JPH0458668A - Picture communication equipment - Google Patents

Abstract

PURPOSE:To avoid useless redial processing by inhibiting redial processing to a called equipment when a caller equipment receives an error notice from a called equipment and a type of the error is a fatal error. CONSTITUTION:At first a sender side terminal equipment sends a CSS (session start command) and when a receiver side terminal equipment has an error, an RSSN (session start negative response) is received. In this case, when a fatal error code exists in an NSC code of the RSSN, a succeeding communication sequence is interrupted. That is, when an error takes place in the receiver side terminal equipment, an error code is sent to reject the reception and when the sender side terminal equipment receives an error code and the error is the fatal error, redial is stopped and the stop of redialing of the sender side terminal equipment is informed to the sender side user.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an image communication device that receives images.

[Prior Art] Conventionally, before transmitting images between facsimile machines, it is necessary to detect an error in the receiving terminal, such as a printer, memory, etc.
When a fatal error occurs in reception processing and reception is rejected, the sending terminal unconditionally redials (trying to send).

[Problems to be Solved by the Invention] However, the above conventional example has the following drawbacks.

(1) When reception is rejected, communication time is wasted because the transmitting terminal unconditionally redials even if the receiving terminal has a fatal error.

(2) Even if the receiving terminal has a fatal error, the transmitting terminal redials unconditionally, so the user continues to wait in vain for successful dialing.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to enable an image communication device to perform appropriate dial processing without waste.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides an image communication device that transmits and receives image data between a calling device and a called device based on a predetermined communication procedure. , if an error that makes communication impossible is detected in the called device,
means for notifying the calling device of the occurrence and its type by a predetermined procedure signal; and when the calling device receives the error notification and the type of error is a fatal error, the called device A configuration was adopted that provided a means for prohibiting re-call processing to the device.

[Operation] According to the above configuration, it is possible to prohibit re-call processing to the called device depending on the type of error.

[Example J] Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

FIG. 1 shows the configuration of a facsimile machine employing the present invention. Here, the configuration of a G4 facsimile machine is shown.

In FIG. 1, reference numeral 1 denotes a CPU comprising a microprocessor or the like for controlling the entire facsimile machine. This control program for the CPU 1 is stored in the ROM 2. Various control data and image data are stored in RAM3.

The following components are connected to the CPUI.

Reference numeral 4 denotes a Coorg decoder that compresses and expands images, and is configured based on the MMR encoding method.

Reference numeral 5 denotes an operation panel consisting of a keyboard and a display for a user interface.

Reference numeral 6 denotes a league for inputting images, which includes a COD sensor, a scanning control system, and the like.

Reference numeral 7 denotes a printer for printing images, such as a laser beam printer.

Reference numeral 8 is a CCU that communicates with the line.

FIG. 2 shows a communication sequence according to the present invention.

The present invention is based on the type of line network (circuit switching, packet switching, etc.)
Therefore, FIG. 2 shows the communication sequence at the session layer and above in the O3I model.

First, a CSS (session start command) is sent from the transmitting (calling) side bundle, and if there is an error in the receiving (called) side bundle, an R55N (session start negative response) is received (sequence Q1). .

At this time, if there is a fatal error code in the NSC code of R55N, the following communication sequence is interrupted.

Here, fatal errors include the following:

(1) Printer failure (2) Coder/decoder failure (3) ROM, RAM failure, etc. Additionally, non-fatal errors include:

(1) Out of printer paper 2) Printer paper jam (3) Out of printer toner 4) Interruption by operator (5) Copying, report output, etc. If there is no fatal error code in the NSC code of R55N, C8 is transmitted again (redial: sequence Q2).

If the error on the receiving side is cleared during redialing, R55
P (session initiation positive response) is received (
Sequence Q3).

As a result, the transmitting terminal transmits a CDS (document start command) and transmits a CDUI including an image (sequence Q4).

After transmitting the image, the transmitting terminal transmits a CDE (document end command) and receives an RDEP (document end affirmative response) (sequence Q5).

Send I! Send C3E (Session End Command) from the II terminal, receive R5EP (Session End Affirmative Response) from the receiving terminal, and end the session (
Sequence Q6).

FIG. 3 shows the transmission control procedure of CPU 1 stored in ROM2. Here, the device of FIG.
Sending IN) shall be used as a terminal.

In step Sl, it is determined whether there is a transmission request from the panel 5. If there is a transmission request, the line is connected in step S2, and it is determined in step S3 whether there is a connection error. If there is a connection error, an image is input from the league and connected to the line in step S4, and the line is disconnected in step S5.

If there is a connection error in step S3, it is determined in step S7 whether it is the aforementioned fatal error.

In step S7, if there is no fatal error, a timer is started in step S8.If the timer times out in step 86, the process repeats from step S2.

In step S7, if there is a fatal error, a message indicating that redialing has been interrupted is output in step S9.

If there is no transmission request in step S1, it is determined in step SIO whether there is a reception request from the line. If there is a reception request, it is determined in step Sll whether there is an error in the receiving terminal.

If there is no error, the line is connected in step 512, the received image is output to the printer in step 513, and the line is disconnected in step S14.

If there is an error in step Sll, it is determined in step S15 whether it is a fatal error. If there is no fatal error, reject the connection without a fatal error code.

If there is a fatal error in step S15, step 5
17, there is a fatal error hood and the connection is refused.

According to the above embodiment, if an error occurs in the receiving terminal, it sends an error code and rejects the reception, and the transmitting terminal receives the error code and dials the fatal error. By canceling the call and notifying the sending user that the sending terminal has canceled the dialing, (1) the sending terminal will unconditionally redial even if the receiving terminal has a fatal error; You don't have to use up a lot of communication time.

(2) Due to the unconditional dialing of the sending terminal, the user does not have to wait in vain for a successful redial.

This has an excellent effect.

In the embodiments described above, the transmitting terminal permanently disconnects the connection based on an error code, depending on whether or not the receiving terminal has a fatal error. However, the user may be able to register or change whether the error code is fatal or not from the panel 5.

Although the G4 facsimile procedure has been exemplified above, similar control is possible even when using other image communication procedures.

Further, although the image transmission direction is from the calling side to the called side, similar processing is possible even when the image transmission direction is reversed, such as in the case of polling.

[Effects of the Invention] As is clear from the above, according to the present invention, in an image communication device that transmits and receives image data between a calling device and a called device based on a predetermined communication procedure, the called device means for notifying the calling side device of the occurrence of the error and its type by a predetermined procedure signal when an error that makes communication impossible is detected in the device; If the type of error is a fatal error, a configuration is adopted that prohibits re-calling processing to the called-side device, so that re-calling processing to the called-side device is prohibited depending on the type of error. can,
There is no need to perform unnecessary re-call processing, the calling device does not have to redial unconditionally and waste communication time, and the calling user can confirm the success of the dialing due to unnecessary dialing. This has the excellent effect of not having to wait unnecessarily.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a facsimile device adopting the present invention, FIG. 2 is an explanatory diagram of a procedure signal sequence showing the communication procedure in the device of FIG. 1, and FIG. 3 is a call control of the CPU of FIG. 1. It is a flowchart figure of a procedure. 1-CPU 2--ROM3--RA
M 4--User decoder 5--Operation panel 6--Reader 7--Printer
8...CCUG4 facsimile Atsuoki's 7'l:l -
,'7 eFig. 1

Claims (1)

[Claims] 1) In an image communication device that transmits and receives image data between a calling device and a called device based on a predetermined communication procedure, an error that makes communication impossible is detected in the called device. means for notifying the calling device of the occurrence of an error and its type by a predetermined procedure signal; An image communication device characterized by comprising means for prohibiting re-calling processing to a called device. 2) The image communication system according to claim 1, further comprising means for notifying the user of the calling device that redialing has been canceled when re-call processing for the called device is prohibited. Device. 3) The image according to claim 1 or 2, characterized in that the calling side device is provided with means for setting the type of fatal error that should prohibit re-call processing to the called side device. Communication device.