2 makes a call to the remote side facsimile machine 3. In this case, the calling request is notified from the computer 2 to the control unit 6 by the program of the computer 2 or the operation of the operator. The destination telephone number information is added to this call request.

Upon receipt of this call request, the control unit 6 determines that the call is made through the public line / switch 5, and
The line DC closing unit 10 is controlled to close the line. At this time, the loop closure detection unit 9 is sure that the line is physically connected. If this cannot be confirmed, the operation ends here.

If the line is normally connected, then a dial signal is transmitted. Now, when the public line is a dial pulse line, by controlling the opening / closing of the line DC connection unit 10,
Send a predetermined dial pulse to the line. On the other hand, in the case of the PB line, the modulator / demodulator 7 having the DTMF signal generation function sends a predetermined DTMF signal. As a result, the remote facsimile 3 is called.

After a certain time elapses until the remote side facsimile machine 3 receives a call and connects to the line, the control unit 6 switches the public line
The modulator / demodulator 7 is controlled so as to output the CNG signal to the remote facsimile 3 via the exchange 5.

The CNG signal output from the modulator / demodulator 7 is
Remote / local transmission signal amplifier 16, resistance 1
5a, the transformer 14, the DC cut capacitor 13, and the public line / exchange 5 to the remote-side facsimile 3.

When the remote side facsimile machine 3 receives a call,
The CED signal and the DIS signal are transmitted with confidence in the CNG signal. The CED signal and the DIS signal are received by the modulation / demodulation unit 7 via the DC cut capacitor 13, the transformer 14, the remote side reception signal amplifier 15, and the reception signal AND amplifier 18, and are transmitted to the control unit 6.

The control unit 6 detects the CED signal,
Receive a DIS signal. Next, the control unit 6 controls the modulation / demodulation unit 7
To transmit the DCS signal, and the phase adjustment / training signal tr and the TCF signal for the high speed modem.
The remote side facsimile machine 3 thereby executes the modem training, and when the training is successful, it sends out the CFR signal.

When the control section 6 confirms this CFR signal,
A ready response is sent to the computer 2. Next, the computer 2 transmits the image information that has been data-compressed. The control section 6 controls the modulation / demodulation section 7 to transmit the transmitted image information to the remote side facsimile 3. And computer 2
When the page end is notified from, the modem unit 7 is controlled so as to send an EOP signal to the remote side facsimile machine 3.

When the remote side facsimile 3 normally receives the image information, it sends back the MCF signal. Upon receiving this, the control unit 6 sends a ready response to the computer 2. On the other hand, when the image information is completed, the computer 2 notifies the control unit 6 of the completion of the image information.

Here, the control unit 6 sends a DCN signal to the remote side facsimile 3 to control the line DC connection unit 10 so as to disconnect the line. Remote side facsimile 3 is D
Upon receiving the CN signal, the line is disconnected and the communication between the two ends.

FIG. 6 shows a transmission / reception procedure between the respective devices when image information is transmitted from the computer 2 to the local facsimile 4. In this case, the calling request is notified from the computer 2 to the control unit 6 by the program of the computer 2 or the operation of the operator. Local connection information is added to this call request.

At this time, the direct-current voltage is applied to the line connection terminal of the local facsimile 4 by the direct-current voltage generator 11 so that the electrical condition is the same as when the public line is connected. Since the original to be sent is not set in the side facsimile 4, the receiving operation is started by pressing the start button, and the CE
The D signal and the DIS signal are transmitted. These signals are DC cut capacitor 19, local side reception signal amplifier 1
7, received by the modulator / demodulator 7 via the reception signal AND amplifier 18 and transmitted to the controller 6. Hereinafter, the same operation as the detailed description of FIG. 5 is performed.

[0041]

As described above, according to the present invention, the electric circuit for interconnecting the transmission / reception signal from the remote side facsimile and the transmission / reception signal from the local side facsimile and the local side facsimile are equivalent to the public line. Since the network control unit having the power supply unit that generates the electrical condition is configured to be controlled by the control unit connected to the computer via the modulation / demodulation unit, without mechanical switching,
Facsimile communication is possible between a computer and a remote or local facsimile. As a result, the facsimile communication control device has an effect that it can be configured in a small size and at a low cost with a small number of parts.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a facsimile communication system according to the present invention.

FIG. 2 is a circuit configuration diagram of a facsimile communication control device according to the present invention.

FIG. 3 is a diagram showing a transmission / reception procedure between respective devices when image information is transmitted from a remote side facsimile to a computer.

FIG. 4 is a diagram showing a transmission / reception procedure between devices when transmitting image information from a local facsimile to a computer.

FIG. 5 is a diagram showing a transmission / reception procedure between each device when image information is transmitted from a computer to a remote facsimile.

FIG. 6 is a diagram showing a transmission / reception procedure between each device when image information is transmitted from a computer to a local facsimile.

FIG. 7 is a circuit configuration diagram of a conventional facsimile communication control device.

[Explanation of symbols]

 1 Facsimile Communication Control Device 2 Computer 3 Remote Facsimile 4 Local Facsimile 5 Public Line / Switch 6 Control Unit 7 Modulator / Demodulator 8 Network Control Unit 9 Loop Closure Detection Unit 10 Circuit DC Closure Unit 11 DC Voltage Generation Unit (Power Supply Unit) ) 12 DC pass coil 13, 19 DC cut capacitor 14 Transformer 15 Remote side reception signal amplifier 16 Remote / local both transmission signal amplifier 17 Local side reception signal amplifier 18 Reception signal AND amplifier

Claims (1)

[Claims] 1. A remote-side terminal for connecting a remote-side facsimile via a public line / switch, a loop closure detection unit connected to the remote-side terminal, and a local-side facsimile directly connected via a local line. A local side terminal, a power feeding section connected to the local side terminal, which generates the same electrical condition as when a public line is connected to the local side facsimile, and the remote side. A network control unit having a transmission / reception signal from a facsimile and an electric circuit interconnecting the transmission / reception signal from the local side facsimile, and a signal from the network control unit or the network control unit connected to the network control unit. Modulator / demodulator for modulating / demodulating a signal to and from the computer and the network controller via the modulator / demodulator connected to the computer and the modulator / demodulator. And a control unit for controlling the above, wherein facsimile communication is performed between the computer and the remote side facsimile or the local side facsimile without switching the connection to either the public line or the local line. Facsimile communication control device.