JPH10336416A - Facsimile equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the communication time in the V.8, V.34 communication by varying a transmission timing for a control signal in execution of communication based on the ITU-T recommendation V.21, V.27ter, V.29, V.17 protocols and in execution of communication based on the V.8, V.34 protocols. SOLUTION: In the case of executing the communication by the V.21, V.27ter, V.29, V.17 protocols, when no reply comes from a receiver after the transmission of a PPS-Q signal by a transmitter, the PPS-Q signal is sent again after the lapse of 3 sec. In the case that a receiver receives the PPS-Q signal, an MCF signal is sent only once with respect to the PPS-Q signal. Furthermore, in the case of executing the communication by the V.8, V.34 protocols and transmission of the PPS-Q signal by the transmitter, the transmission of the PPS-Q signal is continued till the transmitter receives the MCF signal from the receiver. In the case of receiving the PPS-Q signal by the receiver and then transmitting the MCF signal, the transmission is continued till the receiver detects 40 consecutive 1st signals from the transmitter. Even on the occurrence of a protocol error, the communication is continued by using the succeeding protocol immediately.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an ITU-T
Recommendation V. 34 communication and V.34. 27ter, V.I. 29, V.I. 1
7 relates to a facsimile apparatus capable of communication.

[0002]

2. Description of the Related Art Conventionally, in this type of facsimile apparatus, V.V. 21, V.I. 27ter, V.I. 29, V.I. 1
7 communication, and 8, V.I. The transmission timings of the signals in the 34 protocols were the same.

For example, after the transmitter has finished transmitting an image signal, P
Transmit the PS-Q signal. Here, the response is received,
When a response signal (specifically, an MCF signal or a PPR signal) from the receiver cannot be received, the PPS signal is transmitted again after a lapse of 3 seconds. In addition, ITU-T Recommendation V. 21, V.I. 27ter, V.I. 29, V.I. At the time of executing the communication, the PPS-Q signal and the PPS-Q signal are retransmitted, and are in a silent state. 8, V.I. 34 communication, P
While retransmitting the PS-Q signal and the PPS-Q signal, the flag signal was transmitted.

[0004]

However, in the above conventional example, the V.V. 21, V.I. 27ter, V.I. 29,
V. In No. 17, since the maximum speed of the image signal is also 14.4 kb / s, the retransmission interval of the procedural signal after transmitting the image signal is not a big problem even if it is 3 seconds. However, V. 8, V.I. 3
In 4, the maximum speed of the image signal is also 33.6 kb / s,
A4 standard charts are being transmitted in the order of two seconds. Therefore, it is extremely wasteful to wait three seconds without receiving a single protocol signal.

[0005] In addition, conventional ITU-T Recommendation T. 30 G
As a facsimile machine that executes three protocols,
V. 21, V.I. 27ter, V.I. 29, V.I. There was a facsimile machine that performs 17 communications. Here, a control for preventing a trouble due to the echo was provided. However, in the ITU-T recommendations, 8, V.I. T.34 for executing communication. 30 G3 protocols are defined and this V.30 8, V.I. T.34 communication. The G.30 protocol is V.30. 21, V.I. 27ter, V.I. 29, V.I. 17
T. in communication It is basically the same as the 30 G3 protocol.

However, the conventional V.I. 21, V.I. 27te
r, V.R. 29, V.I. In the 17th communication, in consideration of the selection of international communication, a control is provided to eliminate the problem when an echo occurs. 8, V.I. In the 34 communication, it takes time to determine if the same control is added,
Further, there is a disadvantage that the communication time becomes longer.

Accordingly, the present invention provides an ITU-T Recommendation V. 2
1, V.I. 27ter, V.I. 29, V.I. 17 control as it is. 8, V.I. In the case where the communication time is increased when applied to the V.34 communication, this is resolved and V.34 is used. 8, V.I. 3
(4) An object of the present invention is to provide a facsimile apparatus capable of shortening time in communication.

[0008]

Means for Solving the Problems The first invention of the present application is:
ITU-T Recommendation V. 21, V.I. 27ter, V.I. 29,
V. 17, V.I. 8, V.I. 34 in a facsimile apparatus having communication means. 21, V.I. 27ter,
V. 29, V.I. 17 communication execution, and 8, V.I. 3
A facsimile apparatus wherein the transmission timing of a control signal is changed between the time of execution of four communications.

[0009] The second invention of the present application is directed to a case where the transmitter transmits an image information of one page and then receives an RNR signal from the receiver. 21, V.I. 27ter, V.I. 29, V.I. 1
When the communication is performed, the RR signal is retransmitted. 8,
V. At the time of performing the 34 communication, the transmission of the RR signal is continued until the MCF signal from the receiver is received.

[0010] The third invention of the present application relates to the above-mentioned V.A. 21,
V. 27ter, V.I. 29, V.I. At the time of 17 communication execution,
When the transmitter receives a response after transmitting the PPS-Q signal, if there is no response from the receiver, P
When the PS-Q signal is retransmitted and the receiver receives the PPS-Q signal, the MC is performed only once for the PPS-Q signal.
F. and transmits the V.F signal. 8, V.I. 34, when the transmitter transmits the PPS-Q signal, the transmission of the PPS-Q signal continues until the MCF signal from the receiver is received, and the receiver receives the PPS-Q signal and When transmitting a signal, transmission of the MCF signal is continued until a predetermined number of continuous signals are detected from the transmitter.

A fourth invention of the present application is characterized in that the predetermined number of continuous signals is one signal of 40 continuous signals.

The fifth invention of the present application is based on ITU-T Recommendation V. 21, V.I. 27ter, V.I. 29, V.I. 17, V.I.
8, V.I. 34 communication means, and according to ITU-T Recommendation T.34. 30
A facsimile machine that executes the G3 protocol of 21, V.I. 27ter, V.I. 29, V.I. 1
7 when executing communication, 8, V.I. The method is characterized in that the control on the echo during the execution of the protocol is changed between the execution of the 34 communication.

The sixth invention of the present application is directed to the above-mentioned V.11. 21,
V. 27ter, V.I. 29, V.I. At the time of 17 communication execution,
In the response reception at the time of transmitting the protocol signal, when a protocol signal transmitted by the own device is received, it is determined to be an echo and this signal is ignored. 8, V.I. When the communication is performed, the echo is not determined in the response reception at the time of transmitting the protocol signal.

[0014] The seventh invention of the present application is directed to a case where the international communication is selected. 21, V.I. 27ter, V.I. 29,
V. 17 During communication execution, after receiving the initial identification signal twice,
The processing shifts to the transmission of the signal of the DCS group, the echo suppressor is enabled, and 8, V.I. 34, when the initial identification signal is received once, the DCS
It is characterized by shifting to transmission of group signals.

The eighth invention of the present application is based on ITU-T Recommendation V. 21, V.I. 27ter, V.I. 29, V.I. 17, V.I.
8, V.I. 34. A method of controlling a facsimile apparatus having communication means, comprising: 21, V.I. 27ter, V.I. 2
9, V.I. 17 communication execution, and 8, V.I. The transmission timing of the control signal is changed between the time of execution of the 34th communication.

The ninth invention of the present application is based on ITU-T Recommendation V. 21, V.I. 27ter, V.I. 29, V.I. 17, V.I.
8, V.I. 34 communication means, and according to ITU-T Recommendation T.34. 30
A method of controlling a facsimile apparatus that executes the G3 protocol of 21, V.I. 27ter, V.I. 2
9, V.I. 17 communication execution, and 8, V.I. The method is characterized in that the control on the echo during the execution of the protocol is changed between the execution of the 34 communication.

In the first and eighth aspects, the ITU-
T Recommendation V. 8, V.I. In the case of 34 communications, if there is no problem even on an international line with a delay and on a line without a domestic line, even if an error occurs in the protocol, the receiver becomes busy and weight is applied. But soon,
Since it is possible to move to the next protocol and there is no wasted time loss on the protocol, it is possible to execute facsimile communication taking full advantage of the fast primary channel transmission.

In the above-described second invention, the V.V. 8,
V. At the time of performing the communication 34, after receiving the information of the primary channel, for example, when the decoding process of the primary channel information is not immediately performed, the RNR signal is transmitted, and immediately after that, the decoding process of the primary channel information ends.
The MCF signal can be transmitted immediately without waiting for several hundreds of milliseconds due to the preamble signal as in the related art, and it is possible to shift to the reception of the primary channel information, thereby shortening the communication time.

In the third and fourth aspects of the present invention,
V. 8, V.I. Taking advantage of the fact that the protocol signal is band-divided at the time of communication execution, the control signal can be retransmitted until a significant signal from the partner device is detected. Less extension (from 3 seconds to hundreds of ms) and increased protocol certainty in communication. In addition, even if there is a delay like an international line, the protocol can be executed without fail, and the reliability of communication has increased.

In the fifth to seventh and ninth inventions described above, the V.V. 21, V.I. 27ter, V.I. 29, V.I. In the 17th communication, it is possible to appropriately cope with international communication, the reliability of communication is increased, and 8, V.I. In the 34 communication, a malfunction due to error processing and an increase in communication time in the previous procedure are eliminated.

[0021]

FIG. 1 is a block diagram showing the configuration of a facsimile apparatus according to one embodiment of the present invention.

An NCU (network control unit) 2 connects to a terminal of the line in order to use the telephone network for data communication and the like.
It controls connection of a telephone exchange network, switches to a data communication path, and holds a loop. The NCU 2 connects the telephone line 2a to the telephone 4 when the signal level (signal line 20a) from the control circuit 20 is “0”, and connects the telephone line 2a when the signal level is “1”. It is connected to the facsimile machine side.
In a normal state, the telephone line 2a is connected to the telephone 4 side.

The hybrid circuit 6 separates the transmission system signal and the reception system signal, sends the transmission signal from the addition circuit 12 to the telephone line 2a via the NCU 2, and transmits the signal from the other party via the NCU 2. The signal is received and sent to the modem 8 via the signal line 6a.

The modem 8 is based on ITU-T Recommendation V. 8,
V. 21, V.I. 27ter, V.I. 29, V.I. 17, V.I.
34, and performs modulation and demodulation based on
Each transmission mode is designated by the signal line 20c. The modulator / demodulator 8 receives a signal output on a signal line 20b, outputs modulated data on a signal line 8a, receives a received signal output on a signal line 6a, and outputs demodulated data on a signal line 8b. Output.

The ANSam sending circuit 10 is a circuit for sending an ANSam signal. When a signal of signal level "1" is output to the signal line 20d, the ANSam sending circuit 10 sends an ANSam signal to the signal line 10a and sends it to the signal line 20d. When the signal of the signal level “0” is being output, no signal is output to the signal line 10a.

The addition circuit 12 inputs the information of the signal line 8a and the information of the signal line 10a, and adds the result of the addition to the signal line 12a.
a. The reading circuit 14 reads an image of a document and outputs the read image data to a signal line 14a. The recording circuit 16 is for sequentially recording information output to the signal line 20e line by line.

The memory circuit 18 is used for storing raw information of read data or encoded information, and also for storing received information or decoded information.

In the first embodiment of the present invention, the control circuit 20 has the ITU-T Recommendation V. 21, V.I. 27ter, V.I. 2
9, V.I. 17, V.I. 8, V.I. In a facsimile apparatus having communication means, 21, V.I. 27ter,
V. 29, V.I. 17 communication execution, and 8, V.I. At the time of the communication, control is performed to change the transmission timing of the control signal. Specifically, V. 21, V.I. 27
ter. 29, V.I. 17 When the communication is executed, the transmitter
In the response reception after the transmission of the PS-Q signal, if there is no response from the receiver, the PPS-Q signal is retransmitted after 3 seconds, and if the receiver receives the PPS-Q signal, the PPS-Q signal is transmitted. On the other hand, the MCF signal is transmitted only once. V. 8, V.I. 34, when the transmitter transmits the PPS-Q signal, the transmission of the PPS-Q signal is continued until the MCF signal from the receiver is received.
When receiving the PS-Q signal and transmitting the MCF signal, the transmission is continued until one continuous signal of 40 signals is detected from the transmitter.

The exchange of the above procedure signals is shown in FIG. In FIG. 21, V.I. 27t
er. 29, V.I. 17 communication, and the lower side is V.17 communication. 8,
V. 34 communications, both of which are transmitted from the receiver MC
This is an example in which the transmitter cannot receive the F signal once. Further, FIG. 8, V.I. 34 communication is shown in contrast to a conventional procedure. The upper part shows the procedure of this embodiment and the lower part shows the procedure and signal exchange of the conventional example, both of which are examples in which the transmitter cannot receive the MCF signal transmitted by the receiver once.

Further, when the transmitter receives an RNR signal from the receiver after transmitting one page of image information, 21,
V. 27ter, V.I. 29, V.I. 17 When executing communication, R
R signal is retransmitted. 8, V.I. At the time of performing the 34 communication, the transmission of the RR signal is continued until the MCF signal from the receiver is received.

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

In FIG. 2, the operation starts at S0 and S2
Then, the signal of the signal level "0" is output to the signal line 20a to turn off the CML. In S4, a signal of signal level "0" is output to the signal line 20d, and the CML is turned off.

In S6 and S8, it is determined whether or not the outgoing call and the incoming call are selected. When the outgoing call is selected, the process proceeds to S12, and when the incoming call is selected, the process proceeds to S106, and both are selected. If not, the process proceeds to S10 to perform other processing.

At S12, a signal of signal level "1" is output to the signal line 20d to turn on the CML. In S14, a pre-procedure is performed. In S16, the other party's V. It is determined whether or not it has a communication function. If it has the communication function, the process proceeds to S66, and If the communication function is not provided, the process proceeds to S18.

In S18, V.V. 21 pre-procedure. 27ter, V.I. 29, V.I. 17 images are transmitted.
In S22, it is determined whether there is a next page. If there is a next page, the process proceeds to S26. If there is no next page, the process proceeds to S24. 21 post-procedures are performed.

In S26, 3 is set in Counter. In S28, following the preamble signal for one second, PP
When the S-MPS signal is One is transmitted in 21 mode. S3
At 0, 3 seconds are set in Timer4.

In S32, S34, S36 and S38, T
V.imer4 is not over before V.I. It is determined whether or not the MCF signal, the PPR signal, and the RNR signal in the 21 mode have been received. When the MCF signal in the 21st mode is received, the process proceeds to S20, and When the PPR signal in the P.21 mode is received, the process proceeds to S20, and When an RNR signal in the 21 mode is received, the process proceeds to S46, and when Timer 4 times out, the process proceeds to S40.

In S40, the value of Counter is incremented by one. In S42, it is determined whether or not the value of Counter is 0 or less.
Since the MPS signal has been transmitted three times, the process proceeds to S44. One DCN signal is transmitted in the 21 mode, and when Counter exceeds 0, S28
Proceed to.

In S46, 60 seconds is set in Timer5. In S48, 3 is set to Counter. In S50, following one second of the preamble signal, V.V.
One RR signal is transmitted in the 21 mode. In S52, T
Set 3 seconds to imer4.

In S54, V.V. It is determined whether an MCF signal in the 21 mode has been received. If an MCF signal has been received, the process proceeds to S20, and if an MCF signal has not been received, the process proceeds to S56.

In S56, it is determined whether or not the timer 5 has timed out. If the time has elapsed, the process proceeds to S44, and if not, the process proceeds to S58.

At S58, V.V. It is determined whether an RNR signal in the 21 mode has been received. If an RNR signal has been received, the process proceeds to S48, and if an RNR signal has not been received, the process proceeds to S60.

In S60, it is determined whether or not Timer4 has timed out.
The process proceeds to 54, and when the time is over, the process proceeds to S62.

In S62, the value of Counter is decremented by one. In S64, it is determined whether or not Counter is 0 or less, and if it is 0 or less, the process proceeds to S44,
If it exceeds 0, the process proceeds to S50.

In S66, V.V. 8 procedures. 3
4 pre-procedure. The transmission of 34 images is sequentially performed. Then, in S72, it is determined whether or not there is a next page. 34 Perform post-procedures,
If there is a next page, the process proceeds to S76.

In step S76, after transmitting and receiving the Sh, Sh _* , ALT, and E signals, the preamble signal is transmitted for 250 ms.
In S78, 10 seconds are set in Timer4. S8
0, V. In 34 control channels, P
The PS-MPS signal is continuously transmitted.

In S82, V.V. It is determined whether or not the MCF signal has been received on the control channel No. 34 of the MCF.
If a signal is received, the process proceeds to S90, and if an MCF signal is not received, the process proceeds to S84.

In S84, V.V. 34, it is determined whether a PPR signal has been received on the control channel.
If a signal is received, the process proceeds to S94, and if a PPR signal is not received, the process proceeds to S86.

In S86, V.V. It is determined whether or not the RNT signal on the control channel No. 34 has been received.
If a signal is received, the process proceeds to S98, and if an RNT signal is not received, the process proceeds to S88.

In S88, it is determined whether or not the timer 4 has timed out. If the time is over, the process proceeds to S2, and if not, the process proceeds to S80.

In S90, continuous transmission of "1" is performed. And
In S92, V.V. MC on 34 control channels
It is determined whether or not the end of the F signal is detected. If the end of the MCF signal is detected, the process proceeds to S70. If the end of the MCF signal is not detected, the process proceeds to S90.

In S94, "1" is continuously transmitted. Then, in S96, V.V. 34, it is determined whether or not the end of the PPR signal in the control channel has been detected.
When the end of the signal is detected, the process proceeds to S70, and when the end of the PPR signal is not detected, the process proceeds to S94.

In S98, 60 seconds is set in Timer5. In S100, V.V. The RR signal is continuously transmitted on the 34 control channels. In S102, V.V. It is determined whether or not the MCF signal has been received on the control channel of No. 34.
If the MCF signal has not been received, the process proceeds to S104.

In S104, it is determined whether or not the timer 5 has timed out. If the time has expired, the flow proceeds to S2, and if not, the flow proceeds to S100.

In S106, a signal of signal level "1" is output to the signal line 20a to turn on the CML. In S108, a pre-procedure is performed. In S110, V.P. 3
It is determined whether there is a communication function of V.4. If there is a communication function, the process proceeds to S132, and 34 if there is no communication function
Proceed to 112.

In S112, V.V. 21. Perform the pre-procedure.
In S114, V.V. 27ter, V.I. 29, V.I. At 17, the image signal is received. In S118, V.V. It is determined whether or not a PPS-EOP signal in the P.21 mode has been received. The post-procedure 21 is executed, and if not received, the process proceeds to S120.

At S120, V.V. PPS in 21 mode
It is determined whether or not the MPS signal has been received. If the MPS signal has been received, the process proceeds to S126, and if not, the process proceeds to S122.

In S122, it is determined whether or not Timer2 has timed out. If timed out, the process proceeds to S2, and if not, the process proceeds to S118.

In S126, it is determined whether or not the received image signal has an error frame. If there is an error frame, the process proceeds to S130, and after transmitting the preamble signal for one second, the V.100 signal is output. 2
One PPR signal is transmitted in one mode, and if there is no error frame, the process proceeds to S127.

In S127, it is determined whether or not the next page can be received. If the next page can be received, the process proceeds to S128, and after transmitting the preamble signal for one second, the V.V. M in 21 mode
If one CF signal is transmitted and the next page cannot be received, S
Proceed to 186.

At S132, V.V. 8 procedures. 34, and in S136, V. 34 image signal reception,
In S138, V.V. S of the control channel signal of No. 34
After transmitting and receiving the h, Sh _* , ALT, and E signals, a flag is transmitted (Sh _* is a phase inversion signal of Sh, and Sh is shown with an overline in the drawing).
At 140, 10 seconds are set in Timer2. S1
42, The flag is continuously transmitted on the 34 control channels.

In S144, V.V. It is determined whether a PPS-MPS signal on the control channel of No. 34 has been received. 34, and the process proceeds to S146 if the post-procedure has not been received.

In S146, V. It is determined whether a PPS-MPS signal on the control channel of No. 34 has been received.
Go to 48.

In S148, it is determined whether or not Timer2 has timed out. If timed out, the process proceeds to S2, and if not, the process proceeds to S142.

In S152, V. It is determined whether or not the flag in the control channel of No. 34 has been transmitted for 250 ms or more. If the flag has not been transmitted for 250 ms or more, the process proceeds to S154, and the flag is transmitted so that the total becomes 250 ms.
If the flag has been transmitted for 50 ms or more, the process proceeds to S156.

In step S156, it is determined whether or not the received image signal has an error frame. PPR signal is continuously transmitted on the control channel No. 34, and if there is no error frame, SPR
Proceed to 164.

In S160, it is determined whether or not 40 "1s" have been detected. If detected, the flow proceeds to S136, and if not, the flow proceeds to S162.

In S162, it is determined whether or not Timer2 has timed out. If timed out, the process proceeds to S2, and if not, the process proceeds to S158.

In S164, it is determined whether or not the next page can be received. If the next page can be received, the process proceeds to S166, and the process proceeds to S166. The MCF signal is continuously transmitted on the control channel No. 34, and if the next page cannot be received, the process proceeds to S172.

In S168, it is determined whether or not 40 "1s" have been detected. If 40 "1s" have been detected, S136 is executed.
The process proceeds to S170 if 40 “1” s have not been detected.

In S170, it is determined whether or not Timer2 has timed out. If timed out, the process proceeds to S2, and if not, the process proceeds to S166.

At S172, 60 seconds is set in Timer5. In step S174, V.V. The RNR signal is continuously transmitted on the 34 control channels.

In S176, it is determined whether the reception of the next page is possible or not.
V. The MCF signal is continuously transmitted on the 34 control channels, and if not possible, the process proceeds to S178.

In S178, it is determined whether or not the timer 5 has timed out. If the time has elapsed, the process proceeds to S2, and if not, the process proceeds to S174.

In S182, it is determined whether or not 40 "1s" have been detected. If detected, the flow proceeds to S136, and if not, the flow proceeds to S184.

At S184, the Timer 5 determines whether or not the time is over.
The process proceeds to S180 if the time is not over.

In S186, 60 seconds is set in Timer5. In S188, following transmission of the preamble signal for one second, V.S. One RNR signal in the 21 mode is transmitted.

In S190, V.V. It is determined whether or not the RR signal in the 21 mode has been received. If the RR signal has been received, the process proceeds to S194, and if not, the process proceeds to S192.

In S192, the Timer 5 determines whether or not the time is over.
The process proceeds to S190 if the time is not over.

In S194, it is determined whether or not the reception of the next page is possible. If it is possible, the process proceeds to S128, and if not, the process proceeds to S188.

In the first embodiment described above, the PP
The transmission and reception of the S-MPS signal has been described as an example.
-EOM signal, PPS-EOP signal, PPS-NULL
The same can be applied to transmission and reception of signals.

Next, a second embodiment of the present invention will be described.

FIG. 12 is a block diagram showing the configuration of a facsimile apparatus according to the second embodiment.

The facsimile apparatus in this embodiment is
An international communication selection button 22 and an international communication selection display circuit 24 are provided in addition to the configuration of the facsimile apparatus of the first embodiment.

The international communication selection button 22 is a button for selecting international communication. When this button 22 is pressed,
A pressing pulse is generated on the signal line 22a.

The international communication selection display circuit 24 is a circuit for displaying whether or not international communication has been selected.
When a clear pulse is generated at 0f, the display is not performed and "display" is performed every time a press pulse is generated on the signal line 22a.
→ Repeat "No display" → "Display". The international communication selection and display circuit 24 outputs a signal of signal level "1" to the signal line 24a when "displaying", and outputs a signal of signal level "0" to the signal line 24a when "not displaying". Is output.

In the second embodiment, the control circuit 20
Is based on ITU-T Recommendation T. In a facsimile machine executing the G3 protocol of V.30, 21, V.I. 27te
r, V.R. 29, V.I. 17 communication means; 8, V.I. 34, and the control of the echo at the time of executing the protocol is changed according to these communication means.

Specifically, the following control is mainly performed. V.
21, V.I. 27ter, V.I. 29, V.I. In the case where the communication by the communication means is executed, when the protocol signal transmitted by the own device is received in the response reception at the time of transmitting the protocol signal, it is determined to be an echo and this signal is ignored. On the other hand, V.
8, V.I. When communication is performed by the communication means 34, no echo determination is made in response reception when a protocol signal is transmitted.

When the international communication is selected, V.V. 2
1, V.I. 27ter, V.I. 29, V.I. When the communication by the communication means 17 is executed, after receiving the initial identification signal (DIS signal) twice, the processing shifts to the transmission of the DCS group signal and the echo suppressor is enabled. On the other hand, V. 8, V.I.
34, when the communication by the communication means is executed, the initial identification signal (DIS
Signal) once, the process shifts to the transmission of the DCS group signal.

The other structure is the same as that of the first embodiment, and the description thereof will be omitted, and the description will be made using the same reference numerals.

FIGS. 13 to 19 are floats showing the control flow of the control circuit 20 in the second embodiment.

In FIG. 13, the operation starts in S200, and in S202, a clear pulse is generated on the signal line 20f, and the international communication selection display circuit 24 does not display. S20
In S4, it is determined whether facsimile transmission is selected, and if facsimile transmission is selected, the process proceeds to S208,
If facsimile transmission has not been selected, the process proceeds to S206, where other processing is performed. At S207, a signal of signal level “0” is output to the signal line 20a to turn off the CML, and
Proceed to 204.

In S208, a signal of signal level "1" is output to signal line 20a, and CML is turned on. In S210, the information of the signal line 24a is input, and the international communication selection circuit 2
It is determined whether or not No. 4 is displayed.
Proceed to S12, and if not displayed, proceed to S272.

In S212, 35 seconds are set in the T1 timer. In S214, S216, and S218, the V.V. 21 DIS signal or V.21. 8 is detected, and whether or not the ANSam signal of V.8 is detected is determined. When the DIS signal of No. 21 is detected, S22
0; When the ANSam signal of No. 8 is detected, S28
The process proceeds to S4, and when the T1 timer times out, S204
Proceed to.

In S220, the discrimination is made based on the detected DIS signal. It is determined whether there is a communication function of V.34. If there is a communication function of V.34, the process proceeds to S282, and
If there is no communication function of No. 34, the process proceeds to S222 and the second DI
Shift to reception of S signal.

In S222 and S224, the V.V. It is determined whether or not the DIS signal has been detected at V.21. When the DIS signal of No. 21 is detected, the process proceeds to S226.
Proceed to 204.

In S226, V.V. 21 NSS / TSI /
Transmission of DCS signal, Tr (training) in S228
Transmission of a TCF signal; 21 at step S232. 27ter, V.I. 29,
V. The transmission of the 17 image signals is sequentially performed.

In S234, S236, and S238, the information of the next page is determined.
To V. 21 intermediate procedures at the break of the execution page,
If there is no next page, the process proceeds to S242, and 21 is executed, and if there is a next page at a page break and there is a mode change, the process proceeds to S244, where The intermediate procedure of No. 21 is executed, and if there is a next page at a page break and there is no mode change, the process proceeds to S246.

In the description of the second embodiment, this S246
The control to which the present invention is applied in the following processing will be described in detail.

At S246, 0 is set to a counter Counter that counts three retransmissions of the PPS-MPS signal. In S248, V.V. 21 PPS-MPS signals are transmitted.

In S250, the flag PPSDET indicating that the PPS-MPS signal has been detected is cleared. S
At 252, 3 seconds are set to the T4 timer.

In S254, V. It is determined whether a significant signal has been detected. Here, it is assumed that the RNR signal, the PIP signal, and the PIN signal are not considered as the significant signal. When a significant signal is detected, the process proceeds to S262, and when a significant signal is not detected, the process proceeds to S256.

In S256, it is determined whether or not the time of the T4 timer has expired.
Proceed to 254, and when the time is over, proceed to S258,
Increment the value of Counter by one.

At S260, it is determined whether or not the value of Counter is 3 or more. If it is 3 or more, the process proceeds to S204, and if it is less than 3, the process proceeds to S248.

In steps S262, S264, and S266, the detected significant signal is determined. If a PPS-MPS signal is detected, the process proceeds to S232. If a PPR signal is detected, the process proceeds to S23.
The process proceeds to S204, and if anything other than these is detected, the process proceeds to S204.

In S268, whether the flag PPSDET is 0, that is, after transmitting the PPS-MPS signal this time,
For the first time, it is determined whether or not a PPS-MPS signal has been received. If PPSET is 0, the process proceeds to S270, and the PPS
Set 1 to DET and PP if PPSDET is not 0
It is an error to receive the PPS-MPS signal twice after transmitting the S-MPS signal, and the process proceeds to S204.

In S272, 35 seconds are set in the T1 timer. In S274, S276, and S278, V.V. 21 DIS signal or V.21. 8 is detected, and whether or not the ANSam signal of V.8 is detected is determined. When the DIS signal of No. 21 is detected, S28
0; When the ANSam signal of No. 8 is detected, S28
The process proceeds to S4, and when the T1 timer times out, S204
Proceed to.

At S280, V.V. 21 by detecting the DIS signal, and the other party determines the V.21 DIS signal. It is determined whether there is a communication function. If there is a communication function of V.34, the process proceeds to S282, and S22 if there is no communication function
Proceed to 6.

In S282, V.V. 8 CI signal transmission, S
In 284, V.V. 8 is received, and in S286, the ANSam signal is received. 8 at step S288. JM of 8
Signal reception. 8 is transmitted.

Next, in S291, the T1 timer is reset to 35 seconds. Transmission of a 34-line probing signal. The transmission of the long training signal is performed.

In S296, V.V. It is determined whether or not the DIS signal of No. 34 has been detected. If detected, the process proceeds to S302, and if not detected, the process proceeds to S298.

In S298, it is determined whether or not the time of the T1 timer has expired.
If the time is not over, proceed to S300,
V. The flag of No. 34 is transmitted.

In S302, V.V. 34 NSS / TSI /
DCS signal transmission. Then, the flag 34 is transmitted. In S306, V.V. It is determined whether the CFR signal of No. 34 has been received, and if not received, the process proceeds to S304,
Upon reception, the process proceeds to S308, where Transmit 34 consecutive 1s.

In S310, V.P. It is determined whether or not the absence of the flag No. 34 has been detected. If no flag of V.34 is detected, the process proceeds to S312, and If the absence of the flag at 34 has not been detected, the process proceeds to S308.

In S312, V. 34. The primary channel signal is transmitted. S314, S316, S318
In step S320, the information of the next page is determined. The intermediate procedure of 34 is performed, and if there is no next page at the page break, the process proceeds to S322,
V. 34, the following procedure is performed. If there is a next page at a page break, and if there is a mode change, the process proceeds to S324. 3
The intermediate procedure of No. 4 is performed. If there is a next page at a page break and there is no mode change, the process proceeds to S326.

In the description of the second embodiment, this S326
The control to which the present invention is applied in the following processing will be described in detail.

In S326, 0 is set to a counter Counter that counts three retransmissions of the PPS-MPS signal. In S328, V.V. Then, the PPS-MPS signal is transmitted.

In S330, 3 seconds are set in the T4 timer. In S332, the V.V. It is determined whether 34 significant signals have been detected. Note that the significant signal here is RNR
Signals, PIP signals, and PIN signals are not considered.
Then, when a significant signal is detected, the process proceeds to S334, where V.V. 3
4 is transmitted.

In S336, it is determined whether or not the time of the T4 timer has expired.
Proceed to 332, and when the time is over, proceed to S338,
Increment the value of Counter by one.

In S340, it is determined whether or not the value of Counter is 3 or more. If it is 3 or more, the process proceeds to S204, and if it is less than 3, the process proceeds to S328.

At S342 and S344, the detected V.V. 3
4 is determined, and the signal is determined to be the MCF signal in S34.
The program proceeds to S346 if the signal is a PPR signal, and to S204 if the signal is other than these.

In S346, V.V. 34, and transmission of V.34 from the partner machine is performed in S348. It is determined whether or not the absence of the flag of No. 34 has been detected, and if not detected, the flow proceeds to S346, and if detected, the flow proceeds to S312.

In the above description of the second embodiment, the case where only the PPS-MPS signal is used as the control of response reception after the transmission of the PPS-Q signal has been described. NULL signal, PPS-
The same applies to the EOP signal.

In the second embodiment described above, whether or not international communication is selected is selected by pressing a button. Instead, information on whether or not international communication is selected is used. One-touch dialing and abbreviated dialing may be registered, and the reception of the DIS signal twice may be controlled based on such information.

In the above embodiment, the ITU-T Recommendation V. 8, V.I. Although the facsimile communication conforming to the Recommendation No. 34 has been described, the present invention can be applied to a facsimile apparatus based on a communication protocol having the same function as the recommendation.

In the above embodiments, the stand-alone type facsimile apparatus has been described as an example. However, the present invention is not limited to this. For example, a copy function, an electronic file function, and a data processing function are combined with a communication function. Of course, it can be applied to facsimile communication control in the integrated data processing system.

[0127]

As described above, the first and eighth embodiments of the present application are described.
According to the invention of ITU-T Recommendation V. 8, V.I. In the case of 34 communication, if there is no problem even on an international line with a delay and there is no delay on the domestic line, even if an error occurs in the protocol, the receiver becomes busy and weights are applied. But immediately, we can move on to the next protocol,
Since there is no wasted time loss in the protocol, it is possible to execute facsimile communication taking full advantage of the fast primary channel transmission.

Further, according to the second invention of the present application, the V.V.
8, V.I. At the time of performing the communication 34, after receiving the information of the primary channel, for example, when the decoding process of the primary channel information is not immediately performed, the RNR signal is transmitted, and immediately after that, the decoding process of the primary channel information is completed. The MCF signal can be transmitted immediately without waiting for several hundred milliseconds by the preamble signal, and then it can be shifted to the reception of the primary channel information, and the communication time can be reduced.

According to the third and fourth inventions of the present application, V.V. 8, V.I. Taking advantage of the fact that the protocol signal is band-divided at the time of communication execution, the control signal can be retransmitted until a significant signal from the partner device is detected. The extension can be reduced (from 3 seconds to several hundred mS), the reliability of the protocol in communication can be increased, and even if there is a delay like an international circuit, the protocol can be executed reliably and the communication Reliability can be increased.

According to the fifth to seventh and ninth inventions of the present application, V.V. 21, V.I. 27ter, V.I. 29, V.I. 1
In the 7th communication, it is possible to appropriately cope with international communication, the reliability of communication is increased, and 8, V.I. In the 34 communication, a malfunction due to error processing and an increase in communication time in the previous procedure are eliminated.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing the operation of the first embodiment.

FIG. 3 is a flowchart showing the operation of the first embodiment.

FIG. 4 is a flowchart showing the operation of the first embodiment.

FIG. 5 is a flowchart showing the operation of the first embodiment.

FIG. 6 is a flowchart showing the operation of the first embodiment.

FIG. 7 is a flowchart showing the operation of the first embodiment.

FIG. 8 is a flowchart showing the operation of the first embodiment.

FIG. 9 is a flowchart showing the operation of the first embodiment.

FIG. 10 is an explanatory diagram showing a communication procedure of the first embodiment.

FIG. 11 is an explanatory diagram showing a communication procedure of the first embodiment in comparison with a conventional procedure.

FIG. 12 is a block diagram showing a second embodiment of the present invention.

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

FIG. 14 is a flowchart showing the operation of the second embodiment.

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

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

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

FIG. 18 is a flowchart showing the operation of the second embodiment.

FIG. 19 is a flowchart showing the operation of the second embodiment.

[Explanation of symbols]

 2 ... NCU, 4 ... telephone, 6 ... hybrid circuit, 8 ... modulator / demodulator, 10 ... ANSam transmission circuit, 12 ... addition circuit, 14 ... read circuit, 16 ... recording circuit, 18 ... memory circuit, 20 ... control circuit, 22 ... International communication selection button, 24 ... International communication selection display circuit.

Claims (9)

[Claims] 1. An ITU-T Recommendation V. 21, V.I. 27te
r, V.R. 29, V.I. 17, V.I. 8, V.I. 34. A facsimile apparatus having communication means, 21, V.I. 27ter, V.I. 29, V.I. 17 communication execution, and 8, V.I. 34. A facsimile apparatus wherein the transmission timing of a control signal is changed between the time of execution of communication. 2. The receiver according to claim 1, wherein after the transmitter transmits one page of image information,
When a V. signal is received, 21, V.I. 27ter,
V. 29, V.I. When the communication is executed, the RR signal is retransmitted. 8, V.I. 34, the communication from the receiver
A facsimile apparatus wherein transmission of an RR signal is continued until a CF signal is received. 3. The method according to claim 1, wherein 21, V.I. 27ter, V.I. 29, V.I. At the time of 17 communication execution, in the response reception after the transmitter transmits the PPS-Q signal, when there is no response from the receiver,
After 3 seconds, the PPS-Q signal is retransmitted, and the receiver
When the P.-Q signal is received, the MCF signal is transmitted only once for the PPS-Q signal; 8, V.I. 34 communication, the transmitter is PPS
When transmitting the -Q signal, the transmission of the PPS-Q signal is continued until the MCF signal from the receiver is received, and when the receiver receives the PPS-Q signal and transmits the MCF signal,
A facsimile apparatus wherein transmission of an MCF signal is continued until a predetermined number of continuous signals are detected from a transmitter. 4. The facsimile apparatus according to claim 2, wherein the predetermined number of continuous signals is one signal of 40 continuous signals. 5. The method according to ITU-T Recommendation V.5. 21, V.I. 27te
r, V.R. 29, V.I. 17, V.I. 8, V.I. 34 communication means, and according to ITU-T Recommendation T.34. 30. A facsimile machine which executes the G3 protocol of G.30. 21, V.I. 27ter, V.I. 29, V.I. 17 communication execution, and 8, V.I. 34. A facsimile apparatus wherein the control of the echo at the time of executing a protocol is changed between when executing communication. 6. The method according to claim 5, wherein 21, V.I. 27ter, V.I. 29, V.I. At the time of communication execution, in the response reception at the time of transmitting the protocol signal, when the protocol signal transmitted by the own device is received, it is determined that the echo is an echo, and this signal is ignored. 8, V.I. 34. A facsimile apparatus characterized in that echo determination is not performed when receiving a response at the time of transmitting a protocol signal when executing communication. 7. The method according to claim 5, wherein when international communication is selected, the V.100 communication is performed. 21, V.I. 27t
er. 29, V.I. At the time of communication, after receiving the initial identification signal twice, the process proceeds to the transmission of the DCS group signal, and the echo suppressor is enabled. 8, V.I. 34. A facsimile apparatus characterized by shifting to transmission of a DCS group signal when an initial identification signal is received once at the time of executing communication. 8. ITU-T Recommendation V. 21, V.I. 27te
r, V.R. 29, V.I. 17, V.I. 8, V.I. 34. A method for controlling a facsimile apparatus having communication means, comprising: 21, V.I. 27ter, V.I. 29, V.I. 17 communication execution, and 8, V.I. 34. A control method for a facsimile apparatus, wherein a transmission timing of a control signal is changed between when communication is performed. 9. ITU-T Recommendation V. 21, V.I. 27te
r, V.R. 29, V.I. 17, V.I. 8, V.I. 34 communication means, and according to ITU-T Recommendation T.34. 30. A method of controlling a facsimile apparatus which executes the G3 protocol according to 21, V.I. 27ter, V.I. 29, V.I. 17 communication execution, and 8, V.I. 34 A control method for a facsimile apparatus, wherein the control for the echo at the time of executing a protocol is changed between when executing communication.