JPS6051045A - Facsimile store and forward switching device - Google Patents

Abstract

PURPOSE:To enable transmitting side to take a correct measure by sending resending request telegram data to transmitting terminal when a facsimile signal is not received correctly due to trouble of own equipment and making a cue and erasing the resending request telegram when received to the last. CONSTITUTION:A picture signal stored in a picture memory 6 is sent out to called terminals 21-24 by a communication controlling device 5 by executing transmission controlling procedure under control of a CPU7. In the CPU7, on receiving ID data 22 of transmitting terminal, a resending telegram preparing device 21 prepares resending request telegram data 23 in specified format and outputs it. The device 21 outputs resending request telegram data 23 only when it receives a sending instruction signal 26 from a device 25 that discriminates cause of impossibility of receiving. When it receives a final original receiving signal 31 from a final original deciding device 30, it erases prepared resending request telegram data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] This invention relates to an improvement in a facsimile storage and forwarding device.

[Technical background of the invention]

FIG. 1 shows a facsimile system using a conventional facsimile storage and forwarding device. In the figure, 1 indicates a facsimile storage and forwarding device, and 2 indicates a terminal (facsimile machine, facsimile storage and forwarding device, etc.). Terminal 2 and
The facsimile storage and forwarding device 1 is connected via a public communication network 3 and an exchange 4. The facsimile volume exchange device 1 includes a communication control unit 5, an image storage device 6, a central processing unit (hereinafter referred to as CPU) 7, and a core memory 8, and uses facsimile signals (hereinafter referred to as It receives an image signal (referred to as an image signal), stores it in the image storage device 6, and further transmits the image signal stored in the image storage device 6 to the receiving terminal.

Such a facsimile storage/exchange device [1] operated as shown in the flowchart of FIG. In other words, CPU7
However, via the communication control device 5, it is confirmed whether or not a call has been received from a certain terminal. When an incoming call is received, the CPU 7 checks the ID data of the transmitter 1 via the communication control device 5.

After this, the image signal reception operation begins, and it is confirmed whether or not it has been received correctly. If it is correctly received, the received image signal is sent to the receiving terminal via
ueue, ) in the image storage device 6, which is an external storage device, and sends communication result data indicating that it was correctly received. Furthermore, if the image signal cannot be received correctly, communication result data to that effect is sent to the transmitting terminal.

In this way, after sending the communication result data to the sending terminal, it is checked whether all the communication of image signals for the original to be received has been completed, and the ν1lfi+
When there is an image signal for , the process returns to the determination step of determining whether or not both signals have been correctly received, and the process operates according to the flowchart below. In the step of confirming whether or not all image signal communication for the originals to be received has been completed, there is no image signal for the continuously sent originals! When l'II is disconnected, the reception operation ends.

In such a facsimile storage and forwarding device 1, if the facsimile storage and forwarding device 1 goes down due to a power outage, software failure, hardware failure, etc. Then, the image signal cannot be received correctly.However, no special measures are taken to deal with this, and later, for example, the operator refers to the journal record of the communication results and sends the facsimile for each document. ) Only by searching for the record of the information indicating that it was correctly received that was returned from the storage and forwarding device 1, and knowing that the image signal of the document for which the information that it was correctly received was effectively received 4g. there were.

[During background technology! Yo point]

For this reason, it takes a long time to learn that the facsimile storage/exchange unit h1 is down and take countermeasures from the control center. There was a roll that could not be taken. In particular, failure of the facsimile storage and forwarding device l due to a failure due to a power outage, hardware failure, software failure, etc. is not separated from other failures such as failures due to deterioration in the quality of the communication line. The drawback was that it was unclear whether or not the manuscript should be resent.

Furthermore, as can be seen from the flowchart in Figure 2, when the image signal for the original is correctly received, the external storage device, which has a relatively slow access time, is accessed and a key is created to send it to the receiving terminal. Therefore, it took a long time to send the communication result data to the sending terminal. As a result, ``the sending terminal was not in a waiting state, and the line remained connected for a long time, resulting in high communication costs. On the other hand, in a facsimile storage and forwarding device with many facsimile lines, the CPU must access the external storage for creating keys while the sending terminal is connected to each line, which increases the load on the CPU. As the number of terminals increases, the waiting time of each transmitting terminal also increases, resulting in an increase in communication costs.

[Purpose of the invention]

The present invention was devised in view of the drawbacks of the conventional facsimile storage and forwarding device described above, and its purpose is to facilitate the communication processing of documents that could not be received correctly due to failures such as power outages in the facsimile storage and forwarding device. It is an object of the present invention to provide a facsimile storage and forwarding device that can be operated efficiently.

[Summary of the invention]

Therefore, in the present invention, the facsimile signal transmitted from the transmitting terminal is received and stored, and the ID data of the transmitting terminal is confirmed by the facsimile storage and forwarding device that transmits the stored facsimile signal to the receiving terminal, and then the facsimile signal is transmitted to the facsimile storage and forwarding device. A retransmission message creation means that creates retransmission request message data for the terminal, and when the facsimile signal sent from the sending terminal cannot be received correctly due to a failure of the own device, the retransmission message creation means is created when starting up the own device. The retransmission request message data created by the means is sent to the above-mentioned sending terminal, and when the facsimile signal sent from the above-mentioned sending terminal can be received to the end without any failure of the own device, the communication result data is sent to the above-mentioned sending terminal first. and processing means for creating a queue for transmitting the received facsimile signal after transmitting the facsimile signal and erasing the retransmission request message data in the retransmission message creation means, the facsimile accumulator exchange device is equipped with The above objective has been achieved.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 3 is a block diagram of one embodiment of the present invention.

In this figure, the components denoted by the same reference numerals as in FIG. 1 are the same components as in FIG. 1. In this embodiment, a management external storage device 9 is connected to the CPU 7 in the facsimile storage/exchange device M, 1o. The CPU 7 accesses the management external storage device 9 and creates a key for transmission to the receiving terminal.

Here, the image signals sent from the terminals 2021 to 24 are
The facsimile storage and forwarding device 10 is reached via the public communication network 3 and the exchange 4. The communication control device 5 in the facsimile storage and forwarding device 10 transmits
i, demodulates the image signal, performs redundancy suppression decoding, and writes the decoded image signal to the image storage device 6.

The CPU 7 controls the communication control device 5 based on the control program in the core memory 8, and also controls the image storage device 6.
I created a retransmission request message data within the day, and it disappeared,
A transmission queue is created in the management external storage device 9.

The image signal stored in the image storage device 6 is sent to the called terminals 2021 to 2024 by the communication control device 5 executing a transmission control procedure under the control of the CPU 7. That is, the image signal is read from the communication control rack ff15Fi and the image storage device 6, redundancy suppressed coded, modulated, and transmitted to the terminals 202 to 24 via the exchange 4 and the public communication network 3.

In such a facsimile storage and forwarding device 10, C
The PU 7 operates as a functional unit as shown in FIG. 4 based on the control program. In the figure, 21 indicates a retransmission message creation means. When the retransmission message creation means 21 receives the ID data n of the sending terminal, it creates and outputs the retransmission request message data 23 in a predetermined format. Further, the retransmission message creating means 21 outputs the retransmission request message data 23 only when it receives a sending command signal 26 from the unreceivable cause identifying means 6 in the processing means described later. Further, upon receiving a final manuscript reception signal 31 from final manuscript determination means 30, which will be described later, the created retransmission request message data is deleted.

Sae is a processing means, and when the image signal sent from the transmitting terminal cannot be received correctly due to the failure of the own device, it sends a retransmission request created by the retransmission message creation means 21 when starting up the own device. Telegram data is sent to the above-mentioned sending terminal, and if the image signal sent from the sending terminal can be received to the end without the own device going down, the received image signal is sent after sending the communication result data to the sending terminal first. It creates a queue for sending a signal and also erases the retransmission request message data in the 1 retransmission message creation means 21. Specifically, the regular reception determining means 27, the communication result data creating means 28, the final manuscript determining means 30. It consists of unreceivable cause identification means 25 and key creation means 32.

The regular reception determining means 27 monitors the reception state of the image signal silver, determines whether there is any abnormality in the line, for example, and outputs data as a result. The result data 33 is received by the communication result data creation means 28, and based on the result data 33, the communication result data creation means 28I'i creates data communication result data indicating that the image signal was correctly received or not correctly received. Output U-.

The final document determining means (capital) sends a signal indicating that there is no image signal for the document to be sent continuously sent from the sending terminal.
For example, by detecting the EOP signal -, the final original reception signal 31
Output. This final manuscript reception signal 31 is given to the retransmission message generating means 21 and the key generating means 32. Accordingly, the retransmission message creation means 21 erases the retransmission request message data, and the queue creation means 32 accesses the management external storage device 9 to create a queue for transmitting the received image signal. In addition, the unreceivable cause identification means 5 detects failures due to power outage, hardware failures, software failures, failure of the facsimile storage/exchange unit 10, etc.
Thereafter, the voltage 35 of the power supply that is turned on when restarted is inputted, detected, and outputted as a sending command signal 26 to the retransmission message creation means 21.

The operation of the CPU 7 as a functional unit as explained above will be explained based on the flowchart of FIG.

First, in step 101, the CPU 7 determines whether or not there is an incoming call from a certain terminal via the communication control device 5. When the process branches to YES, the CPU 7 proceeds to step 102 and determines whether or not the ID of the partner terminal has been recognized. That is, the communication control device 5 confirms the ID data of the other party's terminal using the DC8 signal and the NSS signal, which are control signals for the transmission control procedure. The CPU 7 receives ID data from the communication system (Ell device 5) and branches to YES. Next, the CPU 7 proceeds to step 103 and receives the ID data from the communication control device 5.
Based on the ID data received from the image storage device 6, retransmission request message data is created in the image storage device 6. In Figure 4,
After receiving the data 22, the retransmission message creation means 21 creates retransmission request message data in a predetermined format. Next, the CPU 7 proceeds to step 104 and determines whether both signals for each document have been correctly received.

In FIG. 4, the regular reception determining means 27 monitors the reception status of the image signal 29, and if there is no line abnormality and image signals for one document can be received, the communication result data indicates that If there is a line abnormality, etc., a message indicating that the communication could not be received correctly is outputted to the communication result data creation means 28 as result data.

Next, the CPU 7 controls the communication control device 5 to send back a message to that effect in step 105 when the communication is correctly received. In this case, the MCF signal is sent to the transmitting terminal. In addition, if reception is not possible correctly, the CPU 7
The communication control device 5 is controlled to send back a message to that effect in step 106. In this case, the sending terminal has, for example,
RTN signals, PIN signals, etc. are sent out. In Figure 4,
The communication result data creator R28 is the normal reception determining means 27.
Based on the result data 33 output from , a communication result data tool is sent out. Upon receiving this communication result data 34, the communication control device 5 inputs the MCF signal, the TN signal, and the PIN.
Send signals etc.

Next, in step 107, the CPU 7 determines whether or not there is an image signal for the document to be continuously fed. If there is, the CPU 7 returns to step 104 and continues the following operations. If there is no document to be continuously fed, the process advances to step 108. In FIG. 4, if the final document determining means 30 does not detect the EO'P signal, the receiving operation continues and the EOP signal is not detected.
When the signal is detected, a final document reception signal 31 is output.

In step 108, the CPU 7 accesses the management external storage device 9 to create a key for transmitting the received image signal, and also accesses the image storage device 6 to create a key for transmitting the received image signal. Delete the Go send request message data. In FIG. 4, the final document reception signal 31 is given to the key creation means 32, and the queue creation means 32 creates a queue. The retransmission message creation means 21 receives the final manuscript reception signal 31
is received, and the retransmitted message data is deleted.

By the way, during the reception of image signals, failures due to power failure of the facsimile storage and forwarding device 10, software failures, 8-r
Assume that a software failure occurs and the facsimile storage and forwarding device IO goes down. After that, it is restored and when the power is turned on,
The unreceivable cause identifying means 2!5 receives the electricity E35 from the power source and outputs a sending command signal 26. Sending command signal 26
The retransmission message creation means 21 that received the retransmission message data 23 outputs the retransmission request message data 23. In other words, the CPU that detected the power cycle
7 accesses the image storage device 6, and if there is retransmission request n sentence data, sends it to the sending terminal via the communication control device 5.

As a result, the transmitting terminal records and outputs 13 journal records using MCF signals, RTN signals, PIN signals, etc., or a retransmission request message. Based on this, the operator of the transmitting terminal can reset the document that needs to be retransmitted into the transmitting terminal and send it to the facsimile storage/exchange device [10].

In this embodiment, the image storage device 6 and the management external storage device 9 are separate devices, but they may be the same device.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to quickly and accurately request retransmission of an image signal for a document that was being received at the time of a failure due to a power cut or the like in the facsimile storage and forwarding device. Therefore, there is no need to erroneously retransmit documents twice as in the conventional case, and it is possible to reduce the number of steps needed to find a document to be retransmitted.

Further, since a retransmission request is made in distinction from cases such as line abnormalities, more accurate responses can be taken on the sending terminal side.

Furthermore, after the image signals for continuously fed originals are no longer transmitted, a key is created for sending out the received image signal, so the CPU is not required to create a key as in the past. The sending terminal is no longer forced to wait while accessing the external storage sound. That is, the sending terminal is
After receiving the final communication result data, no waiting time is required until the line is disconnected, and therefore communication costs can be reduced. Additionally, facsimile storage and forwarding devices do not require keys to be created while the line is connected.
Lines can be used effectively, and an efficient facsimile storage and forwarding device can be provided in this respect.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional example, FIG. 2 is a flowchart for explaining the operation of the conventional facsimile storage and forwarding device shown in FIG. 1, and FIG. 13 is an embodiment of the present invention. 4 is a block diagram of the main part of the present invention,
FIG. 5 is a flowchart for explaining the operation of the facsimile storage and forwarding apparatus of the embodiment shown in FIG. 3. 21...Retransmission message creation means S...Processing means δ...
・Means for identifying causes of unreceivable reception 27... Means for determining regular reception Column: Means for creating communication result data 30... Means for determining final manuscript Next... Means for creating queue Patent attorney Nori Chika Yu (and 1 other person) )

Claims (1)

[Scope of Claims] α) In a facsimile storage and forwarding device that receives and stores facsimile signals transmitted from a transmitting terminal and transmits the stored facsimile signals to a receiving terminal, ID data of the transmitting terminal is checked. a retransmission message creation means for creating a retransmission request message data for the sending terminal after the sending terminal; The retransmission request message data created by the retransmission message creating means is sent to the Ei terminal. and processing means for creating a queue for transmitting the received facsimile signal after transmitting the communication result data to the transmitting terminal, and for erasing the retransmission request message data in the retransmission message creation means. A facsimile storage and forwarding device characterized by: (2) The processing means detects whether the facsimile signal cannot be received due to a hardware failure, software failure, or failure due to a power outage of the own device, and whether the facsimile signal cannot be received due to other causes. It has means for identifying the cause of unreceivable reception,
Only when the unreceivable cause identifying means identifies that the facsimile signal cannot be received due to a hardware failure, software failure, or failure due to a power outage of the own device,
The facsimile storage and forwarding device according to claim 1, wherein the facsimile storage and forwarding device transmits the retransmission request message data created by the retransmission message creation means.