JPH0576217B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data transmission device, and more particularly to a facsimile device having two different line interfaces and an interface with an external device.

[Conventional technology]

Conventionally, one facsimile device is equipped with only one line interface, so one facsimile machine cannot be connected to two different lines. In special cases, one facsimile machine may be connected to two different types of lines, but since this machine switches lines in the DC circuit, it is possible to connect a line that requires interfacing with digital signals. However, it was not possible to switch between the subscriber telephone line and the subscriber telephone line.

Furthermore, recently, a facsimile device has been proposed that can be switched and connected to both a subscriber telephone line and a dedicated line, but this device does not have an interface function with external devices such as a secret device and a protocol conversion device.

[Problem to be solved by the invention]

In this way, conventional data transmission devices, especially facsimile devices, have a connection between subscriber telephone lines and digital
Since it was not possible to connect to both dedicated lines via an interface, it was necessary to install one facsimile machine for each.

An object of the present invention is to solve such conventional problems, and to enable a single facsimile device and an external device coupled to the facsimile device to be used both on a subscriber telephone line and a leased line via a digital interface, respectively. The object of the present invention is to provide a data transmission device that can be used as an input/output terminal for a computer.

[Means to solve the problem]

In order to achieve the above object, the data transmission device of the present invention includes: (a) a first interface section (18 in FIG. 6) connected to a first line (subscription telephone line); A second interface section 19 that is connected to a dedicated line or a computer and that transmits or receives data in parallel even when the first line is communicating. The transmission device is a data processing device 22 that stores the received data when a call is received from the second line while the first line is communicating, and a data processing device 22 that accepts the incoming call and connects the incoming line to the data processing device 22. It is characterized by comprising gate circuit units 161 and 191 for inputting the received data to the data processing device 22, and a selection control unit 13 for selecting whether or not to input the received data to the data processing device 22.

(b) Furthermore, when a call is received from the second line while the first line is communicating, the first data processing device 22 stores the received data, and the first data processing device 22 which receives the received call and transfers the data to the incoming line. Gate circuit units 161 and 191 connected to the processing device 22, a second data processing device 2 that encrypts data during transmission and decrypts encrypted data during reception, and transmits received data to the first and second data processing devices. It is also characterized by comprising a selection control section 19' for selecting whether or not to input to 22, 2.

[Effect]

In the present invention, a new external device interface section is added to a conventional subscriber telephone line facsimile device, and a data storage device (SAF) and/or a secret device are connected to the interface section. The external device interface section has a transmission control function with the other party's facsimile device or computer on the dedicated line, and a gate function to switch the signal path of image information data.

Even when the subscriber telephone line is in communication, data can be sent to or received from the leased line or computer via the second interface in parallel. That is, when an incoming call is received from the leased line or computer while communicating with the subscriber telephone line, the incoming call is accepted and the incoming line is connected to the data storage device by the gate circuit. Further, when an incoming call is received from the dedicated line or the computer while communicating with the subscriber telephone line, the incoming call is accepted and the incoming line is connected to the secret device by the gate circuit section. Further, the system control unit or external device interface unit that controls the gate circuit unit selects whether or not to input the received data to the data storage device or the secret device.

This allows one facsimile device to be used for both subscriber telephone lines and leased lines, and
It can also be connected to a computer and used as an input/output terminal, and the secret device or storage device can be used on both subscriber telephone lines and leased lines.
Moreover, if a storage device is used, it is possible to simultaneously communicate on both lines in parallel.

〔Example〕

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

FIGS. 1a, 1b, and 1c are functional explanatory diagrams of the facsimile apparatus of the present invention, respectively.

In the present invention, as shown in FIG.
The facsimile device 1 has an interface (NCU: network control unit) with the subscriber telephone line 5.
Generally, it is provided with a standard interface 6 for connecting a data terminal and an external modem 3, and further provided with an interface with an external device 2, such as a secret device.

Devices connected to the standard interface 6 include an external modem 3, a computer 4, and the like.

FIG. 1a shows a case where a computer 4 connected via a standard interface 6 is connected via a dedicated line 7. In FIG. In this case, the external modem 3 is connected to both ends of the dedicated line 7, and the facsimile device 1 is used as a terminal device for the computer 4.

FIG. 1b shows a case where the external modem 3 is connected to the standard interface 6, and facsimile communication can be performed with the other party's facsimile device via the dedicated line 7 or the like.

FIG. 1c shows a case where the computer 4 is directly connected to the standard interface 6, and the facsimile device 1 can be used as an input/output device for the computer 4.

If the external device 2 connected to the facsimile device 1 is, for example, a secret device, it is possible to perform encrypted communication over different lines, such as a subscriber telephone line 5 and a dedicated line 7 via a standard interface 6. It is possible.

FIG. 2 is a block diagram of a facsimile machine showing one embodiment of the present invention.

The facsimile device 1 of this embodiment is a conventional facsimile device for subscriber telephone lines to which an external device interface section 19 is newly added. The external device interface section 19 has a transmission control function between the dedicated line 7 and the other party's facsimile device or computer output, and a gate function for switching the signal path of image information data.

In FIG. 2, 11 is a reading section, 12 is a recording section, 13 is a system control section, and 14 is a data compression/
an extension section, 15 an operation section, 16 a data line switching section,
17 is a modulation/demodulation section, 18 is a network control section, and 19 is an external device interface section.

3 and 4 are flowcharts of image information data in communication not using the external device 2 and communication using the external device 2 in FIG.

First, the case of communication without using the external device 2 will be described.

In FIG. 3, when image information data is transmitted to subscriber telephone line 5, the image information data read by document reading section 11 is compressed by data compression/expansion section 14, and then the data line switching section 16 is The signal is sent to the modulation/demodulation section 17 under control, modulated by the modulation/demodulation section 17, and sent to the subscriber telephone line 5 via the network control section 18.

On the other hand, when transmitting image information data to the dedicated line 7 or the computer 4, etc., the image information data compressed by the data compression/expansion section 14 is transferred to the external device interface section by gate control of the data line switching section 16. 19 and the external modem 3 to the dedicated line 7 or the computer 4.

In the case of reception, the image information data is sent to the recording unit 12 via a route opposite to the above-mentioned route, and is output as a hard copy.

Next, with reference to FIG. 4, the flow of image information data in communications performed using the external device 2 will be described.

When transmitting image information data to subscriber telephone line 5 using external device (for example, secret device) 2,
The image information data compressed by the data compression/expansion section 14 is sent to the external device interface section 19 under gate control of the data line switching section 16. The external device interface unit 19 sends image information data to the external device 2 under gate control. The image information data that has been processed (for example, encrypted) and output by the external device 2 is inputted again to the external device interface section 19 and sent to the data line switching section 16 under gate control. The data line switching section 16 transfers image information data to the modulation/demodulation section 1 by gate control.
After being modulated there, it is sent to the subscriber telephone line 5 via the network control section 18.

In the case of reception, the image information data is demodulated and decoded (for example, decoded) through the reverse route to the above.
After that, it is decompressed and output as a hard copy by the recording unit 12.

When transmitting image information data to the dedicated line 7 (computer 4 etc.) using the external device 2, the image information data compressed by the data compression/expansion section 14 is sent to the data line switching section 16 under gate control. According to
The data is sent to the external device interface section 19. The external device interface unit 19 sends image information data to the external device 2 under gate control. External device 2
The image information data that has been processed (for example, encrypted) is input again to the external device interface section 19, and is sent to the dedicated line 7 or the computer 4 via the standard interface via the external modem 3 under gate control. is output to.

In the case of reception, the image information data passes through the reverse path to that described above, is sent to the recording section 12, and is output as a hard copy.

FIGS. 5 and 6 are functional block diagrams of facsimile apparatuses showing other embodiments of the present invention, respectively.

Figure 5 shows the manually operated network control unit (MA type).
This figure shows the case where a standard interface is added to a facsimile device equipped with an NCU. The switching of the image information data line in FIG. 5 is done manually when transmitting, and automatically when receiving.

At the time of transmission, when the subscriber telephone line mode or leased line (computer) mode is specified by the switch 20 in the operation section 15, the specified information is sent to the system control section 13. When the system control unit 13 receives the mode information,
Confirm that there is no communication state, and then switch the data line switching unit 1.
By controlling the gate 161 of No. 6, the image information data line is switched to the mode specified by the operation section 15. That is, in the fixed telephone line mode, the gate switch 161 is switched to the modulation/demodulation unit 17 side, and in the leased line mode, the gate switch 161 is switched to the external device interface unit 19 side.

In the case of reception, the image information data line is automatically switched by detecting an incoming signal (incoming call code). That is, when a call is received from subscriber telephone line 5, network control section 18 detects a ringing signal and sends the information to system control section 13. On the other hand, upon receiving a transmission request code from the other party's facsimile device or computer 4 on the leased line, the external device interface section 19 sends the information to the system control section 13 .

When the facsimile device 1 is in a standby state, the data line switching unit 1 is switched under the control of the system control unit 13.
At step 6, the image information data line is switched to the line on which the incoming call was detected first. If a transmission request code is received from the other party's facsimile device (computer) on the leased line during communication on the subscriber telephone line 5, code information indicating that the line is busy is returned from the external device interface section 19. . Furthermore, when a call is received from the subscriber telephone line 5 while communicating on the leased line (computer), the bell of the telephone rings and, if necessary, a person answers or an answering machine or the like responds.

In Figure 6, automatic network control unit (AA type NCU)
This figure shows a case in which a standard interface is added to a facsimile device equipped with a standard interface, and a storage device (SAF) is also provided. The switching of image information data lines during transmission in FIG. 6 is automatically performed as follows.

The image information data to be transmitted is stored in the storage device 22 in advance. In addition, by specifying the destination number and line mode using the numeric keypad 21 etc. of the operation unit 15 when storing documents, the system control unit 1
3, the image information data output from the storage device 22 can be sent to a specified destination by automatically switching the image information data line at the gate 191 of the external device interface section 19. .

Next, in the case of reception, the line mode is automatically switched in the same manner as in the case of FIG. That is, when a call arrives on the subscriber telephone line 5, the incoming call information is sent from the network control section 18 to the system control section 13, and on the other hand, when a transmission request code is received from the leased line, the request information is sent from the external device interface section 19 to the system control section 13. It is sent to the control unit 13. As a result, the system control unit 13 confirms that communication is not in progress and then closes the gate 19 of the external interface unit 19.
Switch 1. Furthermore, if the storage device 22 is provided, incoming calls to both lines can be accepted in parallel. That is, even when communicating with the subscriber telephone line 5, if there is a transmission request code from the other party's facsimile device (or computer) on the leased line, it will be accepted and the system control section 13 will open the gate 191 of the external device interface section 19. It is possible to connect to the storage device 22 via the storage device 22 and store the received image information data in the storage device 22. After the communication via the subscriber telephone line 5 is completed, the accumulated image information data is sent to the recording section 12, where it can be output as a hard copy.

FIG. 7 is a data flow diagram of a facsimile machine showing still another embodiment of the present invention.

FIG. 7 shows a case where, for example, a storage device 22 is connected in addition to the secret device 2 as an external device.

This facsimile device supports () transmission and reception using a subscriber telephone line, () transmission and reception using a leased line, and () use of a leased line when performing non-encrypted communication using a subscriber telephone line. It is possible to simultaneously transmit data using a dedicated telephone line, and simultaneously receive data using a leased line while non-encrypted communication is being carried out using a subscriber telephone line.

The flow of image information data in each case will be described.

First, (a) when transmitting using subscriber telephone line 5, in the case of non-encrypted communication, lines 1, 2, and 3 from reading section 11 to data compression/expansion section 14, line 4 of data line switching section 16, 5, 6, modem section 17, lines 7, 9, line 1 of network control section 18
0, 11, and the subscriber telephone line 5 route.
In addition, during encrypted communication, lines 1, 2, and 3 from the reading section 11 to the data compression/expansion section 14, line 21 of the data line switching section 16, line 34 of the interface section 19', line 35 of the concealing device 2, and line 35 of the data line switching section 16, ,
Line 20 of interface section 19', lines 15, 5, 6 of data line switching section 16, modulation/demodulation section 1
7, lines 7, 9, line 10 of network control unit 18,
11, it is sent out via the subscriber telephone line 5 route.

Next, (b) when receiving using the subscriber telephone line 5, in the case of non-encrypted communication, the subscriber telephone line 5
line 11 from the network controller 18, line 10 from the network control unit 18,
9, line 8 of data line switching section 16, modulation/demodulation section 1
7 line 17, switching section 16 line 16,1
4. Line 13, 1 of data compression/expansion section 14
2. Received through the path of the recording unit 12.

In addition, when using encrypted communication, subscriber telephone line 5
line 11 from the network controller 18, line 10 from the network control unit 18,
9, line 8 of data line switching section 16, modulation/demodulation section 1
7 lines 17, 18, interface part 19'
lines 41, 40, concealment device 2, line 39,
Lines 38 and 19 of the interface section 19', lines 16 and 14 of the data line switching section 16, lines 13 and 12 of the data compression/expansion section 14, and recording section 12
is received via the route.

Next, (c) when transmitting using a leased line, in the case of non-encrypted communication, from the reading unit 11 to the line 1
Lines 2 and 3 of the data compression/expansion section 14, line 21 of the data line switching section 16, and interface section 1
9' lines 22, 24, and 25, which are dedicated lines.

In addition, during encrypted communication, line 1 from the reading section 11, line 2 from the data compression/expansion section 14,
3. It is sent out through the lines 21 and 34 of the data line switching section 16, the secret device 2, the lines 35, 23, 24, and 25, and the dedicated line.

Next, (d) when receiving using a dedicated line, when the communication is non-encrypted, the line 44 from the dedicated line,
Lines 43, 42, 1 of interface section 19'
9, lines 16 and 14 of the data line switching section 16, lines 13 and 12 of the data compression/expansion section 14, and the recording section 12.

In addition, during encrypted communication, line 44 from the dedicated line, line 43 of the interface section 19',
41, 40, secret device 2, line 39, lines 38, 19 of interface section 19', lines 16, 14 of data line switching section 16, lines 13, 12 of data compression/expansion section 14, path of recording section 12 received at

Next, (e) When transmitting using a leased line while transmitting and receiving non-encrypted communication using the subscriber telephone line 5, the subscriber telephone line 5 performs the above-mentioned (a),
The route is the same as the route for non-encrypted communication in (b).

On the other hand, in a dedicated line, the reader 1
1, line 1, line 27 of the compression/expansion section 14, lines 29, 30, 31 of the interface section 19';
Document reading data is stored through the storage device 22. At the time of transmission, the line 32 from the storage device 22 and the line 3 from the interface section 19'
3, 37, 24, 25, are sent out via dedicated line routes.

Next, (f) when receiving image information data using a leased line while transmitting and receiving non-encrypted communication using the subscriber telephone line 5, the subscriber telephone line 5 performs the above-mentioned (a). The route is the same as the route for non-encrypted communication in (b).

On the other hand, in a leased line, from the leased line to line 4
4. Lines 43, 42 of interface section 19',
36, 30, 31, and the storage device 22. Thereafter, from storage device 22, line 32,
Lines 33, 28, 2 of interface section 19'
6. Image information data is read out through the line 12 of the data compression/expansion section 14 and the recording section 12, and is output as a hard copy.

〔Effect of the invention〕

As explained above, according to the present invention, one facsimile device can be used alternately for both the subscriber telephone line and the leased line, as well as for digital communication.
Connects to a computer via an interface,
It can also be used as an input/output terminal for a computer, and external devices such as a secret device can be used on both the subscriber telephone line and the dedicated line, and the storage device allows simultaneous communication using both lines.

[Brief explanation of the drawing]

FIG. 1 is a functional explanatory diagram of a facsimile device of the present invention, FIG. 2 is a block diagram of a facsimile device showing an embodiment of the present invention, and FIGS. 3 and 4 are flow charts of image information data in FIG. 5 and 6 are functional block diagrams of a facsimile device showing other embodiments of the present invention, and FIG. 7 is a data flow diagram of a facsimile device showing another embodiment of the present invention. 1... Facsimile device, 2... External device, 3
...External modem, 4...Computer, 11...
Reading unit, 12...Recording unit, 13...System control unit, 14...Data compression/expansion unit, 15...Operation unit, 16...Data line switching unit, 17...Modulation/demodulation unit, 18...Network control section, 19, 19'...external device interface section, 22...storage device (SAF).

Claims (1)

[Scope of Claims] 1. A first interface section connected to a first line and a second line connected to each other, and even when the first line is in communication, transmitting or A data transmission device that is equipped with a second interface unit for receiving data in one device, and when a call is received from the second line while the first line is communicating, the incoming call is received. A data processing device that accumulates data, a gate circuit unit that accepts the incoming call and connects the incoming line to the data processing device, and a selection control unit that selects whether or not to input the incoming data to the data processing device. A data transmission device comprising: 2 A first interface unit connected to a first line, and a second interface unit connected to a second line, which performs transmission or reception in parallel even when the first line is in communication. and an interface unit in one device, the first line storing the received data when a call is received from the second line while the first line is communicating. a data processing device, a gate circuit unit that accepts the incoming call and connects the incoming line to the data processing device, a second data processing device that encrypts the data at the time of transmission and decodes the encrypted data at the time of reception; A data transmission device comprising: a selection control section for selecting whether or not to input data to the first and second data processing devices.