JPH05292278A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To shorten communication time in the case of a mode change concerning the multi-page protocol control of a group-3 equipment provided with an ECM. CONSTITUTION:When there is the mode change concerning the multi-page protocol control of the group-3 equipment provided with the ECM, a message end signal (EOM) is transmitted from a transmitting station in a phase D. After this EOM is detected, a receiving station transmits a message confirmation signal (MCF) to the transmitting station. Only when the MCF from the receiving station is detected, the transmitting station transmits a calling tone (CNG) to the receiving station, returns to a phase B and starts monitoring a digital identification signal (DIS.) The receiving station can transmit the DIS by immediately returning to the phase B without waiting for 6 seconds after detecting the CNG from the transmitting station, and there is no protocol problem. Therefore, the communication time is shortened, the communication tariff is reduced as well, and the facsimile equipment can be efficiently utilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to a facsimile machine which executes multi-page protocol control of group 3 equipment including ECM.

[0002]

2. Description of the Related Art A conventional facsimile apparatus uses a multi-page protocol control for communication when changing attributes of an original such as the original size and the resolution of a read image (mode change) while transmitting an original having a plurality of pages. It took a long time. Therefore, in order to reduce the communication time at the time of mode change, the conventional facsimile apparatus is
There were methods such as full-duplex automatic repeat request (ARQ) and negotiation with V21 post message.

However, in the conventional facsimile apparatus, there has been no attempt to shorten the communication time at the time of mode change by using the existing calling tone (CNG) signal.

[0004]

As described above, in the conventional facsimile apparatus, the multi-page protocol when a mode change occurs is defined by the CCITT recommendation as follows. FIG. 3 is a signal sequence chart according to CCITT recommendation of a conventional facsimile apparatus.

As shown in FIG. 3, in the conventional receiving side facsimile apparatus (hereinafter, also referred to as a receiving station), the message is transmitted from the transmitting side facsimile apparatus (hereinafter, also referred to as a transmitting station) in phase D when the mode is changed. A signal (hereinafter referred to as EOM) is sent, and as a positive response to this, a message confirmation signal (hereinafter referred to as MCF) indicating that the message has been completely received is sent,
There was a waiting time of 6 seconds before returning to the phase B and sending the digital identification signal (hereinafter referred to as DIS) by the receiving station again. That is, if the receiving station does not receive the MCF after transmitting it, the receiving station continuously monitors the post message for 6 seconds in preparation for the second EOM transmission from the transmitting station.

Then, after the above-mentioned 6 seconds have elapsed, the receiving station returns to phase B and sends out the DIS, as indicated by the arrow on the right side in FIG. Further, on the transmitting station side, when the MCF from the receiving station is detected, as shown by the arrow on the left side of FIG. 3, the transmitting station side immediately returns to phase B and starts the operation of detecting the DIS from the receiving station.

As described above, in the conventional facsimile apparatus, the waiting time of 6 seconds is always required when changing the mode, so that there is a problem that the communication time becomes longer accordingly. The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a facsimile apparatus capable of shortening the communication time at the time of mode change in the multi-page protocol control of the group 3 equipment including the ECM. And

[0008]

According to the present invention, in a facsimile apparatus for performing multi-page protocol control of a group 3 device including an ECM for transmitting a document from a transmitting station to a receiving station, the transmitting station side sends a message end signal ( EOM) is sent to the receiving station, and a response to the message confirmation signal (MCF) from the receiving station is detected, and then a calling tone (CNG) is sent again to the receiving station. On the receiving station side, after sending the message confirmation signal (MCF) to the transmitting station, detection of a calling tone (CNG) is started while monitoring the V21 signal,
It is characterized in that a digital identification signal (DIS) is sent to the transmitting station immediately after the detection of the calling tone (CNG) to perform multi-page protocol control when a mode change occurs.

[0009]

In the present invention, the transmitting station sends the EOM to the receiving station in phase D, detects the response from the receiving station by the MCF, and then sends CNG to the receiving station.
On the receiving station side, after transmitting the MCF to the transmitting station, detection of the CNG is started while monitoring the V21 signal, and when the CNG is detected, the DIS is transmitted to the transmitting station immediately. Therefore, in the facsimile apparatus of the present invention, the conventional C
The waiting time of 6 seconds required in the standard sequence recommended by CITT can be omitted, and the communication time can be shortened.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. First, the configuration will be described. FIG. 1 is a block diagram showing the configuration of an embodiment of a facsimile apparatus according to the present invention.

In the figure, 1 is a CPU (Central Process)
sing unit) that controls the entire system.
Reference numeral 2 denotes a ROM (Read Only Memory), which stores firmware that determines the control operation of the CPU 1, and also stores a program that performs the multi-page protocol control of the present invention. 3 is a RAM (Random Access Memory),
A work area and a temporary storage area required for the CPU 1 to perform control are formed. A scanner 4 reads image information while conveying a document to be transmitted line by line. A plotter 5 receives the binarized image data and prints it on recording paper. 6 is N
A CU (network control unit) is connected to a public line and executes a communication procedure necessary for communication with a partner station when transmitting / receiving image data. A communication control unit 7 activates both a V21 detecting unit 9 and a CNG detecting unit 10, which will be described later, in phase D on the receiving station side to monitor the V21 signal and detect the CNG from the transmitting station. .. Reference numeral 8 is a V21 signal sending unit that sends a V21 signal to the partner station and sends V2 signal of the partner station.
By detecting this by the 1 detection unit 9, the presence or absence of a frame error is detected. Reference numeral 10 is a CNG detector, which is a calling tone (C
NG) is detected. A modem 11 modulates and demodulates an image signal for transmitting and receiving data between facsimile devices connected via a line.
Reference numeral 12 denotes a system bus, which is a data path for exchanging data between respective units of the facsimile apparatus.

As described above, the basic hardware configuration of the facsimile apparatus according to this embodiment is substantially the same, but the communication control unit 7 on the receiving station side is the phase D in this case.
In, the ROM 2 is programmed so that the V21 detection unit 9 and the CNG detection unit 10 are activated to monitor the V21 signal and start the detection of CNG.

Next, the operation will be described. FIG. 2 is a signal sequence chart in the facsimile apparatus of the present invention. As shown in FIG. 2, first, when CNG is transmitted from the transmitting station, the receiving station identifies the called terminal identification signal (hereinafter, C
Then, a digital identification signal (hereinafter referred to as DIS) indicating that the receiving station has a CCITT standard receiving function is sent to the transmitting station. Whether or not the terminal of the partner station has the function in this embodiment is confirmed by the negotiation here.

Next, the transmitting station transmits a digital command signal (hereinafter referred to as DCS) indicating a function set among the standard functions displayed by the received DIS signal, and further, the modem which receives the facsimile message. Send a Training Check (TCF) to confirm training. On the other hand, the receiving station responds by sending a reception preparation confirmation signal (hereinafter referred to as CFR), which is a response signal indicating that the procedure before sending the message is completed and the sending of the message may be started. .. The procedure up to this point is the phase B procedure.

Next, in phase C, a message is sent from the transmitting station to the receiving station by PIX. Then, in phase D, which is a characteristic embodiment of the present invention, when there is a mode change, the transmitting station sends an EOM for returning the procedure to the end of the page of the facsimile message and the beginning of phase B. If there is no mode change here, a multi-page signal (hereinafter referred to as MPS) for returning the procedure to the end of the page of the facsimile message and the beginning of the phase C is sent, so that the receiving station can judge by this. ..

Next, when the receiving station detects this EOM,
The MCF which is an affirmative response to the EOM is transmitted, and the transmitting station transmits the CNG to the receiving station only when the MCF is detected. That is, the transmitting station does not return to the phase B unless it detects the MCF from the receiving station. Here, the receiving station of the present embodiment, after returning the MCF in phase D, activates the V21 detection unit 9 and the CNG detection unit 10 that monitor the V21 signal by the communication control unit 7. When the receiving station detects the CNG sent from the transmitting station, the transmitting station can determine that it has detected the MCF sent by the receiving station.

That is, it is estimated that the transmitting station has returned to the phase B and has started the DIS detecting operation. For this reason, when this CNG is detected on the receiving station side, there is no problem in terms of the protocol even if it immediately returns to phase B and sends DIS. As described above, the facsimile apparatus of the present embodiment requires a waiting time of 6 seconds when the mode is changed in the conventional facsimile apparatus (see FIG. 3), but the waiting time of 6 seconds should be eliminated. As a result, the communication time can be shortened. As a result, communication charges have been reduced, and it has become possible to improve the efficiency of use of the facsimile device.

In this embodiment, there is no need to add new parts to the conventional hardware configuration and it can be realized by developing application software. Can be shortened.

[0019]

According to the present invention, since the receiving station sends the DIS to the transmitting station immediately after detecting the CNG from the transmitting station, the waiting time of 6 seconds is omitted even when the mode change occurs. It has become possible to shorten the communication time.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a facsimile apparatus according to the present invention.

FIG. 2 is a signal sequence chart in the facsimile apparatus of the present invention.

FIG. 3 is a signal sequence chart according to CCITT recommendation of a conventional facsimile apparatus.

[Explanation of Codes] 1 CPU 2 ROM 3 RAM 4 Scanner 5 Plotter 6 NCU 7 Communication Control Section 8 V21 Signal Sending Section 9 V21 Detection Section 10 CNG Detection Section 11 Modem 12 System Bus

Claims (1)

[Claims] 1. An ECM for transmitting a document from a transmitting station to a receiving station.
In a facsimile apparatus for performing multi-page protocol control of group 3 equipment including the above, the transmitting station side sends a message end signal (EOM) to the receiving station, in response to which a message confirmation signal (MCF) from the receiving station is sent. After detecting the response by the calling party, a calling tone (CNG) is sent again to the receiving station, and one receiving station side sends the message confirmation signal (MC
F) is sent to the transmitting station, detection of a calling tone (CNG) is started while monitoring the V21 signal, and as soon as the calling tone (CNG) is detected, a digital identification signal ( A facsimile machine characterized in that the multi-page protocol control is performed when a mode change occurs by sending DIS).