Facsimile apparatus

1. Field of the Invention

The invention relates to a facsimile apparatus which can perform a both-side transmission.

2. Related Background Art

In a conventional facsimile apparatus which can transmit a one-side document sheet, as a re-transmitting operation when an error occurs during a communication, a re-transmission from a page in which the error occurred is executed.

There is, consequently, the following drawback. That is, in the case where an error re-transmission is executed at the time of transmission of a both-side document sheet, for example, if a communication error occurs during the transmission of the reverse side of the both-side document sheet and an error re-transmission is executed, data of the reverse side of the error re-transmitted document sheet is recorded onto the front side of a recording paper. If the reception document sheet in which the error occurred and the reception document sheet which was error re-transmitted are tried to be coupled on the receiver side, the reverse side becomes a blank paper during the operation or the printing is performed up to the midway, and the reception document sheet becomes hard to be seen.

It is, therefore, an object of the invention to provide a facsimile apparatus which can perform a re-transmitting operation for enabling reception data to be received in a good state on the reception side even upon error re-transmission when a both-side document sheet is transmitted.

FIG. 1 is a block diagram showing an embodiment of the invention;

FIG. 2 is a flowchart showing the operation in the embodiment;

FIG. 3 is a flowchart showing the operation in the embodiment;

FIG. 4 is a flowchart showing the operation in the embodiment;

FIG. 5 is a flowchart showing the operation in the embodiment;

FIG. 6 is a flowchart showing the operation in the embodiment;

FIG. 7 is a flowchart showing the operation in the embodiment;

FIG. 8 is a flowchart showing the operation in the embodiment;

FIG. 9 is a flowchart showing the operation in the embodiment;

FIG. 10 is a diagram showing bits which are allocated to DIS, DTC, and DCS for both-side transmission;

FIG. 11 is a diagram showing Q and PPS-Q which are used for both-side transmission;

FIG. 12 is a diagram showing a both-side transmission in an alternate mode in a normal G 3 mode;

FIG. 13 is a diagram showing a both-side transmission in an alternate mode in an ECM mode;

FIG. 14 is a diagram showing a both-side transmission in a continuous mode in the normal G 3 mode;

FIG. 15 is a diagram showing a both-side transmission in the continuous mode in the ECM mode;

FIG. 16 is a flowchart of an embodiment 2;

FIG. 17 is a flowchart of the embodiment 2;

FIG. 18 is a flowchart of the embodiment 2;

FIG. 19 is a flowchart of the embodiment 2;

FIG. 20 is a flowchart of the embodiment 2;

FIG. 21 is comprised of FIGS. 21A and 21B showing flowcharts of the embodiment 2;

FIG. 22 is a flowchart of the embodiment 2; and

FIG. 23 is a flowchart of the embodiment 2.

FIG. 1 is a block diagram showing a construction of a facsimile apparatus according to an embodiment of the invention. The facsimile apparatus according to the embodiment 1 has a construction such that a both-side reading, a both-side transmission, and a both-side recording of document sheet data can be performed.

First, to use a telephone network for a data communication or the like, an NCU (network control unit) 2 is connected to a terminal of its telephone line, performs a connection control of a telephone exchange network, switches to a data communication path, and holds a loop. If a signal level (signal line 20 a ) from a control circuit 20 is equal to “0”, a telephone line 2 a is connected to a telephone set 4 side. If the signal level is equal to “1”, the telephone line 2 a is connected to a facsimile apparatus side. In a normal state, the telephone line 2 a is connected to the telephone set 4 side.

A hybrid circuit 6 separates a signal of a transmission system and a signal of a reception system, sends a transmission signal from an adder circuit 12 to the telephone line 2 a via the NCU 2 , receives a signal from a partner side via the NCU 2 , and transmits it to a modem 8 via a signal line 6 a.

The modem 8 performs a modulation and a demodulation based on ITU-T recommendation V.8, V.21, V.27ter, V.29, V.17, and V.34, and each transmission mode is designated by a signal line 20 c . The modem 8 inputs a signal outputted onto a signal line 20 b , outputs modulation data to a signal line 8 a , inputs the reception signal outputted to the signal line 6 a , and outputs demodulation data onto a signal line 8 b .

An ANSam send-out circuit 10 is a circuit to send out an ANSam signal. When the signal at the signal level “1” is outputted to a signal line 20 d , the ANSam send-out circuit 10 sends out the ANSam signal to a signal line 10 a .When the signal at the signal level “0” is outputted to the signal line 20 d , the ANSam send-out circuit 10 sends out no signal to the signal line 10 a.

The adder circuit 12 inputs data on the signal line 8 a , data on the signal line 10 a , and data on a signal line 26 a and outputs an addition result to a signal line 12 a.

When the signal at the signal level “0” is outputted to a signal line 20 f , a reading circuit 14 reads out data on the front side. When the signal at the signal level “1” is outputted to the signal line 20 f , the reading circuit 14 reads out data on the reverse side. The reading circuit 14 outputs the read data to a signal line 14 a.

When the signal at the signal level “0” is outputted to a signal line 20 g , a recording circuit 16 sequentially records data outputted to a signal line 20 e onto the front side of the recording paper every line. When the signal at the signal level “1” is outputted to the signal line 20 g , the recording circuit 16 sequentially records data outputted to the signal line 20 e onto the reverse side of the recording paper every line.

A memory circuit 18 is used to store raw data of the read data or coded data, or store received data, decoded data, or the like.

A both-side reading select button 22 is a button to select the both-side reading in the reading circuit 14 . When the button 22 is depressed, a depression pulse is generated to a signal line 22 a.

A both-side reading display circuit 24 is a circuit to display the execution of the both-side reading. When a clear pulse is generated on a signal line 20 h , the display circuit 24 displays nothing. After that, each time the depression pulse is generated to the signal line 22 a , “display”→“not display”→“display” are repeated. At the time of “display”, the signal at the signal level “1” is outputted to a signal line 24 a . At the time of “not display”, the signal at the signal level “0” is outputted to a signal line 24 a.

A calling circuit 26 inputs data outputted to a signal line 20 j and outputs a select signal of DTMF to the signal line 26 a when a call command pulse is generated to a signal line 20 i.

An error re-transmission setting circuit 28 is a circuit to set an error re-transmission mode. When a second mode to re-transmit from the error page is selected, the setting circuit 28 outputs the signal at the signal level “0” to a signal line 28 a . When a first mode to re-transmit data of a document sheet of the first page and data from the error page is selected, the setting circuit 28 outputs the signal at the signal level “1” to the signal line 28 a.

The control circuit 20 controls the whole facsimile apparatus of the embodiment and, particularly, executes the following control in the embodiment.

First, upon communication of the facsimile, the presence or absence of the both-side reception function is notified by a DIS signal from a receiver to a transmitter and a both-side document sheet is designated from the transmitter to the receiver by a DCS signal. When the both-side document sheet is designated, document images are transmitted in accordance with the order from the front side to the reverse side. In case of changing the document sheet to a one-side document sheet in the middle of the page, an operating phase is returned to phase B and the one-side document sheet is designated by a DCS signal.

On the other hand, when the one-side document sheet is designated by the DCS signal and the image signal is transmitted and the document sheet is changed to the both-side document sheet in the middle of the page, the operating phase is returned to phase B. The both-side document sheet is designated by the DCS signal and, after that, the document images are transmitted in accordance with the order from the front side to the reverse side.

As for the error re-transmission when an error occurs during the communication, the re-transmission is always executed from the front side at the time of transmission of the both-side document sheet. That is, the error re-transmission is executed from the front side of the document sheet of, particularly, the n-th page even in an error during the transmission of the front side of the document sheet of the n-th page or an error during the transmission of the reverse side of the document sheet of the n-th page.

Further, upon setting of the error re-transmission, if the re-transmission (second mode) from the page in which an error occurred is selected on the basis of the selection by the setting circuit 28 , the error re-transmission is executed as it is. When the re-transmission (first mode) from the document sheet of the first page and the page in which an error occurred is selected, the one-side document sheet is first designated by the DCS signal, the transmission of the document sheet of the first page is executed, the operating phase is subsequently returned to phase B, the both-side document sheet is designated by the DCS signal, and the error re-transmission is executed after that.

FIGS. 2 to 9 are flowcharts showing a flow of control of the control circuit 20 .

In FIG. 2, the operation is started in step S 0 . A clear pulse is generated to the signal line 20 h and the both-side reading display circuit 24 is not displayed in step S 2 . The signal at the signal level “0” is outputted to the signal line 20 a and the CML is turned off in step S 4 . The signal at the signal level “0” is outputted to the signal line 20 d and no ANSam signal is transmitted in step S 6 .

Whether the transmission has been selected or not is discriminated in step S 8 . When it is selected, step S 12 follows. When it is not selected, step S 10 follows and another process is performed.

The data on the signal line 24 a is inputted and whether the both-side reading mode has been selected or not is discriminated in step S 12 . When it is selected, step S 68 follows. When it is not selected, step S 14 follows. “1” is set into a page counter in step S 14 . The data on the front side of one page is read out in correspondence to a count value of the page counter and encoded and stored into a memory in step S 16 .

The presence or absence of a next document sheet is discriminated in step S 18 . If there is the next document sheet, step S 20 follows and the count value of the page counter is increased by “1”. Step S 16 follows. If there is not a next document sheet, step S 22 follows, the signal at the signal level “1” is outputted to the signal line 20 a , and the CML is turned on.

The designated destination is called by the calling circuit 26 in step S 24 . A pre-procedure is executed in step S 26 . The one-side transmission is now designated by the DCS signal. “1” is set into a transmission page counter in step S 28 . Page data of the transmission page counter is transmitted in step S 30 .

Whether a communication error has occurred or not is discriminated in step S 32 . If no communication error occurs, step S 34 follows. If the communication error has occurred, step S 42 follows. The presence or absence of a next page is discriminated in step S 34 . If there is the next page, step S 36 follows. If NO, step S 40 follows.

A mid-procedure is executed in step S 36 . The count value of the transmission page counter is increased by “1” in step S 38 and step S 30 follows.

A post-procedure is executed in step S 40 and step S 4 follows.

The signal at the signal level “0” is outputted to the signal line 20 a and the CML is turned off in step S 42 . The apparatus waits for 10 seconds in step S 44 . The signal at the signal level “1” is outputted to the signal line 20 a and the CML is turned on in step S 46 .

The same destination as the destination called in step S 24 is called by the calling circuit 26 in step S 48 . A pre-procedure is executed and the one-side transmission is designated by the DCS signal in step S 50 .

The data on the signal line 28 a is subsequently inputted and whether the error re-transmission has been set or not is discriminated in step S 52 . When the mode to send the document sheet of the first page is set, step S 54 follows and the data of the first page is transmitted. The processing routine advances to step S 58 via a mid-procedure in step S 56 . When the mode not to send the data of the document sheet of the first page is set, step S 58 directly follows.

The data of the page of the transmission page counter is transmitted in step S 58 . The presence or absence of a next page is discriminated in step S 60 . When there is the next page, step S 64 follows and the mid-procedure is executed. The count value of the transmission page counter is increased (incremented) by “1” in step S 66 and step S 58 follows. If there is not the next page, step S 62 follows and a post-procedure is executed and step S 4 follows.

“1” is set into the count value of the page counter in step S 68 . The front side is set to the document sheet side in step S 70 . The data of one page is read out in correspondence to the count value of the page counter and the document sheet side and encoded and stored into the memory in step S 72 .

Whether the document sheet side is the front side or not is discriminated in step S 74 . If it is the front side, step S 76 follows and the reverse side is set to the document sheet side and step S 72 follows. If it is the reverse side, step S 78 follows and the presence or absence of a next document sheet is discriminated. If there is the next document sheet, step S 80 follows, the count value of the page counter is increased by “1”, and step S 70 follows. If NO, step S 82 follows.

The signal at the signal level “1” is outputted to the signal line 20 a and the CML is turned on in step S 82 . The designated destination is called by using the calling circuit 26 in step S 84 .

A pre-procedure is subsequently executed in step S 86 . Whether the partner station has the both-side transmission function or not is discriminated in step S 88 . If YES, step S 90 follows. If NO, step S 148 follows.

A remaining pre-procedure is executed and the both-side transmission is designated by the DCS signal in step S 90 . “1” is subsequently set into the transmission page counter in step S 92 . The front side is set to the document sheet side in step S 94 .

The data of page corresponding to the transmission page counter and the document sheet side is transmitted in step S 96 . Whether an error has occurred or not is discriminated in step S 98 . If no error occurs, step S 100 follows. If the error occurred, step S 112 follows.

Whether the document sheet side is the front side or not is discriminated in step S 100 . If it is the front side, step S 102 follows and the reverse side is set to the document sheet side. Step S 96 follows via a mid-procedure in step S 103 . When the document sheet side is the reverse side, step S 104 follows and the presence or absence of a next page is discriminated. If there is the next page, step S 108 follows and a mid-procedure is executed. The count value of the transmission page counter is increased by “1” in step S 110 and step S 94 follows. If NO, step S 106 follows, a post-procedure is executed, and step S 4 follows.

The signal at the signal level “0” is outputted to the signal line 20 a and the CML is turned off in step S 112 . The apparatus waits for 10 seconds in step S 114 . The signal at the signal level “1” is outputted to the signal line 20 a and the CML is turned on in step S 116 .

The same destination as that called in step S 84 is subsequently called by using the calling circuit 26 in step S 118 . A pre-procedure is executed in step S 120 . The data on the signal line 28 a is inputted and whether the error re-transmission has been set or not is discriminated in step S 122 . If the mode to also send the data of the first page has been set, step S 126 follows and a remaining pre-procedure to designate the one-side transmission by the DCS signal is executed. The data of the front side of the first page is transmitted in step S 128 . A mid-procedure is executed in step S 130 . The operating phase is returned to phase B and the both-side transmission is designated by the DCS signal. After that, step S 132 follows.

When the mode not to send the data of the first page is set in step S 122 , step S 124 follows and a remaining pre-procedure to designate the both-side transmission by the DCS signal is executed. After that, step S 132 follows.

The front side is set to the document sheet side in step S 132 . The data of the page of the transmission page counter and the document sheet side are transmitted in step S 134 .

Whether the document sheet side is the front side or not is discriminated in step S 136 . If it is the front side, step S 138 follows and the reverse side is set to the document sheet side. A mid-procedure is executed in step S 139 and step S 134 follows. If it is the reverse side, step S 140 follows and the presence or absence of a next page is discriminated. If there is the next page, step S 144 follows and a mid-procedure is executed. The count value of the transmission page counter is increased by “1” in step S 146 and step S 132 follows. If NO, step S 142 follows, a post-procedure is executed, and step S 4 follows.

A remaining pre-procedure is executed and the one-side transmission is designated by the DCS signal in step S 148 . A control similar to that in the foregoing steps S 92 to S 118 is subsequently executed in step S 150 . After the execution of step S 118 , the processing routine advances to next step (S 152 ). After the execution in step S 106 , step S 4 follows.

A pre-procedure is executed and the one-side transmission is designated by the DCS signal in step S 152 . If the mode to also send the data of the first page is set in step S 154 in the same control as that in step S 122 , the processing routine advances to step S 156 . If the mode not to send the data of the first page is set, step S 160 follows.

A process (transmission of the data of the front side of the first page) similar to that in step S 128 mentioned above is executed in step S 156 . A mid-procedure is executed in step S 158 and step S 160 follows.

The process (transmission of the data of the page of the transmission page counter and the document sheet side) in step S 134 mentioned above is executed in step S 160 . The process (to discriminate whether the document sheet side is the front side or not) in step S 136 mentioned above is executed in step S 162 . If NO (the document sheet side is the reverse side) in step S 162 , step S 166 follows and the discrimination in step S 140 is performed. If YES (the document sheet side is the front side) in step S 140 , step S 164 follows and the processes (the reverse side is set to the document sheet side and the mid-procedure is executed) in steps S 138 and S 139 are executed. Step S 160 follows.

A process (to discriminate whether there is a next page or not) similar to that in step S 140 mentioned above is executed in step S 166 . If NO (there is not the next page), step S 168 follows and the same process (post-procedure) as that in step S 142 is executed. Step S 4 follows. If YES (there is the next page), step S 170 follows and the same processes (the mid-procedure is executed and the count value of the transmission page counter is increased by “1”) as those in steps S 144 and S 146 are executed. The front side is set to the document sheet side in step S 172 and step S 160 follows.

Explanation has been made on the assumption that the operation of the control circuit as mentioned above is executed by the CPU in the control circuit on the basis of programs stored in an ROM, an RAM, or the like in the control circuit. However, according to the invention, the apparatus can be also constructed in a manner such that those programs are stored into an external memory medium such as floppy disk, hard disk, optical disk, CD-ROM, memory card, or the like, installed into the control circuit by a dedicated reading apparatus, and executed by the CPU in the control circuit.

Although the above embodiment has been described as an example of the facsimile apparatus of the stand-alone type, the invention is not limited to it but can be applied to a data communication control in an integrated data processing system in which, for example, a copying function and an electronic filing function and, further, a data processing function are combined to a communicating function.

According to the embodiment of the invention as described above, in the case where a communication error occurs on the reverse side during the transmission of the both-side document sheet and a re-transmission is executed after that, the transmitter side re-transmits the data from the front side. Therefore, the front side does not become a blank paper. On the receiver side, when the error re-transmitted reception document sheet is combined to the document sheet first received, the document sheet whose front side is the blank paper is not inserted in the middle of the both-side document sheet and the reception document sheet which can be easily seen can be obtained.

According to the embodiment, if the re-transmission of the data of the document sheet of the first page and the data from the error page is selected as an error re-transmission, the transmission of only the front side of the first page and the transmission from the font side of the error document sheet can be performed in the transmission of the both-side document sheet. The increase in communication costs due to the transmission of the unnecessary read data of the reverse side of the document sheet of the first page to the user on the receiver side does not occur. The reception document sheet of the error re-transmission and the document sheet received before it can be coupled without changing the order of the front side and the reverse side and an apparatus which can be easily operated for the user can be provided.

In the embodiment 2, only the portions different from those in the embodiment 1will be described. The same portions as those in the diagrams in the embodiment 1are designated by the same reference numerals and their descriptions are omitted.

An outline of the both-side transmission of the embodiment 2 will now be described.

As a communication mode of the both-side transmission, there are two modes of an alternate mode and a continuous mode.

The alternate mode is a mode to transmit the front sides and reverse sides of the both-side document sheet in accordance with the order of pages. The continuous mode is a mode to first transmit all of the front sides of the both-side document sheet in accordance with the order of pages and subsequently transmit all of the reverse sides of the both-side document sheet in accordance with the order of pages.

The definition of the both-side transmission in the FIF of the DIS, DTC, and DCS signals will now be described.

FIG. 10 shows the FIF of the DIS, DTC, and DCS signals regarding the both-side transmission. In the DIS/DTC signals, the presence or absence of the both-side recording function in the alternate mode is shown by the X-th bit of the FIF, and the presence or absence of the both-side recording function in the continuous mode is shown by the (X+1)th bit of the FIF. In the DCS signal, the both-side transmission in the alternate mode is shown by the X-th bit of the FIF and the both-side transmission in the continuous mode is shown by the (X+1)th bit of the FIF. When the (X+1)th bit is set to “1” by the DIS/DTC, the X-th bit has to be set to “1”.

FIG. 11 shows a frame construction of a Q signal (EOP, MPS, EOM) in the normal G 3 transmission and a PPS-Q signal (PPS-EOP, PPS-MPS, PPS-EOM, PPS-NULL) in the ECM transmission.

FIG. 11 shows a frame comprising: Flag; Address; Control; FCF; PC (page counter); BC (block counter); FC (frame counter); Length (the total number of octets of the Page Number (2 octets) and the Page Information (1octet at present); Page number (value obtained by adding the number of pages of every front side page and reverse side page from the first page considering a case of alternately transmitting the front sides and the reverse sides of the both-side document sheet in accordance with the order of pages); Page information (the front side (set to “0”) or the reverse side (set to “1”) is designated by bit 0); FCS; and Flag.

None of PC, BC, and FC is included in the Q signal which is used in a normal G 3 mode, and PC, BC, and FC are used in only a PPS-Q signal which is used in the ECM communication.

FIG. 12 shows the both-side transmission in the alternate mode in the normal G 3 mode.

FIG. 13 shows the both-side transmission in the alternate mode in the ECM mode.

FIG. 14 shows the both-side transmission in the continuous mode in the normal G 3 mode.

FIG. 15 shows the both-side transmission in the continuous mode in the ECM mode.

FIGS. 16 to 23 show the processing operation of the control circuit 20 in the embodiment 2.

In the diagrams, the same processes as those in the embodiment 1are designated by the same reference numerals and their descriptions are omitted.

In the embodiment 2, mainly, in a facsimile apparatus which can perform the alternate both-side transmission according to the ITU-T recommendation, it is assumed that when a communication error occurs during the transmission of the both-side document sheet, even if an error occurred in an even-number page, the page number to be re-transmitted is set to an odd-number page and data is re-transmitted from this odd page.

Specifically speaking, even if an error occurred during the transmission of the page of page No. 2(n+1) (reverse side), data is re-transmitted from the page of page No. 2n+1(front side) that is one-preceding thereto.

The apparatus further has means for selecting whether the front side of the document sheet of the first page is transmitted or not as an error re-transmission. If the re-transmission of the front side of the document sheet of the first page is selected, the front side of the document sheet of the first page is transmitted upon re-transmission after the occurrence of the error. Subsequently, entirely blank data is transmitted as data of the reverse side and data is re-transmitted from the front side of the document sheet in which the error occurred.

The page number (page number which is notified to the receiver) which is added to the same page when the document sheet of the first page is re-transmitted upon re-transmission and that when it is not re-transmitted are different.

In the embodiment 1, the number of document sheets is counted by the page counter and stored into the memory as a front side and a reverse side of each page. In the embodiment 2, besides it, a control to add different page numbers (serial numbers) to the front side and reverse side of each document sheet and notify the reception side of the different page numbers is performed.

In FIG. 17, a pre-procedure is performed and the one-side transmission is designated by the DCS signal in step S 226 . Specifically speaking, the X-th bit and the (X+1)th bit of the FIF of the DCS signal are set to “0”.

In FIG. 18, a pre-procedure is performed and the one-side transmission is designated by the DCS signal in step S 250 . Specifically speaking, the X-th bit and the (X+i)th bit of the FIF of the DCS signal are set to “0”.

Whether the partner station has the both-side transmission function in the alternate mode or not is discriminated in step S 288 in FIG. 19 . If YES, step S 290 in FIG. 20 follows. If NO, step S 2148 in FIG. 23 follows.

A remaining pre-procedure is executed and the both-side transmission is designated by the DCS signal in step S 290 in FIG. 20 . Specifically speaking, the X-th bit of the FIF of the DCS signal is set to “1” and the (X+1)th bit is set to “0”. Subsequently, in step S 291 , “1” is set into the page number.

A mid-procedure is executed and the page number and the document sheet side are notified to the receiver by using the Q and PPS-Q described in FIG. 3 in step S 2103 . The page number is increased by “1” in step S 21031 . The reverse side is set to the document sheet side in step S 21032 .

A mid-procedure is executed and the page number and the document sheet side are notified to the receiver by using the Q and PPS-Q described in FIG. 3 in step S 2108 .

A post-procedure is executed and the page number and the document sheet side are notified to the receiver by using the Q and PPS-Q described in FIG. 3 in step S 2106 .

“1” is set into the page number in step S 2121 in FIGS. 21A and 21B.

The both-side transmission is designated in steps S 2126 and S 2124 . Specifically speaking, the X-th bit of the FIF of the DCS signal is set to “1” and the (X+1)th bit is set to “0”.

A mid-procedure is executed, the page number is notified and the front side is notified to the receiver as a document sheet side by using the Q and PPS-Q described in FIG. 3 in step S 2130 . The page number is increased by “1” in step S 21301 . The data of the entirely blank page is transmitted in step S 21302 . If only the front side of the first page is re-transmitted, the user on the reception side can sufficiently recognize the error re-transmission is a re-transmission of which communication. Therefore, the data of the entirely blank page is transmitted in place of transmitting the data of the reverse side of the first page. A mid-procedure is executed, the page number is notified, and the reverse side is notified to the receiver as a document sheet side by using the Q or PPS-Q described in FIG. 3 in step S 21303 . The page number is increased by “1” in step S 21304 .

A mid-procedure is executed and the page number and the document sheet side are notified to the receiver by using the Q or PPS-Q described in FIG. 3 in steps S 2139 and S 2144 in FIG. 22 .

A post-procedure is executed and the page number and the document sheet side are notified to the receiver by using the Q or PPS-Q described in FIG. 3 in step S 2142 .

The page number is increased by “1” in steps S 2147 and S 21391 .

The reverse side is set to the document sheet side in step S 21392 .

In FIG. 23, a remaining pre-procedure is executed and the one-side transmission is designated by the DCS signal. Specifically speaking, the X-th bit and the (X+1)th bit of the DCS signal are set to “0”.

A control similar to that in a range from step S 291 in FIG. 20 to step S 118 in FIG. 21A is executed in step S 2150 . The page number and the document sheet side are not notified in the mid-procedure in steps S 2103 and S 2108 and the post-procedure in step S 2106 .

A pre-procedure is executed in step S 2152 and the one-side transmission is designated by the DCS signal. Specifically speaking, the X-th bit and the (X+1)th bit of the DCS signal are set to “0”.

The same processes as those in steps S 2139 , S 21391 , and S 21392 are executed in step S 2164 (after the mid-procedure, the page number is increased by “1” and the reverse side is set to the document sheet side). The page number and the document sheet side are not notified in step S 2139 .

A post-procedure is executed in step S 2168 . The page number and the document sheet side are not notified.

The same processes as those in steps S 2144 , S 146 , and S 2147 are executed in step S 2170 (the mid-procedure is executed, the count value of the transmission page counter is increased by “1”, and the page number is increased by “1”). The page number and the document sheet side are not notified in step S 2144 .