JP3564100B2 - Facsimile communication apparatus and facsimile communication method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a facsimile communication apparatus, and in particular, to ITU-T Recommendation V. 8 relates to a facsimile communication apparatus and a facsimile communication method capable of performing communication.
[0002]
[Prior art]
In 1994, in ITU-T, Recommendation V. 8 holds, and this V.8 is established. It is conceivable to apply the procedure specified in No. 8 to a facsimile machine.
[0003]
This V. As a facsimile apparatus to which the procedure according to V.8 is applied, V.V. The facsimile apparatus which supports the procedure and image transmission specified in 34 is targeted. Here, after that, 8, the V.I. Although there is a description of No. 17, communication is not clearly decided.
[0004]
[Problems to be solved by the invention]
If the transmitter is V. 34, supports ANSam signal from a receiver at the time of calling, and transmits a V.34 signal from a transmitter. When a CM signal specifying communication is transmitted, the receiver sends a V.34 signal. When receiving the JM signal instructed to communicate at V.17, the subsequent V.17 signal is clearly transmitted. 8 The communication procedure has not been determined.
[0005]
Therefore, V. 8 after performing the communication. 21 DIS signals, and V.21 signals. 8 with the reception function, and when the CI signal is transmitted, 17 There is a problem that communication may not be established. That is, the receiver may malfunction.
[0006]
In the present invention, the transmitter uses 34, supports ANSam signal from a receiver at the time of calling, and transmits a V.34 signal from a transmitter. When a CM signal specifying communication is transmitted, the receiver sends a V.34 signal. When receiving a JM signal instructed that communication is not possible, the V.34 communication is not changed. Since there is no malfunction due to the execution of the 8 protocol, the line can be disconnected immediately and the communication can be cut off. It is an object of the present invention to provide a communication device and a facsimile communication method.
[0007]
[Means for Solving the Problems]
The present invention is based on the ITU-T Recommendation V.2 between the destination device. A facsimile communication apparatus for executing an image transmission mode executable with the destination apparatus based on the above procedure, an ANSam signal receiving means for receiving an ANSam signal, A CM signal transmitting means for transmitting a ANSam signal; 34, a CM signal designating the communication is transmitted, and the receiver receives the V.34 signal. And a control means for interrupting the communication when receiving the JM signal indicating that the communication of the V.34 is not possible. 34, a re-call that has received a JM signal for which communication is not possible and communication has been disconnected will not be transmitted in response to the ANSam signal but will be transmitted to the V.34 signal without transmitting a CM signal. 21 upon reception of the DIS signal of V.21. 21, protocol V.21. 17, or V.I. 29, or V.I. This is a facsimile communication device that executes 27ter high-speed communication.
[0008]
Embodiments and Examples of the Invention
[First Embodiment]
First, V.1 recommended by the ITU-T. The procedure signal No. 8 will be described.
[0009]
V. The procedure signal No. 8 includes a calling menu signal (hereinafter, referred to as “CM”), a CM terminator (hereinafter, referred to as “CJ”), and a common menu signal (hereinafter, referred to as “JM”). I have.
[0010]
The signal CM is a signal transmitted from the calling DCE, and the signal CM is mainly used for indicating a modulation scheme available in the calling DEC. The signal CM is described in Recommendation V. 21 defined in the low-frequency channel V.21. It consists of a 300-bit / s repetitive bit string modulated by 21 (L).
[0011]
The signal CJ is a signal indicating that the JM has been detected and the end of the CM. The signal CJ has a V.I. of 300 bits / s. It is modulated by 21 (L), and is composed of three consecutive "0" octets including a start bit / s and a stop bit / s.
[0012]
The signal JM is a signal transmitted from the response DEC, and this JM signal is mainly used to indicate an available modulation scheme common to the calling and the response DEC. The signal JM is in accordance with Recommendation V. High-frequency channel V.21 defined in FIG. It consists of a 300 bit / s repetitive bit string modulated by 21 (H).
[0013]
Next, the encoding format of each of the CM, CJ, and JM signals will be described.
[0014]
FIG. 8 is a diagram illustrating a configuration of a preamble included in a procedure signal of FIG.
[0015]
A common encoding format is used for CM, CJ, and JM, and each signal CM, CJ, and JM is composed of a repeating bit sequence. As shown in FIG. 7, one sequence is composed of 10 "1" s at the beginning, a 10-bit synchronization code that follows, and octets that carry information that follows. Each octet has a preceding start bit ("0") and a subsequent stop bit ("1") added thereto.
[0016]
The same V.V. Recommendation T.21 using H.21 (H) modulation. In order to avoid confusion with 30, a bit constraint is imposed on the bit arrangement such that the HDLC flag (01111110) never appears.
[0017]
Each octet belongs to one information category. This coding format allows the information category to be extended for special applications if the simplicity of the signal is preserved by the majority of applications.
[0018]
The first information category in a sequence must be the calling function. In the information categories that follow it, no particular order is defined. All information within a category is conveyed in one octet or, if necessary, one ordered octet sequence.
[0019]
Next, the category octet will be described.
[0020]
FIG. 8 shows ITU-T Recommendation V. 8 is a diagram showing a category octet form for determining an information category of a procedure signal of No. 8. FIG.
[0021]
The category octet is the first octet to be generated in a new information category, and includes a 4-bit code that determines the information category.
[0022]
This format is configured as follows, and the indicated bits are transmitted from left to right.
[0023]
Start bit (0) b0 b1 b2 0 10 b6 b7 Stop bit (1)
As shown in FIG. 8, bits b0 to b3 form a category in which b0 is the least significant bit, and bit b4 is set to "0" so that the flag is not established. B5 to b7 are option bits of the information category.
[0024]
If three option bits are not sufficient to represent a particular category, any number of extended octets can immediately follow the category octet.
[0025]
The format of this extended octet is configured as shown below.
[0026]
Start bit (0) b0 b1 b2 0 10 b6 b7 Stop bit (1)
Bits b0 to b2, b6, and b7 are five bits added to the category at that time. Bit b4 is set to "1" to distinguish extended octets from category octets, and bits b3 and b5 are set to "0" so that the flag does not hold.
[0027]
Next, the calling category, modulation mode, protocol, and GSTN access, which are information categories determined by bits b0 to b3, will be described with reference to FIGS. 9 to 13, respectively.
[0028]
FIG. 9 is a diagram showing an example of using bits of the calling function octet.
[0029]
Three option bits in the calling function octet are used to specify a particular calling function, as shown in FIG.
[0030]
FIG. 10 shows ITU-T Recommendation V. FIG. 14 is a diagram showing a modulation mode designated by a procedure signal of No. 8;
[0031]
A V-series modulation mode that can be used in the GSTN is specified by three codes as shown in FIG. The setting to be available is limited only if the modulation mode is available in the displayed calling function and if one wishes to communicate the capability to the remote DCE.
[0032]
FIG. 11 shows ITU-T Recommendation V. 8 is a diagram illustrating a list of codes in a protocol category in a procedure signal of No. 8. FIG.
[0033]
A list of codes in the protocol category is shown in FIG. If the LAPM protocol code is indicated by CM, and the responding DCE receiving the same wants to use LAPM, the JM also displays the protocol octet indicating LAPM.
[0034]
FIG. 8 is a diagram illustrating a code indicating a cellular access connected to the GSTN of a procedure signal of No. 8. FIG.
[0035]
The code indicating the cellular access connecting to the GSTN is shown in FIG.
[0036]
Next, V. The information bits of INFO0 specified in 34 will be described.
[0037]
FIG. 34 is a diagram illustrating bit definitions of an INFO0 sequence of No. 34. FIG.
[0038]
INFO0 is a signal used to indicate the transmission capability, and the bits of the signal sequence are defined as shown in FIG.
[0039]
In the above embodiment, INFO0a is a signal transmitted from the called side, and INFO0c is a signal transmitted from the calling side.
[0040]
Next, a first embodiment of the present invention will be described.
[0041]
FIG. 1 is a block diagram showing a configuration of a facsimile machine FS1 according to a first embodiment of the present invention.
[0042]
The facsimile machine FS1 includes a network control device (hereinafter, referred to as NCU) 2 connected to a telephone line 2a. The NCU 2 controls connection of a telephone switching network, such as connecting a telephone network to a line terminal for use in data communication and the like, and switches to a data communication path, and connects the telephone line 2a to the telephone 4; The connection between the telephone line 2a and the hybrid circuit 6 is selectively switched.
[0043]
NCU 2 and telephone 4 are connected by signal line 2b, and NCU 2 and hybrid circuit 6 are connected by signal line 2c. The switching operation of the NCU 2 is controlled by a control circuit 20 described later. When the control signal provided from the control circuit 20 via the signal line 20a is "0", the connection between the telephone line 2a and the telephone 4 is established. On the other hand, when the control signal is "1", the connection between the telephone line 2a and the hybrid circuit 6 is established. In the normal state, the connection between the telephone line 2a and the telephone 4 is selected.
[0044]
The hybrid circuit 6 separates a transmission signal from the transmission system transmitted via the telephone line 2a from a reception signal to the reception system received via the telephone line 2a.
[0045]
The transmission system includes a reading circuit 14 including an imaging device such as a CCD (Electrically Coupled Device) and an optical system, and an ANSam transmission circuit 10.
[0046]
The reading circuit 14 sequentially reads one line of image in the main scanning direction from the transmission document, and data indicating the read image is output to a signal line 14a.
[0047]
The ANSam sending circuit 10 outputs an ANSam signal to the signal line 10a when a signal of level "1" is given from the control circuit 20 via the signal line 20d. On the other hand, when a signal of level “0” is supplied from the control circuit 20 via the signal line 20d, the ANSam signal is not output to the signal line 10a.
[0048]
The data output from the reading circuit 14 via the signal line 14a is supplied to the control circuit 20. The control circuit 20 encodes the data taken in via the signal line 14a, and outputs the encoded data to the modem 8 via the signal line 20b.
[0049]
The modulator / demodulator 8 modulates the coded data from the signal line 20b to generate a modulated signal, and demodulates the received signal taken in from the hybrid circuit 6 via the signal line 6a. Generate This modulation processing and demodulation processing are described in ITU-T Recommendation V. 8, V.I. 21, V.I. 27ter, V.I. 29, V.I. 17, V.I. 34. The contents of the modulation and demodulation processing by the modulator / demodulator 8 are specified by a signal provided from the control circuit 20 via the signal line 20c, and the transmission mode is determined by the specified modulation and demodulation processing.
[0050]
The modulation signal generated by the modulator / demodulator 8 is supplied to the addition circuit 12 via the signal line 8a. The addition circuit 12 adds the modulation signal from the modem 8 and the ANSam signal from the ANSam transmission circuit 10. The added signal is output to the hybrid circuit 6 via the signal line 12a, and the hybrid circuit 6 sends the added signal as a transmission signal to the telephone line 2a via the NCU 2.
[0051]
On the other hand, in the receiving system, a signal received from the partner device via the NCU 2 is output from the hybrid circuit 6 to the modem 8 via the signal line 6a. As described above, the modulator / demodulator 8 demodulates the received signal captured via the signal line 6a to generate demodulated data. Demodulated data generated by the modulator / demodulator 8 is supplied to the control circuit 20 via the signal line 8b. The control circuit 20 performs processing such as decoding of the demodulated data, and the decoded data is provided to the recording circuit 16 via the signal line 20e.
[0052]
The recording circuit 16 sequentially records the image indicated by the decoded data line by line on a recording sheet.
[0053]
The data read by the reading circuit 14, the data obtained by encoding the data, the received data, and the data obtained by decoding the data are stored in the memory circuit 18 as necessary.
[0054]
The control circuit 20 receives information from the partner device and performs transmission control for transmitting information to the partner device.
[0055]
The transmission control procedure that defines this transmission control includes ITU-T Recommendation V. 8, V.I. 21, V.I. 27ter, V.I. 29, V.I. 17, V.I. 34 procedures are used.
[0056]
Specifically, the ITU-T Recommendation V.4 communicates with the destination device. 8. A facsimile apparatus FS1 for executing a procedure specified in No. 8 and setting an image transmission mode executable with the destination apparatus based on the procedure, comprising an ANSam signal receiving unit and a CM signal transmitting unit. , After receiving the ANSam signal. 34, a CM signal designating the communication is transmitted, and the receiver receives the V.34 signal. When a JM signal indicating that the communication of 34 is not possible is received, the communication is interrupted.
[0057]
Here, the V.V. When a JM signal indicating that communication is impossible at 34 is received, the line is disconnected without transmitting a CJ signal. The JM signal from the partner receiver is 21 communication is possible, and at least V.21 communication is possible. 17, or V.I. 29, or V.I. It is assumed that any one of the 27ter communication is possible.
[0058]
Then, V.P. A re-call that has received a JM signal indicating that communication is not possible and communication has been interrupted is called V.34. 8 without performing the procedure. 21, protocol V.21. 17, or V.I. 29, or V.I. Execute 27 ter high-speed communication.
[0059]
Specifically, the V.V. 34, a re-call that has received a JM signal for which communication is not possible and communication has been disconnected will not be transmitted in response to the ANSam signal but will be transmitted to the V.34 signal without transmitting a CM signal. 21 upon reception of the DIS signal of V.21. 21, protocol V.21. 17, or V.I. 29, or V.I. Execute 27 ter high-speed communication.
[0060]
2, 3, and 4 are flowcharts showing the operation of the above embodiment.
[0061]
In S2, a signal of level "0" is output to the signal line 20a to turn off the CML. In S4, a signal of level "0" is output to the signal line 20d, so that the ANSam signal is not output. .
[0062]
Next, in S6, it is determined whether or not a call is selected. If the call is not selected, the process proceeds to step S8, and if the call is selected, the process proceeds to step S10.
[0063]
In S8, other processing is executed, and after performing other processing, the process returns to step S2.
[0064]
In S10, a signal of level "1" is output to the signal line 20a to turn on the CML. In S12, the CI transmission FLG is set to 0. In S14, the calling circuit is used to call the designated destination. In S16, the pre-procedure is executed.
[0065]
In S18, it is determined whether or not the ANSam signal has been received. If the ANSam signal has been received, the process proceeds to step S24. If the ANSam signal has not been received, the process proceeds to step S20.
[0066]
In S20, V.V. It is determined whether or not the DIS signal of V.21 has been received. When the DIS signal of V.21 is received, the process proceeds to step S52, and If the DIS signal has not been received, the process proceeds to step S22.
[0067]
In S22, it is determined whether or not the reception timer of the initial identification signal has expired. If the reception timer of the initial identification signal has expired, the process proceeds to step S34, and the reception timer of the initial identification signal has expired. If not, the process proceeds to step S16.
[0068]
In S24, V.V. 21, V.I. 27ter, V.I. 29 half duplex, V.I. 17, V.I. A CM signal specifying half duplex communication is transmitted. 8 of the JM signal.
[0069]
In S28, a determination is made based on the received JM signal. 34, it is determined whether half-duplex communication is possible or not. If the half-duplex communication is possible, the process proceeds to step S30. If the half-duplex communication of 34 is not possible, the process proceeds to step S34.
[0070]
In step S30, the CJ signal is transmitted. In step S32, INFO0c is transmitted. In step S34, a signal of level "0" is output to the signal line 20a to turn off the CML. In step S36, a wait is performed for one minute. In step S38, the level "0" is output to the signal line 20a. 1 "is output, and the CML is turned on.
[0071]
In step S40, a call is made to the same destination using the calling circuit. In step S42, the pre-procedure is executed, and the ANSam signal is not received.
[0072]
In S44, V.V. It is determined whether or not the DIS signal of V.21 has been received. If the DIS signal has been received, the process proceeds to step S48, and If the DIS signal of No. 21 has not been received, the process proceeds to step S46.
[0073]
In S46, it is determined whether or not the reception timer of the initial identification signal has expired. If the reception timer of the initial identification signal has expired, the process proceeds to step S2, and the reception timer of the initial identification signal has expired. If not, the process proceeds to step S42.
[0074]
In S48, V.V. 21 is transmitted, and in S50, the V.21 signal is thereafter transmitted. 21, V.21 procedure. 27ter or V.I. 29, or V.I. 17 image transmission is executed.
[0075]
In S52, V.V. It is determined whether there is a receiving function of V.8. If there is a receiving function of V.8, the process proceeds to step S54, and If there is no receiving function of No. 8, the process proceeds to step S48.
[0076]
In S54, it is determined whether or not the CI transmission FLG is 0. If the CI transmission FLG is 0, the process proceeds to step S56, and if the CI transmission FLG is not 0, the process proceeds to step S48.
[0077]
In S56, 1 is set to the CI transmission FLG, and in S58, a CJ signal is transmitted.
[0078]
Next, from the above transmission control procedure, that is, from the reception of the ANSam signal from the called terminal, to the V.11. The procedure of step 34 and the transmission control procedure up to the execution of image transmission will be described.
[0079]
FIG. 5 is a diagram illustrating an example of a transmission control procedure applied to the facsimile machine FS1.
[0080]
Referring to FIG. 5, the called terminal transmits a signal (ANSam signal, which is a signal obtained by modulating 2100 Hz at 15 Hz) that enables full-duplex communication. From the calling side, 8, a CM signal is transmitted, and the CM signal notifies the called terminal of a transmission mode that can be executed during image transmission.
[0081]
The called terminal that has received the CM signal notifies the calling terminal of a receivable transmission mode (V.34) among the transmission modes specified by the CM signal, and the JM signal is used for this notification.
[0082]
The calling terminal that has received the JM signal notifies the called terminal of the transmission mode by transmitting the CJ signal.
[0083]
After transmitting the CJ signal, that is, After 50 msec elapses after the completion of procedure 8, the calling terminal returns to V.8. In step 34, execution of the procedure is started, and a line proofing signal (INFO0c is added at the head) for checking the status of the telephone line 2a is transmitted. The called terminal sends out a signal (prepended with INFO0a) in response to the line probing signal from the calling terminal, and uses this signal to send out the subsequent transmission level, amplitude level correction, and transmission baud rate. Notify the calling terminal.
[0084]
The calling terminal sends a long training signal 50 msec after sending the line proofing signal, and the called terminal adjusts the equalizer of the modem, detects the timing, etc. based on the long training signal. Is carried out.
[0085]
The calling terminal sends out a parameter exchange signal after 50 msec has elapsed since sending out the long training signal. The called terminal sends out a signal in response to the parameter exchange signal, and notifies the calling terminal of the subsequent link correction and bit rate using this signal.
[0086]
After responding to the parameter exchange signal, the called terminal sends the CSI and DIS signals, sends a flag until receiving the TSI and DCS signals from the calling terminal, and after receiving the TSI and DCS signals, sends the CFR signal. Is sent. After receiving the CSI and DIS signals, the calling terminal sends out TSI and DCS signals, and sends out a flag until it receives a CFR signal from the called terminal.
[0087]
After 50 msec elapses from the sending of the flag, the calling terminal returns to the V.110 terminal. The image transmission by the image signal is started and an image signal is transmitted. After a lapse of 50 msec from the end of the image signal transmission, V.V. 34, the calling terminal sends out the PPS-MPS signal, and sends out the flag until receiving the MCF signal from the called terminal. The called terminal sends an MCF signal after receiving the PPS-MPS signal.
[0088]
After a lapse of 50 msec from the transmission of the flag, the V.V. 34, the image signal is transmitted again from the calling terminal. After a lapse of 50 msec from the end of the image signal transmission, V.V. 34, the calling terminal sends out a PPS-EOP signal and sends out a flag until an MCF signal is received. The called terminal transmits an MCF signal after receiving the PPS-EOP signal. Thereafter, the same procedure as described above is repeated until the image transmission ends.
[0089]
Next, in the above embodiment, the reception of the ANSam signal from the called terminal causes 8 in the procedure of V.8. 34 communication is not possible, the line is disconnected, and in the case of a re-call, V.34 does not respond to the ANSam signal. 21 for the DIS signal. A transmission control procedure for transmitting the 21 DCS signal will be described.
[0090]
FIG. 6 is a diagram showing another example of the transmission control procedure applied to the facsimile apparatus FS1.
[0091]
Referring to FIG. 6, first, the called terminal transmits ANSam, and the calling terminal transmits the ANSam. 34, and transmits a communicable CM signal. At this time, after receiving the CM signal, the receiver sets the V.V. A JM signal that allows 17 communication (V.34 communication not possible) is transmitted. In the first embodiment, the calling terminal immediately disconnects the line (at the timing (1) in FIG. 6) based on the reception of the JM signal.
[0092]
Thereafter, after a predetermined time elapses, the call is re-issued, and the V.V. 21 for the DIS signal. 21 is transmitted, and the V.21 TSI / DCS signal is transmitted. 21 procedures, V.I. 27ter or V.I. 29, or V.I. Execute 17-image transmission.
[0093]
[Second embodiment]
The second embodiment of the present invention is the same as the first embodiment, except that V.V. In this embodiment, when a JM signal indicating that communication is impossible is received, a line is disconnected after transmitting a CJ signal.
[0094]
That is, the line is disconnected at the timing of (2) in FIG. 6, and the sequence shifts to a recalling sequence.
[0095]
FIG. 14 is a flowchart showing the operation of the second embodiment of the present invention.
[0096]
FIG. 14 is a flowchart showing only operations different from the flowcharts shown in FIGS.
[0097]
S60 represents NO in Step S28, and S62 represents NO in Step S28. 8 represents the transmission of the CJ signal.
[0098]
S64 represents step S34.
[0099]
[Third embodiment]
The third embodiment of the present invention is the same as the first embodiment, except that V.V. When a JM signal is received, the communication of which is not possible, a CJ signal is transmitted, and a V.34 signal from the other receiver is transmitted. In this embodiment, the line is disconnected after receiving the DIS signal 21.
[0100]
That is, at the timing of (3) in FIG. 6, the line is disconnected, and the sequence shifts to a recalling sequence.
[0101]
FIG. 15 is a flowchart showing the operation of the third embodiment.
[0102]
FIG. 15 is a flowchart showing only different portions of the control operations shown in FIGS.
[0103]
S70 indicates NO in S28, and S72 indicates V. 8 is transmitted, and in S74, V.8 is transmitted. 21 represents the reception of the DIS signal, and S76 represents S34.
[0104]
[Fourth embodiment]
The fourth embodiment of the present invention is the same as the first embodiment, except that V.V. When receiving the JM signal indicating that the communication of No. 34 is not possible, the CJ signal is transmitted and the V.34 signal is transmitted from the other receiver. 21 is received and the V.21 signal is received. In this embodiment, the line is disconnected after transmitting the DCN signal of No. 21.
[0105]
That is, in the fourth embodiment, the line is disconnected at the timing of (4) in FIG. 6, and the sequence shifts to a recalling sequence.
[0106]
FIG. 16 is a flowchart showing the operation of the fourth embodiment.
[0107]
FIG. 16 shows only operations different from the control operations shown in FIGS. 2 to 4.
[0108]
S80 represents NO in S28, and S82 represents V.N. 8 represents the transmission of the CJ signal of S.8. 21 represents the reception of the DIS signal. 21 represents the transmission of the DCN signal, and S88 represents S34.
[0109]
【The invention's effect】
Claim 1,7According to the described invention, the transmitter is a V.S. 34, supports ANSam signal from a receiver at the time of calling, and transmits a V.34 signal from a transmitter. When a CM signal specifying communication is transmitted, the receiver sends a V.34 signal. When receiving a JM signal instructed that communication is not possible, the V.34 communication is not changed. Since there is no malfunction by executing the 8 protocol, the line can be disconnected immediately and the communication can be disconnected. Even though the communication is not possible, the communication is continued and the communication cost is increased without increasing the communication cost. The effect of being easyAnd the transmitter is V. 34, supports ANSam signal from a receiver at the time of calling, and transmits a V.34 signal from a transmitter. When a CM signal specifying communication is transmitted, the receiver sends a V.34 signal. When a JM signal instructing that communication is impossible is received, the line is disconnected at a predetermined timing. 8 without transmitting the CM signal of V.8. 21 can respond to the DIS signal. 21, protocol V.21. 17, or V.I. 29, or V.I. 27ter high-speed communication can be performed..
[0110]
Claim 2,8According to the described invention, the transmitter is a V.S. 34, supports ANSam signal from a receiver at the time of calling, and transmits a V.34 signal from a transmitter. When a CM signal specifying communication is transmitted, the receiver sends a V.34 signal. 34 When a JM signal instructing that communication is not possible is received, the line can be immediately disconnected and communication can be cut off, so that communication is continued despite communication being impossible and communication costs increase. There is an effect that there is nothing.
[0111]
Claim 3,9According to the described invention, the transmitter is a V.S. 34, supports ANSam signal from a receiver at the time of calling, and transmits a V.34 signal from a transmitter. When a CM signal specifying communication is transmitted, the receiver sends a V.34 signal. 34 When receiving a JM signal instructed that communication is not possible, after transmitting a CJ signal, the line can be disconnected and the communication can be disconnected. Communication is continued without increasing communication costs. When a modem or the like automatically executes step 8, the line is disconnected after transmitting the CJ signal, so that there is an effect that control is easy.
[0112]
Claim 4,10According to the described invention, the transmitter is a V.S. 34, supports ANSam signal from a receiver at the time of calling, and transmits a V.34 signal from a transmitter. When a CM signal specifying communication is transmitted, the receiver sends a V.34 signal. When receiving a JM signal instructed that communication is not possible, after transmitting a CJ signal, After receiving the DIS signal of No. 21, the line can be disconnected to disconnect the communication, so that the communication is continued even though the communication is not possible, and the communication cost is not increased. Since the transition has been made to 21 protocols, the effect is obtained that the initial identification timer times out and the line can be disconnected without fail.
[0113]
Claim 5,11According to the described invention, the transmitter is a V.S. 34, supports ANSam signal from a receiver at the time of calling, and transmits a V.34 signal from a transmitter. When a CM signal specifying communication is transmitted, the receiver sends a V.34 signal. When receiving a JM signal instructed that communication is not possible, after transmitting a CJ signal, 21 after receiving the DIS signal of V.21. After transmitting the DCN signal of No. 21, the line is disconnected and the communication is disconnected, so that the communication is continued even though the communication is not possible, the communication cost is not increased, and the receiver is easy to use. V. 21 protocol. Since the DCN signal of No. 21 is received, it is possible to immediately shift to the line disconnection.
[0114]
Claim 6,12According to the invention described in the description, 8 has an effect that the JM signal is clear and the design is easy.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a facsimile machine FS1 according to a first embodiment of the present invention.
FIG. 2 is a flowchart showing the operation of the embodiment.
FIG. 3 is a flowchart showing the operation of the embodiment.
FIG. 4 is a flowchart showing the operation of the embodiment.
FIG. 5 is a diagram showing an example of a transmission control procedure applied to the facsimile apparatus FS1.
FIG. 6 is a diagram showing another example of the transmission control procedure applied to the facsimile apparatus FS1.
FIG. 7: ITU-T Recommendation V. 8 is a diagram illustrating a configuration of a preamble included in a procedure signal of FIG.
FIG. 8: ITU-T Recommendation V. 8 is a diagram showing a category octet form for determining an information category of a procedure signal of No. 8. FIG.
FIG. 9 is a diagram showing an example of using bits of a calling function octet.
FIG. 10: ITU-T Recommendation V. FIG. 14 is a diagram showing a modulation mode designated by a procedure signal of No. 8;
FIG. 11: ITU-T Recommendation V. 8 is a diagram illustrating a list of codes in a protocol category in a procedure signal of No. 8. FIG.
FIG. 12: ITU-T Recommendation V. 8 is a diagram illustrating a code indicating a cellular access connected to the GSTN of a procedure signal of No. 8. FIG.
FIG. 13 is a diagram illustrating the V.1 standard according to the ITU-T recommendation. 34 is a diagram illustrating bit definitions of an INFO0 sequence of No. 34. FIG.
FIG. 14 is a flowchart showing the operation of the second embodiment of the present invention.
FIG. 15 is a flowchart showing the operation of the third embodiment.
FIG. 16 is a flowchart showing the operation of the fourth embodiment.
[Explanation of symbols]
FS1: facsimile machine,
4: Phone,
10 ... ANSam sending circuit,
14 ... Reading circuit,
16. Recording circuit,
18. Memory circuit,
20: control circuit.

Claims (12)

ITU-T recommendation V.1 8. A facsimile communication apparatus that executes a procedure specified in 8 and sets an image transmission mode executable with the destination apparatus based on the procedure.
ANSam signal receiving means for receiving an ANSam signal;
CM signal transmitting means for transmitting a CM signal;
After receiving the ANSam signal, 34, a CM signal designating the communication is transmitted, and the receiver receives the V.34 signal. Control means for interrupting communication when receiving a JM signal indicating that communication is impossible in 34;
, And the V.V. 34, a re-call that has received a JM signal for which communication is not possible and communication has been disconnected will not be transmitted in response to the ANSam signal but will be transmitted to the V.34 signal without transmitting a CM signal. 21 upon reception of the DIS signal of V.21. 21, protocol V.21. 17, or V.I. 29, or V.I. 27. A facsimile communication device for executing high-speed communication. In claim 1,
The above receiver. 34. The facsimile communication apparatus according to 34, wherein upon receiving a JM signal incapable of communication, the line is disconnected without transmitting a CJ signal. In claim 1,
The above receiver. 34. A facsimile communication apparatus according to 34, wherein upon receiving a JM signal in which communication is not possible, a CJ signal is transmitted and then the line is disconnected. In claim 1,
The above receiver. 34, when a JM signal is received, the communication of which is not possible, a CJ signal is transmitted, and the V.34 signal from the partner receiver is transmitted. 21. A facsimile communication apparatus, wherein the line is disconnected after receiving the DIS signal. In claim 1,
The above receiver. 34, when a JM signal is received, the communication of which is not possible, a CJ signal is transmitted, and the V.34 signal from the partner receiver is transmitted. 21 is received and the V.21 signal is received. 21. A facsimile communication apparatus wherein the line is disconnected after transmitting the DCN signal of No. 21. In any one of claims 1 to 5,
The JM signal from the other receiver is transmitted to the VM. 21 communication is possible. 17, V.I. 29, V.I. A facsimile communication device capable of performing any one of 27 ter communications. ITU-T recommendation V.1 8. A facsimile communication method for executing a procedure specified in 8 and setting an image transmission mode executable with the destination apparatus based on the procedure,
An ANSam signal receiving step of receiving an ANSam signal;
Transmitting a CM signal for transmitting a CM signal;
After receiving the ANSam signal, 34, a CM signal designating the communication is transmitted, and the receiver receives the V.34 signal. A control step of interrupting communication upon receiving a JM signal indicating that communication is disabled in 34;
, And the V.V. 34, a re-call that has received a JM signal for which communication is not possible and communication has been disconnected will not be transmitted in response to the ANSam signal but will be transmitted to the V.34 signal without transmitting a CM signal. 21 upon reception of the DIS signal of V.21. 21, protocol V.21. 17, or V.I. 29, or V.I. A facsimile communication method comprising performing 27 ter high-speed communication. In claim 7 ,
The above receiver. 34. The facsimile communication method according to 34, wherein upon receiving a JM signal for which communication is impossible, the line is disconnected without transmitting a CJ signal. In claim 7 ,
The above receiver. 34. A facsimile communication method according to claim 34, wherein upon receiving a JM signal in which communication is impossible, a CJ signal is transmitted and then the line is disconnected. In claim 7 ,
The above receiver. 34, when a JM signal is received, the communication of which is not possible, a CJ signal is transmitted, and the V.34 signal from the partner receiver is transmitted. 21. A facsimile communication method characterized by disconnecting the line after receiving the DIS signal. In claim 7 ,
The above receiver. 34, when a JM signal is received, the communication of which is not possible, a CJ signal is transmitted, and the V.34 signal from the partner receiver is transmitted. 21 is received and the V.21 signal is received. 21. A facsimile communication method characterized by disconnecting the line after transmitting the DCN signal of No. 21. In any one of claims 7 to 11 ,
The JM signal from the other receiver is transmitted to the VM. 21 communication is possible. 17, V.I. 29, V.I. A facsimile communication method, wherein any one of 27 ter communication is possible.

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