JP3427605B2 - Facsimile machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to a facsimile machine suitable for shortening a post message procedure.

[0002]

2. Description of the Related Art In a conventional facsimile apparatus, while transmitting image information at a high speed of 14.4 Kbps, for example,
Control signals other than image information are transmitted at a low speed of about 300 bps. Since the control signal is transmitted at a low speed in this way, there is a problem that the protocol procedure becomes long. To date, various proposals have been made to shorten the protocol procedure. 20, 21, and 22 are diagrams showing a command sequence of a data communication device such as a facsimile device that attempts to shorten the protocol procedure.

In the first device whose sequence is shown in FIG. 20, an MPS (multi-page) signal is assembled into a transmission frame and the MPS signal is inserted between one unit of image information (PIX). Then, the protocol period is shortened by transmitting this MPS signal at a high speed like image information. This device is described in JP-A-62-39964.

In the second device whose sequence is shown in FIG. 21, MPS is transmitted at high speed similarly to image information, and
A constant frequency signal outside the frequency band of the control signal such as the MPS is transmitted to detect a low frequency signal from the partner device. It is possible to send a plurality of pages of image information without switching the modem speed while confirming the positive response from the receiving side for each frame by this constant frequency signal. This device is described in JP-A-3-120954.

The third device whose sequence is shown in FIG. 22 is to reduce the time required for the protocol procedure in the error retransmission mode. After the image information frame, a post is performed instead of the RCP (partial page control return) signal. The message command PPS-EOP is transmitted three times in succession. In this way, since the PPS-EOP is transmitted at the same high speed as the image information frame, the procedure after image information transmission can be shortened. This device is described in Japanese Patent Laid-Open No. 5-219335.

[0006]

The facsimile apparatus described in the above publication has the following problems. First, the first device does not take any measures against a transmission error of MPS. Although this point is improved in the second device, the second device requires a special function for receiving and detecting a constant frequency signal.

In the third device, RCP is set to PPS-.
Since it is replaced with EOP, there are the following problems. That is, in ECM (error correction mode), RCP
Is a command for switching from high speed to low speed, so normally, the receiving side performs processing for switching the modem to low speed by receiving RCP. However, in the third device, RCP
Since PPS-EOP is replaced with PPS-EOP, there is a problem that the modem cannot be switched to a low speed unless the existing transmission / reception configuration is changed significantly.

Further, all the first to third devices are
If the stop key is pressed during image information transmission, transmission cannot be interrupted immediately. That is, generally, when the stop key is pressed and interruption is required, the RCP is transmitted, and the DCN (line disconnection signal) is transmitted without waiting for the other party's response to disconnect the line. However, for example, in the third device, RC
Since P is replaced with PPS-EOP, there is a problem in the existing configuration that transmission cannot be interrupted even if the stop key is pressed.

In view of the above problems, the present invention shortens communication time by transmitting a post message command at high speed, and promptly interrupts communication when a communication interrupt request is received during transmission of image information. It is an object of the present invention to provide a facsimile device that can be used.

[0010]

SUMMARY OF THE INVENTION To solve the above problems and achieve the object, the present invention provides transmitting means for transmitting image information and protocol signals to a line, and RC having a FIF.
RCP frame generation means for generating a P frame, input means for instructing communication interruption, and interruption request detection means for detecting a communication interruption instruction input by the input means and outputting a detection signal are provided. The first characteristic is that the frame generating means is configured to describe DCN in the FIF of the RCP frame in response to the detection signal and output the DCN to the transmitting means.

Further, in the present invention, the RCP frame generation means is responsive to the FI of the RCP frame in response to the detection signal.
A second feature is that a code scheduled to indicate communication interruption is described in F and is output to the transmitting means.

According to the first and second characteristics, since the post message can be described in the FIF and transmitted, the protocol procedure can be shortened, and when a communication interruption instruction is given, it can be immediately responded to. .

The present invention also includes an RCP frame detection means for detecting an RCP frame, an analysis means for analyzing the FIF of the detected RCP frame and determining whether or not information indicating communication interruption is described. A third feature is that the analyzing unit includes a line releasing unit that releases a line when it is determined that the RCP frame contains information indicating communication interruption.

A fourth feature of the present invention is that the RCP frame includes registration means for registering the information indicating the interruption of communication when the information is included in the RCP frame.

According to the third and fourth characteristics, when the information included in the RCP frame, which indicates the interruption of communication, is received, the line can be opened to interrupt the communication. In particular, according to the fourth feature, since information indicating communication interruption is registered, it is possible to confirm that the interruption of communication is due to an operator's instruction by analyzing this information later.

[0016]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings. FIG. 3 is a block diagram showing the overall configuration of the facsimile apparatus according to the embodiment of the present invention. This facsimile device includes a CPU 1 for controlling the entire facsimile device, a RAM 2 as a work area used when executing a control program, an operation display device 3 provided with a display screen and operation switches for operating the facsimile device, and a transmission document. A reading device 4 for reading an image, a printing device 5 for printing and outputting received image information, an image processing device 6 for performing image processing such as encoding / decoding / enlarging / reducing, image information to be transmitted or received image information. An image storage device 7 to be stored, a system control unit 8 including a ROM storing a program for controlling the entire facsimile device, a program for controlling communication (G4, etc.) suitable for a digital network (ISDN network, etc.) First composed of stored ROM
Communication controller 9, a second communication controller 10 including a ROM storing a program for controlling communication suitable for an analog network (G3, etc.), and a digital network controller 11 for connecting to a digital network. , And a line switching control unit 15 for connecting a plurality of external line interfaces and a plurality of internal communication circuits by switching, and these are connected to each other by a system bus 14.

The first communication control unit 9 is directly connected to the line switching control device 15, and the second communication control unit 10 is connected to the line switching control device 15 via a modem 12 having a low speed mode and a high speed mode. Has been done. The line switching controller 15 is further connected to the digital network controller 11 and the analog network controller 13.

The facsimile device having the above-described structure is connected to a partner device such as a facsimile device having the same structure as the facsimile device, a facsimile device connectable only to an analog network, and a facsimile device connectable only to a digital network via a line. .
When the facsimile machine is connected only to the analog network, the first communication controller 9 and the digital network controller 1
1 can be omitted, and the second communication control unit 10, the modem 12, and the analog network control device 13 can be omitted when connecting only to the digital network.

Next, a communication procedure according to the shortened protocol will be described. First, the transmission protocol will be described. Figure 4
Is a general flow chart of transmission. In the figure, in step S1, a call is made in accordance with the telephone number input from the operation display device 3. When the telephone number is previously stored in the RAM 2 as a speed dial, the speed dialed number is read to make a call. In steps S2 and S3, the RAM 2 is searched to determine whether the capability of the partner machine registered corresponding to the speed dial stores the speed reduction protocol reception capability. The capability of the partner machine can be registered in advance, or can be registered according to the result of the protocol procedure. The following follows the procedure when registering according to the result of executing the protocol procedure.

Therefore, step S3 is initially negative, and the process proceeds to step S4 to send out a CNG (ring tone). While transmitting CNG, in step S5, the reception of a CED (callee identification) signal or some command is awaited. If the command is received, the process proceeds to step S6,
Whether or not NSF (non-standard function signal) is received is determined. NS
If F is received, the process proceeds to step S7, and it is determined whether this NSF is the same model as the own device. If it is determined that the model is the same as the own device, the process proceeds to step S8, and it is determined whether or not the reception capability of the shortened protocol (shown as "short professional" in the figure) is present,
If there is a shortened protocol reception capability, the process proceeds to step S9,
“Abbreviated protocol reception capability” is registered in the RAM 2 in correspondence with the speed dial. If the partner functional capability is registered, the process proceeds to the transmission phase B of step S14. Details of the transmission phase B will be described later with reference to FIG.

If the NSF is not received, if the NSF is not the same model as the own machine even if the NSF is received, or if the partner machine does not have the shortened protocol receiving capability, that is, the determinations in steps S6 to S8 are negative. If step S
The process proceeds to step 10 to register "no abbreviated protocol receiving capability" in the RAM 2 in correspondence with the abbreviated dial. When the partner functional capability is registered, the process shifts to the normal transmission mode of step S11, that is, the transmission mode that is not the shortened protocol.

If it is registered that the partner machine has the capability of receiving the shortened protocol, the determination in step S3 becomes affirmative, and the process proceeds to the transmission phase A in step S12. Details of the transmission phase A will be described later with reference to FIG.

In step S13, it is determined whether the transmission is in the shortened protocol mode or the normal transmission. This is determined by the execution result of the transmission phase A (step S12).
If normal transmission, the process proceeds to step S6. If the transmission is in the shortened protocol mode, the transmission phase B in step S14
Proceed to. If the transmission phase B has been executed, step S
In step 15, it is determined again based on the execution result of the transmission phase B (step S14) whether or not the transmission is in the shortened protocol mode. If it is the shortened protocol mode, step S16.
And the transmission phases C and D are executed in step S17. In step S18 and step S19,
Based on the execution result of the transmission phase D, it is determined whether to proceed to the transmission phases C and B, respectively. When the process does not proceed to the transmission phase C or B, that is, when the process shifts to the phase E, low-speed DCN is transmitted in step S20 and the transmission is ended.

Next, the transmission phase A will be described. In FIG. 5, in step S21, it is determined whether or not the polarity reversal detection function is provided. If the polarity reversal detection function is provided, the CNG transmission start timer is started in step S22, and it is determined whether or not the polarity reversal is detected in step S23. If the polarity reversal is detected, the process proceeds to step S29 to shift to the shortened protocol mode. The polarity reversal is detected until the timer times out (step S24),
If the time is out, the process proceeds to step S25 and CNG.
Send (ring tone). In step S26, it is determined whether polarity reversal has been detected. If the polarity reversal is detected, the process proceeds to step S29 to shift to the shortened protocol mode. If no polarity reversal is detected, step S2
Proceed to step 7 to determine whether or not CED (callee identification) has been received. If the CED is received, the process proceeds to step S29,
Switch to shortened protocol mode. If the CED is not received, the process proceeds to step S28 and it is determined whether or not a low speed command such as NSF / DIS is received. If the low speed command is not received, the process proceeds to step S25. If the low speed command is received, the process proceeds to step S33 to shift to the normal transmission mode.

On the other hand, if it is determined in step S21 that the polarity reversal detection function is not provided, the process proceeds to step S30 and C
Send NG (ringing tone). CED in step S31
Whether or not to receive is determined. If the CED is received, the process proceeds to step S29 to shift to the shortened protocol mode.
If the CED is not received, the process proceeds to step S32 and it is determined whether or not the low speed command is received. If the CED is received, the process proceeds to step S33 to shift to the normal transmission mode. If the CED is not received, the process proceeds to step S30.

As described above, in the transmission phase A, when the polarity reversal or the CED is detected, the mode immediately shifts to the shortened protocol mode.

Next, the transmission phase B will be described. In FIG. 6, it is determined whether polling is performed in step S34,
In the case of polling, the procedure of steps S44 to S52 is executed. If it is not polling, the process proceeds to step S35 and a predetermined single tone is transmitted. This single tone is
This is a signal indicating the transmission speed of the high-speed NSS (non-standard function setting) transmitted in step S36. In step S36, high-speed NSS of 9600 bps, for example, is transmitted.

In step S37, it is determined whether or not there is a response from the partner machine to the NSS. If there is a response, the process proceeds to step S38 and the response is high-speed NS.
Judge whether it is F (non-standard function). If the high-speed NSF is received, the process proceeds to step S39 to shift to the shortened protocol mode. If the high-speed NSF is not received, that is, if it is a low-speed command, the process proceeds to step S40 and shifts to the normal transmission mode.

If it is determined in step S37 that the response has not been received, the process proceeds to step S41, in which it is determined whether polarity reversal has been detected. If polarity inversion is not detected, the process proceeds to step S43, the fallback parameter is set, and the process proceeds to step S35. When the polarity reversal is detected, the process proceeds to step S42 and the initial value of the transmission speed is reset so that the communication can be performed at the highest speed. Therefore, the speed once reduced by the fallback in step S43 is returned to the high speed.

In the case of polling, steps S44 to S44
Execute 52. The steps S44 to S51 have almost the same contents as the steps S34 to S38 and S40 to S43 except for the procedure for reception, and the description thereof will be omitted. In step S52, a reception phase B (FIG. 10) described later is executed.

Next, the transmission phase C will be described. In this transmission phase C, the frame is divided into frames by ECM (error correction), and the first frame (frame No. 0) is divided into
Parameter or NSS information indicating image information of the second and subsequent frames following the first frame is set, and image information is set and transmitted in the second and subsequent frames.

In FIG. 7, first, in step S53, it is determined whether or not the image information is retransmitted. In the case of resending, in step S54 the image information to be resent is set in the frame and sent out. In step S55, it is determined whether or not the retransmission is completed. If the retransmission is completed, the process proceeds to step S59. If the image information is not retransmitted, that is, if it is the first transmission, the process proceeds to step S56 and the frame No. The NSS information is set to 0 and transmitted. This NSS information is finally determined based on the result of the negotiation with the other device, and may be the contents of the NSS sent in step S36 previously, or changed depending on the result of the negotiation. In some cases. Since the NSS is sent in step S36, at least the document size and the image quality information may be included here. In step S57, the second and subsequent frames, that is, frame numbers. Image information is set after 1 and transmitted. In step S58, it is determined whether or not the transmission of all the image information is completed, and if it is determined that the transmission is completed, the process proceeds to step S59. In step S59, the contents of the post message command are set in the facsimile information field (FIF) of the RCP and transmitted, and the process proceeds to the response command reception waiting phase (transmission phase D). The frame structure of RCP will be described later with reference to FIGS.

Next, the transmission phase D will be described. In FIG. 8, in step S60, it is determined whether or not a response has been received. If no response is received, step S6
1 and proceed to the low speed post message command (PPS
Q or PPS / Pri-Q). If a response is detected, the process proceeds to step S62, and it is determined whether the content of the response is a low-speed MCF (message confirmation signal). If the low-speed MCF is received, the process proceeds to step S76. On the other hand, if the response is not the low-speed MCF, the process proceeds to step S63 to determine whether the response is the low-speed PPR (partial page request). If this determination is negative, the process proceeds to step S64 and it is determined whether or not the response is a low-speed PIP (procedure interruption positive). PI
If P is detected, the line hold procedure is executed in step S65 and the process proceeds to step S76. If the response is neither low-speed MCF, PPR, nor PIP, it is determined that an error has occurred and the process proceeds to step S66 to perform error processing.

When the low-speed PPR is received, the process proceeds from step S63 to step S67 and it is determined whether or not CTC (continuation of correction) needs to be transmitted. If necessary, the process proceeds to step S68 and the low speed CTC is transmitted. This is performed until a low-speed CTR (correction continuation response) is received in step S69. Then, if the low-speed CTR is received, the process proceeds to phase C.

If it is determined in step S67 that CTC transmission is unnecessary, it is determined in step S71 whether EOR (retransmission end) transmission is necessary. If it is not necessary to send EOR, the process proceeds to step S76. If the EOR needs to be sent, the process proceeds to step S72, and the low-speed EOR is sent.
In step S73, it is determined whether or not a low speed ERR (retransmission end response) is received. If a low speed ERR is received, the process proceeds to step S76. If the low speed ERR is not received, it is determined whether or not a low speed PIN (procedure interruption negative) is received. This judgment is based on ITU-T recommendation T.264. When the T4 timer times out by sending EOR three times as defined in the procedure of No. 30, DCN (line disconnection command) is sent to disconnect the line. When the low-speed PIN is received, the process proceeds to step S75 and the line hold procedure is performed.

In step S76, the next phase to shift to is determined based on the post message command sent in step S59 (transmission phase C). Based on this determination, the process proceeds to steps S77, S78, S79, and shifts to phases C, D, E.

Next, the reception protocol will be described.
FIG. 9 is a general flow chart of reception. In the figure, in step S80, the presence or absence of an incoming call is determined, and if there is an incoming call, the process proceeds to step S81 to start a 1.8-second timer. This timer is based on ITU-Recommendation T.264. Thirty
Are defined in. In step S82, it is determined whether or not a signal instructing the transition to the shortened protocol mode, that is, a single tone indicating the transmission speed of the high-speed NSS is received. When the signal is received, the mode is changed to the shortened protocol mode (transition case 1). In step S83, the reception phase B (FIG. 10) is executed. Following reception phase B, reception phase C of step S84 (see FIG.
1) is executed, and the reception phase D (FIG. 12) is executed in step S85. In step S86, it is determined whether to proceed to phase C, and in step S87, it is determined whether to proceed to phase B. If the determination in step S86 is affirmative, the process proceeds to step S84, and if the determination in step S87 is affirmative, the process proceeds to step S83. Phase C,
If it does not shift to any of B, the process proceeds to step S88, the low speed DCN is received, and the communication is ended.

If no signal is received in step S82, it is determined whether or not CNG is received in step S89. If CNG cannot be received, the determinations in steps S82 and S89 are repeated until it is determined in step S90 that a timeout has occurred. When CNG is received or when time-out occurs, the process proceeds to step S91 and CED is transmitted. In step S92, it is determined whether or not a signal instructing the shift to the shortened protocol mode has been received.
If the signal instructing the shift to the shortened protocol mode is received, the process proceeds to step S93 to stop the CED transmission, shifts to the shortened protocol mode (shift case 2), and proceeds to step S83.

If the signal cannot be received in step S92, the process proceeds to step S94 to determine whether or not the CED transmission is completed. When the CED transmission is completed, step S
Proceed to 95 to send NSF / DIS. Step S9
At 6, it is judged whether or not a signal instructing the shift to the shortened protocol mode is received. If the signal instructing the shift to the shortened protocol mode is received, the shift to the shortened protocol mode (shift case 3) is performed and the process proceeds to step S83. If the signal is not received, the process proceeds to step S97 and the normal operation is performed. Move to receive mode.

Next, the reception phase B will be described. Figure 10
In step S98, it is determined whether or not a high speed NSS is received. If the high speed NSS is received, the process proceeds to step S99, and the high speed NSF is transmitted. If the high speed NSS is not received from the transmitter, the process proceeds to step S100 to determine whether or not the high speed NSC is received. This is to determine whether or not to execute polling by the shortened protocol. Thus, steps S98 and S100 are repeated until the high speed NSS or the high speed NSC is received. When the determination in step S100 is affirmative, it is determined in step S101 whether or not poled preparation is completed. If it is ready, the process proceeds to step S102, and the transmission phase B (FIG. 6) is executed to transmit the document. If the poled preparation is not completed, a predetermined error procedure is executed in step S103, and the process ends.

Next, the reception phase C will be described. In the reception phase C, the image information sent by dividing the frame into ECM frames is received. In the frame structure, a parameter indicating image information is set in the first frame (frame No. 0), and image information is set in the second and subsequent frames.

In FIG. 11, in step S104, F
It is determined whether a CD (facsimile coded data) frame, that is, an image information frame is received. If this determination is affirmative, the process proceeds to step S105, and the frame No. 0, that is, it is determined whether the NSS of the first frame is received. If the first frame is received, the determination in step S105 becomes affirmative, and the NSS is analyzed in step S106. If the first frame is not received, it is determined that the second and subsequent frames, that is, the frames of the image information have been received, and the process proceeds to step S107, and the received image information is stored in the image storage device 7. In step S108, it is determined whether or not the reception of the frame is completed, and the process proceeds to step S104 until this determination is affirmative. If the step S108 is not positive and the reception of the FCD frame is completed, it means that there is an RCP frame in the last frame, and the process proceeds to step S109 to analyze the post message command of the RCP frame. When the analysis of the post message command or the reception of the frame is completed, the reception phase C
Exit through.

Next, the reception phase D will be described. 12
In step S110, it is determined whether RCP is received. When the process shifts to this phase D without receiving the RCP, the process proceeds to step S111 to wait for the low speed command. When the RCP is received or when the low speed command is received, the process proceeds to step S112, and it is determined whether or not the received FCD frame has an error.
If there is no error in the FCD frame, step S113
In step S114, the line hold procedure is executed if the determination is affirmative. If not line hold, step S115
Then, the low-speed MCF is transmitted, and the routine proceeds to step S124.

If there is an error in the FCD frame, the flow advances to step S116 to send out a low-speed PPR (partial page request). In step S117, it is determined whether the CTC is received. If the CTC is received, the process proceeds to step S118, and the low speed CTR is transmitted. If the CTC is not received, the process proceeds to step S119, and it is determined whether or not the EOR is received. If no EOR is received, the process proceeds to phase C. If the EOR is received, the process proceeds to step S121, it is determined whether or not the line hold is performed,
If this determination is affirmative, the line hold procedure is executed in step S122. If it is not the line hold, the process proceeds to step S123, the low speed ERR is transmitted, and the step S
Proceed to 124. In step S124, the phase to shift to next is determined based on the received post message command. Based on this determination, steps S125 and S12
6, it progresses to S127 and transfers to phases C, D, and E.

13 and 14 are sequence diagrams of the above-mentioned protocol procedure. FIG. 13A shows a sequence in the case of detecting polarity reversal and shifting to the shortened protocol mode. In the figure, “signal” is a signal indicating the transition to the shortened protocol mode, and the RCP frame (PP
SMPS) indicates that the post message command PPSMPS is set in the RCP frame.
The frame (PPS-EOP) indicates that the post-message command PPS-EOP is set in the RCP frame. The FCD frame (PIX) indicates that the image information PIX is set in the FCD frame, and the EPT is I
TU-T Recommendation V.3 27 ter, V.I. 29 (optio
n), V. 17 shows an unmodulated carrier defined in 17 etc.

FIG. 13B shows a sequence for detecting CED before detecting polarity inversion and shifting to the shortened protocol mode. FIG. 14 shows the case where the reception capability of the shortened protocol mode is not stored in the registered content of the capability of the partner device, and after the reception capability of the shortened protocol is judged by the NSF command from the partner device, the mode is switched to the shortened protocol mode. The following shows the sequence when doing. 13,
In FIG. 14, the sequence after the transition to the shortened protocol mode, that is, after the step of transmitting the “signal” from the transmitting side is common.

FIG. 15 is a diagram showing details of the transmission frame. In the figure, the FCD frame No. NS is 0
C to describe the frame number. 1 to No. In N, image information (PIX) is described. And frame N
o. Post message command (PP
S / EOP information).

Details of the post message command are shown in FIG.
Shown in. FIG. 16A shows a normal RCP frame, and FIG. 16B shows an RCP frame of this embodiment. As shown in the figure, a normal RCP frame is composed of a flag field F, an address field A, a control field C, a partial page return RCP, a frame check sequence FCS, and a flag field F. On the other hand, in the RCP frame of this embodiment,
A FIF is provided, and the post message command is described here. In addition, reference numeral P. No is the page number, B. No
Is the block number, F.I. No indicates the frame number.

Next, the procedure when the stop key is pressed during the transmission of the document will be described. FIG. 17 is a flow chart showing the procedure when the stop key is pressed during document transmission on the transmitter side. In the figure, step S130-
Since S134 and S136 and S137 are the same as the transmission phase C in FIG. 7, description thereof will be omitted. In step S135, it is determined whether or not there is a suspension request. This determination is made based on whether or not a preset stop key on the operation display device 3 has been pressed. If the stop key is not pressed, the process proceeds to step S136, and if the stop key is pressed, the process proceeds to step S138. In step S138, DCN is described in the FIF of the RCP frame and transmitted.
Open the line. Instead of the DCN, a code that means “interruption” that has been agreed in advance may be described and transmitted. FIG. 19A shows an RCP frame describing DCN, and FIG. 19B shows “STO” meaning “interruption”.
It is a figure which each shows the structure of the RCP frame which described the "P" code. In addition, depending on the STOP code, this ST
It is possible to inform the partner machine that the transmission is interrupted by the content of the OP code, that is, the operation of the operator. Further, an error code indicating the error content may be added to the STOP code (FIG. 19 (c)).

Next, the procedure on the receiver side including the procedure for detecting the DCN or STOP code will be described. FIG.
In the above, steps S140 to S145 are the same as the reception phase C in FIG. 11, so description thereof will be omitted. If it is determined in step S146 that a normal post message command has been received based on the result of analyzing the RCP frame post message command in step S145, the flow exits this flow and proceeds to reception phase D. If the normal post message command is not received, the process proceeds to step S147, the DCN or STOP code is received, and the line is released. After opening the line,
The meaning of the STOP code, that is, the interruption of the transmission due to the operation of the operator of the partner machine may be registered in the RAM 2, or the content may be recorded in the communication log or the like by the error code.

Next, the functions necessary for interrupting the above communication will be described with reference to the block diagram. In FIG. 1, the function on the transmitter side will be described. When the stop key 16 of the operation display device 3 is operated by the operator, the interruption request detection unit 17 outputs a detection signal in response to the operation. The detection signal is sent to the code storage unit 18, the RCP frame generation unit 19, and the line release unit 21. Code storage unit 18
Outputs data corresponding to the planned STOP code or DCN to the RCP frame generation unit 19 in response to the detection signal. When the detection signal is supplied, the RCP frame generation unit 19 describes the STOP code or DCN in the FIF of the RCP frame based on the code or data and outputs it to the transmission unit 20. The transmitter 20 uses this RCP
Send the frame to the line. The line opening unit 21 opens the line when it detects that an RCP frame has been sent to the line after the detection signal is input.

Next, the functions on the receiver side corresponding to the functions on the transmitter side will be described. In FIG. 2, the RCP frame detection unit 22 monitors the image information frame from the partner machine, and when detecting the RCP frame, the RCP frame is analyzed by the command analysis unit 23. When the RCP frame includes the STOP code or DCN, the line opening unit 24 is activated to open the line. R
When the CP frame includes the STOP code, the content of the STOP code is registered in the registration unit 25 after the line is opened.

[0053]

As is clear from the above description, according to the invention of claim 1 or 2, the F of the RCP frame is
Since the post message can be described in the IF and transmitted, the protocol procedure can be shortened, and when a communication interruption instruction is given, it can be immediately responded to.

Further, according to the inventions of claims 3 and 4, when the information included in the RCP frame, which indicates communication interruption, is received, the line can be opened to interrupt the communication. Particularly, according to the invention of claim 4, since the information indicating the communication interruption is registered, it is possible to confirm that the interruption of the communication is due to the operator's instruction by analyzing this information later. . That is,
The receiver can confirm that communication has been interrupted because an error has occurred on the transmitter side.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main function of a transmission unit of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a main function of a receiving unit of the facsimile apparatus according to the embodiment of the present invention.

FIG. 3 is a block diagram showing an overall configuration of a facsimile apparatus according to an embodiment of the present invention.

FIG. 4 is a general flowchart of a transmission procedure.

FIG. 5 is a flowchart showing a procedure of a transmission phase A.

FIG. 6 is a flowchart showing a procedure of a transmission phase B.

FIG. 7 is a flowchart showing a procedure of a transmission phase C.

FIG. 8 is a flowchart showing a procedure of a transmission phase D.

FIG. 9 is a general flowchart of a reception procedure.

FIG. 10 is a flowchart showing a procedure of a reception phase B.

FIG. 11 is a flowchart showing a procedure of a reception phase C.

FIG. 12 is a flowchart showing a procedure of a reception phase D.

FIG. 13 is a transmission / reception sequence diagram according to an embodiment of the present invention.

FIG. 14 is a transmission / reception sequence diagram according to an embodiment of the present invention.

FIG. 15 is a diagram showing a structure of an image information frame.

FIG. 16 is a frame configuration diagram of RCP including a post message.

FIG. 17 is a flowchart showing a procedure of a transmission phase C in which a case where a stop key is pressed is scheduled.

FIG. 18 is a flowchart showing a procedure of a reception phase C scheduled to receive an RCP including DCN and the like.

FIG. 19 is a frame configuration diagram of RCP including information indicating communication interruption.

FIG. 20 is a sequence diagram showing a procedure of a conventional technique.

FIG. 21 is a sequence diagram showing a procedure of a conventional technique.

FIG. 22 is a sequence diagram showing a procedure of a conventional technique.

[Explanation of symbols]

16 ... Stop key, 17 ... Suspension request detection unit, 18
... code storage unit, 19 ... RCP frame generation unit, 2
1, 24 ... Line opening unit, 20 ... Transmitting unit, 22 ... RC
P frame detection unit, 23 command analysis unit, 25 ... registration unit

Front page continuation (72) Inventor Hirotaka Kawabata 3-7-1 Fuchu, Iwatsuki City, Saitama Prefecture Fuji Xerox Co., Ltd. (56) References JP-A-6-125439 (JP, A) JP-A-5-219335 ( JP, A) JP 59-226562 (JP, A) JP 7-74877 (JP, A) JP 3-120954 (JP, A) JP 62-39964 (JP, A) (58) ) Fields surveyed (Int.Cl. ⁷ , DB name) H04N 1/32-1/36 H04N 1/42-1/44

Claims (4)

(57) [Claims] 1. A transmission means for transmitting image information and a protocol signal to a line, an RCP frame generation means for generating an RCP frame having an FIF, an input means for instructing communication interruption, and a communication input by the input means. Interruption request detection means for detecting an interruption instruction and outputting a detection signal, wherein the RCP frame generation means writes DCN in the FIF of the RCP frame in response to the detection signal and outputs the DCN to the transmission means. A facsimile apparatus having the above-mentioned configuration. 2. The RCP frame generation means is configured to write a code to indicate communication interruption in the FIF of the RCP frame in response to the detection signal and output the code to the transmission means. The facsimile apparatus according to claim 1, wherein: 3. An RCP frame detecting means for detecting an RCP frame, an analyzing means for analyzing the FIF of the detected RCP frame to judge whether or not information indicating communication interruption is described, and the analyzing means. Information that means communication interruption is RCP
A facsimile machine comprising: a line opening means for opening a line when it is determined that the line is included in a frame. 4. The facsimile apparatus according to claim 3, further comprising a registration unit that registers the information when the information indicating the interruption of communication is included in the RCP frame.