JPH0586695B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a facsimile device that transmits a facsimile image signal (hereinafter simply referred to as a transmitting facsimile device) and a facsimile device that receives a facsimile image signal. (hereinafter simply referred to as the receiving side facsimile device) The required pages of the book relate to improvements in the transmission control method for facsimile devices that perform transmission control by exchanging control signals with each other, especially those called book faxes. The present invention relates to a transmission control method for a facsimile device which is suitable for application to a facsimile device capable of transmitting documents as documents.

[Technical Background of the Invention] Conventionally, when transmitting multiple pages of a book as a manuscript using the above-mentioned book fax,
After the transmission of a certain page is completed, it takes time to open the next page to be transmitted and set it to the bookfax, so in order to maintain the line during this time (maintain the connection state of the line), non-standard transmission control is used. A procedural control signal was used.

[Problems in the background art] However, when a control signal based on a non-standard transmission control procedure is used, this control signal is treated as a control signal for line maintenance for a specific facsimile device, but the above-mentioned specific For facsimile devices other than facsimile devices, it was treated as a meaningless control signal, or it was treated as a control signal with a meaning completely different from line maintenance. Therefore, the transmission of multiple pages of a book from a book fax could only be done to a specific fax machine such as those mentioned above.

[Object of the Invention] The present invention has been made in view of the above-mentioned drawbacks, and its purpose is to provide a transmission control method for facsimile equipment that can maintain line maintenance without using non-standard transmission control procedures. It is to provide.

[Summary of the Invention] Accordingly, in the present invention, when a line holding request is made, the line is held by continuously transmitting flag fields at required times during the transmission control procedure, and after that, the line is held by continuously sending flag fields at required times during the transmission control procedure. The above object is achieved by sending out control signals.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of the main parts of a transmitting side facsimile apparatus which employs the method of the present invention. In the figure, 1 indicates the CPU. A main memory 3 is connected to the CPU 1 via a memory bus 2.
The main memory 3 stores data and programs used by the CPU 1. Further, a buffer memory 5, a procedure control section 6, a facsimile image signal transmission/reception section 7, and an operation panel 11 are connected to the CPU 1 via an I/O bus 4. The buffer memory 5 stores a facsimile image signal to be transmitted or a received facsimile image signal. The procedure control unit 6, under the control of the CPU 1, complies with the CCITT recommendations.
It transmits and receives control signals for transmission control procedures based on T.30. The facsimile image signal transmitting/receiving section 7 is
It converts the speed of the facsimile image signal received via the I/O bus 4 and outputs it to the modem 8, and
It converts the speed of the facsimile image signal received from the modem 8 and outputs it to the I/O bus 4. modem 8
is connected between the procedure control unit 6, the facsimile image signal transmission/reception unit 7, and the NCU (network control unit) 9, and modulates and demodulates the facsimile image signal. Also, NCU
9 starts and restores the switching network connected via the line 10 under the control of the procedure control unit 6. Further, the CPU 1 takes in data of a line holding request, data of a line holding termination request, and data of a transmission request inputted by operating the operation panel 11 connected to the I/O bus 4, and stores them in the main memory 3.

The facsimile device configured as above is
It operates according to the program of the flowchart shown in FIG. 2 stored in the main memory 3.

First, in step 101, CPU1
Recommendation. The data necessary for sending the control signal of the pre-procedure (procedure before sending the facsimile image signal) based on T.30 and the data indicating a predetermined destination are given to the procedure control unit 6, and the exchange network by the NCU 9 , the procedure control unit 6 sends out a destination dial signal, and sends out a pre-procedure control signal.
Next, in step 102, the CPU 1 confirms that the previous procedure has ended, and then proceeds to step 103.
Sends the facsimile image signal prepared in the buffer memory 5 to the facsimile image signal transmitting/receiving section 7,
Execute transmission of facsimile image signal. Next, in step 104, the CPU 1 confirms that the transmission of the facsimile image signal has been completed, and proceeds to step 105 to check whether data for a line holding request is stored in the main memory 3. Here, if the above data is stored, then CPU1 goes to step 10.
Proceed to step 6 to check whether data for a line maintenance termination request is stored. At this time, if the line maintenance end request data is not stored, it is necessary to maintain the line, so the process advances to step 107 and the CCITT recommendation is completed. Provides data necessary for sending control signals including the EOM signal (message end signal) for the post-procedure (procedure after sending the facsimile image signal) based on T.30 to the procedure control unit 6, and controls the post-procedure. Causes the signal to be sent. Next, in step 108, the CPU 1 receives an MCF signal (a control signal indicating that the facsimile image signal has been correctly received) transmitted from the facsimile device on the receiving side, and then a DIS signal (a control signal indicating the standard function of the receiving side). ) has arrived and proceeds to step 109. In step 109, the CPU
1 supplies data to the procedure control unit 6 so that the flag field is transmitted for a predetermined time, and maintains the line. Next, the process advances to step 110, where the CPU 1 checks whether the main memory 3 stores data for a line maintenance termination request. If the line hold request data is not stored here, the process advances to step 111, where it is checked whether the main memory 3 has data for a transmission request stored therein. Here, when the above data is stored, since a transmission request has been made for the next page, the process advances to step 113 to execute the pre-procedure for transmitting the page.
The CPU 1 returns a DCS signal (a control signal for setting a function for the DIS signal), and also provides the procedure control unit 6 with data for transmitting control signals for subsequent pre-procedures, and proceeds to step 102. Further, if the data of the transmission request is not stored in the main memory 3 in step 111, and if a predetermined period of time has not elapsed since the start of sending the flag field, the process returns to step 109 and continues sending the flag field until the predetermined period of time has elapsed. If so, the CPU 1 determines that there is an abnormality because a transmission request has not been input within a predetermined time even though there is a line holding request (step 105), and proceeds to step 114 to send out a DCN signal (line disconnection command signal). to end communication. In step 105, if data for a line hold request is not stored, only one page is transmitted from the beginning, and in step 106 or 110, if data for a line hold end request is stored, indicates to end the transmission at the page currently being transmitted, so proceed to step 1.
Proceed to step 15. In step 115, the CPU 1 provides data to the procedure control unit 6 so that the post-procedure including transmission of an EOP signal (a control signal indicating that transmission of one page has been completed and there is no transport) is executed, and in step 116
After confirming the reception of the MCF signal, proceed to step 11.
Control is performed so that the DCN signal is transmitted so that the communication ends at step 7.

FIG. 3 shows the transmission control procedure when a line holding request is input from the operation panel 11 at point ○a in the above-mentioned facsimile apparatus. Figures 3 to 6
In the figure, T _X indicates a facsimile device on the transmitting side, and R _X indicates a facsimile device on the receiving side. Also, the same figure (Figures 4 to 6)
(The same applies in the figure), PIX is the facsimile image signal, RTC is the control signal indicating the end of the facsimile image signal, TCF is the training signal,
CFR indicates a control signal indicating reception preparation completion, and DCN indicates a line disconnection control signal. In the case of this figure, while the flag field is being transmitted for a predetermined period of time, the book serving as the original is taken out, the required page is searched, and the required page of this book is reset as the original.

FIG. 4 shows the transmission control procedure when a line holding termination request is input from the operation panel 11 at point ◯ before the transmission of the facsimile image signal is completed. In this case, the process branches to YES at step 106 in FIG. 2, and the communication ends normally.

FIG. 5 shows the transmission control procedure when a line hold termination request is input from the operation panel 11 at the time of ◯ during transmission of the flag field after the transmission of the facsimile image signal is completed. In this case EOP
A flag field is transmitted for a predetermined period of time prior to the signal. This time is originally for holding the line, but even if the holding of the line ends after that, if the length of the flag field is 2 or more, the CCITT recommendation is met. Since it does not violate T.30, after that, send the EOP signal excluding the flag field,
Communication ends normally. In this case, the flowchart of FIG. 2 proceeds from step 110 to step 115.

Fig. 6 shows that the transmission of the flag field has started, but a request for transmission or a request to end line holding is not obtained during the transmission of the flag field for a predetermined time, so a DCN signal excluding the flag field is transmitted following the flag field. It was designed to do so. Since the facsimile device on the receiving side receives the DCN signal after transmitting the DIS, if such a procedure is performed, it is possible to detect an abnormality in the facsimile device on the transmitting side. and,
In this case, by including the above-mentioned abnormality information in the communication management information of the receiving facsimile device, it can be useful for maintenance of the sending facsimile device.

FIG. 7 is a functional block diagram of this embodiment.
In the figure, reference numeral 71 indicates a line holding request detection means, 72 a flag field sending means for selectively sending out flag fields of different lengths, and 73 including the output of the line holding request detecting means 71, indicating whether the line holding is completed or not. A flag field sending means 72 based on all data possessed by the facsimile device such as a transmission request.
This control signal sending means sends out a control signal excluding the flag field following the flag field sent by the flag field.

For example, if a line holding request is detected, the control signal sending means 73 sends out a short flag field (usually 1 or 2) before the control signal until the arrival of the DIS signal. , also DIS
The flag field sending means 72 is configured so that a long flag field is sent out immediately after the arrival of a signal, and further, a short flag field is sent out before a control signal subsequent to the control signal following the long flag field. control and send out necessary control signals except for the flag field.

Also, if no line hold request is detected,
The flag field sending means 7 is arranged so that all short flag fields are sent before the control signal.
Control 2. Further, following the long flag field sent out by the flag field sending means 72,
line holding end data, which is given to the control signal sending means 73, indicating what control signal should be sent;
Determined based on data such as transmission request data.

In this way, in this embodiment, when the line should be held, the flag field is sent for a longer time than usual after the DIS signal sent from the receiving facsimile machine to maintain the line and to secure time for replacing originals, etc. It provides a transmission control procedure suitable for

[Effects of the Invention] As explained above, according to the present invention, the line is maintained by continuously transmitting the flag field, so that the necessary line is maintained with any facsimile device. can be performed using standard transmission control procedures, which is extremely convenient.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the main parts of a facsimile device adopting an embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation of the facsimile device shown in FIG. 1, and FIGS. FIG. 7 is a functional block diagram of an embodiment of the present invention, showing a transmission control procedure performed by the present invention. 1...CPU, 3...Main memory, 5...Buffer memory, 6...Procedure control section, 7...Facsimile image signal transmission/reception section, 8...Modem, 9...NCU,
DESCRIPTION OF SYMBOLS 10... Line, 11... Operation panel, 71... Line holding request detection means, 72... Flag field sending means, 73... Control signal sending means.

Claims (1)

[Scope of Claims] 1. In a transmission control method for a facsimile device in which a transmitting-side facsimile device and a receiving-side facsimile device perform transmission control by mutually transmitting and receiving control signals, the facsimile device detects a line holding request. a line holding request detecting means; a flag field sending means for sending a continuous flag field before each control signal of a transmission control procedure is to be sent when a line holding request is detected by the line holding request detecting means; When a line holding request is detected by the line holding request detecting means, a control signal including an EOM signal is sent, and the flag field sending means is activated based on the output of the line holding request detecting means and control data given to the facsimile device. and control signal sending means for sending a necessary control signal excluding the flag field following the flag field sent by the flag field sending means, and the line holding request detecting means detects the line holding request. When detected, the control signal sending means outputs the EOM.
The flag field transmitting means transmits a flag field under the control of the control signal transmitting means to maintain the line, and if there is a transmission request from the receiving facsimile device within a predetermined time, , after this, the control signal sending means is enabled to send out a control signal according to a standard transmission control procedure, and if there is no transmission request from the receiving side facsimile device within a predetermined time, the control signal sending means allows the control signal sending means to disconnect the line. A transmission control method for a facsimile device, which is characterized by making it possible to send control signals. 2 The control signal sending means conforms to the CCITT recommendations. A transmission control system for a facsimile apparatus according to claim 1, characterized in that a control signal according to T.30 is transmitted. 3. The flag field sending means is capable of continuously sending out the flag field only when the control signal to be sent is sent after the DIS signal sent from the facsimile device on the receiving side. A transmission control method for a facsimile device according to item 1 or 2.