JPS59125172A - Communication system of facsimile retransmission - Google Patents

Abstract

PURPOSE:To avoid the useless retransmissions given from a transmitter side and to prevent the useless erasion of a stored data by having polling at the receiver side after the trouble of a receiver is restored in case a circuit is disconnected during transmission owing to said trouble. CONSTITUTION:The picture signal sent from a transmitter A is received at the automatic transmission/reception network control part 7 of a receiver B and demodulated at a modulating/demodulating part 4B. This demodulated signal is expanded to its original redundancy through a decoding part 8 and displayed at a writing part 9. When a receiver B is interrupted with a circuit error, a main control part 6B checks the stored reception trouble signal and transmits the stored terminal number of the transmitter to the part 7. Then an indication is given for automatic transmission. At the same time, the part 6B waits for the information of reception of the receivable mode signal sent from a communication control part 3B and gives an indication of polling to the part 3B when said information is given. With this polling indication, the part 3B transmits the polling signal to the transmitter A to perform the normal communication.

Description

TECHNICAL FIELD The present invention relates to a facsimile retransmission communication system, and more particularly to a facsimile retransmission communication system when trouble occurs in a receiver.

Conventional technology In a facsimile machine with an automatic dialing function, when the line is cut off during transmission due to a transmission error (for example, a line failure, a jam, a receiver trouble such as running out of recording paper), the transmitter side conventionally makes a re-transmission. , efforts are being made to reconnect the line. If the cause of the 7-ail is a faulty line, it makes sense to re-transmit, but if there is a problem with the receiver, it is wasteful to repeat the re-transmission over and over again when there is no way of knowing when the receiver will be fixed.

In a facsimile transmitter equipped with a storage/reproduction device, if a number of transmission failures occur, the transmission will no longer be performed as a non-delivery transmission. However, when there is a problem such as a jam, it may take some time to recover, and when a call comes in during repairs, the caller is a machine, so there is the inconvenience of having to hang up the phone immediately. be.

Further, in the case where the storage/reproduction device is small-scale, the data of the document processed as a non-delivery transmission is designed so that the management data remains but the data in the storage section is lost. Therefore, when the receiver trouble recovers after transmission is stopped due to non-delivery transmission, the stored data has already been erased and the document must be set in the scanner again.

Purpose The purpose of the present invention is to eliminate the above-mentioned conventional drawbacks, eliminate the waste of retransmitting from the transmitter side many times when the line is cut off during transmission due to trouble with the receiver, and eliminate the loss of stored data. An object of the present invention is to provide a facsimile retransmission communication system that can prevent meaningful loss.

Configuration The configuration and operation of an embodiment of the present invention will be described below. .

FIG. 1 is a schematic diagram of the configuration of a transmitter and a receiver of a facsimile machine in an embodiment of the present invention.

Block A shows the transmitter 41TX, and block B shows the receiver RX. Reference numeral 1 denotes a reading section which scans and reads a set original document and converts it into an electrical signal as an image signal. A compression coding unit (COD) 2 compresses the redundancy of the image information from the reading unit (SCAN) l. Main control unit (μCPU) 6
Communication control unit (CCU) 3A receives the transmission command from A.
The image signal compressed by the compression coding unit (COD) 2 is
The modulator/demodulator (MOD) 4A is instructed to perform modulation to match the communication @line (LINE) 10. Network control unit (NC
U) 5 transmits the modulated image signal to the communication line (LINE)
10 to the target receiver (RX) H. A main control unit (μCPU) 6 controls the overall operation of the receiver (TX) A.

The image signal sent from the transmitter (TX) A is sent to the receiver (R
It is received by the automatic originating and terminating network control unit (AANCU) 7 of the PLOT)9. Main control unit (μCPU
) 6B controls these operations and also controls the communication control operation of the communication control unit (CCU) 3B.

Hereinafter, with reference to the flowchart shown in FIG. 2, the response to a transmission failure will be explained in detail.

First, the transmitter (TX) A sends the original to the reading unit (SCAN).
1, dial the destination terminal number, and call the receiving side (201A). When the destination receiver (RX) B is called, it calls the automatic originating and terminating network controller (AANC).
U) 7 detects the call and the main side? n1lS (μCP
U>613 Hem'A1-4-ru (201 B).

The main control unit (μCPU) 6B is the communication control unit (CCU) 3
The transmitter ('rX
)A to send the communication control unit (CCU) 3B.
generates a signal frame and transmits it through a modulation/demodulation unit (MOD) 413 (202B).

Transmitter (TX) A is DIS at communication control unit (CCU) 3A
When the signal is received (202A), the transmitter terminal number signal (S'SI) and the transmission mode signal (Dcs) are sent to the receiver (202A).
RX)H (203A).

Receiver (RX) B receives the transmitter terminal number signal (SS) and the transmission mode signal (DC8) (203B).
), the transmitter terminal number is memorized until normal communication is completed. Furthermore, V is added to the receive mode by the transmit mode signal (DC8), and the receive ready signal (CFR) is sent to the transmitter (T
X) Send to A (204 B). Note that in a normal receiver, the contents of the sender terminal number signal (SSI) are displayed on the display.

Transmitter (TX:) A sends reception ready signal (C1”R)
When the code is received, the reading section (SCAN) 1 is started to read, and the compression code section (COD) 2,
j:11 The data transmission start is also applied to the communication control unit (CCU) 3A (205A, 206A). Receiver (RX) B
After entering data reception (205B), the main control unit (
The communication controller ( CCU) 3B continue monitoring until notified (206 B). In this monitoring, reception troubles such as line error signals, jam signals, or recording paper out signals are detected by the main control unit (μCPU)
When B is notified, the reception trouble interruption signal is memorized, and transmitter (TX) A receives the interruption signal (PIN).
Sends and opens line 10 (207B
, 208B).

When the transmitter (TX) No. A receives the interrupt signal (1) IN), it releases the line CL I NE) and O, and releases the page of the manuscript in the gap in which the interrupt signal (P i N) is received. including
Reset the subsequent pages to the reading section (S('AN)).
(207A, 208A, 209A). If the transmitter (TX) A has a storage/playback device (SAF), the original must be reset. At times, a retransmission page may be designated to the storage/reproduction device W (SAF).

When the receiver (RX) B is interrupted due to a line error, the main control unit (μCPU) 6B
checks whether a reception trouble interruption signal is stored, and if it is stored, it transmits the previously stored transmitter terminal number to the automatic arrival/arrival network control unit (AANCU) 7, and gives an instruction to make a self-III call. Vending 1 call/termination network control unit (AANCU)
) 7 closes the communication line (LINE) 10 and automatically dials the designated transmitter terminal number (209B, 210
B.

211B). The main control unit (ttCPU) 6B receives a reception enable mode signal (DIS) from the transmission control unit (CCU) 311.
) (21, 2B), and when the notification is received, a polling instruction is given to the communication control ff1S (CCU) 3T3. This polling instruction causes the communication control unit (C
C'U) 3B is the called terminal, i.e. transmitter (TX) A
Sends a polling signal (DTC) to
, (13)).

When the main control unit (μcPU) 6A of the transmitter m (TX) h receives the paging signal reception notification from the network control unit (NCU) 5, it sends the communication control unit m (LINE) 1 to the network control unit (NCU) 5.
0, and the communication control unit (CCU) 3
A is given an instruction to send a receivable mode signal (DIS), and after the communication control unit (CCU) 3A sends a receivable mode signal (DIS) according to the instruction, the calling side, that is, the receiving fence (RX) Wait for next signal from B (21OA
.

211A). When the main control unit (μCPU) 6A receives a signal from the reception ff (RX)B indicating that the transmission mode signal (DO8) has been received from the communication control unit (CCU) 3A, the main control unit (μCPU) 6A is in the normal reception mode ( 2) Start the next operation,
If the polling signal (DTC) is received, the main control unit (μCPU) 6A will be ashamed that a document has been set, and will go into superstition mode for the control unit (CCU) 3A. (212A). In response to this instruction, the communication control unit (CCU) 3A changes to the transmission mode and is in the general text transmission mode (begins the operation after Q. The transmission 4 (fi (TX) If the transmission is successful, receive the end signal (EOP) and send 4fA (I
IX) Send to B (213A,).

Reception Cedar; 9, (RX) B receives the end of lease (EOP), and if the document reception is also normal, it sends a normal reception confirmation signal (
MCF) is sent to the transmitter (TX) A, and the communication system N (L
I N'E) 10 t-open t15 (206B.

214B).

When the transmitter (TX) A receives a normal reception confirmation signal (MCF) from the receiver (RX) B, the transmitter (TX) A connects the communication line (LIN).
E) Release 10 and end (214A).

In other words, as a result, after the receiver i (RX)B receives the transmitter terminal No. 119 signal (SSI), a transmission failure occurs, and when the trouble at the receiver i (RX)B is resolved, all originals are sent. It means that it was done.

In addition, when the transmitter ('rX) A has a storage/reproduction device n, after the transmitter (TX) A receives the receivable mode signal (DIS) from the receiver m (RX) B, the transmitter terminal number is When sending the signal (SSI) and the transmission mode signal (DC8) to the receiver (RX) 13, the SSI signal or D
If you include a serial number for each communication unit in the O3 signal, even if a reception problem occurs when sending to a terminal, the receiver (
By attaching a serial number and polling from the RX) B side, the original document can be transmitted without error. Furthermore,
Since there is no need to retransmit the transmission many times, the transmitted document will not be treated as an undelivered document, and therefore the stored data will not be erased.

Effects As explained above, according to the present invention, when the line is cut off during transmission due to trouble with the receiver, the receiver can recover the trouble and perform polling from the receiver side, thereby preventing the transmitter from receiving the signal. This eliminates the waste of retransmitting data over and over again, and prevents the meaningless deletion of stored data.

[Brief explanation of drawings]

FIG. 1 is a diagram schematically showing the construction of a transmitting board and a receiver of a facsimile sub-device according to an embodiment of the present invention, and FIG.
FIG. 1 is a diagram illustrating the operation flow of the transmitter and receiver shown in FIG. 1. 1: t゛-containment section 5CAN, 2: compression code section COD. 3A, 3B: Communication control unit CCU, 4A, 4B: Modulation/demodulation unit M OD, 5: ilJ mJ control unit NCU
, 6A, 6B: Main control unit μCPU, 7: Automatic call origination/reception group control unit AAN'CU. 8: Decoding unit DEC, 9: Storing unit PLOT, 10:
Communication line, A: transmitter of facsimile machine, B: receiver of facsimile machine'.

Claims (1)

[Claims] In a facsimile communication system in which document data is sent and received between multiple facsimile machines, a circuit is provided to send a transmitter terminal number to the transmitter of the facsimile machine, and transmission is automatically performed in response to a transmission request from the other party's facsimile IJ device. The receiver of the facsimile machine is equipped with a circuit for storing the transmitter terminal number, and a circuit for automatically dialing the transmitter terminal number to the transmitter of the facsimile machine. , when communication fails after the receiver receives the transmitter terminal number from the transmitter, the receiver automatically transmits the transmitter terminal number to the transmitter after the receiver recovers normally. A facsimile retransmission communication system characterized in that the transmitter performs polling transmission of remaining document data.