JPH099026A - Picture communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a picture communication equipment which can selectively restrict the communication of picture information to the terminal of a standard procedure without depending on a non-standard procedure and which can improve security protection performance in the frame of the standard procedure. SOLUTION: In a control stage before the reception of picture information, which is executed by a communication control part 8 controlling the reception of picture information by a prescribed standardized control procedure, is started, a DIS signal is transmitted to a calling terminal, the function notice of a self terminal is given and a detection part 81 detects the content of added information transmitted with a DCS signal transmitted in response to the DIS signal. A transmission control part 82 starts the reception of picture information when it is judged that the content of added information is matched with information stored in a storage part 83.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image communication apparatus for transmitting image information in accordance with a standardized prescribed control procedure, particularly a control procedure complying with CCITT recommendation.

[0002]

2. Description of the Related Art A conventional apparatus of this type, as shown in FIG. 6, has a document reading section 1, a print recording section 2, and a code / decoding section 3.
, Buffer memory 4, modem 5, NCU (network control unit) 6, operation panel 7 ', and communication control unit 8'.
And, as shown in FIG. 7 or FIG.
Image information is transmitted by the telephone line L in accordance with the standard procedure based on the recommendation (for example, Japanese Patent Laid-Open No. 63-63).
-269675).

FIG. 7 shows a control procedure when the calling side transmits image information (facsimile message).

In this case, first, the called side that has performed the incoming call processing has a D indicating that it has a CCITT standard receiving function.
The iS signal (digital identification signal) is transmitted. This DiS
Upon receiving the signal, the calling side sends out a DCS signal (digital command signal) for setting the function. The called party receiving this DCS signal selects a mode and prepares for reception.

After that, the image information (facsimile message), which is the actual information, is transmitted from the calling side to the called side through the training of the modem, the exchange of the TCF signal (training check signal) and the CFR signal (reception preparation completion signal). It will be sent.

FIG. 8 shows a control procedure when the called side transmits image information (facsimile message) by polling from the calling side.

In this case, first, the called side that has performed the incoming call process sends out a DiS signal (digital identification signal). The calling side receiving this DiS signal returns a DTC signal (digital transmission command signal) for delegating the transmission right of image information to the partner terminal. The called side receiving this DTC signal sends out a DCS signal (digital command signal). The calling side, which has received this DCS signal, selects a mode and prepares for reception.

After that, the image information (facsimile message), which is the actual information, is transferred from the called side to the calling side through the training of the modem, the exchange of the TCF signal (training check signal) and the CFR signal (reception preparation completion signal). It will be sent.

Image information has been transmitted according to the standard procedure described above. In addition, communication compatibility has been obtained by defining such a standard procedure.

[0010]

However, according to such a configuration, there is a problem that communication confidentiality is low because an image communication apparatus having a standard procedure establishes communication with any other party. there were.

The above-mentioned problem occurs for the following reasons. That is, in the conventional image communication apparatus of this type, if the procedure signals such as DiS, DTC, DCS exchanged between the calling side and the called side are in the format defined by the standard procedure, those The control signal is transferred to the control step (face C) for communicating image information regardless of the contents of the CSi, CiG, and TSi signals inserted as additional information (option information) in the signal (1). For this reason, it is not possible to selectively restrict the communication of image information to terminals having the same standard procedure, which impedes the confidentiality of communication.

As a device for restricting a communication partner to a specific terminal only, there is a device that performs image communication by a non-standardized control procedure, that is, a non-standard procedure. However, in the device that executes this non-standard procedure, the communication partner is limited to a special device that executes the same non-standard procedure, and the communication partner of the image information must be selected from the devices that execute the normal standard procedure. I couldn't. In other words, it has not been possible to selectively restrict the communication of image information with respect to the standard procedure terminal.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an image communication apparatus capable of improving confidentiality within the framework of standard procedures.

[0014]

In order to solve the above problems, the present invention provides a communication control means for controlling the reception of image information by a standardized predetermined control procedure, and an image executed by this communication control means. At the control stage before receiving information,
Means for sending a digital identification signal to the calling terminal to notify the function of the terminal itself, and judging for determining the contents of the digital command signal and the additional control information sent from the calling terminal in response to the digital identification signal. And a transmission control means for starting the reception of image information when the determination means determines that the content of the additional control information matches the previously stored information.

[0015] With this, communication of image information to the terminal of the standard procedure can be selectively restricted without relying on the non-standard procedure, so that confidentiality can be improved within the frame of the standard procedure.

[0016]

1 shows a schematic structure of an image communication apparatus according to an embodiment of the present invention, in which L is a telephone line, 1 is a document reading section, 2 is a print recording section, and 3 is a code. Decoding unit, 4 buffer memory, 5 modem, 6 NCU
(Network control unit), 7 is an operation panel, 8 is a communication control unit, 81 is an additional information detection unit, 82 is a transmission control unit, and 83 is a storage unit.

The communication control unit 8 is configured by using a general-purpose information processing device, which is a microcircuit, called a microcomputer, and has a standardized predetermined control procedure, that is, CCI.
The transmission of image information is controlled according to the standard procedure based on TT.

The additional information detecting section 81 determines whether or not the predetermined additional information is inserted in the procedure signal sent from the partner terminal according to the standard procedure at the control stage before starting the transmission of the image information. To detect.

The transmission control unit 82 controls the transmission of image information only when the insertion of the additional information is detected by the detection unit 81.

The storage unit 83 is, for example, a RAM operated as a non-volatile memory by power backup.
(Random access memory),
The detection unit 81 stores reference information (check data) for detecting the additional information and additional information to be inserted into the self-transmitting procedure signal.

The operation panel 7 incorporates an operation section for inputting reference information and additional information stored in the storage section 83 and setting whether or not the transmission control section 82 is interposed.

Although the additional information detection section 81 and the transmission control section 82 are individually configured in the figure, in an actual product, they are incorporated in the communication control section 8 by software.

The operation of the image communication apparatus configured as described above will be described below. 2 and 3 show a control procedure when the calling side transmits image information (facsimile message) in the apparatus of the present invention shown in FIG. 1, and the conventional control shown in FIG. Corresponding to the procedure.

In this case, first, the called side that has performed the incoming call processing has a D indicating that it has a CCITT standard receiving function.
The iS signal (digital identification signal) is transmitted.

The calling side receiving the DiS signal is
The contents of the CSi signal (called terminal identification signal) inserted as additional information in the FIF (facsimile information field) of the iS signal are checked. This check is performed using the reference signal stored in the storage unit 83 in advance. If it is determined that the DSi signal has a predetermined content as a result of the check, the calling side sets the DCS signal (digital command signal) for setting the function, as shown in FIG.
Is sent. At this time, the FIF of the DCS signal is
The additional information previously stored on the calling side is TS
It is inserted as an i signal (calling terminal identification signal).

The called party receiving the DCS signal receives the D
TS inserted as additional information in the FIF of the CS signal
Check the contents of the i signal. This check is performed by using the reference signal stored in advance in the storage unit 83 on the called side. If the result of the check is that the CSi signal has a predetermined content, the called side selects a mode and prepares for reception.

After that, the image information (facsimile message), which is the actual information, is transmitted from the calling side to the called side through the training of the modem, the exchange of the TCF signal (training check signal) and the CFR signal (reception preparation completion signal). It will be sent.

On the other hand, as a result of the above check, when it is determined that the content of the CSi or TSi signal is not the predetermined content, a DCN signal (line disconnection command signal) is issued as shown in FIG. The communication is forcibly terminated before the image information is transmitted.

As described above, the operation of selectively restricting the image information transmission partner is performed between the terminals having the standard procedure.

In the operation example shown in FIG. 2, both the calling side and the called side check the additional information (CSi / TSi signal), but only the calling side or the called side checks. By doing so, it is possible to cause the terminals having the standard procedure to selectively restrict the image information transmission partner. For example, if the calling party performs the above check,
The transmission destination of the image information can be limited to a specific standard terminal, which can prevent transmission to the wrong destination. Further, if the above-mentioned check is performed on the called side, the transmission source of the image information can be limited to a specific standard terminal, whereby unnecessary reception can be avoided.

FIGS. 4 and 5 show a control procedure when the called side transmits image information (facsimile message) by polling from the calling side in the apparatus of the present invention shown in FIG. 8 corresponds to the conventional control procedure shown in FIG.

In this case, first, the called party, which has performed the incoming call processing, sends out a DiS signal (digital identification signal).

The calling side receiving the DiS signal returns a DTC signal (digital transmission command signal) for delegating the transmission right of image information to the partner terminal.

The called party receiving the DTC signal receives the D
Ci inserted as additional information in the FIF of the TC signal
The content of the G signal (calling terminal identification signal) is checked. This check is performed by using the reference signal stored in advance in the storage unit 83 on the called side. As a result of the check, if it is determined that the CiG signal has a predetermined content, the called side sends out a DCS signal (digital command signal) as shown in FIG.

The calling side receiving the DCS signal selects a mode and prepares for reception. After this, modem training, TCF signal (training check signal)
Then, the image information (facsimile message) which is the actual information is transmitted from the called side to the calling side through the exchange of the CFR signal (reception ready signal).

On the other hand, as a result of the above check, when it is determined that the content of the CiG signal is not the predetermined content, a DCN signal (line disconnection command signal) is issued from the called side as shown in FIG. The communication is forcibly terminated before the image information, which is the actual information, is transmitted.

As described above, the called side transmits the image information in response only to the polling from the specific calling terminal designated in advance. As a result, the confidentiality of communication can be ensured within the standard procedure.

In this embodiment, the additional information is inserted into the FIF of the standard procedure command as the additional information, but the present invention is not limited to this, and any form can be used as long as it can be analyzed by the standard procedure. It may be.

[0039]

As is apparent from the above description, according to the present invention, the digital identification signal is sent to the calling terminal to notify the function of the own terminal at the control stage before the start of receiving the image information. To judge the contents of the digital command signal and the additional control information sent from the calling terminal as a response signal, and start the reception of the image information when the contents of the additional control information match the previously stored information. This makes it possible to selectively restrict the communication of image information to the terminal of the standard procedure without depending on the non-standard procedure, so that the confidentiality can be improved within the frame of the standard procedure.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an image communication device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a control procedure performed by the device.

FIG. 3 is a diagram showing an example of a control procedure performed by the device.

FIG. 4 is a diagram showing another example of a control procedure performed by the device.

FIG. 5 is a diagram showing another example of a control procedure performed by the device.

FIG. 6 is a schematic configuration diagram of a conventional image communication device.

FIG. 7 is a diagram showing an example of a control procedure performed by the device.

FIG. 8 is a diagram showing another example of a control procedure performed by the device.

[Explanation of symbols]

 L communication line (telephone line) 1 original reading unit 2 print recording unit 3 code / decoding unit 4 buffer memory 5 modem 6 NCU (network control unit) 7 operation panel 8 communication control unit 81 attached information detection unit 82 transmission control Department 83 Storage

Claims (1)

[Claims] 1. A communication control means for controlling reception of image information according to a standardized predetermined control procedure, and a control stage before the start of reception of image information executed by the communication control means.
Means for sending a digital identification signal to the calling terminal to notify the function of the terminal itself, and judging for determining the contents of the digital command signal and the additional control information sent from the calling terminal in response to the digital identification signal. An image communication apparatus comprising: a means and a transmission control means for starting the reception of the image information when the content of the additional control information is determined to match the previously stored information by the determination means.