JPH06121101A - Protocol converting device - Google Patents

Abstract

PURPOSE:To easily connect a G3 facsimile to a data terminal equipment such as a personal computer and to perform facsimile communication each other. CONSTITUTION:A main controller 107 divides one identification telegraphic message generated based on destination information extracted by a multiprotocol serial controller 124 and FAX image data received from the G3 facsimile into plural blocks. Then, plural facsimile telegraphic messages generated based on these blocks and a control telegraphic message generated corresponding to a facsimile signal are sent through an RS-232C controller 113 to a MODEM.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protocol conversion device for connecting an information processing device and a group 3 facsimile (G3 FAX).

[0002]

2. Description of the Related Art Conventionally, as described in "Facsimile communication system" of Japanese Patent Laid-Open No. 62-204654, G3FA has been proposed.
In order to connect X to the packet network, an adapter device is provided between the G3 FAX and the packet network, and the G3 facsimile procedure recommended by CCITT is performed by the adapter device. 25 procedures or X. A method of converting 25 procedures into G3 facsimile procedures has been proposed.

A method has also been proposed in which printout output from a host computer is output to a facsimile via an adapter device.

[0004]

However, the above-mentioned prior art does not disclose a method for connecting the G3 FAX and a data terminal device such as a personal computer at all, and it is easy to connect the data terminal device to the G3 FAX. I couldn't. An object of the present invention is to provide a protocol conversion device capable of easily connecting a G3 FAX to a data terminal device such as a personal computer and communicating with each other.

[0005]

The present invention is a protocol conversion device for converting a facsimile communication procedure into a bisync communication procedure, and means for generating one identification message based on the destination information obtained in the facsimile pre-procedure. , FA
It is characterized in that it is provided with means for dividing the X-image data into a plurality of blocks and generating it into a plurality of facsimile telegrams, and means for generating a control telegram corresponding to a facsimile signal.

[0006]

With the above structure, the G3 FAX and the data terminal device such as a personal computer can be easily connected, and the data terminal device can perform the facsimile communication with the G3 FAX.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings.

1. System Configuration FIG. 1 is a system configuration diagram showing the system configuration of the present invention. In FIG. 1, one of the protocol conversion devices 1 is provided with a data terminal device (DTE) 2 via modems 6 and 7.
Is connected to the other side, and G3FAX3 is connected to the other side. The protocol conversion device 1 controls the communication connection between the data terminal device 2 and the G3 FAX 3 (so-called,
Protocol conversion).

The data terminal device 2 is, for example, a personal computer, and has a central control unit (CPU) 21 and
Display 23, display control device (CRTC) 22 for controlling display 23, and keyboard 25
And a keyboard control device (2
4), an external storage device 27 such as a hard disk and an external storage device controller (HDC) for controlling the external storage device 27.
26, a temporary storage device (RAM) 28, and a fixed storage device (ROM). Further, an interface device (I / F) 30 that forms an interface with the protocol conversion device via the modem 7, the communication line 4, and the modem 6.
Is prepared. This interface device 30 is an EIA
It is a so-called RS-232C interface which is a modem interface conforming to the recommendation in. Further, the interface device 30 compresses the image information by the MR or MH method and the image information by the MMR or MH method.
An image compression / expansion control device (DICEP) 30 'for expanding image information compressed by the method is connected to convert normal image information into FAX image data. In addition,
Each device in the data terminal device 2 is connected to the bus 31, is logically connected to the central control device 21 via the bus 31, and operates under the control of the central control device 21. . The G3FAX 3 is a normal facsimile machine and is connected to the protocol conversion apparatus 1 by a two-wire communication line 5.

2. Protocol Conversion Device 2.1 External View FIG. 2 is a front perspective view of the protocol conversion device 1. In FIG. 2, an operation panel 101 is provided on the front surface,
On the operation panel 101, a maintenance panel section 101-1 for performing maintenance of the apparatus, and L for displaying the state of the apparatus and the like.
The ED unit 101-2 is included. A ventilation port 102 for heat dissipation is provided on the side surface of the housing. FIG. 3 is a rear perspective view of the protocol conversion device 1. Figure 3
On the back side, there is a rosette 103 on which a rosette cord 103 'for connecting to the G3 FAX 3 is attached,
RS-232C connection port 104 for attaching a modem interface cable 104 'for connecting to a modem
, A power switch 105, and a power cable 106 connected to an AC commercial power source.

2.2 Structure of Panel FIG. 4 is an enlarged view of the operation panel 101. In FIG. 4, the LED unit 101-2 has a power LED 101-20 indicating the ON / OFF state of the power source, and an operable LE indicating that this device has finished the initial diagnosis and is ready for use.
In-communication LE indicating that communication is in progress with D101-21
D101-22, a fault LED 101-23 indicating that this device is in an abnormal state, and a test LED 101- indicating that this device is in initial diagnosis or in maintenance mode.
24 and are included. In addition, the maintenance panel unit 101-
1, DIP switch 101-11 for setting the state of the device such as maintenance mode, operation mode, communication speed,
Indicator 1 for displaying the status or error of this device
01-10, a reset switch 101-12 for returning the apparatus to the initial state, a function switch 101-13 for setting a test mode or a maintenance mode in combination with the reset switch 101-12,
Test execution switches 101-14 and 101-15 for designating execution of various tests in the maintenance mode are included.

2.3 Hardware Configuration FIG. 5 is a block diagram showing the hardware configuration of the protocol conversion device of the present invention. In FIG. 5, a protocol conversion device 1 is a main control device (MAIN CPU) 1
07 and the sub-control unit (SUB CPU) 108
It is equipped with two control devices. The main controller 107
It controls the entire protocol conversion device, and the sub-control device 108 is under control. The sub controller 108 controls communication with the G3 FAX 3.

A bus (MAIN) on the main controller 107 side
The bus) 117 has a fixed storage device (ROM-B) 109 that stores a control program for the main control device 107 to perform a processing operation, and a temporary storage for the main control device 107 to perform control. A temporary storage device (RAM-B) 110 for storing data is connected, and these fixed storage device 109 and temporary storage device 110 are connected.
Control is carried out by and. In addition, the operation panel 1
The panel controller (KDC) that controls 01 is connected to the bus 117, and the LED of the maintenance panel 101
Display and key scan control are controlled by the main controller 107. The multi-protocol serial controller (MPSC-B) 112 performs parallel-serial conversion of data according to a predetermined format, and is connected to the bus 117 and the RS-232C controller 113 that forms the interface of RS-232C. ing.

On the other hand, the bus (SU
A fixed storage device (ROM-A) 118, which stores a control program for the sub-control unit 108 to perform processing operations, and a temporary bus for the sub-control unit 108 to perform control. To a temporary storage device (RAM-A) 119 for storing data in
Control is performed by the fixed storage device 118 and the temporary storage device 119. Also, a line control unit (NCU) 123 that forms an interface with the G3 FAX 3
And CCITT T.W. According to 30 recommendations, so-called,
Facsimile modem (MODEM) 125 that realizes G3 facsimile modulation / demodulation procedure, and multi-protocol serial controller (MPSC-A) that performs parallel-serial conversion of data according to a predetermined format.
124, an image compression / expansion control device (DICE) for compressing image information in the MR or MH system and expanding image information compressed in the MMR or MH system.
P) 121 and an image storage device (DPRAM-A) 120 for temporarily storing image information are connected to the bus 127 and operate under the control of the sub control device 108.

An image compression / expansion control device 121,
The image storage device 120 is connected by an image bus 122, and image information is transmitted and received by the image bus 122. Further, the line control device 123 and the multi-protocol / serial controller 124 are connected to the facsimile modem 125, and the image information is modulated and demodulated by the facsimile modem 125.
It is configured to be transmitted / received to / from 3 FAX 3.

Further, a data transmission / reception device (DPRAM-B) 114 which is a temporary storage device for the main control device 107 and the sub control device 108 to transmit / receive control data to / from both the bus 117 and the bus 127. And two image information transmission / reception devices (DPRAM-C, D) 115 and 116, which are temporary storage devices for transmitting / receiving image information, are connected, and these transmission / reception devices connect the main control device 107 side and sub-controls. Control data and image information are transmitted / received to / from the device 108 side.

FIG. 6 is a diagram showing the outline of the internal configuration of the line control device 123 shown in FIG. In FIG. 6, the line control device 123 includes a bus interface 601 and is controlled by the sub control device 108.
To the bus interface 601, a relay (IR) 602 that sends an incoming signal (for example, an AC signal of 75 V, 20 Hz) to the G3FAX3, a call current to the G3FAX3, and a current supply that detects a loop of the G3FAX3. The circuit (PS) 603 is connected. Current is supplied from the current supply circuit 603 to the G3FAX via the relay contact ir and the loop CL, and when the G3FAX3 forms a loop and a current flows, it is detected from the loop detection terminal (LOOP) of the current supply circuit 603. The signal is output.

Further, a ringing power source CR for generating an AC signal of 75V, 20Hz is provided, and when the relay (IR) 602 operates under the control of the sub-control unit 108, this AC signal gives a relay contact ir and a wire ring. It is supplied to G3FAX3 via CL, resistor R0, and power supply E.
Further, the lines L1 and L2 (the rosette code 103 ') from the G3FAX3 are connected to the facsimile modem 125 from the latter stage of the relay contact ir via the DC cutting capacitors C0 and C1.

FIG. 7 shows the protocol conversion device 1 and the G3FA.
It is a figure which shows the structure of the rosette cord 103 'which connects with X3. In FIG. 7, the rosette cord 103 ′ is connected to the two outer terminals of the modular plug 701 on the protocol conversion device 1 side, and the rosette cord 103 ′ is connected to the two inner terminals of the modular plug 702 on the G3FAX3 side. There is. This regulates the connection between the protocol conversion device 1 and the G3FAX3.

3. Interface Condition 3.1 Interface Condition between Protocol Conversion Device and Data Terminal Device FIG. 8 is a diagram showing interface conditions between the protocol conversion device 1 and the data terminal device 2. The protocol conversion device 1 and the data terminal device 2 are RS-2.
Connected by 32C interface, modem 6,7
The communication control is performed through a bit-oriented synchronous procedure (HDLC procedure). In FIG. 8, the interface condition between the protocol conversion device 1 and the data terminal device 2 will be described in detail. The synchronization mode is synchronous synchronization (SY).
N synchronization), the transmission speed is 19.2 kbps, and the electrical interface is V. 28, the transmission method is the transparent mode method, the connection method is the contention method, the communication method is the half-duplex communication method, and the transmission error detection method is C.
The RC method and the facsimile data from the data terminal device 2 are in the MH or MR encoding system.

3.2 Protocol converter and G3 FAX
FIG. 9 is a diagram showing interface conditions between the protocol conversion device 1 and the G3FAX3. Protocol converter 1
The interface between G3 FAX3 and G3 FAX3 is T. Communication control is performed by a so-called G3 facsimile procedure that complies with 30. In FIG. 9, the interface conditions between the protocol conversion device 1 and the G3 FAX 3 will be described in detail. The main scanning line density is 8 dots / mm and the sub-scanning line density is 7.7 line / mm or 3.85 line / m.
m, document size is A4 or B5 size, minimum transmission time is 10 mS and 3.85 at 7.7 line / mm.
20 mS at line / mm, MH or MR coding system, and 9600 bps transmission speed,
7200bps, 4800bps or 2400bps
I am trying.

3.3 Connection State between Protocol Conversion Device and Modem FIG. 10 shows the connection state between the protocol conversion device 1 and the modem 6, which is the signal line name of the RS232-C interface, its signal direction, It is a figure which shows the meaning of and its signal wire. In FIG. 10, the meaning of the signals will be described. The RD signal is a data signal transmitted by the protocol conversion device 1, the SD signal is a data signal received by the protocol conversion device 1, and the RS signal is a data signal when the data terminal device 2 transmits data. The transmission request signal to be received, the CS signal is a response signal from the protocol conversion device 1 to the transmission request signal from the data terminal device 2, the DR signal is a status display signal indicating that the protocol conversion device 1 is operable, and the CD signal is A signal indicating that the protocol conversion device 1 has detected a reception carrier, a T1 signal indicates that the protocol conversion device 1 is under test, and ST2 is a transmission signal element timing that the protocol conversion device 1 supplies to the data terminal device 2. And the RT signal are the protocol conversion device 1
Is a signal indicating the received signal element timing to be supplied to the data terminal device 2. The SG signal is used as a signal return line, and the FG signal is frame ground.

3.4 Information Block Format FIG. 11 is a diagram showing a format of an information block transmitted and received between the protocol conversion device 1 and the data terminal device 2, and FIG. 12 is an information block shown in FIG. FIG. 6 is a diagram illustrating the meaning of characters used in the format of FIG. 11 and 12, DLE 1101, 1
106 is a character indicating that the transmission control function has been expanded, STX 1102 is a character indicating the end of a header and the start of a text block, an identifier 1103 is an area indicating information on a command name of data to be transmitted, and a valid data byte length (L) 1104. Is an area indicating the byte length of data to be transmitted, data 1105 is an area for data to be transmitted (FAX image data, control data, etc.), and ETB / ETX11
In the case of ETB, a character 06 indicates the end of the heading block or the end of the text block when the text is divided and transmitted, and in the case of ETX, the character 06 indicates the end of the text. Also, CRC11
Reference numeral 08 is an area of additional information for detecting a transmission error.

FIG. 13 is an information block transmitted and received between the protocol conversion device 1 and the data terminal device 2, and the command name and its command notified by the text information part (identifier 1103) of the format shown in FIG. It is a figure explaining a meaning. In FIG. 13, “message identification” is a command for notifying the start of a message, and “message end log” is for sending / faxing one message
A command to notify the completion of reception, "Page identification (MP
S) ”means that when fax image data is being sent,
At the end of the page, a command to notify that there is a next page, "Page identification (EOP)" is a command to notify the end of transmission of the last page of FAX image data, and "Abandon message midway" detects an error in the data terminal device. When this is done, a command for notifying the protocol conversion device of abandonment of the message, "FAX image data" is a command for notifying transmission of FAX image data compressed by the MH or MR encoding method, and "Data request" is protocol conversion. FAX on the device side
The command for notifying the data terminal device that the preparation for receiving the image data is completed, "adapter log request" is a command for the data terminal device to request transmission of log data in the protocol conversion device to the protocol conversion device, and ,
The "adapter log data" is a command for the protocol conversion device to notify the data terminal device of the transmission of the log data in the protocol conversion device.

3.5 Control Signals Used in Communication Protocol FIG. 14 is a diagram for explaining control signal names used in the communication protocol between the protocol conversion device and the data terminal device and their meanings. In FIG. 14, "EOT"
Is a signal "ENQ" indicating the end or termination of transmission of an information block (heading block, text block)
"ACK0" and "ACK1" are signals used when soliciting reception to the other party as a selecting sequence or urging a response to the information block, and "ACK0" and "ACK1" are signals indicating an acknowledgment of the selecting sequence or the information block. "NAK" is a signal indicating a negative response of the selecting sequence or the information block, "WAC".
"K" is used as a selecting sequence or as a response to an information block (meaning positive for the information block), and is a signal indicating that reception of the next information block is temporarily impossible. "RVI" is used as an acknowledgment for the information block, and a signal indicating that the right to transmit is requested, and "TTD" indicates that the next information block to be transmitted is not yet ready to be transmitted. Alternatively, it is a signal used when transmission is intentionally terminated abnormally. In addition, "ACK0" and "A
"CK1" is configured to be alternately transmitted when making an affirmative response, thereby facilitating management of the state of the communication protocol.

4. Outline of operation of protocol conversion device 4.1 Data transmission from G3 FAX to data terminal device FIG. 15 shows a FAX from G3 FAX 3 to data terminal device 2.
It is a figure which shows the outline | summary of operation | movement of the protocol conversion apparatus 1 at the time of transmitting image data. First, the line control device 123 establishes a line between the G3FAX3 and the line control device 123, executes a facsimile connection sequence (pre-procedure sequence) between the facsimile modem 125 and the G3FAX3, and then performs line control of FAX image data. Device 123,
And the multi-protocol serial controller 124 via the facsimile modem 125 (A
1). The pre-procedure information blade and the sub-control device 10 at this time
8 is written in the data transmitting / receiving device 114 as operation information (A5).

Next, the facsimile modem 125 uses the FA
The X image data is converted into parallel data according to a predetermined format and transferred to the temporary storage device 119 (A2).
Next, the FAX image data stored in the temporary storage device 119 is transferred to the image compression / expansion control device 121, the FAX image data is converted into normal image data together with the image storage device 120, and the RTC signal (FAX image data Signal indicating the end of the above (details will be given later) will be detected (A3). Next, the FAX image data stored in the temporary storage device 119 is transferred to the image information transmitting / receiving devices 115 and 116 (A4), and the sub control device 108 writes the operation end information in the data transmitting / receiving device 114 (A5).

Next, the main controller 107 reads the operation end information of the sub controller 108 from the data transmitter / receiver 114 (A6), and the image information transmitters / receivers 115 and 11 are read.
The FAX image data stored in 6 is stored in the temporary storage device 110.
(A7). Next, the FAX image data stored in the temporary storage device 110 is transferred to the multi-protocol serial controller 112, and the FAX in parallel format is transmitted.
Convert the image data to FAX image data in serial format, and
The data is transmitted to the data terminal device 2 via the S-232C controller 113 (A8). In this way, G3FAX3
Transmits the FAX image data to the data terminal device 2.

4.1 Data Transmission from Data Terminal Device to G3 FAX FIG. 16 shows a FAX from the data terminal device 2 to G3 FAX 3.
It is a figure which shows the outline | summary of operation | movement of the protocol conversion apparatus 1 at the time of transmitting image data. First, F from the data terminal device 2
The AX image data is sent to the multi-protocol serial controller 112 via the RS-232C controller 113.
To the temporary storage device 1 by converting the serial-formatted FAX image data received and transferred to the parallel-formatted FAX image data.
It transfers to 10 (B1). Next, the FAX image data stored in the temporary storage device 110 is transferred to the image information transmitting / receiving device 1
15 and 116 (B2), and the main controller 107
Writes the operation end information in the data transmitter / receiver 114 (B3).

Next, the sub control unit 108 reads the operation end information of the main control unit 107 from the data transmitting / receiving unit 114 (B4), and the image information transmitting / receiving units 115 and 11 are read.
FAX image data stored in No. 6 is temporarily stored in the temporary storage device 119.
(B5), and further, the FAX image data temporarily stored in the temporary storage device 119 is transferred to the facsimile modem 125 (B6). Next, the facsimile modem 125 transfers the parallel FAX image data to the G3FAX3 via the line controller 123 (B7). In this way, FAX from data terminal device 2 to G3 FAX3
Send the image data.

5. Explanation of Communication Operation 5.1 Communication Operation from G3 FAX to Data Terminal Device (Normal Communication) FIGS. 17 to 19 are diagrams showing a sequence of normal communication operation when facsimile communication is performed from the G3 FAX to the data terminal device. . 17 to 19,
As described above, the protocol conversion device 1 and the G3FAX3 have the T. It is based on 30. The operation will be described below. First, when the G3FAX3 closes the loop and makes a call to the protocol conversion device 1 (170
1), the protocol conversion device 1 returns a response signal (1702). Next, the protocol conversion device 1 receives the called station identification signal (CED), the called terminal identification signal (CSI),
And a digital identification signal (DIS) to the G3FAX3 (1703, 1704, 1705). On the other hand, in the G3FAX3, the digital command signal (DC
S) and the transmitting terminal identification signal (TSI) are returned (1
706, 1707). In this way, both terminals negotiate, the capabilities of the terminals are identified, and a training signal is transmitted (1708).

Next, the protocol conversion device 1 uses the G3FA
A reception preparation confirmation signal (CFR) is transmitted to X3 (1
709), and the G3 FAX 3 transmits the FAX image data to the protocol conversion device 1 (1710). Further, the protocol conversion device 1 transmits ENQ to the DTE 2 (1
711), receiving ACK0 from DTE2 (171)
2), send a message identification command to DTE2 (1713). It should be noted that this message identification command includes information indicating the capability of G3FAX3 obtained by negotiation. Next, the protocol conversion device 1
Receives ACK1 (1714) and sends EOT to DTE2
(1715). In this way, in the sequence from 1711 to 1715, the message identification command is transmitted to the DTE 2, and the DTE 2 prepares to receive the FAX image data.

Next, the protocol conversion device 1 is a G3 FAX.
A sequence of transmitting one block (maximum number of bytes defined in advance) of the FAX image data received from No. 3 to the DTE 2 is executed. To explain this in detail, first, ENQ is transmitted to DTE2 (1716), and the AC from DTE2 is transmitted.
K0 is received (1717). Next, the FAX image data command including the FAX image data for one block received from the G3 FAX 3 is transmitted to the DTE 2 (171).
7). Next, ACK1 is received from DTE2 (171
9) FAX image data for one block is transmitted. Similarly, the FAX image data for one page is transmitted to the DTE 2 block by block (1720, 1721, 172).
2, 1723), and when transmission of one page of FAX image data is completed, EOT is transmitted to DTE2 (1724).
The FAX image data command of the last block sets the end of the text block to ETX. Also, G3F
AX3 finishes sending one page of FAX image data,
When the multi-page signal (MPS) is transmitted (1725) and the protocol conversion device 1 receives this, ENQ is transmitted to the DTE 2 (1726). ACK to this
When 0 is received (1727), the page identification command is D
It is transmitted to TE2 (1728). On the other hand, when ACK1 is received (1729), EOT is transmitted to DTE2 (1730) and a message confirmation signal (MCF) is transmitted to G3FAX3 (1731).

On the other hand, the G3FAX3 receives the MCF and transmits the FAX image data of the next page (the last page in this embodiment) to the protocol conversion device 1 (173).
2). Then, the protocol conversion device 1 similarly transmits a FAX image data command to the DTE 2 according to a predetermined procedure (1733 to 1737). Next, G3 FAX3
Completes the transmission of all FAX image data, and the procedure end signal (E
When OP) is transmitted (1738), the protocol conversion device 1 returns MCF (1739), and G3FAX3
When the disconnection signal from is received (1740), the disconnection process is performed thereafter. The disconnection process will be described. First, the protocol conversion device 1 transmits ENQ to the DTE2 (1741) and receives ACK0 from the DTE2 (1
742), and transmits a page identification command to DTE2 (1743). Next, ACK1 and EOT are transmitted / received (1744, 1745). Next, the protocol converter 1 transmits / receives ENQ and ACK0 to the DTE2 (1746, 1747), transmits a message end log command (1748), and receives ACK1 (174).
9), EOT is transmitted (1750). Furthermore, the protocol conversion device 1 transmits a disconnection signal to the G3FAX3 (1751) and ends the processing. As mentioned above, G3F
A communication operation from the AX to the data terminal device is performed.

FIG. 20 is a diagram for explaining the concept of how the DTE 2 and the G3 FAX 3 transmit and receive FAX image data via the protocol converter 1. Between the protocol conversion device 1 and the G3 FAX 3, the T. 30 FAX image data 203 having a data structure according to the recommendation is transmitted / received, the protocol conversion device 1 edits it, and plural FAX image data commands 201 (may be one depending on the amount of information) are transmitted / received with the DTE 2. Is possible. The RTC 20 included in the FAX image data 203
2'is also transmitted and received as a part of the FAX image data command 201 as indicated by reference numeral 202.

5.2 Communication Operation from Data Terminal Device to G3 FAX (Normal Communication) FIGS. 21 to 23 show data terminal device to G3 FAX.
It is a figure which shows the sequence of normal communication operation at the time of performing facsimile communication. The operation will be described below. Figure 21
23 to 23, when the DTE 2 transmits ENQ to the protocol conversion device 1 (2101) and receives ACK0 from the protocol conversion device 1 (2102), it transmits a message identification command indicating a transmission request including capability information of the terminal. (2103). Next, the protocol conversion device 1
ACK1 is received from (2104), and EO is received for it.
T is returned (2105) and the generation of the message is notified to the protocol conversion device 1.

On the other hand, after receiving the message identification command, the protocol conversion device 1 transmits a calling signal to the G3FAX3 (2106). Then, the G3FAX3 transmits the response signal, CED, CSI, and DIS of the G3FAX3 to the protocol conversion device 1 (2107, 210).
8, 2109, 2110). Next, the protocol conversion device 1 transmits DCS and TSI generated based on the capability information of the protocol conversion device 1 included in the message identification command and the DIS information of G3FAX3 (211).
1, 1122), negotiation is performed, and a training signal is transmitted (2113). Next, when the protocol conversion device 1 receives the CFR from the G3FAX3 (2114), it transmits ENQ to the DTE2 (211).
5), ACK0 is received (2116), and a data request command is transmitted (2117). Next, ACK1 is received (2118), and then EOT is transmitted (211).
9) Make a data transmission request. Then, DTE2
Sends ENQ to the protocol converter 1 (212
0), ACK0 is received (2121), and the FAX image data command including the FAX image data corresponding to the first block of the first page is transmitted (2122). On the other hand, when receiving the FAX image data command, the protocol conversion device 1 transmits ACK1 to the DTE2 (2123), extracts the FAX image data, and transmits the FAX image data to the G3FAX3 (2124). After that, DT
Similarly, E2 appropriately divides the FAX image data command and transmits it (2125, 2126, 2127, 212).
8) When transmission for one page is completed, EOT is transmitted (2129). The protocol conversion device 1 uses the FAX image data sent by dividing the FAX image data for one page.
It is edited into image data and sent to G3FAX3.

Next, the DTE 2 completes the transmission of the FAX image data for one page, and if there is the next page, E
NQ is transmitted to the protocol converter 1 (2130), and A
When CK0 is received (2131), a page identification command indicating that there is a next page is transmitted (2132). Next, ACK1 is received (2133), EOT is transmitted (2134), and the protocol conversion device 1 is notified that there is a next page. Then, the protocol conversion device 1
MPS is sent to G3FAX3 (2135), and G3FA
When MCS is received from X3 (2136), ENQ is transmitted to DTE2 (2135) and ACK0 is received (2
136), and transmits a data request command requesting the FAX image data of the next page (2137). Then AC
K1 is received (2138) and EOT is sent (213
9) Request the FAX image data of the next page from DTE2. On the other hand, in DTE2, when the data request command is received, ENQ is transmitted (2140), ACK0 is received (2141), and the FAX image data command including the FAX image data of the next page is transmitted (2142). ),
ACK1 is received (2143). In the present embodiment, this is the last block of the last page, so E
The OT is transmitted (2144). The protocol converter 1 extracts the FAX image data from the received FAX image data command and sends it to the G3FAX3 (2145).

Next, the DTE 2 transmits ENQ (21
45), ACK0 is received (2146), and the page identification command indicating that the transmission of the last page is completed is transmitted (2147). Then, ACK1 is received (214
8) The EOT is transmitted (2149) to notify the protocol conversion device 1 that the transmission of the FAX image data of the final block of the final page is completed. On the other hand, the protocol conversion device 1 transmits the EOP to the G3FAX3 (2150),
The MCF is received (2151). Next, the protocol converter 1 transmits / receives ENQ and ACK0 to the DTE2 (2152, 2153), transmits a message end log command (2154), and receives ACK1 (21
55), and EOT is transmitted (2156). Furthermore, the protocol conversion device 1 transmits a disconnection signal to the G3FAX3 (2157), receives the disconnection signal from the G3FAX3 (2158), and ends the processing. As described above, the communication operation from the data terminal device to the G3 FAX is performed.

5.3 Transmission Collision FIG. 24 shows that DTE2 and G3FAX3 simultaneously transmit
It is a sequence diagram which shows operation | movement when transmission collision occurs.
When the DTE 2 transmits ENQ to the protocol conversion device 1 (2401) and receives ACK0 from the protocol conversion device 1 (2402), it transmits a message identification command indicating a transmission request including the capability information of the terminal (240).
3). Next, ACK1 is received from the protocol conversion device 1 (2404), and EOT is returned to it (2404).
405), the generation of the message is notified to the protocol conversion device 1. On the other hand, at the same time, when G3FAX3 closes the loop and calls the protocol conversion device 1 (240
6 '), the protocol conversion device 1 recognizes the outgoing collision,
ENQ is transmitted to DTE2 (2408), ACK0 is received (2409), and a message end log command including information indicating a transmission collision is transmitted (2410). Next, ACK1 is received (2411), then EOT is transmitted (2412), and the DTE2 is notified that the transmission request from the DTE2 is rejected because of the transmission collision.

After that, when the second transmission occurs (24
06), the protocol conversion device 1 returns a response signal to the G3FAX3 (2407), CED, CSI, and DI.
Send S to G3FAX3 (2413, 2414, 2
415). On the other hand, G3FAX3 returns DCS and TSI (2416, 2417). In this way, both terminals negotiate, the capabilities of the terminals are identified, and a training signal is transmitted (2418). The following sequence performs the same processing as the sequence of normal communication operation in the case of performing facsimile communication from the G3 FAX to the data terminal device described in FIGS. 17 to 19. In this way, the processing sequence in the case of a transmission collision is performed.

5.4 Abandonment of data terminal device midway FIG. 25 shows that DTE2 fails during communication of FAX image data between DTE2 and G3FAX3.
It is a processing sequence when the DTE 2 abandons the transmission. While DTE2 is transmitting FAX image data to G3FAX3 (2501 to 2507),
When some failure occurs in DTE2 (2509), D
The TE2 sends an alarm EOT to the protocol conversion device 1 (2508). Next, when the DTE 2 transmits ENQ to the protocol conversion device 1 (2510) and receives ACK1 from the protocol conversion device 1 (2511), it transmits a message midway abandonment command including information indicating that a failure has occurred (2512). ). Next, ACK0 is received from the protocol conversion device 1 (2513), EOT is returned to it (2514), and the protocol conversion device 1 is notified that a failure has occurred in the DTE2. Then, the protocol conversion device 1 transmits ENQ to DTE2 (2515), receives ACK1 (2516), and transmits a message end log command including information indicating midway abandonment (2517). Then ACK0 is received (2
518), then send EOT (2519), DT
The E2 is notified that the transmission request from the DTE2 is rejected because of a transmission collision, the disconnect signal is transmitted to the G3FAX3 (2520), the disconnect signal is received from the G3FAX3 (2521), and the communication processing is ended. To do.

FIG. 26 shows a processing sequence in the case where the DTE 2 fails during the pre-procedure for transmitting FAX image data between the DTE 2 and the G3 FAX 3, and the DTE 2 abandons the transmission. is there. In FIG. 26, when the DTE 2 and the G3 FAX 3 perform the pre-procedure for transmitting FAX image data via the protocol conversion device 1 (2601 to 2614), the protocol conversion device 1 requests the DTE 2 for data transmission ( 261
5 to 2619), if a failure occurs on the DTE2 side (2620), the DTE2 notifies the protocol conversion device 1 that the failure has occurred on the DTE2 (2621 to 262) as in the sequence described in FIG.
5), the communication processing ends (2626 to 263).
2). In this way, the processing sequence in the case of abandoning during transmission is performed.

5.5 G3 FAX No Response FIG. 27 is a diagram showing a processing sequence when the G3 FAX does not respond. In FIG. 27, the DTE 2 makes a transmission request to the protocol conversion device 1 (2701 to 271).
05), and accordingly, the protocol conversion device 1
A calling signal is transmitted to AX3 (2706). At this time, if there is a paper out, not in automatic call reception mode, fax trouble, etc.,
If G3FAX3 does not respond to the protocol converter 1,
After a predetermined time has passed, the protocol conversion device 1 determines that it has timed out (2707), sends ENQ to the DTE2 (2708), receives ACK0 (2709), and sends a message end log command including information indicating no response. Send (2710). Then, ACK1 is received (271
1), then send EOT (2712), DTE2
To G3FAX3, the G3FAX3 makes a notification of refusing the transmission because there is no response. In this way, the processing sequence when the G3 FAX does not respond is performed.

5.6 G3 FAX Out of Paper FIG. 28 is a diagram showing a processing sequence when G3 FAX 3 is out of paper. In FIG. 28, DTE2 and G3F
If the FAX image data is normally communicated with the AX3 (2801 to 2807) and then the FAX image data of the next page is present, the DTE 2 confirms that the protocol conversion device 1 has the next page. The page identification command shown is transmitted (2808 to 2812). Then,
The protocol conversion device 1 transmits the MPS to the G3FAX3 (2813), but when receiving the procedure interruption affirmative signal (PIP) indicating that the paper has run out from the G3FAX3 (2814),
ENQ is transmitted to DTE2 (2815), ACK1 is received (2816), and a message end log command including information indicating that G3FAX3 is out of paper is transmitted (2817). Then, ACK0 is received (281
8), EOT is transmitted (2819), and further, the protocol conversion device 1 transmits a disconnection signal to G3FAX3 (282).
0), receiving the disconnection signal from G3FAX3 (282
1) End the process. In this way, the processing sequence when G3FAX3 runs out of paper is performed.

5.7 FAX Procedure Error FIG. 29 and FIG. 30 show protocol conversion device 1 and G3F.
It is a processing sequence when a FAX procedure error occurs with AX3. In FIG. 29, if an error occurs during the pre-FAX procedure between the protocol conversion device 1 and the G3FAX3 (2901 to 2906), the protocol conversion device 1 sends a disconnection signal to the G3FAX3 (290
7), receiving the disconnection signal from G3FAX3 (290
8), the processing sequence ends. In FIG. 30, when an error occurs during transmission of fax image data between the protocol conversion device 1 and the G3FAX3 (3001 to 3005) (3007), the protocol conversion device 1 causes the D3
An alarm EOT is transmitted to TE2 (3006).
Next, ENQ is transmitted to DTE2 (3008), and AC
Upon receiving K0 (3009), a message end log command including information indicating a procedure error is transmitted (3010). Then, ACK1 is received (301
1), the EOT is transmitted (3012), and the protocol conversion device 1 further transmits a disconnection signal to the G3FAX3 (301).
3), receiving the disconnection signal from G3FAX3 (301
4), the process ends.

5.8 Procedure Error Between Data Terminal Device and Protocol Conversion Device FIGS. 31 to 33 show a processing sequence when a procedure error occurs between the data terminal device and the protocol conversion device. In FIG. 31, the protocol conversion device 1 and G
3 FAX 3 and FAX pre-procedure are normally performed (310
1 to 3109), the protocol conversion device 1
ENQ is transmitted to E2 (3110). On the other hand, D
TE2 returns ACK0 (3111), but if it cannot return due to some trouble, it retries. Here, if the timeout occurs and the retry occurs (3112), the protocol conversion device 1 determines that the G3FAX3
The disconnection signal is sent to (3114), the disconnection signal from the G3FAX3 is received (3115), and the process ends. Therefore, the FAX image data transmission (3113) is invalid.

In FIG. 32, during the normal transmission of FAX image data (3201 to 320)
5) When the protocol converter 1 becomes unable to send a message to the DTE 2 (3206), a retry is performed. At this point, if the time-out occurs and the retry occurs (3207), the protocol conversion device 1 determines that the G3F
A disconnection signal is sent to AX3 (3208), and G3FAX3
The disconnection signal from is received (3209), and the process ends. In FIG. 33, the protocol conversion device 1 is the DTE 2
A message transmission request was made from and the ENQ was received (330
1), ACK0 which is a response signal to this is returned, but if it cannot be transmitted due to some trouble, retry is performed. Here, when it becomes a retry over (330
3) Then, it times out, the link to G3FAX3 is released (3304), and the process is terminated. As described above, the processing sequence when the procedure error occurs between the data terminal device and the protocol conversion device is performed.

5.9 Log Data Output FIG. 34 shows a processing sequence when the log data (communication failure data, etc.) stored in the protocol conversion device 1 is output. First, a command is input to DTE2 (3
401), when a request for log data output is made, the DTE
2 sends ENQ to the protocol converter 1 (340
2), ACK0 is received (3403), and an adapter log request command indicating a log data output request is transmitted (3404). Then, ACK1 is received (271
1) After that, the EOT is transmitted (2712) to request the protocol conversion device 1 to output the log data.

On the other hand, the protocol conversion device 1 extracts the log data table T34 stored in the temporary storage device and sends it to the DTE 2. To explain this, first, D
ENQ is transmitted to TE2 (3407), ACK0 is received (3408), and a predetermined number of bytes of log data is added to the adapter log data command and transmitted to DTE2 (3409). Then, ACK1 is received (341
0), EOT is transmitted (3411), and log data of one block (block A) is transmitted to DTE2. Then, in DTE2, print it out (P34
A) and output log data. Next, similarly, all log data stored in the log data table is divided into a plurality of blocks and transmitted to the DTE 2 (3412 to 312).
421), DTE2 prints them out sequentially (P
34B, P34n), output all log data, and terminate the process.

The log data is the protocol conversion device 1
Can be output to. This will be described with reference to FIG. In FIG. 35, when the operator operates the test effective switch 101-15 of the panel 101, the key-in information 3502 is read by the control program 3501. Next, the control program 3501 accesses the log data table T34 to display the log data in the indicator 1
It is displayed on 01-10 and the log data is output. As described above, the log data can be output to either the DTE 2 or the protocol conversion device 1.

[0053]

As described above, according to the present invention, G
3FAX and a data terminal device such as a personal computer can be easily connected via a protocol conversion device,
Facsimile communication can be mutually enabled between the G3 FAX and the data terminal device.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of the present invention.

FIG. 2 is an external view of a protocol conversion device.

FIG. 3 is an external view of a protocol conversion device.

FIG. 4 is a diagram showing a panel of a protocol conversion device.

FIG. 5 is a hardware configuration diagram of a protocol conversion device.

FIG. 6 is a configuration diagram of a network control circuit of the protocol conversion device.

FIG. 7 is a diagram showing a rosette code for connecting a protocol conversion device and a G3 facsimile.

FIG. 8 is a diagram illustrating interface conditions between a protocol conversion device and a data terminal device.

FIG. 9 is a diagram illustrating interface conditions between a protocol conversion device and a G3 facsimile.

FIG. 10 is a diagram illustrating a connection state between a protocol conversion device and a modem.

FIG. 11 is a diagram showing a format of an information block transmitted / received between a protocol conversion device and a data terminal device.

FIG. 12 is a diagram illustrating a character used in the format of the information block shown in FIG. 11.

13 is a diagram illustrating command names used in the format of the information block shown in FIG. 11 and their meanings.

FIG. 14 is a diagram illustrating control signal names used in a communication protocol between a protocol conversion device and a data terminal device and their meanings.

FIG. 15 is a diagram for explaining the operation of the protocol conversion device.

FIG. 16 is a diagram for explaining the operation of the protocol conversion device.

FIG. 17 is a diagram showing a processing sequence performed by the data terminal device and the G3 facsimile via the protocol conversion device.

FIG. 18 is a diagram showing a processing sequence performed by the data terminal device and the G3 facsimile via the protocol conversion device.

FIG. 19 is a diagram showing a processing sequence performed by the data terminal device and the G3 facsimile via the protocol conversion device.

FIG. 20 is a diagram illustrating an outline of facsimile communication performed by a data terminal device and a G3 facsimile via a protocol conversion device.

FIG. 21 is a diagram showing a processing sequence performed by the data terminal device and the G3 facsimile via the protocol conversion device.

FIG. 22 is a diagram showing a processing sequence performed by the data terminal device and the G3 facsimile via the protocol conversion device.

FIG. 23 is a diagram showing a processing sequence performed by the data terminal device and the G3 facsimile via the protocol conversion device.

FIG. 24 is a diagram showing a processing sequence in the case of a transmission collision.

FIG. 25 is a diagram showing a processing sequence when a failure occurs.

FIG. 26 is a diagram showing a processing sequence when a failure occurs.

FIG. 27 is a diagram showing a processing sequence when there is no G3 facsimile response.

FIG. 28 is a diagram showing a processing sequence when a G3 facsimile paper is out.

FIG. 29 is a diagram showing a processing sequence when a procedure error occurs between the G3 facsimile and the protocol conversion device.

FIG. 30 is a diagram showing a processing sequence when a procedure error occurs between the G3 facsimile and the protocol conversion device.

FIG. 31 is a diagram showing a processing sequence when a procedure error occurs between the protocol conversion device and the data terminal device.

FIG. 32 is a diagram showing a processing sequence when a procedure error occurs between the protocol conversion device and the data terminal device.

FIG. 33 is a diagram showing a processing sequence when a procedure error occurs between the protocol conversion device and the data terminal device.

FIG. 34 is a diagram showing a processing sequence when the log data stored in the protocol conversion device is output.

FIG. 35 is a diagram showing another embodiment for outputting log data stored in the protocol conversion device.

[Explanation of symbols]

 1 ... Protocol conversion device 2 ... Data terminal device 3 ... G3 facsimile 4, 5 ... Line 6, 7 ... Modem

Claims (1)

[Claims] 1. A protocol conversion device for converting a facsimile communication procedure into a bisync communication procedure, wherein a unit for generating one identification message based on the destination information obtained in the facsimile pre-procedure, and a plurality of blocks of FAX image data. 1. A protocol conversion device comprising: a unit for dividing the above into a plurality of facsimile telegrams, and a unit for generating a control telegram corresponding to a facsimile signal.