JPS63211939A - Facsimile store and forward exchange system - Google Patents

Abstract

PURPOSE:To attain smooth operation of a system by adding information of the reason of intermission into a control signal and sending the result when the reason intermitting facsimile communication takes place and informing it to a facsimile terminal equipment. CONSTITUTION:A store and forward exchange 1 is called from a sender FAX terminal equipment. When an address of a disk memory 11 is designated by secondary address information to store a communication text from the FAX terminal equipment. When the secondary address information is inadequate, the reason is informed to the FAX terminal equipment to disconnect the line. In extracting the stored information of the store and forward equipment from the sender FAX terminal equipment 2a by polling, when the content of a designated pass word is inadequate, the reason of intermission of facsimile communication is informed to the FAX terminal equipment 2a and the communication is intermitted. When the stored capacity of the disk memory 11 is occupied on the way of reception, the reason of intermission representing it is informed to the FAX terminal equipment 2a and the communication is intermitted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a facsimile storage and forwarding system comprising a storage and forwarding device and a plurality of facsimile terminals.

(Prior art) A facsimile storage and forwarding system that temporarily stores facsimile signals received from a facsimile terminal in a storage unit in a storage and forwarding device and then transmits them to other facsimile terminals utilizes time slots when line usage is relatively low. By receiving facsimile signals using Fe, peak loads can be smoothed out, and processing such as code exchange can be easily performed within the storage and forwarding device. It is attracting attention as a means of information communication.

(Problem to be Solved by the Invention) By the way, in a facsimile terminal in this type of system, if facsimile communication is interrupted due to its own causes such as running out of paper, the reason is notified through the display on the operation unit or the printing mechanism. It has a function.

However, if communication is interrupted due to a reason on the storage/forwarding device side, the reason for the interruption is not sent, so it has to be treated as a normal communication error, and invalid actions such as repeatedly calling the storage/forwarding device are required. There was a problem in that a situation occurred in which repeated communications occurred, making it impossible for the system to operate smoothly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a facsimile storage and exchange system that enables smooth system operation.

[Configuration of the Invention (Means for Solving the Problems)] The present invention provides for a storage/forwarding device, when facsimile communication is interrupted due to a cause within the device itself, to add the reason for the interruption to a control signal and to transmit the reason for the interruption during communication. A means for transmitting data to a facsimile terminal is provided, and the transmitted reason for interruption is displayed on a display means of the facsimile terminal.

(Operation) For example, when the storage capacity of the storage and forwarding device 8W1 becomes full, the storage and forwarding device adds information indicating this to a control signal to the facsimile terminal and transmits it. As a result, a display indicating that the storage capacity is full is displayed on the facsimile terminal side. Therefore, the operator on the facsimile terminal side performs the retransmission operation after waiting for the reason to be cleared, and it is possible to suppress unnecessary repetition of the retransmission operation.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of the present invention.
One accumulation exchange jI! Device 1 and multiple facsimile terminals (F
AX>2a to 2n, and these are connected by a general public line network 3.

The storage and forwarding device 1 includes a central processing unit (CPU) 10, a disk memory 11 for storing facsimile signals, and a communication control unit (CCE) 12.

First, the communication forms in this configuration can be roughly divided into the following three types.
That's right.

(1) Receiving a call...Accumulation exchange from a FAX terminal
A call is made to the k device 1 and a message is sent from the FAX terminal to the storage and forwarding device 1.

(2) Called transmission: The FAX terminal makes a call to the storage and forwarding device et1, and the message is transmitted from the storage and forwarding device 1 to the FAX terminal.

(3) Receiving serial messages: Sends multiple messages from the FAX terminal to the storage/exchange device [1].

(4) Stream transmission...from storage/exchange device et1 to FA
Send multiple messages to X terminal.

FIG. 2 shows the CP of the storage and forwarding device 1 in the above communication mode.
It is a flowchart showing an outline of operations performed by U10. Also, Fig. 3 shows called reception, Fig. 4 shows called transmission, and Fig. 5 shows called reception.
The figure is a sequence diagram showing the control procedure in the case of serial reception, and FIG. 6 is the control procedure in the case of serial transmission.

Hereinafter, the operation of the embodiment will be explained for each communication type with reference to FIGS. 2 to 6.

(1) Operation when receiving a call When receiving a call, the procedure shown in FIG. 3 is executed. In this procedure, the sender's FAX terminal makes a call to the storage and forwarding device 1, and the address of the disk memory 11 is specified using the secondary address information to store the message from the FAX terminal. If the secondary address information is invalid during the procedure, the reason is notified to the FAX terminal side.

First, the telephone number of the line to which the communication control device 12 of the storage and forwarding device 1 is connected from the FAX terminal 2a via the network 3
(station number) and call the line. by this,
If the line is connected, the communication control device 12 responds to the incoming call C.
The caller's FAX terminal 2a and the CPU 10 are notified of I. Then, the CPtJ 10 transmits the initial identification command in the format shown in FIG.
is sent to the FAX terminal 2a via the fax terminal 2a. On the other hand, F.A.
X terminal 2a transmits facsimile signals, so
A transmission request command in the format shown in FIG. 3(C) is transmitted to the CPU 10 via the communication control device 12. CPU
In step 10, the secondary address information for the disk memory 11 set in the NSS signal of the first frame in the received transmission request command is analyzed to determine its validity. As a result, if the secondary address information is correct, a reception ready signal CFR is sent to the FAX terminal 2a,
The facsimile image signal PIX is transmitted from the FAX terminal 2a and stored in the disk memory 11 in sequence. On the other hand, if the secondary address information is invalid, an initial identification command in the format shown in FIG. 7(a) is sent to the FAX terminal 2a. At this time, the CPU 10 outputs the NSF signal (non-standard function identification signal) of the first frame of the initial identification command.
The message is sent with information indicating that the secondary address information is invalid as the reason for interrupting the facsimile communication.

Therefore, the FAX that received such an initial identification command
The asthmatic terminal transmits a disconnection command signal DCN to the communication control device 12 to disconnect the line. At the same time, the reason for the interruption is displayed on the display of the operation unit. The above operation is step 20 in Figure 2.
~26.

In addition, in the format of each command shown in FIGS. 7(a) to (C), F is a flag sequence, A is an address field, C is a control field, Fe2 is a frame check sequence, NSF is a non-standard function identification signal, NSC is a non-standard function identification signal, NSS is a non-4! !
Semi-enabled setting signal, DNS is digital identification signal, DTC
is a digital transmission command signal, DO8 is a digital command signal, TSI is a transmission terminal identification signal, and CIG is an optical call terminal identification signal, all of which are defined in the HLDC procedure recommended by CCITT.

(2) Operation during call transmission This procedure is to retrieve the stored information of the storage and forwarding device 1 from the originating FAX terminal 2a by polling, and if the password specified therein is invalid, the facsimile transmission is The reason for the interruption is notified to the FAX terminal 2a, and communication between the storage and forwarding device 1 and the FAX terminal 2a is interrupted.

First, as in the case of receiving a call, the communication control B11 device 1 of the storage and forwarding device 1 is transmitted from the FAX terminal 2a via the line network 3.
Call the telephone number W (station number) of the line to which No. 2 is connected, and call the line. As a result, if the line is connected, the communication control device 12 sends the incoming call response CI to the FAX of the caller.
The terminal 2a and CPU 10 are notified. Then, the CPU
10 transmits an initial identification command in the format shown in FIG. 7(a) to the FAX terminal 2a via the communication control device 12. On the other hand, in order to receive facsimile signals, the FAX terminal 2a sends a reception request command in the format shown in FIG. rcP
Transmit to U10-1, cPUlo analyzes the password set in the NSC signal of the first frame in the received reception request command and determines its validity. As a result, if the password is correct, a transmission request command is sent to the FAX terminal 2a, and after confirming that the reception preparation completion signal CFR is returned from the FAX terminal 2a, the facsimile image signal PIX is transmitted. . On the other hand, if the password is invalid, the initial identification command in the format shown in FIG. 7 (a>) is sent to the FAX terminal 2a. (Non-standard function identification signal) is sent with information indicating that the password is invalid as the reason for interrupting 7 axis communication.Then, the FAX terminal 2a that receives such an initial identification command disconnects. Send the command signal DCN to the communication tip device 12,
disconnect the line. At the same time, the reason for the interruption is displayed on the display of the operation unit. The above operation is performed in steps 20 to 2 in Figure 2.
1.29-31.

(3) Operation when receiving a series of messages This procedure is performed when the storage/forwarding device 1 receives a message over multiple pages.
This is received from the AX terminal 2a, and if the storage capacity of the disk memory 11 becomes full during reception, the reason for the interruption is notified to the fax terminal 2a, and the storage/exchange device 1
Communication between the FAX terminal 2a and the FAX terminal 2a is interrupted.

First, after connecting the line between the storage and forwarding device 1 and the FAX terminal 2a using the same procedure as in the case of receiving a call, a predetermined facsimile procedure is executed to transmit a facsimile image signal from the FAX terminal 2a. The facsimile image signals are sequentially stored in the disk memory 11, but the CPU 10 checks the remaining storage capacity Q of the disk memory 11 every time one image signal is stored. As a result, if the remaining number is sufficient, the reception operation will continue, but if the remaining number is less than one sheet, the 7th reception will continue.
The initial identification command shown in Figure (a) is transmitted. At this time,
The CPU 10 reads the NSF of the first frame of the initial identification command.
The @ number is sent with information indicating that the storage capacity is full as the reason for interrupting facsimile communication. Therefore, the FAX terminal 2a that has received such an initial identification command transmits a disconnection command signal DCN to the communication system tII] device 12 to disconnect the line. At the same time, the reason for the interruption is displayed on the display of the operation unit. The operations in this case correspond to steps 20-23 and 25-28 in FIG.

(4) Operation when transmitting a series message This procedure is performed when the N-branch switching device 1
If the current communication is to be sent to the AX terminal 2a and it becomes necessary to interrupt the current communication in order to give priority to another message during transmission, the reason for the interruption will be sent to the AX terminal 2a. Ru.

First, the line to which the FAX terminal 2a is connected is called via the line network 3, and once the line is connected, a predetermined facsimile procedure is executed to send a facsimile image from the storage and forwarding device 1 to the FAX terminal 2a. Send signal PIX.

Each time the CPU 10 transmits an image signal for one image, it checks whether there is a priority message, and if there is no priority message, it continues the serial transmission operation. However, if there is a priority message, the initial identification command shown in FIG. 7(a) is transmitted. At this time, C
PU 10 is the N of the first frame in the initial identification command.
The SF signal is sent with information indicating that there is a priority message as the reason for interrupting facsimile communication. Upon receiving such an initial identification command, the FAX terminal 2a transmits a line disconnection request DCN and disconnects the line with the storage and forwarding device 1. At the same time, the reason for the interruption is displayed on the display of the operation unit.

The operations in this case are steps 20 to 23.29 in FIG.
- Applicable to 33.

Note that the reason for interruption is not limited to what is displayed on the display, but may be printed in a separate print column or the like.

[Effect of the Invention 1] As explained above, in the present invention, when a reason for interrupting facsimile communication occurs on the storage and forwarding device side, information on the reason for the interrupt is added to the control signal and transmitted, and Since the terminal side notifies the reason for the interruption, the facsimile terminal side can easily know the reason why the facsimile communication has been interrupted. Therefore, unnecessary retransmission operations or re-reception operations are eliminated, and the system can be operated smoothly.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flowchart showing an outline of the operation of the embodiment, FIGS. 3 to 6 are sequence diagrams showing control procedures for each communication form, and FIG.
The figure is a format diagram showing commands sent and received between the storage and forwarding device and the facsimile terminal. DESCRIPTION OF SYMBOLS 1... Store and exchange i location, 2a, 2n... Facsimile terminal, 3... Public line network, 10... Central processing unit, 11... Disk memory, 12... Communication control device. Figure 1 ((1) Initial Sono d Recommand F (b) Kai Kan request command F

Claims (1)

[Claims] In a facsimile store-and-forward system that includes a plurality of facsimile terminals and a store-and-forward device that stores facsimile signals from each facsimile terminal and transmits the stored facsimile signals in response to a request from the facsimile terminals, When facsimile communication is interrupted due to a cause within the own device, means is provided for adding the reason for the interruption to a control signal and transmitting it to the facsimile terminal that is communicating, and displays the transmitted reason for interruption on the display means of the facsimile terminal. A facsimile storage and exchange system characterized by displaying.