JPS61224775A - Facsimile transmission equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] A method for retransmitting a page with many errors, in which a determining unit determines whether or not a notification signal for a page with many errors from the receiving side is stored, and if it is stored, an end signal is sent. By transmitting and retransmitting a signal notifying a processing mode change without transmitting a signal, it becomes possible to continue retransmission without disconnecting the line.

[Industrial application field]

The present invention relates to the retransmission of error-prone pages by a facsimile (hereinafter referred to as FAX) transmitting device, and particularly relates to a FAX transmitter that can retransmit error-prone pages without disconnecting the line after the last page has been transmitted. It is.

2. Description of the Related Art In recent years, FAX communication, which uses communication lines to transmit documents, figures, etc. to remote locations, has become popular. FAX communication is usually a communication between users by connecting transmitting and receiving devices via a communication line such as a subscriber telephone line via a switchboard, and transmits the scanned image data of the original document on the sender's side as an electrical signal. The document is then recorded on recording paper and reproduced.

If errors occur frequently on the receiving side during transmission, a notification signal is sent and stored on the sending side, and the relevant page is retransmitted after transmission, but since the line is disconnected and then retransmitted, it costs time and charges. A method to reduce waste is desired.

[Conventional technology]

FIG. 4 shows a block diagram of the FAX communication device.

In the figure, a reading unit 2 has a function of reading a document 1 with an image sensor (not shown) and converting it into image data.

The main control unit 3 performs sequence control of transmission and reception, and has the function of converting the image data sent from the reading unit 2 into binary values, compressing it, and transmitting it, and decompressing the received image data and sending it to the recording unit 6. It also includes a transmitting section 31a that holds various transmission signals from pre-procedure communication to the end of transmission and selects and transmits them based on commands. In addition, when there are many errors in the received data, a function to send a barrel transmission instruction signal (hereinafter referred to as RTN) to the sending side for each page where errors occur frequently, and a function to send a return negative (hereinafter referred to as RTN) to the sending side, and to store error page information in the error page storage unit 5a. After transmitting the RTN and EOP, the operation display section 4
It has the function of displaying on the display.

The operation display section 4 includes a send button and a receive button (not shown).

It consists of a keyboard with operation buttons for inputting the destination telephone number, transmission time, etc., and a display for displaying input data, alarms, etc.

The error page storage unit 5a stores the RT sent from the receiving side.
N (including page numbers of pages with frequent errors).

The recording unit 6 has a function of printing on recording paper according to the received signal to create a recorded document.

The transmission control unit 7 has a function of controlling transmission and reception of image data.

The modem 8 has a function of modulating and demodulating image data and the like.

Network Control Unit
(hereinafter referred to as NCU) 9 has a function of controlling connection and disconnection of the circuit switching network.

With such a configuration and function, the operator first inputs the destination's telephone number from the operation display section 4, calls the receiving station, establishes the pre-transmission procedure using the signal sent from the transmitting section 31, and then sends the document. 1 in the device and then operate the send button, the document 1 is read by the image sensor, converted to image data, sent to the main control unit 3, binary converted and compressed, and the image data is converted to 1. Each page is modulated by the modem 8 under the control of the transmission control unit 7 and sent to the NC
It is sent out to the line for the receiving station via U9.

At the receiving station (here, the operation of the receiving station will be explained using the receiving function shown in FIG. 4), the received image data is sent to the main controller 3.
The data is expanded and sent to the recording section 6, where it is recorded on recording paper.

When the final page is transmitted, an EOP is transmitted from the transmitter 31a and the line is disconnected.

Transmission and reception are performed in this manner, but if errors occur frequently on the receiving side, a signal notifying an error page is sent to the transmitting side each time, and the page number is stored in the error page storage section 5a. After the transmission is completed, an alarm state occurs on the transmitting side, and the operator is informed by a display of the page that requires retransmission. Alternatively, since a sent stamp is affixed to the original document only when there are no errors, it is also possible to sort this out.

The operator performs the call operation again, connects the line, and retransmits the corresponding page.

[Problem that the invention seeks to solve]

As mentioned above, in the conventional method, after the transmission is completed and the line is disconnected, the transmission is retransmitted again. However, since communication charges are generally based on the basic time/call unit, even if the communication is completed within the basic time, even if retransmission is included, the charge will be doubled. Otherwise, there is a problem that more is required, which is uneconomical.

[Means for solving problems]

FIG. 1 shows a block diagram of the principle of the present invention.

In the figure, 5 is a storage unit that stores the RTN of the error-prone page notified from the receiving side, and 10 is a determination unit that determines whether or not the RTN is stored in the storage unit 5 when the transmission of the final page of manuscript 1 is completed. , 31 is a transmitter that transmits an "end of message (hereinafter referred to as EOM)" in response to a signal indicating that the RTN is stored from the discriminator 10, and transmits an EOP when the RTN is not stored.

Therefore, the configuration is such that a signal in which the determining unit 10 determines that the RTN is stored in the storage unit 5 is sent to the transmitting unit 31a.

[Effect]

When the transmission of the last page of the manuscript is completed, the determining unit 10 determines whether or not the RTN is stored in the storage unit 5. If the RTN is stored, the transmitting unit 31 transmits the ROM and the line is Since retransmission can be performed without disconnecting, time and communication charges can be saved.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. FIG. 2 is a block diagram showing an embodiment according to the present invention, and FIG. 3 is a flowchart of FIG. 2. The same reference numerals indicate the same objects throughout the figures.

In FIG. 2, the main control section 3a has the function of controlling the memory determination section 10a added to the function of the main control section 3 described in the conventional example.

When the transmission of the last page of the manuscript is completed, the memory determination unit 1 (La determines whether or not the error page storage unit 5a has a memory of RTN, and when “yes”, sends a signal a to the transmitting unit 31a. Has a function.

The transmitter 31b has the same function as the transmitter 31a described in the conventional example, and also has a function of transmitting the ROM when the signal a is input from the memory discriminator 10a, and is similar to the transmitter 31 in FIG. corresponds to Also, the error page storage section 5a+
and the memory discriminating unit 10a is the memory unit 5. of FIG. and the determination unit 10.

With such a configuration and function, the method for retransmitting error pages will be explained using the flowchart in Figure 3. ■ The image data of the manuscript editor is sent and sequentially received by the receiving side, and there are pages with many errors. An RTN is transmitted for each page and stored in the error page storage unit 5a on the sending side.

■When the transmission of the last page is completed, the memory determination unit 10a
A signal is sent to the error page storage section 5a, and the storage determination section 10a determines whether or not RTN is stored in the error page storage section 5a.

(2) If the result of the determination is that the storage signal is "present," a signal a is sent to the transmitter 31b. Therefore, the transmitter 31b transmits the ROM to the receiving side.

- When the signal is "absent", a signal is sent to the transmitter 31b.

Therefore, the transmitting unit 31b transmits an EOP to the receiving side, and the communication is terminated and the line is disconnected.

■The receiving side that receives the EOM also sends a function identification signal (D
digitalIdentificationSig
nal: DIS, or Non 5tanda
rd Factlities: N S F ), and sends a transmission start notification signal (Digital
Com-mand Signal or Non
5 standard facilities Step-
UP (hereinafter referred to as DO3 or NSS) enters a waiting state and waits for a predetermined time (approximately 30 to 40 seconds) while holding the line.

(d) During this predetermined period of time, the operator on the sending side learns from the display which pages need to be retransmitted, sends the original to be retransmitted, sends DO3 or NSS, and resumes transmission.

(2) When the retransmission is completed, the transmitting section 31b sends an EOP to the receiving side, and the communication ends and the line is disconnected.

- If there is no operation within this predetermined time, the line is terminated via a line disconnect signal (Disconnect: DCN) and the line is disconnected.

In this way, pages with frequent errors can be retransmitted without disconnecting the line. Moreover, CC
International Telegra
ph and Telephone Con5ultati
Since this does not disturb the procedure determined by the ve Comm1ttee in any way, it can be implemented without making any changes on the receiving device side.

〔Effect of the invention〕

As described above, according to the present invention, retransmission can be performed without disconnecting the line, so the time spent waiting for the receiving side to be busy and the communication charges can be saved.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the principle of the present invention, FIG. 2 is a block diagram showing an embodiment of the present invention, FIG. 3 is a flowchart of FIG. 2, and FIG. 4 is a block diagram illustrating a conventional method. In the figure, 1 is a document, 2 is a reading section, 3.3a is a main control section, 4 is an operation section, 5 is a storage section, 5a is an error page storage section, 6 is a recording section, 7 is a transmission control section, and 8 is a Modem, 9 is NCU. 10 is a discrimination unit; 10a is a memory discrimination unit; 31.
31a and 31b indicate transmitting parts.

Claims (1)

[Scope of Claims] A device that transmits image data read from a manuscript, receives a notification signal from a receiving side when there is a page with many errors during transmission, and stores it, wherein transmission of the last page of the manuscript is completed. It is characterized by comprising a determining section (10) that determines whether or not there is a memory of the notification signal, and when the determining section (10) determines that the memory exists, it transmits a signal informing of a change in processing mode. facsimile transmission device.