JPH08340452A - Facsimile equipment - Google Patents

Abstract

PURPOSE: To realize facsimile communication with high secrecy while maintaining compatibility with machines of other companies by reading stored image data out corresponding to an input confidential code, and printing or transferring and outputting the data. CONSTITUTION: When a DTC signal is received from calling-side facsimile equipment within a specific time after a digital discrimination signal (DIS) signal is transmitted and then a SEP signal is received successively, that means the specification of a request for polling in confidential communication mode, so facsimile information field(FIF) information added to this SEP signal is inputted and used as a retrieval key for retrieval from a confidential file 30. Once a confidential code matching the retrieval key is detected, the image data corresponding to the confidential code are read out of the confidential file 30 and transmitted to the calling-side facsimile equipment through a facsimile modem 5. Then when the confidential code is inputted, the stored image data are read out corresponding to the input confidential code.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus having enhanced confidentiality of communication contents.

[0002]

2. Description of the Related Art Conventionally, as a facsimile apparatus having enhanced confidentiality of communication contents, there has been known a facsimile apparatus adopting a confidential communication facsimile communication. As a facsimile device adopting the facsimile communication by the confidential communication method, the transmitting side facsimile device stores the first confidential code (personal identification code) input from the input unit, and the second confidential code received from the receiving side facsimile device. In some cases, the image data of the transmission original is transmitted to the facsimile apparatus on the receiving side when there is a match (see, for example, Japanese Patent Publication No. 6-66891). Further, the transmitting side facsimile device adds the first confidential code input from the input section and transmits the image data of the transmission original, and the receiving side facsimile device stores the received image data in the memory together with the first confidential code. In some cases, when the second confidential code is input from the input unit, the image data to which the first confidential code that matches the second confidential code is added is taken out from the memory and printed out.

[0003]

However, in the conventional facsimile machine which adopts the facsimile communication according to the confidential communication system, the manufacturer of the facsimile machine controls the transmission and reception of the confidential code by a method independently determined by the manufacturer. It was For this reason, it is not compatible with the facsimile machines manufactured by other companies, and there are cases where confidential communication cannot be realized when the transmitting side facsimile apparatus and the receiving side facsimile apparatus have different models.

The present invention has been made under such circumstances, and an object thereof is to enable facsimile communication by a confidential communication system in accordance with a transmission control procedure standardized by ITU-T. An object of the present invention is to provide a facsimile device that can realize highly confidential facsimile communication while maintaining compatibility with the model.

[0005]

A facsimile apparatus of the present invention detects a confidential code added to a predetermined signal among signals received in a data link establishing procedure of facsimile communication standardized by ITU-T. Confidential code detection means, storage means for storing image data received following the signal to which the confidential code is added when the confidential code is detected, corresponding to the confidential code, input means for the confidential code, and this input means When the confidential code is input by, the storage means is provided with image data output means for reading and outputting the image data stored corresponding to the input confidential code.

[0006]

According to the present invention having such a structure, the ITU-T
When a confidential code added to a predetermined signal among the signals received in the data link establishment procedure of the facsimile communication standardized in 1. is detected, the image data received following this signal is stored in association with this confidential code. To do. When the confidential code is input by the input means, the image data stored corresponding to the input confidential code is read and output. Therefore, only the person who knows the confidential code can output the image data. In this case, since the signal to which the confidential code is added is a signal standardized by ITU-T, it is compatible even if the sending side facsimile device is a facsimile device of another company, and the facsimile communication can be performed with confidentiality. It can be carried out.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a transmission control procedure of facsimile communication standardized by ITU-T (formerly CCITT recommendation) will be described with reference to a signal sequence of main parts shown in FIG. That is,
The calling side facsimile device calls the called side facsimile device, and when the line is connected, waits for a digital identification signal (hereinafter referred to as a DIS signal) from the called side. When the line is connected, the called facsimile device sends a DIS signal to notify its standard function.
When the facsimile machine on the calling side receives the DIS signal, it receives a digital command signal (hereinafter referred to as a DCS signal).
To establish a data link in response to the standard function identified by the DIS signal. Thereafter, communication training is performed between the facsimile machines, and when a message transmission enable response signal (hereinafter referred to as a CFR signal) is received from the called side, the calling side facsimile machine transmits the image data of the transmission original. When the transmission is completed, a page end signal (hereinafter referred to as an EOP signal) is transmitted, and when a message normal reception response signal (hereinafter referred to as an MCF signal) is received from the called side, a line disconnection command signal (hereinafter referred to as DCN) is received.
(Referred to as a signal) to disconnect the line. Upon receiving the DCN signal from the transmitting side, the called side facsimile machine disconnects the line.

The above is the transmission control procedure of the facsimile communication in the normal mode. In the present invention, when the confidential communication mode is designated, the facsimile machine on the calling side is DC.
After transmitting the S signal, a subaddress signal (hereinafter referred to as a SUB signal) standardized as a signal for the data link establishment procedure by the ITU-T is transmitted to notify the receiving side of the confidential code. The SUB signal is ITU-T
According to the standard, as shown in FIG. 2A, a facsimile information field (FIF) of numerical data N ... N following this signal is used.
Information) is an optional signal indicating that it is a subaddress within the domain of the called side.

Therefore, the facsimile machine on the calling side uses the confidential code input from the input unit as the SUB information.
The facsimile machine on the called side transmits a signal and the SU
When the B signal is received, it is recognized that the confidential communication mode is set, the subsequent image data is stored in the memory, and when the confidential code is input from the input unit, the image data corresponding to the input confidential code is read from the memory and printed. , Output by output means such as transmission. By doing so, it is possible to perform the facsimile communication by the confidential communication method according to the transmission control procedure of the facsimile communication standardized by ITU-T.

As an option signal similar to the SUB signal, for example, a password signal (hereinafter referred to as PWD signal) shown in FIG. 2B is standardized by ITU-T. This PWD signal is the numerical data N that follows this signal.
.. N is a signal indicating that the FIF information is a password for transmission, and a PWD signal may be transmitted instead of the SUB signal to notify the confidential code.
In addition, the selective polling signal (hereinafter, S
Also referred to as an EP signal), numerical data N ...
The FIF information of N is standardized by ITU-T as a signal indicating that it is a sub address for the polling mode. In the polling mode, the confidential code can be notified by using this SEP signal. In addition, the above PWD
In the polling mode, the FIF information following this signal is a bus word for the polling mode. Therefore, in the polling mode, the PWD signal is transmitted instead of the SEP signal to notify the confidential code. Good.

An embodiment of the present invention will be described below with reference to FIGS.
Will be explained. FIG. 3 is a block diagram showing the arrangement of the essential parts of the facsimile apparatus according to this embodiment. That is,
This facsimile machine is equipped with a CPU (Central Processing Unit) 1 as a control unit main body. Further, a ROM (read only memory) 2 in which fixed data such as a program for controlling the CPU 1 is stored in advance, and a RAM (random access memory) operating as a temporary storage device.
3 is mounted, and the CPU 1, ROM 2 and RA
The main memory unit of M3 is connected by a bus line 4 such as an address bus and a data bus.

Further, the facsimile machine is equipped with a facsimile modem 5, and a public line 6 is connected to the facsimile modem 5. Further, this facsimile apparatus controls driving of a clock unit 7 for timing the date and time and a document reading unit 8 for optically reading the transmission document, and takes in image data of the transmission document read by the document reading unit 8. The reading control unit 9, the image compression unit 10 that compresses image data to be transmitted by facsimile, the image restoration unit 11 that restores the compressed image data, and the printing unit 12 that prints on recording paper are controlled to drive the printing unit. A print control unit 13 for outputting image data of an output document to 12, a keyboard input circuit 15 for fetching a key signal from a keyboard 14, and a display 16 such as a liquid crystal display are controlled to drive the display 16 to display a clock. A display control unit 17 that outputs display data such as date and time data and various message data that are timed by the unit 7 is mounted. The facsimile modem 5, the clock unit 7, the reading control unit 9, the image compression unit 10, the image decompression unit 11,
The print controller 13, the keyboard input circuit 15, and the display controller 17 are connected to the CPU via the bus line 4.
Connected to 1.

As shown in FIG. 4, the keyboard 14 includes a plurality of one-touch dial keys 21 as well as "0".
Various keys such as a numeric keypad "9" 22, a * key 23, a # key 24, a start key 25, and a function (FUNC) key 26 are provided. FIG.
As shown in, a confidential file 30 is formed as a storage means for storing the image data received by facsimile in the confidential communication mode together with the corresponding confidential code (indicated by a 6-digit numerical value in the figure).

Therefore, the CPU 1 is programmed to execute the processing shown in the flowchart of FIG. 6 when the power is turned on. That is, as ST (step) 1, RA
If initialization processing such as M3 abnormality check is performed, S
As T2, the date / time data measured by the clock unit 7 is read out and displayed on the display unit 16. In this state, in ST3, it is determined whether or not there is an incoming call from another facsimile apparatus. When there is no incoming call, in ST4, it is determined whether or not there is a key input from the keyboard 14. And if there is no key input,
Returning to ST2, the display processing of the current date and time is continued.

In ST3, when an incoming call is received from another facsimile machine via the facsimile modem 5, an automatic response is made and it is detected that the line is connected, the CPU 1
Starts the automatic reception process specifically shown in FIGS. 7 and 8. That is, the CPU 1 complies with the ITU-T standard,
First, as ST11, the CED signal, the NSF signal, the CSI signal, and the DIS signal are sequentially transmitted to the calling side facsimile device via the facsimile modem 5. At this time, DI
The 49th bit of the S signal is set to notify the calling side that the SUB signal can be received.

Next, at ST12, a DCS signal is received from the calling facsimile machine within a predetermined time, and then ST12.
When the SUB signal is received as 13, the confidential communication mode is designated. Therefore, as ST14, the FIF information added to this SUB signal is fetched as a confidential code, and the RAM 3
Temporarily store in (confidential code detection means).

Thereafter, at ST15, communication training is performed with the calling side facsimile machine, and after the training is completed, when image data from the calling side facsimile machine is received via the facsimile modem 5 at ST16, ST17 is executed. RAM for this received image data
It is stored in the confidential file 30 together with the confidential code temporarily stored in 3. After that, when the DCN signal is received from the calling side facsimile machine at ST18, the line is disconnected at ST19, the automatic reception process is terminated, and the ST
Return to the current date and time display in 2.

On the other hand, when the DCS signal is received in ST12 but the SUB signal is not received in ST13, the normal facsimile reception mode is designated.
As ST20, communication training is performed with the calling facsimile. After completing the training, ST
When the image data from the calling side facsimile device is received via the facsimile modem 5 as ST21, ST22
The image restoration unit 11 and the print control unit 13 as
The printing unit 12 prints out the received image data on recording paper. After that, when the DCN signal is received from the calling facsimile in ST23, the line is disconnected in ST24, the automatic reception process is terminated, and the current date and time display in ST2 is resumed.

After transmitting the DIS signal in ST11,
When the DTC signal is received from the calling side facsimile device within a predetermined time as ST25 and the SEP signal is subsequently received as ST26, the polling request in the confidential communication mode is designated. Therefore, the FIF added to this SEP signal is specified as ST27. Information is taken in as a confidential code (confidential code input means), and the confidential file 30 is searched using this confidential code as a search key. If a confidential code matching the search key is detected in ST28, ST29
Then, the image data corresponding to this confidential code is read from the confidential file 30 and transmitted to the calling side facsimile device via the facsimile modem 5 (image data output means).

After that, when the transmission of the image data is completed,
If the DCN signal is transmitted in ST30 and the line is disconnected in ST31, the automatic reception process is terminated and S
Return to the current date and time display of T2. As a result of searching the confidential file 30 in ST28, if the confidential code that matches the search key is not detected, there is no image data to be polled in the confidential communication mode, so the DCN signal is immediately sent. If the line is disconnected, the automatic reception process is terminated, and the current date and time display in ST2 is resumed.

On the other hand, when the DTC signal is received in ST25, but the SEP signal is not received in ST26, it is a normal polling request from the calling side facsimile apparatus, so in ST32 the document reading section 8 polls. It is determined whether the image data of the transmission document is read.
If the image data is being read, in ST33, the image data is read from the RAM 3 and transmitted to the calling side facsimile device, and after the transmission, a DCN signal is sent out, and if the line is disconnected, this automatic reception process ends. Then, the display returns to the current date and time display in ST2. If the corresponding image data is not stored in the RAM 3 in ST32, there is no image data to be polled and transmitted, so immediately if a DCN signal is sent to the calling facsimile and the line is disconnected. The automatic reception process is terminated, and the current date and time display in ST2 is resumed.

Further, in ST12 or ST25, the DCS signal or the DTC signal cannot be received within the predetermined time, and the ST
If a time-out is detected as 34, a communication error has occurred and the calling facsimile machine immediately receives a DC signal.
When the N signal is transmitted and the line is disconnected, the automatic reception process is terminated and the display returns to the current date and time in ST2.

If there is a key input from the keyboard 14 in ST4 of FIG. 6 and it is detected in ST5 that the key input is a dial input using the one-touch dial key 21 or the numeric keypad 22, the normal facsimile transmission mode is set. Since the designation has been made, the CPU 1 calls the destination facsimile machine to which the dial input was made, and when the line is connected, the image data of the original read by the original reading section 8 by the transmission control procedure based on the ITU-T standard. Send by fax.

Further, if there is a key input from the keyboard 14 in ST4 and it is detected in ST6 that the key input is the key input of the function key 26, CP
U1 is the numeric keypad 2 just before the function key 26
Depending on 2, it is determined whether any of "1", "2", "3", and "4" has been entered. Then, in ST7, "1" is entered, and then the function key 26
9 and 10 is detected when it is detected that
The confidential document transmission process concretely shown in FIG.

That is, the CPU 1 first accepts the input of the confidential code in ST41. And the numeric keypad 22
The confidential code is entered by, and then the start key 2
When 5 is entered, the entered confidential code is stored in RAM
Temporarily store in 3. Next, in ST42, the document reading section 8
It is determined whether or not the transmission original is set in. Then, if it is confirmed that the transmission original is set, in ST43, the input of the dial number of the facsimile apparatus of the original transmission destination is accepted. When a dial number is entered using the one-touch dial key 21 or the ten-key pad 22 or the like, a ring signal for calling the destination facsimile machine is transmitted via the facsimile modem 5 in ST44. In response to this, when there is a response from the destination facsimile machine and the line is connected, the reading of the transmission original set in the original reading unit 8 is controlled in ST45, and the image data of the read original is temporarily stored in the RAM 3. To do.

Thereafter, in ST46, the DIS signal from the destination facsimile machine is waited. When the DIS signal is received within a predetermined time, the DCS signal is transmitted to the destination facsimile machine as ST47, and then ST48.
The input confidential code temporarily stored in RAM3 as the FIF
The SUB signal added as information is transmitted. After a while
At ST49, when communication training is performed with the destination facsimile machine and a CFR signal is received, ST50
The image data of the transmission original temporarily stored in the RAM 3 is compressed by the image compression unit 10 and transmitted to the destination facsimile machine. When the MCF signal is received after the document is transmitted, the DCN signal is transmitted to disconnect the line. After a while
This confidential document transmission processing is terminated, and the current date and time display in ST2 is resumed.

After the line is connected to the destination facsimile machine, if the DIS signal cannot be received within a predetermined time and a time-out is detected, a communication error occurs, so a DCN signal is immediately transmitted to disconnect the line. Then, the confidential document transmission process is ended, and the process returns to the current date and time display in ST2. Also, S
If the original document to be transmitted is not set in the original document reading portion 8 at T42, the display device 16 displays a message indicating no original document error. Then, for example, if 1 second has passed, ST
Return to the current date and time display in 2. When a ring signal for calling the destination facsimile machine is transmitted in ST44 but there is no response, redialing is repeated a preset number of times. Then, if no response is obtained even with this redial, the display device 16 displays a message indicating an untransmittable error. Then, for example, if 1 second has passed, S
Return to the current date and time display of T2.

On the other hand, in ST8 of FIG. 6, when it is detected that the function key 26 is input after "2" has been entered, the CPU 1 prints the confidential document specifically shown in FIG. Start processing. That is, CPU
First, in step ST51, the 1 receives an input of a confidential code. When the confidential code is input by the ten keys 22 and then the start key 25 is input (confidential code input means), the confidential file 30 is searched by using the input confidential code as a search key in ST52. If a confidential code matching the search key is detected, ST5
As 3, the image data corresponding to this confidential code is read from the confidential file 30, the print control unit 13 is controlled, and the read image data is printed out on the recording paper by the printing unit 12 (image data output means). Thereafter, the confidential document printing process is terminated, and the current date and time display of ST2 is resumed.

As a result of searching the confidential file 30 using the input confidential code as a search key, if a confidential code matching the search key cannot be detected, a message with no data is displayed on the display 16 in ST54. After that, for example, when 1 second has passed, this message display is cleared, the confidential document print processing is terminated, and the display returns to the current date and time display in ST2.

On the other hand, in ST9 of FIG. 6, when it is detected that the function key 26 is input after "3" is entered, the CPU 1 transfers the confidential document specifically shown in FIG. Start processing. That is, CPU
First, in step ST61, the 1 receives an input of a confidential code. Then, when a confidential code is input by the ten keys 22 and then the start key 25 is input (confidential code input means), the input confidential code is temporarily stored in the RAM 3. Next, in ST62, the confidential file 30 is searched using the input confidential code as a search key. If a confidential code matching the search key is detected, ST6
As 3, the image data corresponding to this confidential code is read from the confidential file 30 and the display 16 displays a message with data.

Next, at ST64, the input of the dial number of the facsimile apparatus to which the document is transferred is accepted. Then, when the dial number is input using the one-touch dial key 21 or the numeric keypad 22 or the like, the transfer destination facsimile machine which has been dialed is called in ST65, and when the line is connected, transmission conforming to the ITU-T standard is performed. The image data read from the confidential file 30 is facsimile-transmitted by the control procedure (image data output means). Thereafter, the confidential document transfer process is terminated, and the display returns to the current date and time display in ST2.

As a result of searching the confidential file 30 using the input confidential code as a search key, if a confidential code matching the search key cannot be detected, a message of no data is displayed on the display 16 in ST66. Thereafter, for example, when 1 second has passed, this message display is cleared, the confidential document transfer process is terminated, and the display returns to the current date and time display in ST2.

On the other hand, in ST10 of FIG. 6, when it is detected that the function key 26 is input after "4" is entered, the CPU 1 requests the confidential document specifically shown in FIG. Start processing. That is, CP
The U1 first receives an input of a confidential code in ST71. Then, when the confidential code is input by the ten keys 22 and then the start key 25 is input, the input confidential code is temporarily stored in the RAM 3. Then S
As T72, the input of the dial number of the facsimile apparatus to which the original document is requested is accepted. When the dial number is input using the one-touch dial key 21 or the numeric keypad 22 or the like, a ring signal for calling the requested facsimile machine is transmitted via the facsimile modem 5 in ST73. In response to this, when there is a response from the requested facsimile machine and the line is connected, in ST74 the DIS signal from the requested facsimile machine is awaited. When the DIS signal is received within a predetermined time, the DTS signal is transmitted to the request destination facsimile apparatus in ST75, and then the SEP signal to which the input confidential code temporarily stored in the RAM 3 is added as FIF information is transmitted in ST76. Then, when the image data is received from the requested facsimile machine in ST77, the image restoration unit 11 and the print control unit 13 are controlled so that the printing unit 12 prints out the received image data on the recording paper. After that, when the DCN signal is received from the requesting facsimile apparatus in ST78, the line is disconnected, the confidential document request process is terminated, and ST2 is entered.
Return to the current date and time display.

If the image data cannot be received in ST77 and the DCN signal is received in ST78, the line is immediately disconnected, the confidential document request process is terminated, and S
Return to the current date and time display of T2. If the DIS signal cannot be received within the predetermined time after the line connection with the requested facsimile machine, a communication error has occurred and the DC signal is immediately sent.
The N signal is transmitted to disconnect the line, the confidential document request process is terminated, and the process returns to ST2 for displaying the current date and time. When a ring signal for calling the requested facsimile machine is transmitted but there is no response, redialing is repeated a preset number of times. Then, if no response is obtained even with this redial, the display device 16 displays a message indicating an untransmittable error. After that, for example, when 1 second has passed, the display returns to the current date and time display in ST2.

When both sides of the facsimile apparatus of the present embodiment configured as described above are used to transmit an original by facsimile in the confidential communication mode, the original sender is the original of the first facsimile apparatus which is the calling side. After the transmission original is set in the reading unit 8, first, the numeric keypad 22 of the first facsimile apparatus is used to input "1" and then the function key 26 is input to select the confidential document transmission process. Next, the numeric keypad 22 is used to enter an arbitrary confidential code predetermined with the document receiver, and then the start key 25 is input. Further, the dial number of the called second facsimile machine owned by the original document recipient is input. Then, the first facsimile machine calls the second facsimile machine. Then, when the line is connected and the CED signal, the NSF signal, the CSI signal, and the DIS signal are sequentially responded from the second facsimile device, the DCS signal is transmitted, and subsequently, the confidential code entered by the key is transmitted to the FIF information. SUB signal is transmitted. Thereafter, communication training is performed, and when the CFR signal is responded, the document reading unit 8
The image data of the transmission original set at is read and transmitted by facsimile. After transmitting the image data, MCF
When the signal is answered, a DCN signal is sent to disconnect the line.

On the other hand, when the second facsimile machine is connected to the first facsimile machine, the CED signal,
The NSF signal, CSI signal and DIS signal are transmitted. In response to this, when the DCS signal is received and then the SUB signal is received, it is recognized that the facsimile communication is in the confidential communication mode, and the confidential code added to the SUB signal is temporarily stored in the RAM 3. After that, communication training is performed, and when the training is completed, a CFR signal is transmitted. When the image data is received in response to this, the image data is sent to the confidential file 3 together with the confidential code.
Store in 0. After that, the MCF signal is transmitted and DCN is sent.
The line is disconnected when a signal is received.

As described above, in this embodiment, the image data of the transmission document which is facsimile-transmitted in the confidential communication mode from the first facsimile apparatus on the calling side is input from the keyboard 14 of the first facsimile apparatus. The confidential code is stored and held in the confidential file 30 formed in the RAM 3 of the second facsimile machine on the called side.

In this state, the document receiver can print out the image data of the transmission document stored in the confidential file 30 of the second facsimile apparatus on the recording paper by the printing unit 12. That is, the document receiver first inputs "2" by the numeric keypad 22 of the second facsimile machine and then inputs the function key 26 to select the confidential document printing process. Next, an arbitrary confidential code determined in advance with the manuscript sender is entered using the ten keys 22 and then the start key 25 is input. Then, the confidential file 30 is searched by using the input confidential code as a search key. When a confidential code matching the input confidential code is detected, the image data corresponding to the confidential code is read out and the printing unit 12 Is printed out on the recording paper.

Therefore, only the person who knows the confidential code corresponding to the image data of the transmission original can print out the image data of the transmission original on the recording paper.
Facsimile communication can be performed by the confidential communication method with high confidentiality. In this case, the SUB signal used for transmitting the confidential code is a signal standardized by the ITU-T as a signal for the data link establishment procedure, and therefore, in the confidential communication mode according to the transmission control procedure of the ITU-T standard. Since the facsimile communication is performed, the compatibility can be maintained even if the manufacturers of the first facsimile device and the second facsimile device are different.

The document receiver can also transfer the image data of the transmission document stored in the confidential file 30 of the second facsimile device to the third facsimile device.
That is, the original document recipient first selects "3" by inputting the function key 26 after entering "3" with the ten key 22 of the second facsimile apparatus.
Next, the numeric keypad 22 is used to enter an arbitrary confidential code that has been determined in advance with the original sender, and then the start key 25
Enter Further, the dial number of the third facsimile machine which is the original transfer destination is input. Then, the confidential file 3 is entered using the entered confidential code as a search key.
When 0 is searched and a confidential code matching this input confidential code is detected, image data corresponding to this confidential code is read. When the line is connected to the third facsimile device, the image data read from the confidential file 30 is transferred to the third facsimile device and recorded by the printing section of the third facsimile device. It is printed out on paper.

Therefore, only those who know the confidential code corresponding to the image data of the transmission original can transfer the image data of the transmission original to the third facsimile apparatus. In this case, since the second facsimile device, which is the transfer source, can transfer the image data of the transmission document to the third facsimile device without printing out the image data of the transmission document, the transmission document is transferred to the third facsimile device while ensuring the confidentiality of the transmission document. can do.

Further, in the facsimile apparatus of this embodiment, the image data of the transmission document stored in the confidential file 30 of the second facsimile apparatus can be taken out by the polling request from the third facsimile apparatus. That is, the manuscript receiver enters "4" with the numeric keypad 22 of the third facsimile machine and then the function key 2
Enter 6 to select confidential document request processing. Then the first
After transmitting the image data of the original document to the second facsimile device by using the facsimile device of No. 2, the numeric keypad 22 is used to enter an arbitrary confidential code predetermined with the original document sender who facsimile-transmits the image data of the original document. Input the start key 25. Further, the dial number of the second facsimile device is input. Then, the third facsimile machine calls the second facsimile machine. And
The line is connected and the second facsimile machine sends CED
When the signal, the NSF signal, the CSI signal, and the DIS signal are sequentially responded, the DTC signal is transmitted, and subsequently, the SEP signal having the confidential code keyed in as the FIF information is transmitted. When the image data is received in response to this, the image data is printed out on the recording paper by the printing unit. After a while
When receiving the DCN signal, the line is disconnected.

On the other hand, when the line of the second facsimile machine is connected to the third facsimile machine, the CED signal,
The NSF signal, CSI signal and DIS signal are transmitted. In response to this, when the DTS signal is received and then the SEP signal is received, it is recognized that the polling request is in the confidential communication mode, and the confidential file 30 is searched by the confidential code added to the SEP signal. Then, the image data corresponding to this confidential code is read from the confidential file 30 and transmitted to the third facsimile device. After a while
The DCN signal is transmitted to disconnect the line.

In this case, the SEP signal used for transmitting the confidential code is also a signal standardized by the ITU-T as a signal for the data link establishment procedure, and therefore, it is confidential according to the transmission control procedure of the ITU-T standard. Since polling communication is performed in the communication mode,
Even if the second facsimile device and the third facsimile device are products of other companies, compatibility can be maintained.

As a method of utilizing the facsimile system,
For example, a first facsimile machine installed at a plurality of sites transmits a manuscript by confidential communication to a second facsimile machine installed at a specific site such as a headquarters, and temporarily collects the originals.
It may be possible to transfer the data to a third facsimile apparatus installed at another site as needed, but in this case, according to the present embodiment, it is possible to realize highly confidential facsimile communication while maintaining compatibility. Play.

[0046]

As described above in detail, according to the present invention, I
When the confidential code added to a predetermined signal among the signals received in the data link establishment procedure of the facsimile communication standardized by TU-T is detected, the image data received subsequently to the signal added with this confidential code Is stored in correspondence with this confidential code, and when the confidential code is input by the input means, the image data stored corresponding to this input confidential code is read out and printed or transferred and output. It is possible to provide a facsimile device capable of performing facsimile communication by a confidential communication method in accordance with a simplified transmission control procedure and realizing highly confidential facsimile communication while maintaining compatibility with other companies' models.

[Brief description of drawings]

FIG. 1 is a diagram showing a main part signal sequence of facsimile communication standardized by ITU-T.

FIG. 2 is a diagram showing a format of a signal according to the present invention used in facsimile communication standardized by ITU-T.

FIG. 3 is a block diagram showing a main configuration of a facsimile apparatus according to an embodiment of the present invention.

FIG. 4 is a diagram showing a keyboard of the facsimile apparatus.

FIG. 5 is a diagram showing a confidential file formed in a RAM of the facsimile apparatus.

FIG. 6 is a flowchart showing main processing executed by a CPU of the facsimile apparatus.

7 is a flowchart specifically showing the automatic reception process of FIG.

FIG. 8 is a flowchart specifically showing the automatic reception process of FIG.

9 is a flowchart specifically showing the confidential document transmission process of FIG.

10 is a flowchart specifically showing the confidential document transmission process of FIG.

11 is a flowchart specifically showing the confidential document printing process of FIG.

12 is a flowchart specifically showing the confidential document transfer process of FIG.

FIG. 13 is a flowchart specifically showing the confidential document request process of FIG.

[Explanation of symbols]

 1 ... CPU 5 ... Facsimile modem 8 ... Original reading unit 12 ... Printing unit 14 ... Keyboard 22 ... Numeric keypad 25 ... Start key 26 ... Function key 30 ... Confidential file

Claims (1)

[Claims] 1. A confidential code detecting means for detecting a confidential code added to a predetermined signal among signals received in a data link establishing procedure of facsimile communication standardized by ITU-T (formerly CCITT recommendation), When the confidential code is detected, storage means for storing the image data received subsequently to the signal to which the confidential code is added in association with the confidential code, a confidential code inputting means, and a confidential code input by the inputting means. Then, an image data output means for reading out and outputting the image data stored corresponding to the input confidential code by the storage means.