JP2002101281A - Facsimile apparatus, method for controlling the same and computer readable storage medium for storing control program thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable sure recognition of an error page at a receiver side and detection of an omission or the like of a received page if a reception error occurs, for example, in a normal G3 communication in a specific communication mode. SOLUTION: When one-side transmission according to a normal G3 mode in a transmitter is selected and a remote receiver having a double-side receiving capability is detected, a double-side transmission is not designated for the receiver from the transmitter in the sequence before facsimile transmission (step S28), control information regarding a page to be transmitted by a protocol of the double-side transmission is transmitted from the transmitter to the receiver in an inter-page protocol (step S30).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus for performing communication using a duplex transmission mode for transmitting an image of a duplex document, a method for controlling the facsimile apparatus, and a computer-readable storage storing a control program for the facsimile apparatus. It is about media.

[0002]

2. Description of the Related Art Conventionally, in normal G3 facsimile communication, a communication procedure specified in ITU-T Recommendation T30 has been used. In ITU-T Recommendation T30, as a protocol between pages, an MPS signal indicates that there is a next page and a mode change is not required, an EOM signal indicates that there is a next page and a mode change is required, and an EOP signal indicates that there is no next page. A signal is transmitted from the receiver to the transmitter.

[0003]

Since there is no information indicating the page number in the MPS signal, EOM signal, and EOP signal used in the above-mentioned protocol used in the conventional normal G3 communication, the receiver side needs, for example, When the MPS signal is received, it is unknown which page the protocol signal of the image information is, and this may cause a problem.

FIG. 2 shows a state of conventional normal G3 communication. In FIG. 2, the exchange of the DIS / DCS signal, the training signal and C
After the transmission and reception of the FR signal, image transmission of phase B is started.

In this phase B image transmission, the receiver transmits the MCF signal in response to the reception of the image signal (PIX1) of the first page and the MPS signal, and shifts to the reception of the image signal of the second page. If the subsequent reception of the training signal fails (X), and if the image signal of the subsequent second page is short at this time, the MPS signal transmitted from the next transmitter is changed to the image signal of the first page. The receiver may determine that the MPS signal has been retransmitted,
There is a problem that not only the reception of the image signal of the second page fails, but also the operator cannot be notified of the fact.

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems, and when a reception error occurs even in a specific communication mode, for example, normal G3 communication, an error page can be reliably recognized on the receiving side, and the received page is omitted. Is to be able to detect.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a facsimile apparatus, a method for controlling a facsimile apparatus, and a computer-readable storage medium storing a control program for a facsimile apparatus are provided. The facsimile machine detects the presence or absence of the two-sided reception function of the other party's receiver, and if the transmitter selects single-sided transmission in the specific communication mode and detects that the other party's receiver has the two-sided reception function, In the procedure, double-sided transmission is not designated from the transmitter to the receiver, but control information on pages transmitted using the double-sided transmission protocol in the inter-page protocol is transmitted from the transmitter to the receiver.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 shows a hardware configuration of a facsimile apparatus employing the present invention. As shown in the figure, the present apparatus has a configuration in which each component is connected to a bus 26 of a CPU 22.

In FIG. 1, reference numeral 2 denotes an NCU (network control unit) which connects a telephone network to a terminal of the line in order to use the telephone network for data communication and the like, controls connection of a telephone exchange network, and connects to a data communication path. , And holds a loop. The NCU 2 connects the telephone line 2a to the telephone 4 under the control of the bus 26 (CML).
Off) or connect the telephone line 2a to the facsimile machine side (CML on). In a normal state, the telephone line 2a is connected to the telephone 4 side.

Reference numeral 6 denotes a hybrid circuit, which separates a transmission system signal and a reception system signal, transmits a transmission signal from the addition circuit 12 to the telephone line 2a via the NCU 2, and transmits a signal from the other party. Received via NCU2, signal line 6a
It is sent to the modem 8 via

Reference numeral 8 denotes a modulator / demodulator. 8, V. 21, V.I. 27ter, V.A. 29, V.S.
17, V. The modulation and the demodulation are performed on the basis of the control of the bus, and the respective transmission modes are designated by the control of the bus. The modem 8 receives the transmission signal from the bus 26, outputs the modulation data to the signal line 8a, receives the reception signal output to the signal line 6a, and outputs the demodulated data to the bus 26.
Output to

Reference numeral 10 denotes a calling circuit which transmits input telephone number information to the signal line 1 under the control of the bus 26.
0a is output as a DTMF selection signal.

Reference numeral 12 denotes an addition circuit for adding transmission signals, which inputs information on the signal line 8a and information on the signal line 10a, and outputs a result of the addition to the signal line 12a.

The reading circuit 14 is a reading mechanism having a known configuration including a document conveying system, an optical reading element, and the like, and is configured to output image data read from a document to a bus 26.

The recording circuit 16 is a recording mechanism configured by various recording methods such as an electrophotographic method and an ink jet method, and sequentially converts the image information output to the bus 26 into one.
Recording is performed on the front surface or the back surface of the recording paper for each line.

Reference numeral 18 denotes a memory circuit, which is mainly used as a work memory. Here, the memory 18 is R
AM (or any storage device such as a hard disk)
And is used to store raw information or encoded information of read data, and to store received information or decoded information.

Reference numeral 20 denotes an operation unit, and its keyboard has a one-touch dial, a speed dial, a numeric keypad,
A key, a start key, a stop key, a set key, and other function keys are provided. Key information depressed on the keyboard is output to the bus 26. It is also assumed that the operation unit 20 is provided with keys for realizing a user interface for performing various types of registration operations in the memory 18.

Further, the operation section 20 is provided with a display section such as an LCD panel for executing various known user interfaces. The operation section 20 can input and output information output to the bus 26. And

The facsimile apparatus of this embodiment is capable of performing double-sided transmission, and can specify whether the transmission mode is double-sided or single-sided transmission from the keyboard of the operation unit 20. It is assumed that the double-sided transmission display indicating the above can be performed on the double-sided transmission display section 20a of the operation section 20. The two-sided transmission display unit 20a is
Can be configured using the display element of the display section. The two-sided transmission display of the two-sided transmission display unit 20a is initialized by inputting a clear pulse via the bus 26, and becomes a one-sided transmission display. Thereafter, every time the two-sided transmission selection button is pressed, "double-sided transmission display" is performed. → Repeat "Do not display duplex transmission" → "Display duplex transmission". Information indicating whether or not double-sided transmission is displayed is output to the bus 26 as information indicating the current transmission mode state.

Reference numeral 22 denotes a CPU (central processing unit) composed of a microprocessor or the like, which controls the entire facsimile apparatus and executes a facsimile transmission control procedure described later. The control program of the CPU 22 described later is R
It is stored in OM24.

In this embodiment, in order to solve the problem in the single-sided transmission mode, the protocol used for the double-sided transmission is also used in the single-sided transmission mode.

Here, the outline of the two-sided transmission communication procedure will be described with reference to FIGS. Here, a general two-sided transmission described in the currently proposed ITU-T Recommendation T30 (or a draft thereof) is shown.

There are two duplex communication modes in the ITU-T recommendation, a duplex duplex mode (alternate) mode and a duplex continuous mode.

Here, the alternate mode is a mode in which a double-sided original is transmitted in the order of pages from the front side to the back side. The continuous mode is a mode in which the front side of a two-sided original is transmitted first in the order of pages, and subsequently, the back side of the double-sided original is all transmitted in the order of pages. 5 to 8 show signal sequences in each of these modes. FIG. 5 shows the signal sequence of the normal mode (non-ECM) of the alternating mode, FIG. 6 shows the signal sequence of the ECM signal of the alternating mode, FIG. 7 shows the signal sequence of the normal mode (non-ECM) of the continuous mode,
FIG. 8 shows a continuous mode ECM signal sequence.

FIG. 3 shows the definition of double-sided transmission in DIS / DTC and DCS signals. As shown in the figure,
In the DIS / DTC signal in the double-sided transmission, x of the FIF
The bit (the number of bits is not formally determined and is indicated by “x” for convenience) indicates the presence or absence of the duplex printing function in the alternate mode, and the x + 1 bit of the FIF indicates whether the duplex printing function in the continuous mode is performed. Indicates presence or absence. DCS
In the signal, duplex transmission in the alternate mode is designated by the x-th bit of the FIF, and duplex transmission in the continuous mode is designated by the x + 1-th bit of the FIF.

The transceiver is DCS and DIS / DTC
In the pre-facsimile procedure, the functions of the own machine are notified by a signal. When turning on the x + 1 bit for the continuous mode in the DIS / DTC signal, the x bit in the alternate mode must be turned on.

FIG. 4 shows a post message signal, that is,
Q signal (specifically, EOP, MPS, or EOM) in normal G3 transmission, or PPS-Q signal (specifically, PPS-EO) in ECM transmission
P, PPS-MPS, PPS-EOM, or PPS-NULL).

FIG. 4 shows the configuration of a common FIF (facsimile information field) in each of the above-mentioned post message signals. This FIF is the same as the normal FIF
ag (flag), Address (address), Con
trol (control data), FCF (facsimile control field) followed by P for ECM
C is a page counter, BC is a block counter, and FC is a frame counter. These three counters are used only in ECM mode. This is followed by facsimile information related to double-sided transmission.

Facsimile information related to double-sided transmission is Len
gth (field width is 1 octet), Pagenu
mber (Page number: 2 octets), Page
information (page information), followed by FCS (frame check sequence), Fla
g (flag) follows.

The page number portion is considered in a case where a two-sided original is transmitted in the order of pages, the front side and the back side.
It is added one page at a time from P1. Also, Page i
In nformation, it is possible to specify the front side (0) or the back side (1) by bit0.

The above-mentioned Length and Page numbers
er and Page information are fields newly added for double-sided transmission. In the normal G3, the Q signal used is P
The fields of C, BC, and FC are not included, and these fields are used only in the PPS-Q signal used in the ECM communication.

In this embodiment, the ROM 24
Next, a communication procedure described below is stored as a program of the CPU 22.

That is, in the present embodiment, when the receiver of the other party has a two-sided transmission function and performs normal G3 communication of single-sided information, in the pre-procedure, as in the normal G3 mode, the FIF of the DCS signal is used. x bits, x
Although the two-sided transmission is not specified by the +1 bit, the protocol at the time of executing the two-sided transmission is used as the protocol between pages.

However, the other receiver has a two-sided transmission function, and even in the case of single-sided information, if the communication is in the ECM mode, the two-sided transmission is not specified in the pre-procedure. Does not execute the transmission protocol.

On the other hand, the receiver side does not specify the duplex transmission by the x and x + 1 bits of the FIF of the DCS signal from the partner transmitter in the previous procedure. Is executed, the protocol is treated as valid, facsimile reception in the normal G3 mode is performed, and page information that cannot be received by the communication protocol included in the execution of the duplex transmission is detected. When a page is detected, a message to that effect is displayed.

As described above, in the normal G3 mode, by diverting the protocol for executing double-sided transmission to the protocol between pages, error detection on the receiving side can be performed more easily than before.

FIGS. 9 to 13 are flow charts showing the flow of the above communication control. 9 to 13 are continuous at each position.

In FIG. 9, step S0 indicates the start of processing started by a predetermined reset operation or the like.

In step S2, the double-sided transmission display unit 20a of the operation unit 20 is controlled via the bus 26 so as not to perform double-sided transmission display. This disables the duplex transmission mode.

In step S4, the display on the display unit of the operation unit 20 is initialized via the bus 26.

In step S6, N
The CML of the CU 2 is turned off, and the line 2a is connected to the telephone 4 side.

In steps S8 and S10, it is determined whether any one of facsimile transmission and facsimile reception has been selected. The facsimile transmission process is selected by a predetermined operation of the operation unit 20, and the facsimile reception process is selected by detection of a call signal from the line 2a, detection of a predetermined manual reception operation by the operation unit 20, and the like. When facsimile transmission is selected, step S1
Step S4 when facsimile reception is selected
Go to 50. If neither facsimile transmission / reception has been selected, the process proceeds to step S12 to execute other processing (copying of a document or registration in the memory circuit 18).

In step S14, N
The CML of the CU 2 is turned on, and the line 2a is connected to the facsimile machine (hybrid circuit 6).

In step S16, a pre-facsimile procedure is executed. Here, the presence / absence of the duplex recording function of the receiver is stored.

In step S18, information on the double-sided transmission display section 20a of the operation section 20 is input via the bus 26, and it is determined whether or not double-sided transmission has been selected. Proceed to step S40 (FIG. 11)
If not, the process proceeds to step S20.

In step S20, it is determined based on the information obtained in the pre-facsimile procedure whether or not the other receiver has a double-sided recording function.
0, the process proceeds to step S22, and if the other party's receiver does not have the double-sided recording function, the process proceeds to step S34 in FIG.

In step S22 in FIG. 10, it is determined whether or not the partner receiver has an ECM receiving function. If the partner receiver has an ECM receiving function, the process proceeds to step S24. If not, the process proceeds to step S28.

In step S24, the remaining pre-facsimile procedure is executed. Here, ECM communication is specified, and both the x and x + 1 bits of the FIF of the DCS signal are set to 0, and no double-sided transmission is specified.

In step S26, an image signal of single-sided information is transmitted in the ECM mode. Here, the protocol between the pages does not use the protocol at the time of executing the duplex transmission. After step S26, a post-facsimile procedure is executed in step S32, and the process returns to step S6 in FIG.

The communication processing in the above steps S24 and S26 is the same as ordinary ECM facsimile transmission.

On the other hand, if the other receiver does not have the ECM receiving function, the remaining pre-facsimile procedure is executed in step S28. Here, normal G3 communication is specified, and x, x + 1 bits of the FIF of the DCS signal are specified. The eyes are both set to 0 and no double-sided transmission is specified.

Then, in step S30, the image signal of the one-sided information is transmitted in the normal G3 mode.
Here, as the protocol between pages, the protocol used when double-sided transmission is executed is used. The page number transmitted by the post message signal is arbitrary as long as the object of the present invention, that is, it is possible to use the double-sided transmission protocol and determine whether there is a page that cannot be normally received on the receiving side, 1, 3, as in the continuous transmission mode
5 and so on.

Alternatively, the transmitter and the receiver may declare in what sequence the page number is transmitted in the pre-procedure of step S28.

In step S32, a post-facsimile procedure is executed, and the process returns to step S6 in FIG.

On the other hand, if the other party's receiver has no double-sided recording function in step S20 in FIG.
At 34, it is determined whether or not the partner receiver has an ECM receiving function. If the partner receiver has an ECM receiving function, the process proceeds to step S24, and normal ECM communication is performed. If not, the process proceeds to step S36.

Step S36 represents the remaining pre-procedure. Here, normal G3 communication is specified, and DCS
Bits x and x + 1 of the FIF of the signal are both set to 0, and no double-sided transmission is specified.

In step S38, the image signal of the one-sided information in the normal G3 mode is transmitted. Here, the protocol between the pages does not use the protocol at the time of executing double-sided transmission. After the step S38, the post-facsimile procedure is executed in the step S32, and then the step S6 in FIG.
Return to.

On the other hand, if double-sided transmission has been selected in step S18, it is determined in step S40 in FIG. 11 whether or not the other-side receiver has a two-sided reception function. If the machine does not have the duplex reception function, the process proceeds to step S42.

In step S42, the remaining pre-facsimile procedure is executed. Here, if the partner receiver has an ECM function, ECM communication is performed. If the partner receiver does not have an ECM function, normal G3 communication is performed. Further, both the x and x + 1 bits of the FIF of the DCS signal are set to 0, and no double-sided transmission is specified.

In step S44, an image signal of double-sided information is transmitted. Here, since the partner machine has no two-sided transmission function, the two-sided information is transmitted to the front side and the back side in page order. Also, of course, the protocol for duplex transmission is not used in the protocol between pages. In the partner receiver, the received images are sequentially output simply by simplex recording.

In step S46, the remaining pre-facsimile procedure is executed. Here, if the partner receiver does not have the ECM function, the normal G3 communication is designated. By setting x bit = 1 and x + 1 bit = 0 in the FIF of the DCS signal, double-sided transmission in the alternate mode is designated.

In step S48, an image signal of double-sided information is transmitted. Here, since the other party has a two-sided transmission function, the protocol between the pages is the same as the one used when the two-sided transmission is executed in the alternate mode.

After the above steps S44 and S48,
After executing the post-facsimile procedure in step S32 in FIG. 10, the process returns to step S6 in FIG.

Next, the operation of the present apparatus as a receiver will be described. When facsimile reception is selected in step S10 of FIG. 9, in step S50 of FIG.
The CML of the NCU 2 is turned on via the bus 26, and the line 2
a is connected to the facsimile machine side.

In step S52, a pre-facsimile procedure is executed. Here, the transmitter is notified of the presence of the double-sided recording function.

In step S54, it is determined whether or not a two-sided transmission has been designated by the transmitter. If a two-sided transmission has been designated, the flow advances to step S56 to execute memory reception in the designated two-sided transmission mode. If no double-sided transmission is specified, the process proceeds to step S68 in FIG.

In step S58, a post-facsimile procedure is executed. In step S60, the NCU is
2 is turned off, and the line 2a is connected to the telephone 4 side.

In step S62, the information received in the memory is recorded on the front and back sides in the order of the page numbers.

In step S64, it is determined based on the page number, and it is determined whether or not there is any unreceivable page. The page number transmitted from the transmitter is determined by step S
The receiver counts up in a predetermined sequence, for example, 1, 3, 5,..., As in 30, so that based on this sequence the receiver can determine which page it could not receive. Can be identified. If there is a page that could not be received, step S6
The process proceeds to step S6, otherwise to step S6.

In step S66, a message "There is an error page in the current reception" is displayed on the display unit of the operation unit via the bus 26. This display is erased in response to any key operation on the operation unit 20. Thereafter, the process returns to step S6 in FIG.

If there is no designation of double-sided transmission in step S54, the process proceeds to step S68 in FIG.
It is determined whether or not the communication is the M communication. If the communication is the ECM communication, the process proceeds to step S70. If the communication is not the ECM communication, the process proceeds to step S7.
Proceed to 4.

In step S70, an image is received in the ECM mode, and a process of recording the image on one side of the recording paper by the recording circuit 16 is executed. In this process, the check of the unreceivable page can be performed by the PC, BC, and FC fields of the post message signal shown in FIG. 4 as in the related art because the ECM communication is used. Can specify retransmission by a PPR signal.

In step S72, a post-facsimile procedure is executed, and thereafter, the flow returns to step S6.

If ECM communication is not performed in step S68, reception in the normal G3 mode / recording on one side is executed in step S74. Here, the length of the double-sided protocol, pa
get number, page informatio
When n (see FIG. 4) is received, the information is sequentially stored in a predetermined area of the memory circuit 18.

In step S76, a post-facsimile procedure is executed, and in step S78, the NCU is
2 is turned off, and the line 2a is connected to the telephone 4 side.

Further, in step S80, step S
At 74, Length, page number,
It is determined whether or not page information (see FIG. 4) has been received. If the information has been received, the process proceeds to step S82, and if not, the process proceeds to step S6.

In step S82, it is determined whether or not the page numbers received in step S74 are all aligned in the sequence described in step S30, for example, in the order of 1, 3, 5,... 2n-1. If the page numbers are the same, the process proceeds to step S6, and if not, the process proceeds to the step S84.

In step S84, if 2k-1, 2l
If −1 (k and l are positive integers) cannot be received, “k, l
The page cannot be received. "
Notify (warn) that the page cannot be received. This display is deleted in response to any key operation of the operation unit 20.

As described above, in the normal G3 mode, by using the double-sided transmission protocol as the inter-page protocol and transmitting and receiving the page number information,
If a receiving error occurs without using CM communication, the receiving side can reliably recognize the error page, detect omission of the received page, etc., and lose the important business opportunity for the user on the receiving side. Has the excellent effect of preventing the occurrence of

Although the configuration of the facsimile machine has been described above, it goes without saying that the present invention can be applied not only to the facsimile machine but also to other types of facsimile machines. For example, according to the present invention, a general-purpose terminal such as a personal computer is externally / internally provided with a fax modem or the like,
The present invention can also be implemented in a configuration in which facsimile communication is performed by software control. In this case, the control program of the present invention may be stored and supplied not only in the above-described ROM but also in any computer-readable storage medium such as a hard disk, a floppy (registered trademark) disk, an optical disk, a magneto-optical disk, and a memory card. Can be.

[0082]

As described above, in a facsimile apparatus, a method for controlling a facsimile apparatus, and a computer-readable storage medium storing a control program for a facsimile apparatus, whether or not a transmitter has a two-sided reception function of a counterpart receiver If the transmitter selects single-sided transmission in the specific communication mode and detects that the partner receiver has a two-sided reception function, the two-sided transmission from the transmitter to the receiver is performed in the pre-facsimile communication procedure. Although the transmission is not specified, since a configuration is employed in which the control information regarding the page to be transmitted using the two-sided transmission protocol in the inter-page protocol is transmitted from the transmitter to the receiver, in a specific communication mode, for example, a normal G3 mode, Use double-sided transmission protocol for inter-page protocol, By sending and receiving of information,
If a receiving error occurs without using ECM communication, the receiving side can reliably recognize the error page, detect omission of the receiving page, and if a receiving error occurs, notify the receiving side of the error. There is an excellent effect that the user can be reliably notified (warned) and the receiving user can be prevented from suffering disadvantages such as losing important business opportunities.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a hardware configuration of a facsimile apparatus employing the present invention.

FIG. 2 is an explanatory diagram showing a signal sequence of normal G3 facsimile communication based on a conventional ITU-T recommendation T30.

FIG. 3 DIS / DTC and D used in duplex transmission
FIG. 3 is a table showing the FIF of a CS signal.

FIG. 4 is an explanatory diagram showing a format of a post message signal used in double-sided transmission.

FIG. 5 is an explanatory diagram showing a state of double-sided transmission in an alternate mode in a non-ECM communication mode.

FIG. 6 is an explanatory diagram showing a state of double-sided transmission in an alternate mode in an ECM communication mode.

FIG. 7 is an explanatory diagram showing a state of double-sided transmission in a continuous mode in a non-ECM communication mode.

FIG. 8 is an explanatory diagram showing a state of double-sided transmission in a continuous mode in the ECM communication mode.

FIG. 9 is a flowchart illustrating communication control of a CPU 22 of FIG. 1;

FIG. 10 is a flowchart illustrating communication control of a CPU 22 of FIG. 1;

FIG. 11 is a flowchart illustrating communication control of a CPU 22 of FIG. 1;

FIG. 12 is a flowchart illustrating communication control of a CPU 22 of FIG. 1;

FIG. 13 is a flowchart illustrating communication control of a CPU 22 in FIG. 1;

[Explanation of symbols]

 2 NCU 4 Telephone 6 Hybrid circuit 8 Modulator / demodulator 10 Calling circuit 12 Addition circuit 14 Reading circuit 16 Recording circuit 18 Memory 20 Operation unit 20a Double-sided transmission display unit 22 CPU 24 ROM 26 Bus

Claims (15)

[Claims] 1. A facsimile apparatus for performing communication using a two-sided transmission mode for transmitting an image of a two-sided document, comprising: a detecting means for detecting the presence or absence of a two-sided receiving function of a counterpart receiver in a transmitter; If single-sided transmission in the specific communication mode is selected, and the detecting means detects that the other receiver has a two-sided reception function, the transmitter specifies the two-sided transmission to the receiver in the pre-facsimile communication procedure. A facsimile apparatus for transmitting, from a transmitter to a receiver, control information about a page to be transmitted using a double-sided transmission protocol in an inter-page protocol. 2. The facsimile apparatus according to claim 1, wherein the specific communication mode is a non-ECM normal G3 mode. 3. In single-sided transmission in the ECM mode, even if the other party has a double-sided transmission function, double-sided transmission is not specified in the facsimile pre-procedure. 2. The facsimile apparatus according to claim 1, wherein one-sided transmission in a normal ECM mode is executed without being executed. 4. When the receiver does not specify double-sided transmission in the pre-facsimile procedure but performs a double-sided transmission protocol between pages, the receiver uses control information on the page transmitted by the double-sided transmission protocol. 2. The facsimile apparatus according to claim 1, wherein whether or not each page has been normally received is detected. 5. A receiver detects whether each page has been normally received by using control information on a page transmitted by the double-sided transmission protocol, and, when detecting a page that cannot be received, 5. The facsimile apparatus according to claim 4, wherein the fact is displayed. 6. A control method for a facsimile apparatus which performs communication using a duplex transmission mode for transmitting an image of a duplex document, comprising: a detection step of detecting whether or not a partner receiver has a duplex reception function at a transmitter; If single-sided transmission in the specific communication mode is selected in the transmitter, and it is detected in the detection step that the other party has a duplex reception function, the transmitter performs two-sided transmission in the pre-facsimile communication procedure. A method for controlling a facsimile apparatus, wherein transmission information is specified from a transmitter to a receiver, the transmission information not being designated, but control information relating to a page to be transmitted using a double-sided transmission protocol in an inter-page protocol. 7. The control method for a facsimile apparatus according to claim 6, wherein the specific communication mode is a non-ECM normal G3 mode. 8. In single-sided transmission in ECM mode, even if the other party has a double-sided transmission function, double-sided transmission is not specified in the facsimile pre-procedure. 7. The control method for a facsimile apparatus according to claim 6, wherein one-sided transmission in a normal ECM mode is executed without being executed. 9. When the receiver does not specify double-sided transmission in the pre-facsimile procedure but executes a double-sided transmission protocol between pages, the receiver uses control information about the page transmitted by the double-sided transmission protocol. 7. The control method for a facsimile apparatus according to claim 6, wherein whether or not each page has been normally received is detected. 10. A receiver detects whether each page has been normally received by using control information on a page transmitted by the double-sided transmission protocol, and when a page that cannot be received is detected, The method of controlling a facsimile apparatus according to claim 9, wherein the fact is displayed. 11. A computer-readable storage medium storing a control program of a facsimile apparatus for performing communication using a duplex transmission mode for transmitting an image of a duplex document, wherein a transmitter has a duplex reception function of a counterpart receiver. And a detecting step of detecting a single-sided transmission in a specific communication mode in the transmitter, and detecting that the other party has a two-sided receiving function in the detecting step, the transmitter in the pre-facsimile communication procedure Although a duplex process is not specified from the receiver to the receiver, a control step for transmitting control information about a page to be transmitted using the duplex protocol in the inter-page protocol from the transmitter to the receiver is stored. A computer-readable storage medium storing a control program for a facsimile machine to be executed. 12. The computer-readable storage medium storing a control program for a facsimile apparatus according to claim 11, wherein the specific communication mode is a non-ECM normal G3 mode. 13. In one-side transmission in the ECM mode,
Even if the partner machine has a two-sided transmission function, the two-sided transmission is not specified in the pre-facsimile procedure, and the single-sided transmission in the normal ECM mode is executed without executing the protocol for the two-sided transmission in the protocol between pages. A computer-readable storage medium storing a control program for a facsimile apparatus according to claim 11, wherein a control procedure for performing the control is stored. 14. In a receiver, when a two-sided transmission is not specified in a pre-facsimile procedure from a transmitter, but a two-sided transmission protocol is executed between pages, control information about the page transmitted by the two-sided transmission protocol is used. 12. A computer-readable storage medium storing a control program for a facsimile apparatus according to claim 11, wherein a control procedure for detecting whether or not each page has been normally received has been stored. 15. A receiver detects whether each page has been normally received by using control information on a page transmitted by the double-sided transmission protocol, and when a page that cannot be received is detected, 15. The computer-readable storage medium storing a control program for a facsimile apparatus according to claim 14, wherein a control procedure for displaying the fact is stored.