JPH05122486A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To prevent fast communication processing from being disturbed by slow communication processing. CONSTITUTION:In facsimile reception other than the one of G4, the null capacity of image memory is detected in step S12, and when the null capacity shows a value over constant quantity (N), processing advances to step S14, and the accumulative reception of G3 reception data is performed. However, when the null capacity shows a value less than the constant quantity, the processing advances to step S13, then, reception data is immediately outputted (print out). In step S15, a timer is set, and when the timer is timed out after awaiting time-up in step S16, it is confirmed again whether or not the reception of G4 is performed in step S17, and when the reception of G4 is performed, the accumulative reception of G3 is continued in step S19. However, when it is decided that no reception of G4 is executed in step S17, the processing advances to step S18. and G3 reception data is switched to immediate output, and accumulated data is outputted (printed out).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile device for communicating at a plurality of different communication speeds.

[0002]

2. Description of the Related Art In recent years, Huaximiri has spread widely into society and has become an essential device as a business tool. On the other hand, with regard to communication lines, ISDN (Integrated Digital Line Network) services have been started, and integration of communication services is in progress. This ISDN can be connected to the existing public telephone line network (PSTN). Therefore, the equipment used in connection with the ISDN is in most cases capable of communicating with both the G4 equipment connected to the ISDN and the G3 equipment connected to the PSTN. Further, in communication in ISDN, the basic interface has two data channels, and these channels enable two communications at the same time.

[0003]

However, the facsimile machine connected to the above ISDN and used has two communication capabilities of G3 and G4,
Since it has two data channels, the following problems arise with regard to simultaneous communication. For example, in a process in which two data channels are simultaneously received, since there is only one device for outputting the received information, a large capacity memory is required or a high speed output device is required. I'm going out. Conversely, if the fax machine has only a small amount of memory, or if the output device is slow, on the other hand, processing such as receiving information on the one hand and rejecting the incoming call as busy may be performed. I am doing it.
If the incoming call is rejected due to busyness, the sender may perform redial processing, but this redial is often limited in number. , As a result, a communication error occurs. The present invention has been made in view of the above points, and an object of the present invention is to achieve G3, G even in an output device having a normal output speed with a memory having a relatively small capacity.
It is an object of the present invention to provide a facsimile device capable of handling four simultaneous receptions.

[0004]

In order to solve the above-mentioned problems, the present invention detects a memory for accumulating received data and a free space of the memory in a facsimile device for communicating at a plurality of different communication speeds. And a first control for prohibiting output of received data for a predetermined period and accumulating the received data in the memory when the free space of the memory is a certain amount or more when the communication speed is low. Means, second control means for controlling to output data received at the high communication speed when there is an incoming call at the high communication speed within the predetermined period, and control by the second control means And a means for outputting the data accumulated by the first control means after the end.

[0005]

In the above structure, the high-speed communication process is prevented from being hindered by the low-speed communication process.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a block diagram showing the overall configuration of a facsimile machine according to an embodiment of the present invention. In the figure, the control unit 1 includes a CPU, R (not shown).
It is a micro computer composed of OM, RAM, IC for clock, I / O, CG, ROM, etc. The software control of this micro computer controls the operation of the whole facsimile machine and manages various data.

The operation unit 2 is composed of various keys, a display unit and the like (not shown), and accepts key input by an operator and displays various information. The reading unit 3 is composed of a CCD, an AD conversion circuit, an image processing circuit and the like (not shown), and performs photoelectric conversion and A conversion on the optically read data.
Image processing such as D conversion, image correction, and binarization processing is performed.
Then, the recording unit 4 outputs an image by, for example, a thermal printer, a laser beam printer, or the like, and the reading unit 3
The image data read or received, or the image data formed by the control unit 1 is output.

The communication control section 5 is composed of a compression code encoding / decoding processing circuit, a line interface, a telephone circuit, etc. (not shown), and performs transmission / reception of image data and character data and control of incoming / outgoing calls of telephones. In addition, the image memory 6
Stores read image data, received image data, and the like. The control unit 1, the reading unit 3, and the like are connected to each other via a data transmission path 7 and send and receive image data, control data, and the like.

Next, a communication control procedure in the facsimile apparatus according to this embodiment will be described. 2 and 3
By connecting the facsimile machine according to the embodiment to the ISDN,
It is a sequence diagram which shows a control procedure when performing a call setup and a call release using the D channel of ISDN.

In FIG. 2, if the called side receives the SET UP message and is ready to receive the call, ALERT is set.
When the ING / CONNECT is sent, the incoming state is entered and the Data Transfer Phase is entered.
Then, when a DISCONNECT message is issued via the Data Transfer Phase, the RE
Cut the channel with LEASE, then RELEASE C
The call release by OMPLETE is completed.

However, if the incoming call is not possible, as shown in FIG.
As shown in the communication sequence, the incoming call is rejected by sending the DISCONNECT message after receiving the SET UP message, and then the channel disconnection by RELEASE, RELEASE COMPLETE
The call is released by. Figure 4 shows the call setup message (SE
T UP message) showing the information content,
FIG. 5 shows the information transfer capability in the transfer capability information element.

Therefore, the control procedure in the facsimile machine according to the present embodiment, which has the above-described configuration and control procedure, will be described.
A description will be given according to the flow charts shown in FIGS. In steps S1, S2 and S3 of FIG. 6, an incoming call process is performed. That is, SABME is received in step S1, UA (Unnumbered Acknowledge) is transmitted in step S2, and SET UP message is received in step S3. In the following step S4, the information transmission capability in the SET UP message is detected to determine whether or not it is 3.1 KHz audio. If it is determined to be 3.1 KHz audio, it is determined that the call is an incoming call from the PSTN, and steps S5 (ALERTING message transmission), S6 (CONNECT message transmission), S6
After performing the process 7 (receiving the CONNECT ACKNOWLEDGE message), the process proceeds to the data transfer phase of step S8.

At step S9, it is determined whether the incoming call is G3 reception or telephone incoming call. If it is G3 reception, the process proceeds to step S10 to start reception at G3. Then, in the next step S11, it is confirmed whether or not the reception by the G4 has already been performed. If the G4 is not being received, the free space (memory remaining amount) of the memory (image memory) in the step S12 (FIG. 7). To detect. As a result of the detection in step S12, if the free space is larger than a certain fixed amount (here, it is N), the process proceeds to step S14, where G
3 Received data is accumulated and received. However, if the free space is less than a certain amount, the process proceeds to step S13 to immediately output (print out) the received data.

When the free space of the memory is larger than a certain fixed value, the accumulation and reception are executed in step S14 as described above, the timer is set in the following step S15, and the time-up is waited in step S16. Then, when the timer times out, in step S17 it is checked again whether or not the reception by G4 is being performed. If the G4 reception is being performed, the accumulation reception by G3 is continued. However, in step S17, G
If it is determined that the 4 reception is not executed, the process proceeds to step S18, the G3 reception data is switched to the immediate output, and the accumulated data is output (printed out). Even if there is G3 reception while G4 reception is being executed, G4
Since the reception and the output processing thereof are completed earlier than the G3 reception is completed, even if the memory capacity is not made large, there is no memory overflow due to the G3 reception.

As described above, according to this embodiment,
When data is received by G3, which has a low communication speed, the remaining amount of image memory in the fax machine is detected,
When the remaining amount of memory is equal to or more than a certain amount, G3 reception data is not stored in the image memory and output for a certain period, and when G4 having a high communication speed is received within the certain period, The output of the data received by G3 is
This is performed after the data received in 4 is output. However, when there is no incoming call of G4 within a certain period of time, by outputting the G3 reception data, the device for output is not occupied by the low-speed G3 reception, and G4 is received even during the reception of G3. It becomes possible to accept the reception, and the low-speed G3
There is an effect that communication can be smoothly performed without rejecting G4 reception for reception.

Further, since the G3 reception data is stored only when the G4 call is received within a certain period, the memory capacity for storing the data is small, and the high speed printout is not required. There is. The present invention may be applied to a system including a plurality of devices or an apparatus including a single device.

[0017]

As described above, according to the present invention,
Accumulation of low-speed data reception contents in the image memory, prohibition of output, and if there is high-speed reception data in the meantime, low-speed reception data output processing by outputting the low-speed reception data after output Thus, there is an advantage that high-speed reception data processing is not disturbed and smooth communication can be performed. Further, by accumulating the low-speed reception data according to the capacity of the image memory, there is an effect that the memory capacity for accumulating the data can be small.

[Brief description of drawings]

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

[Fig. 2]

FIG. 3 is a sequence diagram showing a control procedure when a facsimile machine according to an embodiment is connected to an ISDN to perform call setup and call release;

FIG. 4 is a diagram showing information contents of a call setting message,

FIG. 5 is a diagram showing information transfer capability in a transfer capability information element;

[Figure 6]

FIG. 7 is a flow chart showing a control procedure in the facsimile machine of the embodiment.

[Explanation of Codes] 1 control unit 2 operation unit 3 reading unit 4 recording unit 5 communication control unit 6 image memory 7 transmission path

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Claims (1)

[Claims] 1. A facsimile device for communicating at a plurality of different communication speeds, a memory for accumulating received data, a means for detecting a free space of the memory, and a free space of the memory when the communication speed is low. Is a certain amount or more, the output of received data is prohibited for a predetermined period, and the received data is controlled to be stored in the memory.
And a second control means for controlling to output the data received at the high communication speed when there is an incoming call at the high communication speed within the predetermined period. And a means for outputting the data accumulated by the first control means after completion of the control by.