JPH01179559A - Facsimile communication control device - Google Patents

Abstract

PURPOSE:To execute transmission to a facsimile near a electronic computer without being through a public line by transmitting information with coupling any two of the facsimile, which is connected to a local line, the facsimile to be connected to the public line and the electronic computer. CONSTITUTION:A line connection switching part 6 normally connects the public line and local line. Thus, between the facsimile to be connected to the public line and the facsimile to be connected to the local line, the transmission of the information can be mutually executed. When the transmission of the information is mutually executed between the facsimile in a distant place, namely, the facsimile to be connected to the public line and the electronic computer, a network control part 4 and the public line are connected. When the transmission of the information is mutually executed between the facsimile to be connected to the local line and the electronic computer, the network control part 4 and the local line are connected. Thus, by switching the line, the transmission of the information can be executed even with the facsimile in the distant place or the facsimile just near the electronic computer without deteriorating of the original using method of the facsimile.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a facsimile communication control device, and in particular, to a device for connecting a computer and a facsimile, and for mutually transmitting information between the computer and the facsimile. The present invention relates to a facsimile communication control device suitable for performing facsimile communication.

[Conventional technology]

Conventional devices transmitted information from a computer to a facsimile connected to a public telephone line. However, this method had the disadvantage of requiring the use of public telephone lines even when sending information to a facsimile machine installed close to the computer, resulting in high communication charges. . On the other hand, in order to directly connect a facsimile to a computer system, a dedicated interface circuit is required, which cannot be achieved with a general-purpose facsimile.

Note that related devices of this type include, for example, Japanese Unexamined Patent Publication No. 173970/1983.

[Problem to be solved by the invention]

The above-mentioned prior art only takes into account the transmission of information to a facsimile at a remote location.

With this method, even when outputting information to a facsimile machine installed close to an electronic 1-segment machine, you have to use a public line, so there is no need for communication charges.
The purpose of the present invention is to directly connect a computer and a facsimile without using a public telephone line when outputting information to a facsimile installed close to a computer. By connecting, the above disadvantages can be solved, and at the same time, the line connection can be switched according to commands from the computer, and information can be output to a remote facsimile machine as in the past, or information can be exchanged between normal facsimile machines. The purpose is to enable the transmission of

[Means to solve the problem]

The above purpose is to provide a line connection switching unit that selects and connects two parts out of three parts: the network control unit, the public line connection unit, and the local line connection unit, and performs the above connection switching based on instructions from a computer. This can be achieved by outputting from the line connection switching section a signal that is the same as or equivalent to the ringing tone output from the exchange in order to perform a reception operation when transmitting information to a facsimile machine connected to the local line.

[Effect]

The line connection switching section usually connects the public line and the local line. Therefore, information can be mutually transmitted between a facsimile machine connected to a public line and a facsimile machine connected to a local line.

When transmitting information between a facsimile at a remote location, that is, a facsimile connected to a public line, and a computer, the network control unit and the public line are connected.

When mutually transmitting information between a facsimile connected to a local line and a computer, the network control unit and the local line are connected.

By switching the line as described above, it is possible to transmit information between a facsimile at a remote location and a facsimile located close to a computer without impairing the original method of using the facsimile.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, 1 is an electronic computer (CPU).

2 is a control device (FPC), and 3 is a control unit (PC).

4 is a network control unit (NCU), and 5 is a modulation/demodulation unit (MDM).

6 is the line connection switching unit (SC), 7 is the exchange 4! &(EX)
.

8 is a facsimile (RFAX) connected to the control device (FPC) 2 via the exchange (EX) 7; 9 is the exchange (EX)
)7 is a facsimile (LFAX) directly connected to the control device (FPC) 2, 10 is a dial pulse generator (DP), 11 is a loop closing unit (LP), 12 is a polarity reversal detection unit (P D ).

13 is a line usage detection section (BD), 14 is a loop closure detection section (LD), and 15 is a calling signal transmission section (IR).

16 is the public line 22, dial pulse sending line 21,
A changeover switch (SWA) 17 for connecting to either the signal line 23 is a switch for connecting the output signal line 25 from the modulator/demodulator (MDM) 5 to either the signal line 24 or the signal line 26. 18 is a switch (SWC) for separating or connecting the '77 fax machine (LFAX) 9 and the exchange (EX) 7; 19 is a signal line 28 connecting to the facsimile (LFAX) 9; switch(
The signal line 27 connected to EX) 7 or the calling signal transmitter (I
R) 15 or a signal line 29 connected to the loop closure detection unit (LD) 14, a switch (SWD) 20 connects the signal line 3° to the calling signal sending unit (I
This is a switch (SWE) for connecting to either the loop closure detection section (LD) 14 or the loop closure detection section (LD) 14.

The switch (SWA) 16 normally connects the signal line 22 and the signal line 2.
3 is connected. Switch (SWC) 1
8 is in a state where the signal line 24 and the signal line 27 are normally connected. The switch (SWD) 19 is normally connected to the signal line 27
and the signal line 28 are connected. In this state, the facsimile (RFAX) 8 is
．． Switch (SWA) 16, line usage detection unit (BD) 1
4. Switch (SWC) 18 and switch (SWD)
It is possible to connect to a facsimile (LFAX) 9 via 19. Therefore, the facsimile (LFAX) 9 directly connected to the control LJ[(FPC) 2 can be used for normal communication between facsimiles.

Next, from the electronic computer (CPU) 1 to the facsimile (RF)
AX) Control device (FPC) 2 when transmitting information to '8
An example of the operation will be explained using FIG.

First, the electronic computer (CPU) 1 sends a facsimile (RF)
In order to transmit information to AX) 8, control unit (PC) 3 is activated (step 32).

The control unit (PC) 3 first includes a line usage detection unit (BD).
It is checked whether communication is occurring between the facsimile (RFAX) 8 and the facsimile (LFAX) 9 via the facsimile (RFAX) 13 (step 33).

Facsimile (RFAX) 8 and facsimile (LFAX)
) 9, the control unit (P
C) A message indicating that the line is in use is returned from CPU 3 to computer (CPU) 1 (step 34).

Facsimile (RFAX) 8 and facsimile (LFAX)
) 9, switch (SWA) 16 is switched to connect signal line 22 and signal line 21.
and disconnect the switch (SWC) 18 (step 35).

Next, the loop closing part (LP) 11 operates and the exchanger (E
X) A line loop is closed between the network control unit (NCU) 7 and the network control unit (NCU) 4 (step 36).

Next, the dial pulse generator (DP) 10 sends out a dial pulse (step 37).

After sending out the dial pulse, the polarity reversal detection section (PD) 12 monitors the polarity of the signal line 21 (step 38).

If the polarity does not reverse even after a certain period of time has elapsed, a call failure message is sent from the control unit (PC) 3 to the computer (CPU).
) 1 (step 39).

Next, the switch (SWA) 16 is switched to connect the signal 823 and the signal line 22, thereby making it possible to communicate between the facsimile (RFAX) 8 and the facsimile (LFAX) 9 (step 40).

If polarity reversal is detected within a certain period of time, the switch (S
WA) 16 is switched to connect the signal line 23 and public line 22, and switch (SWB) 17 is switched to connect the signal line 25 and signal line 24 (step 41).

In this state, the control unit (PC) 3 converts the information sent from the computer (CPU) 1 into information suitable for facsimile communication, and transmits the information to the modulation/demodulation unit ( MDM) 5, switch (SWB)
17. Line usage detection unit (BD) 13. Switch (SWA)
) 16 to facsimile (RFAX) 8 (
Step 42).

After communication is completed, switch (SWB) 17 is switched to connect signal line 25 and signal line 26, and then switch (SWC)
18 to enable communication between the facsimile (RFAX) 8 and the facsimile (LFAX) 9 (step 43).

From electronic computer (CPU) 1 to facsimile (LFAX)
An example of the operation of the control device (FPC) 2 when transmitting information to the FPC 9 will be explained using FIG.

First, the electronic computer (CPU) 1 sends a facsimile (LF)
In order to transmit information to AX) 9, control unit (PC) 3 is activated (step 44).

The control unit (PC) 3 first includes a line usage detection unit (BD).
It is checked whether communication is taking place between the facsimile (RFAX) 8 and the facsimile (LFAX) 9 via the facsimile (RFAX) 13 (step 45).

Facsimile (RFAX) 8 and facsimile (LFAX)
) 9, the control unit (P
C) A message indicating that the line is in use is returned from CPU 3 to computer (CPU) 1 (step 46).

Facsimile (RFAX) 7 and Facsimile (LFAX)
) 8, switch (SWD) 19 is switched to connect signal line 28 and signal line 29.
(Step 47).

Next, the switch (SWE) 20 is switched at a constant cycle. The signal line 29 is connected to the signal line 31 for 1 second and to the signal line 30 for 2 seconds. During the one second period during which the signal line 29 is connected to the signal line 31, a calling signal is sent from the calling signal sending section (IR) 15 to the facsimile (LFAX) 9 (step 48).

During the next two seconds when the signal line 29 is connected to the signal line 30, the loop closure detection unit (LD) 14 detects the facsimile (LD)
It is monitored whether the loop is closed between the FAX) 9 and the modulation/demodulation unit (MDM) 6 (step 49).

Repeat the above action a certain number of times, during which time.

If the loop is not closed, facsimile (LF)
In this embodiment, the number of repetitions is set to 10 in order to determine that the AX) 9 cannot be connected to the control device (FPC) 2, but the number of repetitions is not limited to this. ) (step 50), send the message that cannot be connected to facsimile (LFAX) 9 to computer (C
PU)l (step 51).

If the facsimile (LFAX) 9 cannot be connected, change the switch (SWD) 19 to connect the signal line 27 and the signal line 28.
The facsimile (RFAX) 8 and the '77 facsimile (LFAX) 9 are connected to each other to enable communication between them (step 52).

When the loop closure detection unit (LD) 14 detects loop closure, it stops periodically switching the switch (SWE) 20 and fixes the signal line 30 and the signal line 29 so that they are connected (step 53).

In this state, the control unit (PC) 3 converts the information sent from the computer (CPU) 1 into information suitable for facsimile communication, and transmits the information to the modulation/demodulation unit ( MDM) 5, switch (SWB)
17. Loop closure detection unit (LD) 14, switch (SW
E) Send it to the facsimile (LFAX) 9 through the switch (SWD) 19 (step 54).

After communication is completed, switch (SWD) 19 is changed to connect signal line 27 and signal line 28, and facsimile (RFAX) is started.
) 8 and '77 Kushimiri (LFAX) 9 are enabled for communication (step 55).

This embodiment has the following effects.

■ Facsimile (RFAX) 8 and facsimile (LF)
AX) 9, normal facsimile communication can be performed. Therefore, the facsimile (LFAX) 9 is not exclusively used by the control device (FPC) 2.

■ Information from the computer (CPU) 1 can be transmitted to the facsimile (LFAX) 9 without passing through the public line 22. This eliminates the need for line usage charges.

■ Information from the computer (CPU) 1 can also be transmitted to a remote facsimile (RFAX) 9 through the public line 22.

〔Effect of the invention〕

According to the present invention, information can be transmitted by combining any two of three types: a facsimile connected to a local line, a facsimile connected to a public line, and a computer, resulting in the following effects. There is.

■ Since normal facsimile communication can also be performed, there is no need to dedicate the facsimile connected to the local line to the control device.

B) Computer information can be transmitted to a facsimile connected to a local line without using a public line, so line usage fees are not required.

■ Computer information can be transmitted to a facsimile in a remote location via a public line.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a flowchart showing an example of the operation of the control device (FPC) when transmitting information from a computer (cpU) to a facsimile (RFAX), and FIG. The figure is a flowchart showing an example of the operation of the control device (FPC) when transmitting information from a computer (CPU) to a facsimile (LFAX). DESCRIPTION OF SYMBOLS 1... Electronic computer, 2... Control device, 3... Control unit, 4... Network control unit, 5... Modulation/demodulation unit, 6... Line connection switching unit, 7... Exchange , 8...Facsimile, 9...Facsimile, 1o...Dial pulse generation section, 11...Loop closing section, 12...Polarity reversal detection section, 13...Line use detection section, 14 . . . Loop closure detection section, 15 . . . Calling signal transmission section. Akira 2nd (b) 1st Suro (Q) A〕Kuni (A) Departure 121 (C

Claims (1)

[Claims] 1. In a facsimile communication control device consisting of an operation procedure converter, a modulator/demodulator, and a network controller for mutually transmitting information between a computer and a facsimile, a connection from the network controller to a public line. a connection section that connects the network control section to a dedicated local line that connects the facsimile directly to this device without going through an exchange; and a connection section that connects the facsimile to a dedicated local line that connects the facsimile directly to the device without going through an exchange; In addition to transmitting information in accordance with the directives of A facsimile communication control device comprising a line connection switching section for switching line connections.