JPH066562A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To prevent interruption of a line due to expiration of a timer even when it takes much time to read direct communication by setting a time of the watchdog timer monitoring the presence of transmission/reception of a command with an opposite terminal equipment for each communication after line connection. CONSTITUTION:The transmission is started by a command of the operator and a communication control section 6 is used to connect layers 2--4 and to discriminate whether or not the transmission service is direct transmission. In the case of the direct transmission, a time being thrice the system fixed time is set to a non-communication watchdog timer used to decide a parameter of CSS and a CSS command is sent to a receiver side facsimile equipment. On the other hand, in the case of other transmission mode than the direct transmission, the system fixed time is set to the watchdog timer and the CSS command is sent. Even when it takes much time to make the reading complete in the case of the direct transmission, the line interruption due to the expiration of the watchdog timer is prevented by setting a different communication time to the timer depending on each service.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication timer in a facsimile machine.

[0002]

2. Description of the Related Art In a conventional facsimile machine, the value of a non-communication monitoring timer is fixed by the system when transmitting. Further, when communication is performed by a facsimile device conforming to the OSI7 layer, the value of the response waiting timer in the session layer is also fixed in the system.

[0003]

However, in the above-mentioned conventional example, since the value of the non-communication monitoring timer is fixed in the system, the image data is transmitted after the line is connected depending on the type of transmission service. It took a long time until the fixed timer value timed out and the communication was disconnected.

Further, in the above-mentioned conventional example, since the value of the response waiting timer is fixed in the system, depending on the type of receiving service, it takes time to connect the line to receive the image data and return the response. , There was a case where the fixed timer value timed out and the communication was disconnected.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a facsimile apparatus which can communicate with an appropriate timer value and can prevent a communication error due to a communication timeout.

[0006]

According to the present invention, after connection of a line,
A facsimile apparatus having a function of instructing a receiving side of a timer value for monitoring whether or not a command is transmitted / received to / from a partner terminal, characterized in that the timer value is set for each communication.

Further, the present invention is characterized in that, in a facsimile apparatus conforming to the OSI7 layer, the reception side instructs the response side timer in the session layer to the transmission side.

[0008]

1 is a block diagram showing a first embodiment of the present invention.

In this embodiment, a color / monochrome facsimile apparatus connected to an ISDN network will be described as an example. In the present embodiment, a case will be described in which the timer is changed only when the direct transmission service is performed after the line is connected and the image read by the scanner is transmitted without being stored in the hard disk.

In FIG. 1, a CG (character generator) circuit 1 is a circuit for generating characters to be printed on a communication report, a page header or the like.

The CPU control circuit 2 is a circuit that has a ROM section and a RAM section and controls the entire system.

A DAM (Direct Memory Access) control circuit 3 is a circuit for transferring image data between memories without passing through a CPU.

The color / monochrome conversion circuit 4 has a γ conversion circuit for converting a CMYK image into an RGB image and an RGB image into a CMYK image, and converts a color image into a monochrome image.
This is a circuit for converting a multi-valued image into a binary image.

The frame memory 5 is a memory for expanding image data for each block.

The communication control unit 6 controls a call to and from a partner terminal and transmission / reception of image data using a communication protocol.

The I / O controller 7 controls the key input device 8, the display device 9, the scanner device 10 and the printer device 11.

The key input device 8 is a device that has, for example, a one-touch key, a ten-key pad, a start button, and a stop button, and receives instructions from the user through various key inputs.

The display device 9 is a device for displaying various messages to the user by displaying a message on the LCD and turning on / off the LED so as to notify the user of various information such as memory full, no paper, out of ink, and communication status. Is.

The scanner device 10 is a device for reading a document in a designated mode such as paper size, characters / photographs, density, color / monochrome, etc.

The printer device 11 is a device for outputting image data and character data on recording paper.

The image coding / decoding circuit 12 is a circuit for compressing and expanding color and monochrome image data.

Scsi (Small Compuetr System Interf
ace) 13 controls the interface with the hard disk.

Further, this system has a non-volatile memory 14 represented by a hard disk, an image data bus 15 as an image path, a system bus 16 for controlling the entire system, and the like.

FIG. 2 is a schematic diagram in which only the session layer is described in the communication sequence in this embodiment. C in the figure
Reference numeral 1 is a CSS (command session start) command, which is a session start request, and C2 is an RSSP.
(Response session start positive) command is an affirmative response of the CSS.

Further, C3 is a CDCL (command document capability list) which is a command for declaring attributes of a document to be transmitted, and C4 is RDCLP (response document capability list positive).
The command is an acknowledgment of the CDCL.

Further, C5 is a CDS (command document start) command, which is a request to start document transfer, and C6 is a CDUI (command document user information) command, which is a command for transmitting image data.

C7 is a CDBP (command document page boundary) command, which is a command indicating a page boundary. C8 is an RDPBP (Response Document Page Boundary Positive) command, which is an affirmative response of the CDBP.

Further, C9 is a CDE (command document end) command, which is a document transfer end request, and C10.
Is an RDEP (Response Document End Positive) command, which is an affirmative response of the CDE.

C11 is a CSE (command session end) command, which is a session end request,
C12 is a RSEP (Response Session End Positive) command, which is a positive response to the CSE.

FIG. 3 shows the CSS command and RSSP.
It is a schematic diagram explaining the parameter format of a command.

In the figure, the first field F1 is a CSS command, the second field F2 is a CSS parameter,
The third field F3 is the parameter of the non-communication monitoring timer in the CSS parameters, and the fourth field F4 is the RS
The SP command, the fifth field F5 is the RSSP parameter, and the sixth field F6 is the non-communication monitoring timer parameter in the RSSP parameters.

FIG. 4 is a flow chart showing the transmission sequence in this embodiment.

First, transmission is started according to an operator's instruction (S11), layers 2 to 4 are connected using the communication control unit 6 (S12), and it is determined whether the transmission service is direct transmission (S13).

Then, in the case of direct transmission,
In S14, a value three times the system fixed value is set in the non-communication monitoring timer, which is a CSS parameter, the CSS command is sent to the receiving facsimile, and in S16, C2 shown in FIG.
The subsequent transmission process is performed by transmitting and receiving the following commands, and when the process is completed, the process proceeds to S17, the layers 2 to 4 are disconnected, and the process ends at S18.

If the transmission is not direct transmission in S13, a system fixed value is set in the non-communication monitoring timer in S15, a CSS command is transmitted, and S
Proceed to 16.

In the first embodiment described above, the non-communication monitoring timer which is a parameter of CSS and RSSP of the session layer is used, but the non-communication monitoring timer which is a parameter of CDCL and RDCLP may be used. Further, although the color / monochrome facsimile is used in the above-described embodiment, the same applies to the monochrome facsimile. Also, in the case of direct transmission, we set three times the system fixed value,
Another value may be set for direct transmission.

Next, a second embodiment of the present invention will be described. The system configuration of the second embodiment is the same as that shown in FIG.
2 and the communication sequence is shown in FIG.
It is assumed to be the same as that shown in. Also in this second embodiment, a color / black and white facsimile apparatus connected to the ISDN network will be described as an example. Further, in the second embodiment, the case where the timer is changed only during the direct reception service in which the received image is output to the printer without being stored in the hard disk and a response is returned after the output is completed will be described.

FIG. 5 is a schematic diagram for explaining the parameter format of the RSSP command.

In the figure, the first field F11 is an RSSP.
Command, the second field F12 is a parameter of RSSP, the third field F13 is a non-standard function in the RSSP parameter, and the fourth field F14 is a response waiting timer in the non-standard function.

FIG. 6 is a flow chart showing the reception sequence in this embodiment.

First, when an incoming call is received in S21, layers 2 to 4 are connected using the communication control unit 6 (S22), and CS
When S is received (S23), it is determined whether the service is direct reception (S24).

Then, in the case of direct reception,
In S25, the value desired by the receiving side is set to the response waiting timer value of the non-standard function which is a parameter of RSSP, and R
The SSP command is sent to the sending facsimile and S27
Then, the subsequent reception processing is performed by transmitting and receiving the commands after C2 shown in FIG. 2, and when the processing is completed, the processing proceeds to S28, the layers 2 to 4 are disconnected, and the processing ends at S29.

If the direct reception is not made in S24, the RSSP command is sent without setting the response waiting timer value of the non-standard function in S26, and S2 is sent.
Proceed to 7.

In the second embodiment described above, the NSC (non-standard function) which is the parameter of the RSSP of the session layer is used, but the NSC which is the parameter of RDCLP is used.
(Nonstandard function) may be used. Further, although the color / monochrome facsimile is used in the above-described embodiment, the same applies to the monochrome facsimile.

[0045]

As described above, according to the first aspect of the present invention.
According to, you can set the communication timer for each service,
For example, to prevent disconnection of the line due to timeout of the communication monitoring timer even if it takes time to finish reading when direct transmission is started after the line is connected according to the capability of the other terminal and data is transmitted after the end. There is an effect that can be.

Further, according to claim 5 of the present invention, the response waiting timer on the transmission side can be set for each reception service. Therefore, for example, when performing direct reception for outputting while receiving, after completion of data reception, the document is returned. Even if the output takes time and the response is delayed, the line disconnection due to the timeout of the response waiting timer can be prevented.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a schematic diagram in which only a session layer describes a communication sequence in the first embodiment.

FIG. 3 is a schematic diagram showing a format example of CSS and RSSP in the first embodiment.

FIG. 4 is a flowchart showing a transmission operation of the first embodiment.

FIG. 5 is a schematic diagram showing a format example of RSSP in the second embodiment of the present invention.

FIG. 6 is a flowchart showing a receiving operation of the second embodiment.

[Explanation of symbols]

 1 ... CG circuit, 2 ... CPU control circuit, 3 ... DMA control circuit, 4 ... Color / monochrome conversion circuit, 5 ... Frame memory, 6 ... Communication control unit, 7 ... I / O control unit, 8 ... Key input device, 9 ... Display device, 10 ... Scanner device, 11 ... Printer device, 12 ... Image encoding / decoding circuit, 13 ... Scsi interface, 14 ... Hard disk, 15 ... Image bus, 16 ... System bus.

Claims (8)

[Claims] 1. A facsimile apparatus having a function of instructing a receiving side of a timer value for monitoring whether or not a command is transmitted / received to / from a partner terminal after connecting a line, and having a means for setting the timer value for each communication. A facsimile device characterized by the above. 2. The facsimile apparatus according to claim 1, wherein the timer is a session layer non-communication monitoring timer in the OSI 7 layer. 3. The facsimile apparatus according to claim 1, further comprising means for automatically setting the timer value according to the type of transmission service. 4. The facsimile apparatus according to claim 3, wherein the transmission service is direct transmission. 5. A facsimile apparatus conforming to the OSI7 layer, characterized in that it has a means for a receiving side to instruct a transmission side timer for a response wait timer in the session layer. 6. The facsimile apparatus according to claim 5, further comprising means for changing the value instructed by the receiving side in the response waiting timer in communication units. 7. The facsimile apparatus according to claim 5, further comprising means for changing the value instructed by the receiving side in the response waiting timer according to the type of receiving service. 8. The OS according to claim 5, wherein an instruction from the receiving side of the response waiting timer value is issued from the OS.
Facsimile apparatus characterized by performing non-standard function of session layer parameter in 7 layers of I.