KR940005254B1 - Fax control method of image data receiving for computer-fax system - Google Patents

Abstract

The facsimile control method comprises the steps of: transmitting a receiving request signal to a computer when a ring signal is sensed; changing a relay to a facsimile mode when a receiving ready completion signal is received from a computer and receiving a digital command signal of a calling party; receiving a training signal and adjusting a transmission speed; transmitting a receiving mode to the computer; receiving image data when a mode sensing signal is received from the computer, thereby effectively managing received image data.

Description

A facsimile control method for receiving image data in a computer-facsimile connection system

1 is a schematic block diagram of one embodiment of a computer-facsimile connection system to which the present invention is applied.

2 is a flowchart of a main program execution of the present invention.

3A and 3B are an interrupt routine execution flowchart in the present invention.

* Explanation of symbols for main parts of the drawings

10: facsimile device 11: facsimile control unit

12: image scanning unit 13: modem and network control unit

14: serial connection 15: image recording unit

16: RS232C connection 20: Computer

21: computer main control part 22: main memory part

23: hard disk 24: keyboard

25 monitor 26 RS232C connection

30: phone

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of receiving image data in a computer-facsimile connection system, and more particularly to a control method of a facsimile side for sending data transmitted from an external facsimile to a computer connected thereto.

In the present invention, the image data reception means transmitting data received from an external facsimile to a computer in a computer-facsimile connection system.

Conventional facsimile machines include an image scanning unit, an image recording unit, a modem for facsimile communication, and a peripheral circuit thereof to transmit and receive image information. However, the facsimile communication is interrupted when the receiving side facsimile lacks thermal paper or a failure of the image recording unit. The inconvenience was exposed.

In addition, a facsimile equipped with an image scanning unit, an image recording unit, a data storage DRAM, a facsimile communication modem, and a peripheral circuit thereof has a limitation in storing data due to the limitation of the DRAM capacity for data storage within the facsimile. Not only are data lost when POWER OFF, but file management of received data is virtually difficult.

The present invention has been made to solve the above-mentioned problems, and connects a facsimile with a computer (PC) already widely used and transmits image data received from an external facsimile to a computer and stores the image data on a hard disk in the computer. It is an object of the present invention to provide a facsimile-side control method for receiving image data in a computer-facsimile connection system that can effectively use data.

The present invention provides a modem and network control means connected to a public communication network for transmitting and receiving images and an external facsimile, and facsimile control means connected to the modem and the network control means for controlling the input and output of image data, and A facsimile device connected to the facsimile control means and having a serial connection means for connecting to a computer and a first RS232C connection means, a second RS232C connection means for connecting to an external device, and a main memory means composed of a ROM and a RAM. And a computer comprising a hard disk, a keyboard and a monitor as an input / output device, and a computer main control means connected to the second RS232C connection means hard disk keyboard monitor and main memory means to perform overall control. In a facsimile-side control method for receiving image data, a facsimile A first step of transmitting a reception request signal to a computer when a ring signal is detected while a program is running during a standby; When the reception ready signal is received from the computer within a predetermined time period, the relay of the modem and the network control means is switched to the facsimile mode, and the external facsimile is informed of the called party and the specification of the receiver. Receiving a second step; Receiving a training signal to determine whether the line state can accommodate the transmission rate and adjusting the transmission rate appropriately; A fourth step of transmitting a training success signal to an external facsimile and transmitting a reception mode to a computer side according to the setup specification of the calling party; A fifth step of enabling a modem interrupt to receive image data when a mode recognition signal is received from the computer side within a predetermined time; When the reception of one page is completed, it disables the modem interrupt and determines whether there is a next page to receive and receives the next page in the same mode, the next page in another mode, or receives the file end command and sends it to the computer. Sixth step; And a seventh step of transmitting a relay switching signal to an external facsimile and ending the reception mode of setting the relay to the telephone mode.

1 is a schematic block diagram of a hardware configuration of a computer-facsimile connection system to which the present invention is applied. In FIG. 10, a facsimile apparatus, 11 facsimile control unit, 12 image scanning unit, 13 modem and network control unit, 14 is a serial connection, 15 is an image recording unit, 16 is an RS232C connection, 20 is a computer (PC), 21 is a computer main controller, 22 is main memory, 23 is a hard disk, 24 is a keyboard, 25 is a monitor, and 26 is RS232C connection, 20 denotes a telephone, respectively.

As shown in the figure, a PC-FAX system to which the present invention is applied is connected to a public communication network for transmission and reception of an external facsimile, and a modem and a network having a relay for selecting and switching facsimile mode and telephone mode therein. A control unit 13, an image scanning unit 12 for reading an image of a set original, a facsimile control unit 11 connected to the modem, network control unit and image scanning unit to control input / output of image data, and It is configured to connect the facsimile apparatus 10 which is connected to the facsimile control part and which has a serial connection part 14 and RS232C connection part 16 which connects a facsimile with a PC to the PC 20 which is already widely used. The PC is connected to an external device with an RS232C connection section 26, a main memory section 22 composed of ROM and RAM, a hard disk 23 as auxiliary memory, and an input / output device. And a computer main controller 21 which is connected to the RS232C connection unit, the hard disk, the keyboard, the monitor, and the main memory unit to perform overall control. It is preferable to configure a PC of compatible model.

2 is a flowchart of a main program execution of the present invention.

When the facsimile is waiting for a program (41) to be called by an external facsimile and the ring signal is detected (42), the first page flag is set (43), and the receive request signal is sent to the computer 20 side. A time (time 1) is set (44).

It is then determined whether a reception ready signal has been received from the computer side within the set time (time 1) above (47), set the received computer receipt flag (48), and if not received within the set time, receive a known general fax. The operation is performed to record the recording paper of the facsimile (46).

After the computer reception flag set above, the modem and the network control unit 13 switches the facsimile mode to the facsimile mode in which the relay is in the initial telephone mode, and calls a called state identification (CSI) signal with an external facsimile. It transmits a signal (DSI: Digital Indentification Signal) indicating the overall function (specification) of the receiver (50, 51). Then receive a digital command signal (DCS) to receive the source setup data (52), and receive a training signal (53) to determine whether the line condition can accommodate the transmit side rate (53). The result is judged (54), and if the condition is good, a training success signal (CFR: Confirmation to Receive) is transmitted to the external facsimile (55), and the reception mode is transmitted to the computer 20 according to the DCS sent from the transmitting side facsimile. (56), and set a new time (time 2) of the timer (57).

However, if the training signal reception status is not good, check the current reception speed (65), and lower the level by 9600bps, 7200bps, and 4800bps in consideration of the line condition up to the transmission rate of 2400bps (66) and then send the external fax on the external side. A training failure signal (FTT: Failure to Training) is transmitted (67), and the process is repeatedly performed from the process 52 of receiving a DCS from the sending side facsimile. If the training signal reception status is not good even though the speed is lowered to 2400 bps, which is the lowest transmission rate, the relay transfer signal (DCN: Disconnect) is sent to the external transmission side facsimile (72) and the relay is set to the telephone mode (73). The reception flag of the computer is cleared (74) to cause the computer to exit the reception mode and the execution ends.

After setting the time 2 (57), it is confirmed whether a mode recognition signal is received from the computer for a predetermined time (58, 59), and when received, the modem interrupt is enabled (60) to enter the data receiving mode. .

Then, the carrier bit of the modem is checked (61), and if the carrier bit is ON, the data received from the modem interrupt (see FIG. 3a) is lined up because the data is being transmitted. Transfer and store until the buffer is full (62); if the line buffer is full (63), enable the buffer contents transfer interrupt routine (INTTX) to allow data to be transferred to the computer (64) and return to the data receive mode again. After repeating one page data reception and modem modem is off, the modem interrupt is disabled (68), and MPS (Multi-) indicating that the transmitter setup data is the same as the previous page case. Page Signal, End of Message (EOM) indicating that the setup data of the sender is different from the previous page case, and End of Procedure (EOP) signal indicating the end of multi-page transmission. If the above MPS is received, it means that there is a next page to be received in the same mode. Therefore, a message confirmation signal (MCF) indicating that the previous page was well received by an external fax is determined. After transmitting the end of page command to the computer to indicate that the next page is continuous (76), the timer time (time 3) is newly set (77), and then the end of page recognition signal is set within the predetermined time. If it is received (78,79), if it is received, the next page is repeatedly received from the above-described training reception process 53, and if the end-of-page recognition signal is not received within a predetermined time, the transmission / reception end signal DCN is received by an external fax. (Disconnect) sends a signal (72), sets the relay to phone mode (73) and clears the flag bit of the computer (74) in facsimile reception mode. It goes off.

However, if the EOM is received because there is a page to be received in a mode different from the mode currently received (70), then another page is sent to the computer after the MCF, an acknowledgment signal that the previous page was well received by the external facsimile (80). After transmitting the page ending signal indicating that is continued (81), the timer time (time 4) is newly set (82). Then, it checks whether the end-of-page recognition signal is received from the computer within the set time (time 4) (83, 83), and if it is received within the predetermined time, sends DIS to the external fax and receives DCS from the external fax to receive the mode again. (52, 53), the next page is received. If the end-of-page recognition signal is not received within the set time, the procedure 72, 73, 74 exits from the facsimile receiving mode, and ends.

If the received end signal (EOP) is received on the currently received page (71), the external page transmits an acknowledgment signal (MCF) indicating that the last page is well received (85), and the last page is received to the computer. After transmitting the file end signal, which is a signal that another page is not continuous (86), the timer time (time 5) is newly set (87), and then the file end recognition signal within the set time (time 5). Is received (88,89) as soon as it exits the facsimile reception mode (72, 73, 74), and if the end-of-file recognition signal is not received from the computer within the above time 5 to handle the reception error After step 90, the process 72, 73, 74 to exit the facsimile reception mode is performed.

After the modem interrupt is disabled, even when none of the MPS, EOM, and EOP signals are received, the process ends after the steps 72, 73, and 74 exit from the facsimile reception mode.

3A and 3B are an interrupt execution flowchart according to the present invention. FIG. 3A is a modem interrupt routine, and FIG. 3B is an interrupt routine for transferring the contents of a line buffer to a computer. First, the modem interrupt routine is enabled during the execution of the main program of FIG. 2 and stored in the RAM FIFO (First-In First-Out), which is enabled and transmitted from the external facsimile (91) and returns.

The buffer contents transfer interrupt routine (INTTX) is enabled when the line buffer is full when the data received from the FIFO is transferred to the line buffer during modem interrupt (MDM-INT) during execution of the main program of FIG. After the contents of the line buffer are transferred to the computer (92), the pointer value of the buffer is checked (93) and repeated until the transfer is completed. If the transfer is completed, the buffer contents transfer interrupt routine is disabled (94) and returned. do.

The present invention transmits image data transmitted from an external facsimile to a computer and stores the image data transmitted from an external facsimile in a system configured by directly connecting a facsimile apparatus and a computer to be stored in a hard disk of the computer. It has the effect of greatly improving the convenience of the image.

Claims (7)

Modem and network control means 13 connected to a public communication network for transmitting and receiving images with an external facsimile; facsimile control means 11 connected to the modem and network control means for controlling input and output of image data; and the facsimile control means. A facsimile device 10 connected to the computer and having a serial connection means 14 and a first RS232C connection means 16 for connecting to a computer (PC), and a second RS232C connection means 26 for connection with an external device. ), A main memory means 22 composed of a ROM and a RAM, a hard disk 23, a keyboard 24 and a monitor 25 as an input / output device, and the second RS232C connection means hard disk keyboard monitor and a main. A facsimile-side control method for receiving image data in a system in which a computer 20 having main computer means 21 connected to a memory means and performing general control is connected. A first step of transmitting a reception request signal to a computer when a ring signal is detected while the program is in standby; When the reception ready signal is received from the computer within a predetermined time period, the relay of the modem and the network control means is switched to the facsimile mode, the external facsimile is informed of the called recognition (CSI) and the receiving side specification (DSI), Receiving a set-up specification (DCS) of the side; Receiving a training signal to determine whether the line state can accommodate the transmission rate and adjusting the transmission rate appropriately; A fourth step of transmitting a training success signal (CFR) to an external facsimile and transmitting a reception mode to a computer side according to the setup specification (DCS) of the calling party; A fifth step of enabling a modem interrupt to receive image data when a mode recognition signal is received from the computer within a predetermined time; When the reception of one page is completed, it disables the modem interrupt and determines whether there is a next page to receive and receives the next page in the same mode, the next page in another mode, or receives the file end command and sends it to the computer. Sixth step; And a seventh step of transmitting a relay switching signal to an external facsimile and setting the relay to a telephone mode to terminate the reception mode. . The method of claim 1, wherein the third step comprises: an eighth step of receiving a training signal from an external facsimile; A ninth step of checking a current transmission rate and lowering one step if the received training signal is not good; Transmitting a training failure signal (FTT) to an external facsimile; And an eleventh step of repeating the process of receiving the setup signal from the calling party and receiving the training signal. The image data reception according to claim 5, wherein the image data reception in the fifth step transfers and stores the data received from the modem interrupt into the line buffer until the carrier bit in the modem is turned off. 12. A method of controlling a facsimile side for receiving image data in a computer-facsimile connection system, characterized in that step 12 is performed to enable data transmission to a computer side. The method as claimed in claim 3, wherein the reception of the next page in the same mode in the sixth step transmits a signal MCF, which is a reception call value indicating that the previous page is well received by an external facsimile, and then informs the computer that the next page exists. step; And receiving the image data in the computer-facsimile access system, wherein, if the recognition signal is received from the computer within a predetermined time, the step 14 is repeated from the step of receiving the training signal of the third step. Facsimile control method 4. The method of claim 3, further comprising: receiving a next page in another mode in the sixth step by transmitting an acknowledgment signal indicating that the previous page is well received by an external facsimile, and then notifying the computer that the next page exists; And a sixteenth step of repeating the process of receiving the setup specification of the calling party in the second step if the recognition signal is received from the computer side within a predetermined time. Facsimile control method for receiving data. 2. The image of claim 1, wherein the modem interrupt routine enabled in the fifth step is performed by a seventeenth step of storing data from an external facsimile in a FIFO buffer. Facsimile control method for receiving data. 4. The method of claim 3, wherein the buffer contents transfer interrupt routine enabled in the twelfth step comprises: transferring the contents of the line buffer to the computer; A nineteenth step of checking the buffer pointer value and repeating the operation from the eighteenth step until the transmission is completed; And a twentieth step of disabling the buffer content transfer interrupt routine when the transfer is completed.