KR910006679B1 - Fax protocol method for computer - Google Patents

Abstract

The method is for realizing facsimile protocol to communicate the picture data using computers and telephone network. The method includes steps: (A) checking the ring signal and the transmission request signal; (B) hooking off and generating a dial tone to call the receiver when the transmission request signal is detected; (C) checking the possibility of transmission by inspecting the functions and the filter characteristics of the receiver; (D) reading the first line of the document file to the transmitted, attaching EOL and fill data on the head of the line, and transmitting the line data to the transmission buffer to the last line data; (E) sending the EOP data when the line data transmission is completed and checking the receive completion signal; and (F) complexting the file transmission by hooking on.

Description

How to implement a facsimile protocol on a computer

1 is a system diagram for carrying out the present invention.

2 is a flow chart of the present invention.

* Explanation of symbols for main parts of the drawings

100: computer 110: modem

120: telephone interface 130: DAA

140: system interface 150: RTC

160: Decoder and Interrupt Logic

The present invention relates to a method for transmitting and receiving image information through a public telephone communication network in a communication apparatus, and more particularly, to a method for implementing a facsimile protocol to transmit and receive image information on a computer.

In general, a facsimile is widely known as a device capable of mutually exchanging image information through a public telecommunication network, and the facsimile scans the contents of an original printed on paper and transmits the contents to a counterpart fax through a public telecommunication network. Recently, there has been a rapid increase in the use of a computer equipped with a word processor as a database for collecting and archiving information. In this case, when a computer intends to transmit a processed data file, Print the data file through a printer to create an original, and then send the original through the public telephone network to the fax of the other station through the fax.

On the other hand, the receiving side inputs the data file manuscript received through the facsimile to the computer using an image scanner to process and store the data file by the image processor software of the computer.

However, when collecting and archiving document files using the computer, a printer, a facsimile machine, and an image scanner must be provided in order to send a data file of a computer which is being stored or processed or to input a received data file manuscript into a computer. In addition, there is a waste of time and a lot of manual work generated by using the printer, the fax and the image scanner.

Accordingly, an object of the present invention is to provide a method for implementing a facsimile protocol on a computer capable of transmitting and receiving document files through a public telephone communication network on a computer.

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

1 is a system diagram for carrying out the present invention, which is a computer 100 having a word processor for controlling the collection and transmission of information files and storing and storing information, and converts digital data to be transmitted into analog signals. And a modem 110 for converting the received analog signal into digital data, a telephone interface 120 for interfacing the modem 110 and a public telephone communication network, and detecting a ring signal, and the modem 110 and the telephone. A system for interfacing the modem 110 and the computer 100 with a data access arrangement 130 for amplifying and filtering analog signals transmitted and transmitted between the interfaces 120. Generates an interface 140, a real time clock and a real time information of a predetermined period and transmits the generated information to the system interface 140. The Real Time Controller (hereinafter referred to as RTC) 150, and control the telephone interface 120 and modem 110 and RTC 150, and generates status data and ring interrupt for the operation state And a decoder and a decoder logic (160) to transmit to the system interface (140), Figure 2 is a flow diagram of the present invention and the first process of checking whether the ring signal is detected or the transmission request signal is input and In the first process, the second process of hooking-off when a transmission request signal is input and generating a dialon to call the other station, and the capability and function of the other station called after performing the second process, filter The third step of checking the transmittance by testing the characteristics, and reading the data by the amount corresponding to one line in the compressed and stored document file after Huffman modulated when the transmission is possible in the third step Check whether there is a storage capacity corresponding to a predetermined line in the transmission buffer, and when the storage capacity is reached, the end of line data and fill data are added to the beginning of the first line of data. A fourth step of sequentially inserting and sending the last line data into the credit buffer; and when the last line data is sent in the fourth step, the end-of-page data is transmitted after receiving the end-of-page data. A fifth step of checking whether is inputted; and a sixth step of transmitting a line short signal when the reception completion signal is input in the fifth step, and then hooking-on to end the document file transmission; In the process, when the ring signal is detected, it checks whether or not it is in a receivable state. Is an eighth process of checking receptionability by adjusting its filter characteristic with a filter characteristic, a ninth process of checking whether EOL data is input for a predetermined time when the reception is possible in the eighth process, and the EOL in the ninth process. When the data is input, the first EOL input is checked to check whether the first EOL date and time are returned to the ninth process, and when the first EOL input is not the first EOL input, the data of one line among the received data is extracted and filled. (FILL) the eleventh process of removing the data and storing it in the reception file, the twelfth process of returning to the ninth process if the EOP data is not checked after the eleventh process is performed, and the twelfth process In step 13, when the EOP data is input in step 13, the reception completion signal is transmitted, and when the line short signal is input, hook-on ends the reception operation. If the reception completion signal is not input in step 5 or if reception is not possible in step 8 or if EOL data is not detected for a predetermined time in step 9 or if the line short signal is not input in step 13, an error message is displayed on the file. After the hook-on is made of a fourteenth step of abnormal termination.

Accordingly, the present invention will be described in detail with reference to FIGS. 1 and 2.

First, a brief description of FIG. 1 is as follows. The computer 100 inputs the document file collected by the operator through a word processor and performs a transmission operation when the transmission request key data is input through the word processor, and a ring interrupt signal is input through the system interface 140. In this case, the reception operation is performed.

The modem 110 inputs data into a document file to be transmitted through the system interface 140, converts the data into an analog signal, outputs the data to the DAA 130, or converts the received analog signal from the DAA 130 into digital data. The conversion is output to the computer 100 through the system interface 140.

In addition, the DAA 130 amplifies and filters the analog signal to be transmitted from the modem 110 and transmits it to the telephone interface 120 or amplifies the received analog signal input from the telephone interface 120. The filter is transmitted to the modem 110.

In addition, the telephone interface 120 connected between the DAA 130 and the public telephone communication network connects or blocks the DAA 130 and the public telephone communication network to match the impedance to generate a ring signal.

Meanwhile, the RTC 150 generates a rhythmic clock of a certain period and counts real time information and outputs the real time information to the computer 100 through the system interface 140. The decoder and interrupt logic 160 generate a ring interrupt when the ring signal is input from the telephone interrupt 120 and output the ring interrupt to the computer 100 through the system interface 140, and the modem 110 and the RTC. Monitoring the operation state of the 150 to generate the state data to decode the control data applied from the computer 100 through the system interface 140 to the corresponding modem 110 and RTC 150 and telephone interface ( 120). Finally, the system interface 140 relays control data and transmission / reception data between the modem 110 and the RTC 150 and the decoder and interrupt logic 160 and the computer 100.

2 will be described in detail with reference to FIG. 1. When a ring signal is applied from the telephone station through the public telephone communication network by the call of the other station, the decoder and interrupt logic 160 detects the telephone signal of the telephone interface 120 and sends it to the decoder and interrupt logic 160. The decoder and interrupt logic 160 then generates a ring interrupt based on the ring signal and outputs the ring interrupt to the computer 100 through the system interface 140.

At this time, the computer 100 checks whether a ring interrupt is input through the system interface 140 (step 200) or whether a transmission request key data is input through a word processor (step 201).

When the transmission request key data is input through the word processor in step 201, the computer 100 hooks off the telephone interface 120 through the system interface 140, the decoder, and the interrupt logic 160 to public-telephone communication network. And the modem 110 is controlled to generate a dial tone (i.e. ring tone) from the modem.

At this time, the modem 110 generates a dial tone and transmits it to the public telephone communication network through the DAA 130 and the system interface 120 (step 202).

After performing step 202, the computer 100 checks whether an answer tone for a call is detected and sends a calling tone confirming whether the other station is a modem when the answer tone is detected. From the information on the functionality and capability of the modem, i.e., a digital identification signal (hereinafter referred to as DIS), is detected.

When the DIC is detected, the computer 100 compares its capabilities by the DIC, selects a possible function among the capabilities of the other station, and selects a digital command signal of a performance command for the selected function (hereinafter referred to as DCS). Transmits a training signal for testing the selected function, and then determines whether a confirm to receive signal (CFR) that the filter characteristic test for the selected function is successful is detected. The transmission possibility is determined (step 203).

The process of checking the transmission possibility in step 203 is performed by communicating with a counterpart station through the system interface 140 and the modem 110 and the DAA 130 and the telephone interface 120.

When transmitting is possible in step 203, the computer 100 reads data by an amount corresponding to one line of the document stored in the compressed and modulated Hoffman (step 204), and then a storage capacity corresponding to a predetermined line in the transmission buffer. Whenever there is an extra (step 205), the EOL data and the fill data are added to the beginning of the data corresponding to the first line (step 206) and inserted into the transmission buffer (step 206). In step 207, the processor 110 transmits the data through the modem 110, the DAA 130, and the telephone interface 120.

After performing step 207, if there is data left to be transmitted on the document file, that is, whether all the information corresponding to the last line has been transmitted, the process returns to step 204 (step 208).

When there is no data to transmit in step 208, the computer 100 checks the real time clock applied from the RTC 150 through the system interface 140, and thus the transmission end signal, that is, EOP, by the real time clock. The data is generated and transmitted to the public telephone communication network through the system interface 140, the modem 110, the DAA 130, and the telephone interface 120 (step 209).

After performing step 209, the computer 100 receives the received signal, that is, the message confirm (MCF) through the telephone interface 120 and the DAA 130, the modem 110, and the system interface 140. In step 210, it is checked whether data is received.

When the MCF data is received in step 210, a line short signal, that is, disconnect (DCN) data is generated to generate a system interface 140, a modem 110, a DAA 130, and a telephone interface 120. After transmitting to the public telephone communication network through the control system and the system interface 140, the decoder and interrupt logic 160 to control the telephone interface 120 to disconnect the call line by hooking on (step 211).

On the other hand, when the ring signal is detected in step 200, the computer 100 inputs state data of the modem 110 through the system interface 140, the decoder, and the interrupt logic 160 to check whether the voice call is in progress. Step 212).

When the modem 110 is not in the voice call state during the idle state in step 212, the computer 100 controls the telephone interface 120 through the system interface 140, the decoder, and the interrupt logic 160. In step 213, the call line is hooked off. After performing step 213, the computer 100 checks the reception possibility by communicating with a counterpart station through a public telephone communication network through the system interface 140 and the modem 110, the DAA 130, and the telephone interface 120. The description is as follows.

First, Answer Tone for dial tone (call tone) is transmitted, and then call tone is input. When call is input, computer 100 sends DIS and then DCS and training tone are input. In step 100, the control characteristics of the modem 110 are adjusted using the training tone to check whether data to be transmitted from the other station can be received, and if it is determined that data can be received, the CFR is transmitted (step 214).

When it is determined that the reception is possible in step 214, the computer 100 sets a timer embedded therein (step 215), and then the system interface 140, the modem 110, the DAA 130, and the telephone interface ( In step 216, it is checked whether EOL data is input.

When the EOL data is not input in step 216, the computer 100 increases the time of the timer when the real time clock applied from the RTC 150 is applied through the system interface 140, and then the time of the timer is predetermined. If the time is not checked, the process returns to the step 216 (step 217).

When the EOL data is input in step 216, the computer 100 checks whether the input EOL data is the first EOL data, and returns to step 215 at the time of the first EOL. (Step 218).

When the first EOL data is not the first EOL data in step 218, data corresponding to one line of the data received by the computer 100 is extracted (step 219), and the fill data is removed from the extracted data (step 220). . After performing step 220, the computer 100 stores data corresponding to one line from which the fill data is removed in a document file (step 221), and then the system interface 140 and the modem 110, the DAA 130, and the tele. The EOP data, which is a transmission end signal, is input through the phone interface 120 (step 222).

When the EOP data is input in step 222, the computer 140, the modem 110, the DAA 130, and the telephone interface 120 transmit the data to a counterpart station through a public telephone communication network (step 223).

After performing the step 223, the computer 100 receives the system interface 140 and the modem 110, the DCN data, which is the line short signal, through the DAA 130 and the telephone interface 120. The telephony interface 120 is controlled through the decoder and the interrupt logic 160 to release the connection of the call line (step 224). When the computer 100 cannot transmit in step 202 or when MCF data is not input in step 210 or cannot receive in step 214 and the counted time of the timer in step 217 is a predetermined time. If the DCN data is not input in step 224, an error message is displayed on the document file, and then the telephone interface 120 is controlled through the system interface 140, the decoder, and the interrupt logic 160 to control the telephone line. The hook is turned on by releasing the connection (step 225).

In the above description, the format of the EOL data is "0" in the least significant bit of "0", for example, 000000000001, and fill data is "0" in the predetermined bit, for example, 000000000000. And, the EOP data is a form in which the EOL signals are arranged every time a real time clock is applied for a predetermined number of real time periods, for example, 000000000001 000000000001 000000000001 000000000001 000000000001 000000000001.

As described above, a document file can be created on a computer and transmitted to a counterpart station through a direct public telecommunication network, and a fax and an image scanner printer can be used for receiving and storing the document file through the public telecommunication network. There is an advantage to enable long-distance communication even without the necessary devices.

Claims (1)

An image information communication method of a communication apparatus for exchanging information through a public telephone communication network, the method comprising: a first step of checking whether a ring signal is detected or a transmission request is input, and a hook-hop when the transmission request signal is input in the first step; A second process of calling a counterpart station by generating a dial tone, a third process of checking the capability and function of the called party after performing the second process, and testing a filter characteristic to check the transmittance; When transmission is possible, the data is read out by the amount corresponding to one line after the modulation of the HOPE tube is compressed, and the storage buffer corresponding to the predetermined line is checked in the transmission buffer. In the fourth process of adding the EOL data and the fill data at the beginning and inserting and sending sequentially to the last line data to the transmission buffer, and in the fourth process A fifth step of checking whether the reception completion signal is input after transmitting the EOP data when the data of the last line is transmitted; and sending a line short signal when the reception completion signal is input in the fifth step, and then hooking on the document file A sixth step of terminating the transmission, a seventh step of hooking-off when the ring signal is detected in the first step by checking whether or not it is in a receivable state, and performing a hook-off when performing the seventh step; Process 8 for checking receptionability by sending a signal to the other station and adjusting its filter characteristic with the filter characteristic requested by the other station, and a ninth process for checking whether EOL data is input for a predetermined time when it is receivable in step 8 above. And a tenth step of returning to the ninth step of the first EOL date and time by checking whether the first EOL is input when the EOL data is input in the ninth step, and the first in the tenth step. The eleventh step of extracting the data of one line from the received data and removing the fill data when the EOL data is not inputted and storing the received data in the received file; A twelfth step of returning to the ninth step; a thirteenth step of transmitting a reception completion signal when the EOP data is input in the twelfth step and then hooking-on to terminate the reception operation when the line short signal is input; In the case where transmission is impossible in step 3 or when the reception completion signal is not input in step 5, in the case where reception is not possible in step 8, or when EOL data is not detected for a predetermined time in step 9, or when the line short signal is input in step 13 Implement the facsimile protocol on the computer, characterized in that the fourteenth step of displaying an error on the file and then hook-on and terminate abnormally Way.

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