KR0170469B1 - Communication apparatus - Google Patents

Abstract

The present invention can define the presence or absence of an option signal, such as a password signal PWM, subaddress signal SUB, and select polling signals SEP, in communication between a transmitting station and a receiving station, thereby providing an error operation. It relates to a facsimile device that prevents. The digital transmission command signal DTC notifies the remote station whether the transmission command signal includes the password signal PWM and the selection polling signal SEP. The digital command signal DCS notifies the remote station whether the received command signal includes the password signal PWM and the subaddress signal SUB.

Description

Communication device

1 is a block diagram showing the configuration of a fax machine according to an embodiment of the present invention.

2 is a flowchart showing operation of the first embodiment of the present invention.

3 is a flow chart showing the operation of the first embodiment of the present invention.

4 is a flowchart showing operation of the first embodiment of the present invention.

5 is a flowchart showing operation of the first embodiment of the present invention.

6 is a flowchart showing operation of the first embodiment of the present invention.

7 is a flowchart showing operation of the third embodiment of the present invention.

8A and 8B are charts showing the transmission and reception of the procedure signals of the first embodiment.

9A and 9B show block diagrams showing the configuration of a fax machine according to a fifth embodiment of the present invention.

10A and 10B show a flowchart for explaining the operation of the fifth embodiment.

11 is a flowchart showing operation of the fifth embodiment.

12 is a flowchart showing operation of the fifth embodiment.

FIG. 13 is a flowchart showing operation of the fifth embodiment. FIG.

14 is a flowchart showing operation of the fifth embodiment.

FIG. 15 is a flowchart showing operation of the fifth embodiment. FIG.

FIG. 16 is a flowchart showing operation of the fifth embodiment. FIG.

FIG. 17 is a flowchart showing operation of the fifth embodiment. FIG.

18 is a flowchart showing operation of the fifth embodiment.

19A and 19B are charts showing the transmission and reception of the procedure signals of the fifth embodiment.

20A and 20B show a block diagram showing a configuration of a fax machine according to a sixth embodiment.

21 is a flowchart showing operation of the sixth embodiment.

FIG. 22 is a flowchart showing operation of the sixth embodiment. FIG.

FIG. 23 is a flowchart showing operation of the sixth embodiment.

24 is a flowchart showing operation of the sixth embodiment.

25 is a flowchart showing operation of the sixth embodiment.

FIG. 26 is a flowchart showing operation of the sixth embodiment.

27A, 27B and 27C are charts showing the transmission and reception of the procedure signals of the sixth embodiment.

28 is a flowchart showing operation of the sixth embodiment.

29 is a flowchart showing operation of the sixth embodiment.

30 is a flowchart showing operation of the sixth embodiment.

FIG. 31 is a flowchart showing operation of the sixth embodiment.

32 is a flowchart showing operation of the sixth embodiment.

33A, 33B and 33C are charts showing the transmission and reception of the procedure signals of the sixth embodiment.

34 is a flowchart showing operation of the seventh embodiment.

35 is a flowchart showing operation of the seventh embodiment.

36 is a flowchart showing operation of the seventh embodiment.

37 is a flowchart showing operation of the seventh embodiment.

38 is a block diagram showing a configuration of a fax machine according to a twelfth embodiment.

39 is a flowchart showing operation of the twelfth embodiment.

40 is a flowchart showing operation of the twelfth embodiment.

FIG. 41 is a flowchart showing operation of the twelfth embodiment. FIG.

42 is a flowchart showing operation of the twelfth embodiment.

43 is a flowchart showing operation of the twelfth embodiment.

44 is a flowchart showing operation of the twelfth embodiment.

45 is a flowchart showing operation of the twelfth embodiment.

46A, 46B and 46C are charts showing the transmission and reception of the procedure signals of the twelfth embodiment.

47A-48B are charts showing transmission and reception of conventional procedure signals.

* Explanation of symbols for main parts of the drawings

2: NCU 4: Phone

6: hybrid circuit 8, 14: modulator

10: readout circuit 12, 24: encode circuit

16: addition circuit 18, 20: demodulator

22: decode circuit 26: memory circuit

28: recording circuit 30: receiving data storage designation key

32: Receive data storage designation lamp 34: Store data output key

36: control circuit 38: memory circuit

40: decode / variable-enlarge / encode circuit 42: memory box numbering key

44: Memory polling selection key 46: Memory polling assignment lamp

48: password transmission selection key 50: password transmission designation lamp

52: password register 54: operation unit

The present invention relates to multiframe transmission in the pre-procedure of faxes.

The invention also relates in particular to a fax machine having the function of transmitting a sub-address signal, a password signal and a selective polling signal.

Recently, the subaddress signal SUB, the password signal PWD and the select polling signal SEP have been added as standard signals of the ITU-T addition recommendation.

Currently, in the ITU Recommendations, the 47th bit in the FIF of DIS / DTC is assigned to the declaration of the presence or absence of selective polling capability, and the 49th bit to the 50th declaration of the presence or absence of subaddress capability. Bits are assigned to the declaration of the presence or absence of password capabilities. In practice, the 47th, 49th and 50th bits of the DTC are all set to 0 because the presence or absence of performance can be indicated using only the bits of DIS. For DCS, their 47th, 49th and 50th bits are all set to zero.

In the present situation, the following three problems (1)-(3) are included. The above problems will be described with reference to FIGS. 47A to 48B.

(1) In FIG. 47A, first, the receiving station (called side) declares that it is ready to receive SEP, SUB, and PWD by DIS. In response, the transmitting station (calling side) transmits the PWD / SUB / DCS. When the receiving station correctly receives only DCS (when an error occurs during transmission of the PWD and SUB via the line), the receiving station determines that the transmitting station has not sent either the PWD or the SUB. Degree)

Thus, while the receiving station performs the receiving process under the assumption that neither PWD nor SUB has been sent, the transmitting station transmits image data according to the transmitted PWD / SUB. As a result, a transmission / reception error occurs between the transmitting station and the receiving station.

(2) In FIG. 48A, the polling transmitting station (the called party) first declares that it is ready to receive SEP, SUB and PWD by DIS. In response, the polling receiving station (called party) transmits PWD / SEP / DTC. When the polling receiving station only correctly receives the DTC (an error occurs when transmitting the PWD and SEP over the line), the receiving station determines that the polling sending station has not sent either the PWD or the SEP. 48b degrees)

Thus, while the polling transmitting station performs the polling transmission process under the assumption that neither PWD nor SEP is sent, the polling receiving station performs polling reception for image data according to the transmitted PWD / SEP. As a result, a transmission / reception error occurs between the polling receiving station and the transmitting station.

(3) The ITU-T Supplemental Recommendation decided to use the 47th, 49th, and 50th bits of the DTC for selective polling capability, subaddress performance, and password performance, respectively. However, using them is not limited.

(4) Also, when the transmitting station transmits two signals and when the receiving station receives only the DCS signal, for example, to determine a specific mode by means of the NSS signal and the DCS signal, the receiving station and the transmitting stations may Is in a different state of the interpreted mode. As a result, there is a disadvantage of an error-prone operation. For example, when the standard and fine modes are determined by the DCS signal, and when the super fine mode is determined by the NSS signal, in the above case, the transmitting station and the transmitting stations are line intensity) is in a different state. This causes a problem in stretched image recording.

It is an object of the present invention to improve a communication device.

It is still another object of the present invention to provide a communication apparatus using a fax procedure that can effectively prevent an error operation inferred from failure of an option signal reception.

1 is a block diagram showing a first embodiment of the present invention.

The network control unit (NCU) 2 controls the connection to the telephone exchange network, switches to the data communication channel, maintains a loop, and connects to terminals on the line for data communication and the like throughout the telephone network. Connected. In addition, the NCU 2 connects the telephone line 2a to the telephone set 4 when the signal level (signal line 36a) from the control circuit 36 is 0, and when the signal level is 1, the telephone line ( 2a) is connected to the fax machine side. In the normal state, the telephone line 2a is connected to the direction of the telephone 4.

The hybrid circuit 6 separates the signals of the sending system from the receiving system, transmits the transmission signal from the adder circuit 16 to the telephone line 2a via the NCU 2 and The signal is received from the calling station through the NCU 2 and is transmitted to the V29 demodulator 20 and the V21 demodulator 18 through the signal line 6a.

The V21 modulator 8 performs modulation in accordance with known ITU-T Recommendation V21. The V21 modulator modulates a procedure signal (signal line 36b) coming from the control circuit 36 and transmits the modulated signal to the adder circuit 16 via the signal line 8a.

The reading circuit 10 reads an image signal for one line in the main scanning direction in order from a document for transmission, and generates a signal string representing a black and white binary number. The data is transmitted to the encoding circuit 12 via the signal line 10a. The readout circuit 10 includes an image pickup element such as a CCD (charge coupled device) and an optical system. Here, the read circuit 10 reads in the standard mode when the signal 0 is output to the signal line 36c, reads in the fine mode when the signal 1 is output, and reads in the super fine mode when the signal 2 is output. Perform.

The encode circuit 12 includes read data output to the signal line 10a, encodes the read data (MH or MR encoding), and outputs the encoded data through the signal line 12a.

V27ter or V29 modulator 14 accepts encoded data from signal line 12a and is in accordance with known ITU-T recommendation V27ter (differential phase modulation) or V29 (quadrature modulation). The coded data is modulated and the modulated data is output to the adder circuit 16 via the signal line 14a.

Adder circuit 16 sums the outputs from modulators 8 and 14. The output from the adder circuit 16 is sent to the hybrid circuit 6.

V21 demodulator 18 performs demodulation according to known ITU-T Recommendation V21. The demodulator 18 accepts the procedure signal from the hybrid circuit 6, performs V21 demodulation on the procedure signal, and transmits demodulated data to the control circuit 36 via the signal line 18a.

V27ter or V29 demodulator 20 performs demodulation according to known ITU-T Recommendations V27ter or V29. The demodulator 20 accepts the modulated image signal from the hybrid circuit 6, demodulates the image signal, and transmits the demodulated data to the decode circuit 22 via the signal line 20a.

The decode circuit 22, when a signal having a signal level 0 is output to the signal line 36d, the data output to the signal line 20a, and when a signal having a signal level 1 is output to the signal line 36d. The data output to the signal line 26a is received. The decode circuit 22 outputs the decoded (MH or MR decoded) data to the encode circuit 24 or the write circuit 28 via the signal line 22a.

The encode circuit 24 accepts the signal output to the signal line 22a, performs MR encoding on the signal with K = 8, and sends the encoded data to the memory circuit 26 through the signal line 24a. Output

The memory circuit 26 stores the encoded data output to the signal line 24a under the control of the signal line 36e, and outputs the stored data to the decode circuit 22 via the signal line 26a.

The write circuit 28 is in the normal mode when the signal 0 is output to the signal line 36f, in the fine mode when the signal 1 is output, and in the super fine mode when the signal 2 is output, one signal line 22a. Accept the data printed in).

The received data storage designate key 30 is used at the transmitting station side to designate the receiving station side storing the received data in the memory. When the key 30 is pressed, a press signal is generated in the signal line 30a.

The received data storage designation lamp 32 is turned on when the transmitting station side interferes with the receiving station side storing the received data into the memory. Lamp 32 is turned off when a clear pulse is generated on signal line 36g. In turn, the lamp 32 alternately turns on and off each time a press pulse is generated in the signal line 30a. When the lamp 32 is turned off, a signal having a signal level of 0 is output to the signal line 32a. When the lamp 32 is turned on, a signal having a signal level 1 is output to the signal line 32a.

The stored data output key 34 is used to output the data stored in the memory circuit 26. When the key 34 is pressed, a press pulse is generated at the signal line 34a.

The control circuit 36 of the first embodiment executes control to inform the calling station by the digital command signal (DCS signal) whether the received command signal has a subaddress signal or a password signal. The receiving station receives a DCS signal indicating whether a subaddress signal or a password signal is included. If the designated subaddress signal or password signal is not received, the receiving station transmits the DIS group signal back to the calling station, and then performs response reception.

In this embodiment, the 47th, 49th and 50th bits of DIS and DCS are described as described below.

First, the 47th bit of DIS is allocated to indicate selective polling performance = SEP receive performance enabled, and the 49th bit of DIS is allocated to indicate subaddress performance = SUB receive performance enabled, and the 50th bit of DIS is allocated. Password Performance = PWD Receive Performance is assigned to indicate Enable.

The 47th bit of the DCS is fixed at zero. In addition, the 49th bit of the DCS is allocated to indicate whether the SUB signal has been transmitted. The 49th bit of the DCS is set to 1 when the SUB signal is transmitted and to 0 when it is not transmitted. In addition, the 50th bit of the DCS is allocated to indicate whether a PWD signal has been transmitted. The 50th bit of the DCS is set to 1 when the PWD signal is transmitted and to 0 when it is not transmitted.

Accordingly, the station receiving the DCS can check whether the SUB and PWD signals have been transmitted by checking the 49th and 50th bits of the received DCS. Thus, the assumption that an error is likely to occur as shown in FIG. 47B will not be made.

8A and 8B are sequence charts showing the procedure of this embodiment. 8A shows the procedure of this embodiment when the called station fails to receive SUB and PWD signals.

As shown, according to the procedure of this embodiment of FIG. 8A, since the 49th bit and the 50th bit of the DCS are all 1, the called station transmits SUB and PWD signals but the called station has failed to receive them. To judge. Therefore, after receiving the training signal (Tr) and the training check (TCF) signal, the called station transmits a DIS signal again.

Fig. 8B also shows the procedure of this embodiment when the calling station does not transmit any of the SUB and PWD signals.

According to the procedure of this embodiment of FIG. 8B, the receiving station determines that the calling station has not transmitted either the SUB and PWD signals because both the 49th and 50th bits of the DCS are zero. Therefore, after receiving the training (Tr) signal and the training check (TCF) signal, the called station transmits an acknowledgment for the received (CFR) signal to the calling station, and proceeds to image transmission.

Next, FIGS. 2 to 6 are flowcharts showing the operation of the control circuit 36 of this embodiment.

First, in step S42, the control circuit 36 outputs a signal having a signal level 0 to the signal line 36a in order to turn off the current mode logic circuit (CML). Next, in step S44, a clock pulse is generated on the signal line 36g in order to clear the received data storage designation ramp 32. In the present embodiment, when the lamp 32 is turned on, subaddress communication is designated.

In step S46, the control circuit 36 accepts the data output to the signal line 34a and determines whether the data output stored in the memory circuit 26 is selected. If the output is selected, the process proceeds to step S48, and if not, the process proceeds to step S50.

In step S48, the control circuit 36 outputs a signal having a signal level 1 to the signal line 36d, and outputs data stored in the memory circuit 26 via the signal line 36e. When writing is completed, the control circuit outputs a signal having a signal level of 0 to the signal line 36d.

In step S50, the control circuit 36 determines whether reception is selected. The control circuit proceeds to step S60 if reception is selected, and to step S52 if not selected.

In step S52, the control circuit 36 determines whether transmission is selected. The control circuit proceeds to step S116 if transmission is selected, and to step S54 if not selected.

In step S60, the control circuit 36 outputs a signal having a signal level 1 to the signal line 36a to turn on the CML. In step S62, the control circuit sets the timer T1 to 35 seconds.

In step S64, the control circuit 36 transmits an NSF / CSI / DIS signal. Here, the 47th bit (available for selective polling reception), the 49th bit (sub address receiving function possible) and the 50th bit (password receiving function enabled) of the DIS FIF (Facsimile Information Field) are all Is set.

In step S66, the control circuit 36 sets the timer T4 to 4.5 seconds for manual reception and 3 seconds for automatic reception. Next, in step S68, the control circuit determines whether a PWD / SUB / NSS / TSI / DCS signal is received. If these signals are received, the flow goes to step S72, and if not, the flow goes to step S70.

In step S70, the control circuit 36 determines whether a time out associated with the timer T4 has occurred. The control circuit proceeds to step S74 if a timeout has occurred, otherwise proceeds to step S68.

In step S72, the control circuit 36 determines whether a DCS signal has been received. If a DCS signal is received, the process proceeds to step S78, and if not, the process proceeds to step S74.

In step S74, the control circuit 36 determines whether a timeout associated with the timer T1 has occurred. The control circuit proceeds to step S76 if a time out has occurred, and to step S64 if no time out has occurred.

In step S76, the control circuit 36 outputs a signal having a signal level 0 to the signal line 36a in order to turn off the CML. Next, the control circuit returns to step S46.

In step S78, the control circuit 36 determines whether the 49th or 50th bit of the FIF of the DCS signal is one. If yes, go to step S80; otherwise, go to step S98.

In step S80, the control circuit 36 determines whether the 49th bit of the FIF of the DCS signal is 1 and the 50th bit is 0. That is, a check is made for a combination state where subaddress reception is specified and password reception is not specified. If yes, go to step S82. If no, go to step S92.

In accordance with the ITU-T promotion recommendation, the 47th, 49th, and 50th bits of the FIF of the DCS signal are all set to zero. However, according to this embodiment, when the 49th bit of the FIF of the DCS signal is 1, it indicates that the SUB signal is also transmitted in the multiframe; When the 49th bit is 0, it indicates that the SUB signal has not been transmitted in the multiframe. Further, when the 50th bit of the FIF of the DCS signal is 1, it indicates that the PWD signal is also transmitted in the multiframe; When the 50th bit is 0, it indicates that the PWD has not been transmitted in the multiframe. This embodiment follows the following rules.

In step S82, the control circuit 36 determines whether the SUB signal is received. When the SUB signal is received, the control circuit proceeds to step S84 and proceeds to the following sequential steps for the reception of the memory. When the SUB signal is not received, the control circuit determines that the SUB signal reception has failed, and returns to step S74.

In step S84, the control circuit 36 performs the remaining preliminary procedures. In step S86, the control circuit stores the data received via the signal line 36e in the memory circuit 26. Next, in step S88, the control circuit performs post-procedures. In step S90, in order to turn off the CML, the control circuit outputs a signal having the signal level 0 to the signal line 36a and returns to step S46.

In step S92, the control circuit 36 determines whether the 49th bit of the FIF of the DCS signal is 0 and the 50th bit is 1. In other words, the combination state where the sub address reception is not specified and the password reception is specified is checked. If yes, the control circuit proceeds to step S94. If no, the control circuit proceeds to step S112.

In step S94, the control circuit 36 determines whether a PWD signal is received. When the PWD signal is received, the control circuit proceeds to step S96. When the PWD signal is not received, the control circuit determines that the reception of the PWD signal has failed, and returns to step S74.

In step S96, the control circuit 36 determines whether the PWD signal set in the receiving station and the password match. The control circuit proceeds to step S98 if they match, and to step S106 if they do not match.

In step S98, the control circuit 36 performs the remaining preliminary procedures. In step S100, the control circuit receives and records the image signal. Next, in step S102, the control circuit performs a post procedure. In step S104, the control circuit outputs a signal having signal level 0 to the signal line 36a to turn off the CML, and returns to step S46.

In step S106, the control circuit 36 performs the remaining preliminary procedures. Here, the control circuit notifies that the communication is terminated due to the mismatch of the passwords. In step S108, the control circuit outputs a signal having a signal level 0 to the signal line 36a in order to turn off the CML. In step S110, the control circuit records in the communication result report that communication has ended due to a mismatch of passwords.

In step S112, the control circuit 36 determines whether the PWD signal is received. When the PWD signal is received, the control circuit proceeds to step S114. When the PWD signal is not received, the control circuit determines that the reception of the PWD signal has failed, and returns to step S74.

In step S114, the control circuit 36 determines whether the PWD signal set in the receiving station and the password match. If they match, the process goes to step S82, and if they do not match, the process goes to step S106.

In step S116, the control circuit 36 outputs a signal having a signal level 1 to the signal line 36a to turn on the CML. In step S118, the control circuit sets the timer T1 to 35 seconds.

In step S120, the control circuit 36 determines whether an NSF / CSI / DIS signal is received. If yes, go to step S126, and if not, go to step S122.

In step S122, the control circuit 36 determines whether a timeout associated with the timer T1 has occurred. If timeout has occurred, the process proceeds to step S124, and if not, returns to step S120.

In step S124, the control circuit 36 outputs a signal having a signal level 0 to the signal line 36a to turn off the CML, and returns to step S46.

In step S126, the control circuit 36 determines whether password communication is selected from the console unit (not shown). If password communication is selected, the process proceeds to step S128, and if not selected, the process proceeds to step S137.

In step S128, the control circuit 36 determines whether the 50th bit of the FIF of the DIS signal is 1, that is, the password reception function is available. If yes, the process proceeds to step S136. If no, the process proceeds to step S130.

In step S130, the control circuit 36 performs the remaining cast-procedures. Here, the control circuit notifies that password communication is impossible. In step S132, the control circuit outputs a signal having a signal level 0 to the signal line 36a in order to turn off the CML. In step S134, the control circuit records in the communication result report that password communication is not possible, and returns to step S46.

In step S136, the control circuit 36 sets the fiftyth bit of the FIF of the DCS signal to 1 to inform the receiving station that the PWD signal has been transmitted, and permits transmission of the PWD signal.

In step S137, the control circuit 36 sets the 50th bit of the FIF of the DCS signal to 0 to inform the receiving station that the PWD signal has not been transmitted, and prohibits the transmission of the PWD signal.

In step S138, the control circuit 36 determines whether subaddress communication is selected, that is, whether the lamp 32 is correctly turned on. If yes, go to step S140; if no, go to step S149.

In step S140, the control circuit 36 determines whether the 49th bit of the FIF of the DIS signal is 1, that is, whether the remote receiving station has a subaddress receiving function. If yes, go to step S148. If no, go to step S142.

In step S142, the control circuit 36 performs the remaining preliminary procedures. Here, the control circuit notifies that subaddress communication is impossible. In step S144, the control circuit outputs a signal having a signal level 0 to the signal line 36a in order to turn off the CML. In step S146, the control circuit records in the communication result report that subaddress communication is impossible and returns to step S46.

In step S148, the control circuit 36 sets the 49th bit of the DCS signal to 1 to allow transmission of the SUB signal in order to inform the receiving station that the SUB signal has been transmitted. In step S149, the control circuit sets the 49th bit of the DCS signal to 0 to prohibit transmission of the SUB signal in order to inform the receiving station that the SUB signal has not been transmitted. In step S150, the control circuit transmits the PWD / SUB / NSS / TSI / DCS signal in accordance with steps S136, S137, S148, and S149. Further, in step S152, the control circuit performs the remaining preliminary procedure. In step S154, the control circuit reads out and transmits the image signal. Next, in step S156, the control circuit performs a post procedure. In step S158, the control circuit outputs a signal having signal level 0 to the signal line 36a to turn off the CML, and returns to step S46.

In the first embodiment described above, PWD and SUB signals are transmitted as receive command signals, at which time transmission of signals in the FIF of the DCS signal is known. However, as in the second embodiment of the present invention, PWD and SEP signals may be transmitted as transmit command signals, and the transmission of the signals may be known in the FIF of the DTC signal. Here, the presence or absence of the PWD signal is assigned to the 65th bit of the FIF of the DTC signal, and the presence or absence of the SEP signal is assigned to the 66th bit of the FIF of the DTC signal.

In addition, as in the third embodiment of the present invention, whether the Non-Standard facilities Set-up (NSS) signal is included in the received command signal is a digital command signal (DCS), for example, a FIF of DCS. It can be known to the remote station by the 67th bit of.

For example, this is effective when the DCS signal is used to specify standard or fine mode and when the NSS signal is used to specify super fine mode.

7 is a flowchart showing a control part different from the first embodiment in the case described above.

First, if YES in step S72 described above, the control circuit 36 proceeds to step S162. In step S162, the control circuit determines whether the 67th bit of the FIF of the DCS is 1, that is, the NSS signal is also transmitted. If yes, go to step S164; if no, go to step S78 described above.

In step S164, the control circuit 36 determines whether an NSS signal is received. When the NSS signal is received, the flow goes to the above-described step S78, otherwise, the flow goes to the above-described step S74.

Further, if YES in step S120 described above, control circuit 36 proceeds to step S172. In step S172, the control circuit 36 determines whether an NSF signal is received. If an NSF signal is received, the process proceeds to step S174, and if not, proceeds to step S126 described above.

In step S174, the control circuit 36 determines whether the NSS signal is transmitted. When the NSS signal is transmitted, the process proceeds to step S176. When the NSS signal is not transmitted, the process proceeds to step S126 described above.

In step S176, the control circuit 36 sets the 67th bit of the FIF of the DCS signal to 1 to allow transmission of the NSS signal to designate the transmission of the NSS signal to the remote receiving station.

In addition, as a fourth embodiment of the present invention, whether the TSI signal is included in the received command signal is determined by the digital command signal (DCS), for example, the 68th bit of the FIF of the DCS. It can be known to the remote station. Operations in this case may be substantially the same as the operations of the third embodiment shown in FIG. 7, and description thereof will be omitted.

In addition, the initial identification signal may be applied to the third and fourth embodiments described above, and whether the digital identification signal DIS includes whether a non-standard facilities (NSF) signal or a called party identification (CSI) signal is included. Can be known to the remote station. For example, the presence or absence of an NSF is assigned to the 67th bit of the FIF of DIS and the presence or absence of CSI is assigned to the 68th bit of the FIF of DIS.

In addition, the transmission command signal may be applied to the above-described third and fourth embodiments, and digitally includes whether a non-standard facilities command (NSC) signal or a calling subscriber identification (CSI) signal is included. It can be known to the remote station by a transmit command (DTC) signal. For example, the presence or absence of the NSC is assigned to the 67th bit of the FIF of the DTC, and the presence or absence of the CIG is assigned to the 68th bit of the FIF of the DTC.

As described above, according to the present embodiment, for example, in the case where the DCS signal, the DIS signal, the DTC signal, and the like are each in a multiframe configuration, in the FIF (fax information field) such as the DCS signal, the DIS signal, and the DTC signal, respectively. This fact can be informed to the remote station by including the signals. Thus, when the DCS signal, the DIS signal, the DTC signal, and the like are transmitted in each of the multiframes, and when the receiving station side fails to receive the part of the multiframe of these signals, the receiving station side can correctly recognize the failure. This prevents a difference in recognition between the transmitting station side and the receiving station side, thereby preventing an error-prone operation.

Example 5

9A and 9B are block diagrams showing the fax machine according to the fifth embodiment.

9A and 9B, features which function in the same manner as in FIG. 1 are indicated by common reference numerals, and description thereof is omitted.

The encode circuit 12 receives the read data output to the signal line 10a, encodes the read data (MR encoded with K = 8), and outputs the encoded data through the signal line 12a.

The memory circuit 38 stores encoded data output to the signal line 12a under the control of the signal line 36h, and outputs the stored data to the signal line 38a.

The decode / variable / magnify / encode circuit 40 accepts data encoded MR at K = 8 and output to signal line 38a. The circuit 40 decodes, variable-enlarges, and re-encodes the data as needed, and outputs the processed data to the signal line 40a.

V27ter or V29 modulator 14 accepts encoded data from signal line 40a, modulates encoded data according to known ITU-T recommendation V27ter (phase difference modulation) or V29 (orthogonal modulation), The modulated data is output to the adder circuit 16 via the signal line 14a.

A memory box number designate key 42 is used to specify the memory box number. After the key 42 is pressed, data is retrieved using a ten-key 43 to specify the memory box number. In detail, the key 42 is used to designate a memory box on the transmitting station side to store the image received thereon on the remote receiving station side (the memory box is known to the remote receiving station by the SUB signal). In addition, a key 42 is also used by the polling receiver to designate a memory box for remote polling transmitter data stored at a place to be received by the polling receiver by polling (a memory box is stored at the remote polling transmitter by the SEP signal. Is known). When the designation key 42 is pressed, a press pulse is generated in the signal line 42a.

Tenkey 43 is used to put numerical data on dialing or the like. Data related to the pressed tenkey is output to the signal line 43a.

The memory polling selection key 44 is used by the polling receiving station side to specify polling reception of data stored in the memory to the polling transmitting station side. When the key 44 is pressed, a press pulse is generated on the signal line 44a.

The memory polling designation ramp 46 is used to designate memory polling reception. The lamp 46 is turned off when a clear pulse is generated in the signal line 36i. In turn, the lamps 46 are alternately turned on and off each time a press pulse is generated on the signal line 44a. When the lamp 46 is turned off, a signal having a signal level of 0 is output to the signal line 46a. When the lamp 46 is turned on, a signal having a signal level 1 is output to the signal line 46a.

The password transmission selection key 48 is used to select transmission of a password signal in image data transmission and polling reception. When the key 48 is pressed, a press pulse is generated in the signal line 48a. The password is registered on the side that receives the password signal. If the password signal transmitted from the password signal transmitting station side does not match the registered password, the receiving side rejects communication (reception).

In addition, a password is registered on the polling transmission side. If the password signal transmitted from the polling receiving station side does not match the registered password, the polling transmitting side rejects the communication (sending). Here, if the subaddress is specified by the SUB signal, a memory box for storing the received image data is determined on the side receiving the image data, and a memory box to be used for the polling transmission is determined on the polling transmitting side. If no SUB signal is specified, the memory box with address 0 will be selected. Here, for example, assume that memory boxes having a range from address 0 to address 99 are valid.

The password transmission designation lamp 50 is used to indicate transmission of a password signal at the time of image data transmission and at polling reception. Lamp 50 is turned off when a clear pulse is generated in signal line 36j. Subsequently, lamp 50 turns on and off each time a press pulse is generated in signal line 48a. When lamp 50 is turned off, a signal having signal level 0 is output to signal line 50a. When lamp 50 is turned on, a signal having signal level 1 is output to signal line 50a.

The password register circuit 52 is used to register a station password via the signal line 52a.

The console unit 54 includes a one-touch dialing key, a speed dialing key, a ten key pad, a personal key, a password registration key, a setting key, and other function keys. Data associated with the pressed key is output to signal line 54a.

The control circuit 36 performs an operation similar to that of the first embodiment. Therefore, only the portions that are not described with respect to the first embodiment will be described with respect to the fifth embodiment. The same control features as those of the first embodiment are denoted by the common reference numerals, and description thereof is omitted.

When polling reception is performed, the received DIS signal indicates that the selective polling capability is valid (the function of receiving SEP signal is valid; 47th bit of the FIF of the DIS signal = 1) and also has a designated memory box. If polling reception is selected, an SEP signal with the designated memory box is transmitted, and a DTC signal with 47 th bit = 1 is transmitted to inform the remote station of the transmission of the SEP signal. The received DIS signal indicates that the password performance is valid (50th bit of the FIF of the DIS signal = 1), and if password communication is selected, the password registered in the station is transmitted by the PWD signal, and also 50 of the FIF. The DTC signal with the 1st bit = 1 is transmitted to inform the remote station of the transmission of the PWD signal.

When the polling receiver does not transmit the PWD signal, the 50th bit of the FIF of the DTC signal is set to zero. When the polling receiver does not transmit the SEP signal, the 47th bit of the FIF of the DTC signal is set to zero.

When the presence of the PWD signal is detected from the 50th bit of the FIF of the DTC signal transmitted from the polling receiving station (50th bit = 1), and also when the reception of the PWD signal fails, the SEP signal is also received from the 47th bit of the FIF of the DTC signal. Is detected (47th bit = 1), and when the reception of the SEP signal fails, the polling transmitting station side transmits the initial identification number again.

In the fifth embodiment, the definitions of the 47th, 49th and 50th bits of DIS and DCS are the same as in the first embodiment.

In a fifth embodiment, the 47th bit of the DTC is allocated to indicate whether an SEP signal has been transmitted. This 47th bit is set to 1 when the SEP signal is transmitted and to 0 when it is not transmitted. The 49th bit of the DTC is fixed at zero. Moreover, the 50th bit of the DTC is allocated to indicate whether a PWD signal has been transmitted. This 50th bit is set to 1 when the PWD signal is transmitted and to 0 when it is not transmitted.

Therefore, in polling transmission, the polling transmitting station (incoming) can check whether the SEP and PWD signals are transmitted by checking the 47th and 50th bits of the received DTC.

19A and 19B are flowcharts showing the procedure of this embodiment in polling communication. Fig. 19A shows the procedure of this embodiment when the called station fails to receive the SEP and PWD signals.

As shown, according to the procedure of this embodiment of FIG. 19A, since the 47th and 50th signals of the DTC are all 1, the called station has transmitted the SUB and PWD signals, but the called station fails to receive these signals. I think that. Therefore, the called station transmits the DIS signal again.

Figure 19b also shows the procedure of this embodiment when the calling station has not sent either the SEP signal or the PWD signal.

According to the embodiment of Fig. 19B, since both the 47th and 50th bits of the DCS are 0, the called station determines that the calling station has not sent either the SEP signal or the PWD signal. Therefore, after transmitting the DCS, Tr, and TCF signals, the called station proceeds with image transmission by polling.

As described above, according to this embodiment, it is possible to clearly determine which of the SEP signal and the PWD signal will be transmitted, so that an appropriate operation can be obtained.

10 to 18 are flowcharts showing the operation of the control circuit 36 in the fifth embodiment. Steps identical to those of the first embodiment are denoted by common reference numerals, and description thereof is omitted.

In FIG. 10, in step S160, the control circuit 36 generates a clear pulse in the signal line 36i to turn off the memory polling designation ramp 46. In step S162, the control circuit 36 generates a clear pulse in the signal line 36j to turn off the password transmission designation lamp 50. FIG.

Next, in step S164, the control circuit 36 accepts the data output to the signal line 54a and determines whether registration of the station password is selected. If registration of the password is selected, the flow proceeds to step S166, and if the registration is not selected, the flow proceeds to step S46.

In step S46, the control circuit 36 accepts the data output to the signal lines 34a, 42a, 43a and 54a, and determines whether the output of the data stored in the memory circuit 26 is selected. If the output is selected, the process proceeds to step S48, and if not selected, the process proceeds to step S50.

In step S48, the control circuit 36 outputs the signal having the signal level 1 to the signal line 36d, and outputs the data stored in the memory circuit 26 via the signal line 36e. Here, if the memory box is designated by the SUB signal, the control circuit 26 outputs data stored in the designated memory box. If the password is specified by the PWD signal, the control circuit 36 outputs the data after the password is entered. After completion of writing, the control circuit outputs a signal having a signal level of 0 to the signal line 36d.

In step S168, the control circuit 36 determines whether polling transmission data in the memory is selected. If store is selected, flow proceeds to step S170 to store polling transmission data in the memory circuit 38. Here, it is also possible for the control circuit 36 to accept the data output on the signal lines 42a and 43a and to designate a memory box for storage. If storage in the memory is not selected, the flow advances to step S172.

In step S172, the control circuit 36 determines whether polling reception is selected. If polling reception is selected, the flow proceeds to step S206 (FIG. 17), and if not selected, proceeds to step S44.

In step S174 of FIG. 11, the control circuit 36 determines whether a PWD / SEP / CIG / DTC signal is received. If these signals are received, the process proceeds to step S176 (FIG. 15), and if not, the process proceeds to step S70.

In step S176 of FIG. 15, the control circuit 36 determines whether a DTC signal has been received. In step S106 of FIG. 15, the control circuit 36 determines whether a DTC signal is received.

If a DTC signal is received, the process proceeds to step S178, and if not, the process proceeds to step S74 (FIG. 11).

In step S178, the control circuit 36 determines whether the 47th or 50th bit of the FIF of the DTC signal is 1. If yes, go to step S180; if no, go to step S188.

In step S180, the control circuit 36 determines whether the 47th bit of the FIF of the DTC signal is 1 and the 50th bit of the FIF of the DTC signal is 0. That is, the control circuit 36 checks the combined state of the remote station specifying the transmission of the SEP signal and the remote station not specifying the transmission of the PWD signal within the multiframe. If yes, go to step S182; if no, go to step S196 (FIG. 16).

In step S182, the control circuit 36 determines whether the SEP signal is received. If the SEP signal is received, the flow advances to step S184. If the SEP signal has not been received, the SEP signal means determines to fail, and returns to step S74 (FIG. 11).

In step S184, the control circuit 36 performs the remaining preliminary procedures. In step S186, the control circuit 36 performs polling transmission of data stored in the memory circuit 38 via the signal line 36h. Here, the control circuit performs polling transmission of data stored in the memory box designated by the SEP signal.

In step S188, the control circuit 36 performs the remaining preliminary procedures. In step S190, the control circuit 36 performs polling reception of data stored in the memory circuit 38 via the signal line 36h. Here, the control circuit performs polling transmission of data stored in memory box 0. In step S192, the control circuit performs a post procedure. In step S194, the control circuit outputs a signal having signal level 0 to the signal line 36a to turn off the CML, and returns to step S44 (Fig. 10).

In step S196 (FIG. 16), the control circuit 36 determines whether the 47th bit of the FIF of the DTC signal is 0 and the 50th bit of the FIF of the DTC signal is 1. That is, the control circuit 36 checks the combined state in which the remote station designates the transmission of the PWD signal in the multiframe and the remote station does not designate the transmission of the SEP signal. If yes, go to step S198; if no, go to step S202.

In step S198, the control circuit 36 determines whether a PWD signal is received. When the PWD signal is received, the flow proceeds to step S200. If the PWD signal is not received, it is determined that reception of the PWD signal has failed, and the flow returns to step S74 (Fig. 11).

In step S200, the control circuit 36 determines whether the PWD signal and the password (registered in the circuit 52) set in the station match. If they match, the process proceeds to step S188 (FIG. 15). If they do not match, the process proceeds to step S106 (FIG. 12).

In step S202, the control circuit 36 determines whether a PWD signal is received. When the PWD signal is received, the flow advances to step S204. If the PWD signal is not received, the control circuit 36 determines that the PWD signal means has failed and proceeds to step S74 (FIG. 11).

In step S204, the control circuit 36 determines whether the PWD signal and the password (registered in the circuit 52) set in the station match. If they match, the process proceeds to step S182. If they do not match, the process proceeds to step S106 (Fig. 12).

Step S206 (FIG. 17) represents step S116 and step S118 of FIG. The control circuit 36 turns on the CML and sets the timer T1 to 35 seconds.

Step S208 represents step S120 of FIG. If the NSF / CSI / DIS signal is received, the control circuit 36 proceeds to step S212. If these signals are not received, the flow proceeds to step S210.

Step S210 represents step S122 of FIG. Upon occurrence of a timeout associated with timer T1, control circuit 36 proceeds to step S211 to turn off the CML. If no timeout occurs, the flow proceeds to step S208.

Step S212 represents step S126 of FIG. The control circuit 36 receives the data on the circuit 50. When password communication is selected, the process proceeds to step S214. When password communication is not selected, the process proceeds to step S217.

Step S214 represents step S128 of FIG. When the 50th bit of the FIF of DIS is 1, the control circuit 36 proceeds to step S216. When the 50th bit of the FIF of DIS is 0, the control circuit 36 proceeds to step S130 (Fig. 13).

In step S216, the control circuit 36 sets the fiftyth bit of the FIF of the DTC signal to 1 to inform the remote station that the PWD signal will be transmitted, allowing the transmission of the PWD signal.

In step S217, the control circuit 36 sets the 50th bit of the FIF of the DTC signal to 0 to inform the remote station (or partner station) that the PWD signal will not be transmitted, thereby prohibiting transmission of the PWD signal.

In step S218, the control circuit 36 accepts the data output to the signal lines 46a, 42a and 43a. The control circuit 36 determines whether the memory box for polling transmission is designated. That is, in particular, the control circuit 36 checks the combined state in which the lamp 46 is turned on and the memory box for polling transmission is specified. If YES, go to step S220; otherwise, go to step S229 (Fig. 18).

In step S220, the control circuit 36 determines whether the 47th bit of the FIF of the DIS is 1, that is, whether the remote station has an optional polling transmission function (the function of receiving the SEP signal). If YES, the flow proceeds to step S228 (FIG. 18), and if NO, the flow goes to step S222.

In step S222, the control circuit 36 performs the remaining preliminary procedures. Here it is notified that selective polling communication is not possible. In step S224, the control circuit outputs a signal having signal level 0 to signal line 36a to turn off the CML. In step S226, the control circuit 36 records in the communication result report that selective polling communication is not possible.

In step S228, the control circuit 36 sets the 47th bit of the FIF of the DTC signal to be 1 to inform the remote station that the SEP signal will be transmitted, thereby allowing transmission of the SEP signal.

Only in S229, the control circuit 36 sets the 47th bit of the FIF of the DTC signal to 0 to inform the remote station that the SEP signal will not be transmitted, thereby prohibiting transmission of the SEP signal.

In step S230, the control circuit 36 transmits the PWD / SEP / CIG / DTC signal in accordance with steps S216, S217, S228, and S229. Further, in step S232, the control circuit 36 performs the remaining preliminary procedure. In step S234, the control circuit 36 polls receiving / recording the image signal. Then, in step S236, the remaining post procedure is performed. In step S238, to turn off the CML, a signal having a signal level 0 is output to the signal line 36a, and the flow returns to step S44 (Fig. 10).

The SEP and SUB signals can be used for display of a terminal connected to a LAN or the like.

As described above, according to the fifth embodiment, an option signal that can be limited by the declaration in the DTC signal can be added. In addition, when the DTC group signal is received, control on the side of transmitting the initial identification signal can be limited.

Example 6

In the fifth embodiment, the receiving station side or the polling transmitting station side receives a notification of the existence of the option signal, but receives a frame of the option signal specified in this communication in which the presence / absence of the option signal is known as the receive command signal or the transmit command signal. To a facsimile device that resends the initial identification signal when it fails.

However, after the retransmitted initial identification signal is received, the transmitting station side retransmits the PWD / SUB / NSS / TSI / DCS signal, or the polling receiving station side retransmits the PWD / SEP / NSC / CIG / DTC signal. This requires a longer procedure time.

In this regard, the German standard makes the following decisions; In the case of transmitting the DTC group signal, the polling receiving side receives the DIS group signal without receiving the DCS group signal from the polling transmitting side and transmits the DCN signal to stop the communication. In other words, when the Japanese fax is the polling transmitter and the German fax is the polling receiver, communication is impossible.

In this embodiment, although the delay of the communication procedure and the receiving side or the polling transmitting side have received a notification of the presence of the option signal, the option specified in such communication where the presence / absence of the option signal is known as a receive command signal or a transmit command signal. This avoids the possibility of communication failure when it fails to receive a frame of signal.

20 is a block diagram showing a sixth embodiment of the present invention.

The description of the sixth embodiment is made only for parts different from the fifth embodiment. Embodiments identical to those of the fifth embodiment are denoted by common reference numerals, and description thereof will be omitted.

The memory box number designating circuit 144 is used to designate a memory box number to classify a memory box for outputting the stored data when the output of the stored data is selected by the stored data output key 34. The designated memory box number is output to the signal line 144a.

The memory polling box numbering circuit 146 is used to designate a memory box number for memory polling transmission when performing memory polling reception. The designated memory box number is output to the signal line 146a. The select polling signal is used to inform the memory polling transmitting station side from the memory polling receiving station side.

The operation setting circuit 152 is used to set a password signal for a local station. If a password is set at the time of transmission and at memory polling reception, the password is transmitted. In addition, at the time of reception and in memory polling transmission, if a password signal from a remote station is received, it is compared with a password set in the own station. If they match, receive and memory polled transmissions will be performed. If the passwords do not match, the password signal is not transmitted at the time of transmission and memory polling reception. Here, the password signal is output to the signal line 152a.

When the local station is at the receiving station side or the polling transmitting station side, when the local station declaring the existence of the option signal receives the digital command signal or the digital transmission command signal but fails to receive the declared option signal, the operation selection circuit 150 (A) Retransmission of the initial identification signal, (B) CRP signal transmission, and (C) waiting for a signal from a remote station. The selected data is output to the signal line 150a.

In the same case as the operation selection circuit 150 described above, the operation setting circuit 152 may select [(1) initial identification signal retransmission or (2) CRP signal to be selected according to the coefficient of receiving the digital command signal or the digital transmission command signal. (3) Wait for signal from remote station] operation. The set data is output to the signal line 152a.

In addition to the process of the fifth embodiment, the control circuit 36 in the sixth embodiment has received a DCS signal that the host has declared including the subaddress signal or password signal, but fails to receive the declared subaddress signal or password signal. If so, control is performed according to the selected operation among (A) DIS group signal retransmission, (B) CRP signal transmission, and (C) waiting for a command signal to be retransmitted.

21 to 26 are flowcharts showing the operation of the control circuit 36 in this embodiment.

In step S50 (FIG. 21), the control circuit 36 determines whether the reception or polling transmission is selected. If reception or polling transmission is selected, go to step S60; otherwise, go to step S52.

In step S52 (FIG. 21), the control circuit 36 determines whether transmission is selected. If transmission is selected, proceed to step S116 (FIG. 25), otherwise step S172 is selected.

In step S172 (FIG. 21), the control circuit 36 determines whether selective polling reception is selected. If optional polling reception is selected, go to step S206; otherwise, go to step S54.

In step S82, the control circuit 36 determines whether the SUB signal is received. If the SUB signal is received, proceed to step S84 and subsequent steps for reception in memory. If the SUB signal is not received, it is determined that the SUB signal reception has failed, and the flow proceeds to step S280 (Fig. 24).

In step S94, the control circuit 36 determines whether a PWD signal is received. If the PWD signal is received, the flow advances to step S96. If the PWD signal is not received, it is determined that reception of the PWD signal has failed, and the flow proceeds to step S280 (Fig. 24).

In step S112, the control circuit 36 determines whether a PWD signal is received. When the PWD signal is received, the flow advances to step S114. If the PWD signal is not received, it is determined that reception of the PWD signal has failed, and the flow proceeds to step S280 (Fig. 24).

In step S280 (FIG. 24), the control circuit 36 accepts the data output to the signal line 150a to read the data generated by the operation selection circuit 150. As shown in FIG. If the local station has received a digital command signal declaring the presence of an option signal but fails to receive the specified option signal, the control circuit 36 may (A) retransmit the initial identification signal, (B) transmit the CRP signal, or (C It determines whether the operation of waiting for the reception command signal to be retransmitted is selected. If the initial identification signal retransmission is selected, the flow proceeds to step S74 of FIG. If the signal wait to be transmitted from the remote station is selected, the flow proceeds to step S68 of FIG. If the CRP signal transmission is selected, the CRP signal is transmitted in step S282, and the flow proceeds to step S68 in FIG.

27A, 27B, and 27C illustrate a manner of exchanging procedural signals that include DCS. 27A shows the case of (A) of retransmitting the initial identification signal. 27B shows the case (B) of transmitting a CRP signal. Fig. 27C shows a case (C) of waiting for a reception command signal to be transmitted.

Next, the process by which the control circuit 36 receives the DTC signal will be described.

As in the fifth embodiment described above, the digital transmission command signal (DTC signal) is used to inform the remote station whether the option signal is included in the transmission command signal. In the sixth embodiment, the polling transmitting station side (A) initial identification signal retransmission, (B) when the polling transmitting station modifies the digital transmission command signal declaring the presence of the option signal but fails to receive the declared option signal. ) CRP signal transmission, and (C) waiting for the transmission command signal to be retransmitted can be selected.

28 to 33 describe only the control features of the sixth embodiment that are different from the control features of the fifth embodiment described above. The same control features are denoted by common reference numerals and description thereof is omitted.

In step S182, the control circuit 36 determines whether the SEP signal is received. When the SEP signal is received, proceed to the next step to perform a memory polling transmission of the data stored in the memory box designated by step S184 and the SEP signal. When the SEP signal is not received, it is determined that the SEP signal reception has failed, and the flow proceeds to step S326 (Fig. 30).

In step S198, the control circuit 36 determines whether a PWD signal is received. When the PWD signal is received, the flow proceeds to step S200. If the PWD signal is not received, it is determined that the PWD signal has not been received, and the flow proceeds to step S326 (Fig. 30).

In step S202, the control circuit 36 determines whether a PWD signal is received. When the PWD is received, the flow advances to step S204. When the PWD signal is not received, the process does not receive the PWD signal and proceeds to step S326 (Fig. 30).

In step S326 (FIG. 30), the control circuit 36 accepts the data output to the signal line 150a to read the data generated by the operation selection circuit 150. As shown in FIG. If the local station has received a digital transmit command signal that declares the presence of an option signal but has not received the specified option signal, it may (A) retransmit the initial identification signal, (B) transmit the CRP signal, or (C) the receive command to be retransmitted. Determines which action to select during signal waiting. If retransmission of the initial identification signal is selected, the flow advances to step S74 of FIG. If the wait of the signal to be transmitted from the remote station is selected, the flow proceeds to step S68 of FIG. If transmission of the CRP signal is selected, the CRP signal is transmitted in step S328, and then the flow proceeds to step S68 (FIG. 22).

33A, 33B, and 33C illustrate a manner of exchanging procedural signals that include a DTC. 33A shows (a) in the case of retransmission of the initial identification signal. 33B shows (b) when transmitting a CRP signal. 33C shows the case (c) of waiting for a transmission command signal to be retransmitted.

As described above, the sixth embodiment provides a control feature for selecting from a receiving station side when a digital command signal or a digital transmission command signal that declares the presence of an option signal is received but the declared option signal is not received. . By transmitting the CRP signal or waiting for the DCS or DTC group signal to be retransmitted, the communication time can be shortened and easy operation is realized.

Further, as the seventh embodiment, in the configuration of the sixth embodiment described above, whether the non-standard function setting (NSS) signal is included in the received command signal is determined by the digital command signal DCS, for example, the 67th bit of the FIF. Can be informed to the remote station.

For example, this is effective when the DCS signal is used to specify standard or fine mode and the NSS signal is used to specify ultra fine mode.

34 is a flowchart showing control portions different from those of the sixth embodiment described above.

First, in step S72 (FIG. 22) described above, if YES, control circuit 36 proceeds to step S362 (FIG. 34). In step S362, it is determined whether the 67th bit of the FIF of the DCS signal is 1, that is, whether the NSS signal is also transmitted with the DCS. If yes, go to step S364. If no, go to step S78 (Fig. 22).

In step S364, the control circuit 36 determines whether the NSS signal is received. If it is received, the process goes to step S78 (FIG. 22), and if not, the process proceeds to step S74 (FIG. 22).

Further, if YES in step S120 (FIG. 25) described above, control circuit 36 proceeds to step S372 (FIG. 34). In step S372, it is determined whether an NSF signal is received. If it is received, the process proceeds to step S374, and if not, the process proceeds to step S377.

In step S374, the control circuit 36 determines whether the NSS signal is transmitted. When the NSS signal is transmitted, the process proceeds to step S376, and when the NSS signal is not transmitted, the process proceeds only to S377.

In step S176, the control circuit 36 sets the 67th bit of the FIF of the DCS signal to 1 to designate transmission of the NSS signal to the remote receiving station, thereby enabling transmission of the NSS signal.

In step S377, the control circuit 36 sets the 67th bit of the FIF of the DCS signal to 0 to specify that the NSS signal is not transmitted to the remote receiving station, thereby preventing the NSS signal from being transmitted.

As an eighth embodiment of the present invention, in the sixth embodiment, whether the transmitting subscriber identification (TSI) signal is included in the received command signal is remoted by the digital command signal (DCS), for example, the 68th bit of the FIF. The station may be notified. Since the operation in this case is almost the same as the seventh embodiment shown in FIG. 34, description thereof will be omitted.

Moreover, as a ninth embodiment of the present invention, the initial identification signal can be applied to the seventh and eighth embodiments described above, and whether a non-standard function (NSF) signal or a called party identification (CSI) signal is included. Can be notified to the remote station by the digital identification signal DIS. For example, the presence or absence of an NSF is assigned to the 67th bit of the FIF of DIS and the presence or absence of CSI is assigned to the 68th bit of the FIF of DIS.

Further, as a tenth embodiment of the present invention, the transmission command signal can be applied to the seventh and eighth embodiments described above, and includes whether a non-standard function command (NSC) signal or a calling party identification (CIG) signal is included. Whether or not can be notified to the remote station by a digital transmission command (DTC) signal. For example, the presence or absence of the NSC is assigned to the 67th bit of the FIF of the DTC and the presence or absence of the CIG is assigned to the 68th bit of the FIF of the DTC.

Next, as an eleventh embodiment of the present invention, in the control of the above-described embodiment, when the receiving station side receives a digital command signal declaring the existence of the option signal but does not receive the designated option signal, or the polling transmitting station side When the digital transmission command signal that declares the existence of the option signal is received but the specified option signal is not received, the operation of responding to the reception of the reception command signal or the transmission command signal may vary depending on the number of receptions.

In particular, if an option signal is not received despite the declaration of the presence of the option signal, the local station waits for a receive command signal or a send command signal to be retransmitted until they are received twice. However, in response to their third reception, the local station retransmits the initial identification signal. On three receptions, a series of operations are repeated.

In general, the line is connected even when the local station does not respond until the second reception of the DTC signal transmitted from the remote station. Therefore, even when the local station does not properly receive the option signal, it does not respond until the second reception of the DTC signal. In response to the third reception of the DTC signal, resend the DIS. This shortens the time required for two receptions of the DTC signal. Since the DIS signal is transmitted in response to the third reception of the DTC signal, the line is disconnected, so no communication error occurs.

35 and 36 are flowcharts showing control portions upon reception of DCS signals in the eleventh embodiment different from the sixth embodiment described above. 37 is a flowchart showing a control portion upon reception of a DTC signal in the eleventh embodiment different from the above-described sixth embodiment.

First, it is assumed that an operation corresponding to the number of reception of the DCS group or DTC group signal is set in the operation setting circuit 152 described later. That is, if a signal from a remote station waits for the first and second reception, the DIS is transmitted at the third reception. These three operations are repeated.

In FIG. 35, if YES in step S50 of FIG. 21, the control circuit 36 proceeds to step S380. In step S380, the DCS reception counter indicating the number of reception of the DCS is set to zero. In step S381, the DTC reception counter indicating the number of receptions of the DTC is set to zero. Then, the flow advances to step S60 to the subsequent step of FIG.

Next, in FIG. 36, if NO in step S82 in FIG. 22, step S94 in FIG. 23, or step S112 in FIG. 23, the control circuit 36 proceeds to step S390.

In step S390, the control circuit 360 increments the DCS reception counter by one due to the reception of the DCS. Next, in steps S392, S394, S396, and S398, an operation is set in accordance with the data set in the operation setting circuit 152. FIG. Here, the data is set so that a signal from the remote station is waited when the content of the DCS reception counter is 1 or 2, and the DIS signal is retransmitted when the content of the DCS reception counter is 3. Therefore, at the counter value of 1 or 2, the flow proceeds to step S68 of FIG. At the counter value of 3, the process proceeds to step S396 to clear the DCS reception counter and then to step S64 in FIG.

Further, in FIG. 37, if NO in step S182 in FIG. 28, step S198 in FIG. 29 or step S202 in FIG. 29, the control circuit 36 proceeds to step S406.

Next, in step S406, the control circuit 306 increments the DTC reception counter by one due to the reception of the DTC. Then, the operation is set in accordance with the data set in the operation setting circuit 152. Here, the data is set so that a signal from the remote station is waited when the content of the DTC reception counter is 1 or 2 and the DIS signal is retransmitted when the content of the DTC reception counter is 3. Therefore, at the counter value of 1 or 2, the flow proceeds to step S68 of FIG. At the counter value of 3, the DTC reception counter is cleared (step S412), and then the flow proceeds to step S64 of FIG.

If there is no response until the third reception, the transmitting station may encounter an error after the third transmission is attempted. However, according to the eleventh embodiment, when the receiving station side receives the digital command signal or the digital transmission command signal declaring the existence of the option signal but does not receive the designated option signal, the receiving station side does not respond to the first two receptions. This shortens the communication time and prevents the above-mentioned error by responding to the third reception.

Example 12

The first embodiment has proposed notifying the remote station by a digital command signal (DCS signal) whether or not the option signal is included in the received command signal, for example.

In this regard, no problem will arise at all if the facsimile device has the proposed function. However, in communication, some facsimile devices may have the functions proposed above and some may not.

This causes the following problem. The facsimile device having the function of the first embodiment functions (hereinafter referred to as the function of notifying the presence or absence of the option signal; the facsimile device having the function is called a new facsimile device, and the facsimile device without the function is an old facsimile device). When data is received from a facsimile device that does not have a ", " 0 is output in the presence or absence of transmission of the sub-address signal included in the DCS signal (bit 49), and the presence or absence of transmission of the password signal (bit 50) or In absence, 0 is output. As a result, the new facsimile apparatus determines that no signals are transmitted so that even if the remote station (old facsimile apparatus) transmits the PWD signal or the SUB signal, it does not receive them.

It is an object of this embodiment to provide a facsimile device having the above-mentioned function of notifying the presence or absence of an option signal and a facsimile device capable of effectively managing reception from a facsimile device having no above-mentioned function.

The description of the twelfth embodiment deals only with differences from the first embodiment. Like parts are designated by like reference numerals and description thereof is omitted.

In Fig. 38, the tenkey 43 is used to specify, for example, a memory box for storing on the receiving station side from the transmitting station side, or a memory box number containing the received data for outputting data. . Data associated with the pressed key on the ten key pad is output to the signal line 43a.

The setting key 45 is used to indicate the end of data input from the ten key 43, for example. When the key 45 is pressed, a pulse is generated on the signal line 45a.

The password setting circuit 52 is used to set a password. The password setting circuit 52 accepts the data output to the signal line 52a to recognize the set password. At the time of transmission, a password is transmitted as a PWD signal if it is set. When a PWD signal is received, communication continues only if the received PWD signal matches the set password.

When the apparatus of this embodiment acts as a transmitting side, the control circuit 36 can notify the remote station whether or not the option signal is included in the received command signal by the declaration of the digital command signal (DCS signal). To control the device. In this regard, the conventional facsimile apparatus which is estimated by the present embodiment as the transmitting side cannot notify the remote station whether or not the option signal is included in the received command signal by the declaration of the digital command signal (DCS signal). It includes. The following description deals with the transmission of both.

Next, a description will be given of the apparatus of the present embodiment serving as the receiving side. When receiving from either of the two facsimile apparatuses described above, from a facsimile apparatus capable of informing the remote station whether or not the option signal is included in the received command signal by the declaration of the digital command signal (DCS signal). Upon reception of (A) when the receiving side fails to receive the option signal despite the existence of the option signal declared by the digital command signal (DCS signal), the receiving side retransmits the initial identification signal; In contrast, (B) when the receiving side receives the option signal despite the inclusion of the option signal in the receiving command signal not declared by the digital command signal (DCS signal), the receiving side treats the received option signal as an invalid signal. .

In this regard, the inclusion of the option signal in the receive command signal is not declared by the digital command signal (DCS signal) in the following two cases: (1) The option signal is received by the declaration of the digital command signal (DCS signal). When received from a facsimile apparatus capable of notifying a remote station whether or not it is included in the command signal, transmission of the option signal is not specified here; (2) In the case of receiving from a facsimile apparatus that cannot notify the remote station whether or not the option signal is included in the received command signal by the declaration of the digital command signal (DCS signal). Considered option signals are password signals (PWD signals) and subaddress signals (SUB signals).

Next, FIGS. 39 to 45 are flowcharts showing the operation of the control circuit 36 in this embodiment. The steps of this embodiment that are identical to the steps of the first embodiment are given the same reference numerals and the description thereof is omitted.

According to the ITU-T promotion recommendations, the 47th, 49th and 50th bits of the FIF of the DCS signal are all set to zero. In the present application, a facsimile apparatus using this transmission method is called an old facsimile apparatus. In contrast, according to the present application, when the 49th bit of the FIF of the DCS signal is 1, it indicates that the SUB signal is also transmitted in a multiframe; If the 49th bit is 0, it indicates that the SUB signal is not transmitted in the multiframe. Further, when the 50th bit of the FIF of the DCS signal is 1, it indicates that the PWD signal is also transmitted in multiframe; If the 50th bit is 0, it indicates that the PWD signal is not transmitted in multiframe. A facsimile device that follows these rules for transmitting is called a new facsimile device (first embodiment of the present application).

In step S96, the control circuit 36 determines whether or not the PWD and password set in the receiving station, that is, in the password setting circuit 52 match. If they match, the process proceeds to step S98. If they do not match, the process proceeds to step S106.

In step S114, the control circuit 36 determines whether or not the PWD and password set in the receiving station, that is, in the password setting circuit 52 match. If they match, the process proceeds to step S82, and if they do not match, the process proceeds to step S106.

In step S126, the control circuit 36 determines whether a password is set in the password setting circuit 52, that is, whether password communication is selected. If it is selected, the process goes to step S128, and if not selected, the process goes to step S137.

In step S128, the control circuit 36 determines whether the 50th bit of the FIF of the DIS signal is 1, that is, whether the password receiving function is available. If YES, the flow proceeds to step S129. If NO, the flow goes to step S130.

In step S129, the control circuit 36 determines whether the transmitting station is a new facsimile apparatus. If the transmitting station is an old facsimile apparatus, the flow proceeds to step S131. If the transmitting station is an old facsimile apparatus, the flow proceeds to step S136. In step S131, the 50th bit of the FIF of the DCS signal is set to 0 (constant), so that the password set in the password setting circuit 52 can be transmitted as the PWD signal. The flow advances from step S131 to step S138.

In step S136, the control circuit 36 sets the 50th bit of the FIF of the DCS signal to 1 to notify the receiving station of the transmission of the PWD signal, and transmits the password set to the password setting circuit 52 as the PWD signal. To be able.

In step S140, the control circuit 36 determines whether the 49th bit of the FIF of the DIS signal is 1, that is, whether the remote receiving station has a subaddress receiving function. If yes, go to step S147. If no, go to step S142.

In step S147, the control circuit 36 determines whether the transmitting station is a new facsimile apparatus. If the transmitting station is an old facsimile apparatus, the flow proceeds to step S151. If the transmitting station is an old facsimile apparatus, the flow proceeds to step S148. In step S151, the 50th bit of the FIF of the DCS signal is set to 0 (constant) so that the memory box number input as the SUB signal can be transmitted (step S149).

In addition, in step S148, the control circuit 36 sets the 49th bit of the DCS signal to 1 to notify the receiving station of the transmission of the SUB signal to enable transmission of the memory box number input as the SUB signal. Then, in step S150, the PWD / SUB / NSS / TSI / DCS signal is transmitted in accordance with steps S137, S131, S136, S149, S148, and S151.

The control circuit 36 proceeds to step S560 (FIG. 45) when receiving from an old facsimile device, where the 49th and 50th bits of the FIF of the DCS signal are both zero, or a PWD that is not transmitted or When receiving from the new facsimile apparatus having the SUB signal, the flow proceeds to step S560.

On reception from a new facsimile device, this processing routine is applied when neither a PWD signal nor a SUB signal is transmitted. The processing routine is effective when reception from the old facsimile device is also involved, i.e. when the old facsimile device is commercially available.

In step S560, the control circuit 36 determines whether a PWD signal has been received. When the PWD signal is received, the flow advances to step S562 to determine whether or not the received PWD signal matches the password set in the receiving station, that is, the password setting circuit 52. If they match, the process proceeds to step S564. If there is no match, the flow proceeds to step S106 (FIG. 41). If the PWD signal is not received, the flow proceeds to step S564 to determine whether the SUB signal is received. If so, the process proceeds to step S84 (FIG. 40). If it is not received, the flow proceeds to step S98 (FIG. 41).

According to the twelfth embodiment described above, the PWD signal and the SUB signal are set as reception command signals, at which time their transmission is declared in the FIF of the DCS signal for notification. However, as a thirteenth embodiment, the PWD signal and the SEP signal can be transmitted as transmission command signals, at which time their transmission can be declared in the FIF of the DTC signal for notification. Here, the presence or absence of the PWD signal is assigned to the 50th bit of the FIF of the DTC signal, and the presence or absence of the SEP signal is assigned to the 47th bit of the FIF of the DTC signal.

The polling transmitter does not receive the PWD signal even though the 50th bit of the FIF of the DTC signal is 1, or the polling transmitter does not receive the SEP signal even though the 47th bit of the FIF of the DTC signal is 1. The polling sender retransmits the initial identification signal. Furthermore, if a PWD signal or an SEP signal is received despite the 47th and 50th bits of the FIF of the DTC signal being zero, these received signals are considered invalid when executing control.

46A to 46C show a manner of exchanging procedure signals of the twelfth embodiment. The apparatus of the twelfth embodiment is on the called side.

In the twelfth embodiment, only operations shown in FIG. 46C are different from those in the first embodiment.

As described above, the twelfth embodiment executes precise processing upon reception from a facsimile device of a facsimile device that declares the presence or absence of an option signal by a digital command signal (DCS signal) and a facsimile device that does not. effective.

Claims (65)

A communication device having a first procedure function for communicating a standard procedure signal and a second procedure function for communicating an optional procedure signal, wherein a destination has said second procedure function. Receiving means for receiving a first standard procedure signal from the destination, the second standard procedure signal comprising information indicating to communicate the optional procedure signal, in response to the first standard procedure signal, and the first standard procedure signal; And transmission means for transmitting a first optional procedure signal for the two procedure functions to the destination. 2. The communications device of claim 1, wherein the standard procedure signal and the optional procedure signal are facsimile procedure signals defined in ITU-T Recommendations. 3. The method of claim 2, wherein the first standard procedure signal is a digital identification signal defined in ITU-T Recommendation T.30, and the second standard procedure signal is an ITU-T Recommendation T.30. And a digital command signal as defined in FIG. 3. The communications device of claim 2, wherein the first optional procedure signal is a sub-address signal as defined in an ITU-T recommendation. 3. The communications device of claim 2, wherein said first optional procedure signal is a password signal as defined in an ITU-T recommendation. 3. The communications device of claim 2, wherein said first optional procedure signal is a non-standard facilities set-up signal as defined in an ITU-T recommendation. 3. The communications apparatus of claim 2, wherein the first optional procedure signal is a transmitting subscriber signal as defined in an ITU-T recommendation. 3. The method of claim 2, wherein the first standard procedure signal is a digital identification signal as defined in ITU-T Recommendation T.30, and the second standard procedure signal is a digital definition as defined in ITU-T Recommendation T.30. And a digital transmit command signal. 9. The communications device of claim 8, wherein said first optional procedure signal is a selective polling signal as defined in an ITU-T recommendation. 9. The communications device of claim 8, wherein said first optional procedure signal is a password signal as defined in an ITU-T recommendation. 9. The communications device of claim 8, wherein said first optional procedure signal is a non-standard functional command signal defined in an ITU-T recommendation. 9. The communications device of claim 8, wherein the first optional procedure signal is a calling subscriber identification as defined in the ITU-T Recommendation. The communication apparatus according to claim 1, wherein said transmitting means transmits said first optional procedure signal and said second standard procedure signal as a series of signals. A communication device having a first procedural function for communicating a standard procedure signal and a second procedural function for communicating an optional procedure signal, comprising: transmitting a first standard procedure signal to a destination indicating that the device has the second procedural function Transmitting means for receiving, as a response signal corresponding to the first standard procedure signal from the destination, receiving means for receiving a second standard procedure signal, or a first optional procedure signal and the second standard procedure signal, and Determine whether information indicating communicating an optional procedure signal has been set in the received second standard procedure signal, and if the first optional procedure signal has not been received from the destination, information of the second standard procedure signal; Determining means for determining a reception error of said first optional procedure signal in accordance with a determination relating to Communication device. 15. The method of claim 14, wherein when the first option procedure signal is not received and the information is set in the received second standard procedure signal, the determining means determines to receive a reception error of the first option procedure signal. Characterized in that the communication device. 15. The method of claim 14, wherein if the first option procedure signal is not received and the information is not set in the received second standard procedure signal, the determining means indicates that the destination does not have the second procedure function. Determining the communication device. 15. The communications device of claim 14, wherein the standard procedure signal and the optional procedure signal are facsimile procedure signals defined in an ITU-T recommendation. 18. The method of claim 17, wherein the first standard procedure signal is a digital identification signal defined in ITU-T Recommendation T.30, and the second standard procedure signal is a digital definition defined in ITU-T Recommendation T.30. And a command signal. 18. The communications device of claim 17, wherein the first optional procedure signal is a sub-address signal defined in an ITU-T recommendation. 18. The communications device of claim 17, wherein the first optional procedure signal is an optional polling signal defined in an ITU-T recommendation. 18. The communications device of claim 17, wherein the first optional procedure signal is a password signal as defined in an ITU-T recommendation. 16. The apparatus of claim 15, further comprising means for causing the receiving means to receive the first option procedure signal resent from the destination when the determining means determines a reception error of the first option procedure signal. Communication device. 18. The method of claim 17, wherein the first standard procedure signal is a digital identification signal defined in ITU-T Recommendation T.30, and the second standard procedure signal is a digital definition defined in ITU-T Recommendation T.30. And a transmission command signal. 15. The method according to claim 14, wherein according to the determination result of the determining means, (A) causing the transmitting means to retransmit the first standard procedure signal, (B) causing the transmitting means to receive the first optional procedure signal. Preferably sending a third standard procedure signal indicating a failure to receive, (C) causing the receiving means to receive the first optional procedure signal retransmitted from the destination, without transmitting the procedure signal to the destination; And selecting means for selecting any one of the selected ones. The communication apparatus according to claim 24, wherein said selection means selects from said (A), (B) and (C) according to an error count determined by said determining means. The method according to claim 25, wherein the selecting means selects (B) or (C) for up to a second error determined by the determining means, and selects (A) for a third error. Communication device. A communication method of a communication device having a first procedural function for communicating a standard procedure signal and a second procedural function for communicating an optional procedure signal, the method comprising: receiving a first standard procedure signal indicating that the destination has the second procedural function; Receiving from the destination, and in response to the first standard procedure signal, a second standard procedure signal including information indicating to communicate the optional procedure signal and a first optional procedure signal for the second procedure function; Transmitting to the destination. 28. The method of claim 27, wherein said standard procedure signal and said optional procedure signal are facsimile procedure signals defined in an ITU-T recommendation. 29. The method of claim 28, wherein the first standard procedure signal is a digital identification signal defined in ITU-T Recommendation T.30, and the second standard procedure signal is a digital definition defined in ITU-T Recommendation T.30. A communication method, characterized in that the command signal. 29. The method of claim 28, wherein said first optional procedure signal is a sub-address signal defined in an ITU-T recommendation. 29. The method of claim 28, wherein said first optional procedure signal is a password signal as defined in an ITU-T recommendation. 29. The method of claim 28, wherein said first optional procedure signal is a non-standard function setting signal defined in an ITU-T recommendation. 29. The method of claim 28, wherein said first optional procedure signal is a transmitting subscriber identity signal as defined in an ITU-T recommendation. 29. The method of claim 28, wherein the first standard procedure signal is a digital identification signal defined in ITU-T Recommendation T.30, and the second standard procedure signal is a digital definition defined in ITU-T Recommendation T.30. A communication method characterized by the transmission command signal. 35. The method of claim 34 wherein the first optional procedure signal is an optional polling signal defined in an ITU-T recommendation. 35. The method of claim 34 wherein the first optional procedure signal is a password signal as defined in an ITU-T recommendation. 35. The method of claim 34, wherein said first optional procedure signal is a non-standard functional command signal defined in an ITU-T recommendation. 35. The method of claim 34 wherein the first optional procedure signal is a calling party identification signal as defined in an ITU-T recommendation. 28. The method of claim 27, wherein said transmitting means transmits said first optional procedure signal and said second standard procedure signal as a series of signals. A communication method of a communication device having a first procedural function for communicating a standard procedure signal and a second procedural function for communicating an optional procedure signal, the method comprising: receiving a first standard procedure signal indicating that the device has the second procedural function; Transmitting to a destination, receiving a second standard procedure signal, or a first optional procedure signal and the second standard procedure signal, as a response signal corresponding to the first standard procedure signal from the destination, the optional procedure Determining whether information indicative of communicating a signal is set in the received second standard procedure signal, and if the first optional procedure signal is not received from the destination, information of the second standard procedure signal And determining a reception error of the first optional procedure signal in accordance with a determination relating to. 41. The method of claim 40, wherein if the first option procedure signal is not received and the information is set in the received second standard procedure signal, the determining step determines a reception error of the first option procedure signal. Communication method. 41. The method of claim 40, wherein if the first option procedure signal is not received and the information is not set in the received second standard procedure signal, the determining step indicates that the destination does not have the second procedure function. Determining the communication method. 41. The method of claim 40, wherein the standard procedure signal and the optional procedure signal are facsimile procedure signals defined in an ITU-T recommendation. 44. The method of claim 43, wherein the first standard procedure signal is a digital identification signal defined in ITU-T Recommendation T.30, and the second standard procedure signal is a digital definition defined in ITU-T Recommendation T.30. A communication method, characterized in that the command signal. 44. The method of claim 43, wherein said first optional procedure signal is a sub-address signal defined in an ITU-T recommendation. 44. The method of claim 43 wherein the first optional procedure signal is an optional polling signal defined in an ITU-T recommendation. 44. The method of claim 43, wherein said first optional procedure signal is a password signal defined in an ITU-T recommendation. 42. The method of claim 41, further comprising receiving the first option procedure signal retransmitted from the destination when the determining step determines a reception error of the first option procedure signal. 44. The method of claim 43, wherein the first standard procedure signal is a digital identification signal defined in ITU-T Recommendation T.30, and the second standard procedure signal is a digital definition defined in ITU-T Recommendation T.30. A communication method characterized by the transmission command signal. The method according to claim 40, wherein according to the determination result of the determination step, (A) retransmitting the first standard procedure signal, (B) transmitting a third standard procedure signal indicating that the first option procedure signal is not preferably received, (C) selecting any one of receiving the first optional procedure signal retransmitted from the destination, without transmitting the procedure signal to the destination. 51. The communication method according to claim 50, wherein said selecting step selects from said (A), (B) and (C) according to the error count determined by said determining step. 52. The method of claim 51, wherein the selecting step selects (B) or (C) for the second error determined by the determining step and selects (A) for the third error. Communication method. A communication method between first and second communication devices having a first procedure function for communicating a standard procedure signal and a second procedure function for communicating an optional procedure signal, wherein the first communication device has the second procedure function. Transmitting a first standard procedure signal from the first communication device to the second communication device, the second standard including information indicating to communicate the optional procedure signal in response to the first standard procedure signal; Transmitting a procedure signal and a first optional procedure signal for the second procedure function from the second communication device to the first communication device, as a response signal corresponding to the first standard procedure signal at the first communication device; Receiving at least the second standard procedure signal, information indicating that communicating the optional procedure signal is set in the received second standard procedure signal Determining whether the first optional procedure signal is received from the destination, and determining a reception error of the optional procedure signal in the first communication device according to the determination of the information of the second standard procedure signal. A communication method comprising the steps of: 54. The method of claim 53 wherein the standard procedure signal and the optional procedure signal are facsimile procedure signals defined in an ITU-T recommendation. 55. The method of claim 54, wherein the first standard procedure signal is a digital identification signal defined in ITU-T Recommendation T.30, and the second standard procedure signal is a digital definition defined in ITU-T Recommendation T.30. A communication method, characterized in that the command signal. 55. The method of claim 54, wherein said first optional procedure signal is a sub-address signal defined in an ITU-T recommendation. 55. The method of claim 54, wherein said first optional procedure signal is a password signal as defined in an ITU-T recommendation. 55. The method of claim 54, wherein said first optional procedure signal is a non-standard function setting signal defined in an ITU-T recommendation. 55. The method of claim 54, wherein said first optional procedure signal is a transmitting subscriber identity signal as defined in an ITU-T recommendation. 55. The method of claim 54, wherein the first standard procedure signal is a digital identification signal defined in ITU-T Recommendation T.30, and the second standard procedure signal is a digital definition defined in ITU-T Recommendation T.30. A communication method characterized by the transmission command signal. 56. The method of claim 55, wherein the first standard procedure signal is a digital identification signal defined in ITU-T Recommendation T.30 and the second standard procedure signal is a digital transmission defined in ITU-T Recommendation T.30. A communication method, characterized in that the signal. 62. The method of claim 61, wherein the first optional procedure signal is an optional polling signal defined in an ITU-T recommendation. 62. The method of claim 61, wherein said first optional procedure signal is a password signal as defined in an ITU-T recommendation. 62. The method of claim 61, wherein the first optional procedure signal is a non-standard function setting signal defined in an ITU-recommendation. 62. The method of claim 61, wherein said first optional procedure signal is a calling party identification signal as defined in an ITU-T recommendation.