JPH0779334A - Facsimile communication method - Google Patents

Abstract

PURPOSE:To reduce a control procedure time till document data are sent. CONSTITUTION:In the facsimile communication method provided with a control procedure communicating a communication procedure signal by a low speed modem 5 and a control procedure communicating a communication procedure signal by a high speed modem 6, after dialing by a caller side being a sender side, when the caller side uses the low speed modem 5 to send repetitively a high speed procedure request signal SNSS without detection of line connection and a called side being a receiver side receiving the high speed procedure request signal SNSS sends a high speed procedure reply signal SNSF being an acknowledge of the high speed procedure request signal SNSS by a low speed modem 5, the succeeding control procedure is communicated by using a high speed modem 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is based on ITU-T Recommendation T30.
The present invention relates to a G3 standard facsimile machine standardized by the above, and more particularly to a facsimile communication method in which the communication protocol is speeded up.

[0002]

2. Description of the Related Art In recent years, a widely used facsimile machine is mainly a Group 3 (G3) facsimile machine standardized by ITU-T Recommendation T30.

The communication protocol in the G3 facsimile apparatus according to this standard is performed by the procedure shown in FIG.

FIG. 19 is a signal sequence diagram showing an example of a communication procedure in a G3 standard facsimile apparatus.

In FIG. 19, a thin solid line of each signal, that is, TSI, NSS, EOP, DCN on the transmitter side, and NSF, CSI, DIS, CFR, and MCF on the receiver side are low-speed signals, thick solid lines, that is, TCF and PIX on the transmitter side are high-speed signals, thin dotted lines, that is, CNG, and CE on the receiver side.
D is a tone signal. The dial on the transmitter side is a signal to the network.

First, the communication protocol from the transmitter to the data transfer will be described.

The transmitter dials the other party according to the transmission request from the operator. After that, when the line is connected, the tone signal CNG is transmitted. Then, the tone signal CED and the low speed signals NSF, CSI, DIS from the receiving side are received, and if the manufacturer code of the NSF matches the transmitter of its own, the transmitter sends TSI, NSS as low speed signals. Further, the training check signal TCF is transmitted at the high signal speed designated by NSS. This rate is also the data transfer rate. Finally, by receiving the reception preparation confirmation signal CFR from the receiving side, the writing data P at that speed is received.
Transfer IX.

Next, the receiver will be described.

The receiver detects the tone signal CNG when the line is connected by the incoming call, and when the tone signal CNG from the transmitter is detected, the receiver transmits the tone signal CED and the low speed signals NSF, CSI and DIS. If the transmitter and receiver have the same manufacturer code, the transmitter sends low speed signals TSI and NSS and a training check signal TCF at a high signal speed designated by NSS. The receiver checks the TCF, and if there is no error, the reception preparation confirmation signal CFR is transmitted, so that the data transfer is performed at that speed.

[0010]

[Problems to be Solved by the Invention] The above-mentioned conventional G3
In the communication protocol of the standard facsimile machine,
It takes about 13 seconds before the image data is actually transmitted.
However, for example, the transmission time for one A4 size original document is about 6 seconds at a communication speed of 14.4 KBPS, which means that the control procedure takes too long compared to the image transmission time.

Therefore, the present invention has been made in view of the above problems, and it is a first object of the present invention to provide a facsimile communication method in which the control procedure time until the transmission of document data is shortened.

Further, in the above-described negotiation of the data communication speed of the conventional example, the data reception speed capability of the receiver is notified from the receiver to the transmitter, and then the data communication execution speed is notified from the transmitter to the receiver, The transmitter has the right to decide the data communication speed.

In addition to the above-mentioned conventional communication protocol, for example, as described in Japanese Patent Laid-Open No. 61-263359, a high speed procedure for communicating a procedure signal with a high speed signal has been proposed. In this type of high-speed procedure technology, a transmitter outputs a procedure shortening instruction signal by a low-speed modem, and when there is a response, a control signal on the subsequent transmission side is transmitted by a high-speed signal.

However, although the technique disclosed in the above publication does not include a description of the data communication speed, it is not within the range of estimation. However, the transmitter that sends the procedure shortening instruction signal first determines the data communication speed capability on the receiver side. It is supposed to be sent to. As a result, the receiver side transmits the data communication execution speed to the transmitter side. That is, even in the technique disclosed in the above publication, the sender does not have the right to determine or specify the data communication speed.

As described above, in the conventional high-speed communication protocol, it is basically the calling side and the transmitter side that bear the line usage fee. Therefore, there is a problem in that the transmitter side cannot be given the right to decide and specify the data communication speed.

Therefore, the present invention has been made in view of the above problems, and in determining the data communication speed, the calling side has the right to specify the data communication speed or the right to abandon the right to specify. A second object is to provide a facsimile communication method.

The above-mentioned training check signal TCF
Is a "0" continuous signal for 1.5 seconds ± 10% by the high speed modem, and is a signal for checking the reliability of data transfer at that speed. In addition, non-standard function setting signal N
SS is a low speed signal for using the non-standard function, and the transmitting terminal identification signal TSI is a low speed signal indicating the telephone number of the transmitting station.

In the case described in the above-mentioned Japanese Patent Laid-Open No. 61-263359, when a procedure shortening instruction signal is transmitted from a transmitter by a low speed modem and a response is received, the control signal on the transmitting side is thereafter transmitted by a high speed signal. Sending out. Then, there is a description that the control procedure signals TCF, TSI, NSS are transmitted all at once as a high speed modem signal. According to this, TCF is a continuous signal of "0" data, and TSI and NSS are HD.
It is an LC frame, and it is not rational because the two types of signal forms coexist.

On the other hand, modern modems have an HDLC function. The HDLC function means that transmission data is automatically wrapped in an HDLC frame for transmission and HDL is automatically received for reception.
This is a function for extracting data from the C frame. Therefore, TCF which is a continuous signal of “0” data and HDLC
When transmitting or receiving the frames TSI and NSS all at once, there is a problem that the HDLC function built in the modem cannot be used. Therefore, the software amount of the main control unit increases.

Therefore, the present invention has been made in view of the above problems, and a third object thereof is to provide a facsimile communication method in which the software amount of the main control unit is reduced by a rational training check signal. Is.

In addition to the conventional G3 communication protocol described above, a high-speed procedure for communicating a procedure signal with a high-speed signal is also available.
For example, it is proposed in Japanese Patent Laid-Open No. 4-301963.

In this embodiment, as a premise of performing the high speed procedure, it is necessary that the communication according to the standard procedure succeeds a certain number of times. If communication fails due to an error, the next communication is performed by the standard procedure.

However, it is unreasonable to return to the standard procedure because the line condition is good but it happens to fail. In addition, there is a problem if the predetermined number of standard procedures is reduced even though the line condition is bad.

Therefore, the present invention has been made in view of the above problems, and a fourth object thereof is to provide a facsimile communication method for determining the selection of the standard procedure and the high-speed procedure based on the success rate in the past. .

[0025]

According to a first aspect of the present invention, there is provided a facsimile communication method including a control procedure for communicating a communication procedure signal by a low speed modem and a control procedure for communicating a communication procedure signal by a high speed modem. After dialing, the calling side repeatedly sends the high speed procedure request signal SNSS by the low speed modem without detecting the line connection, and the high speed procedure request signal S
When the called side receiving the NSS sends out a high speed procedure response signal SNSF which is a response to the high speed procedure request signal SNSS by the low speed modem, the following steps are communicated by the high speed modem.

A facsimile communication method according to a second aspect of the present invention comprises a control procedure for communicating a communication procedure signal by a low speed modem and a control procedure for communicating a communication procedure signal by a high speed modem, wherein the calling side requests the high speed procedure by the low speed modem. When the called party that has transmitted the signal SNSS and has received the high-speed procedure request signal SNSS sends the high-speed procedure response signal SNSF, which is a response to the high-speed procedure request signal SNSS, with the low-speed modem, the subsequent control signals are communicated with the high-speed modem. , The high speed procedure request signal SN
The SS has data communication designated speed information or data communication speed capability information of the calling terminal.

A facsimile communication method according to a third aspect of the present invention is a facsimile communication method comprising a control procedure for communicating a communication procedure signal by a low speed modem and a control procedure for communicating a communication procedure signal by a high speed modem. HDLC frame conversion means and TS
A means for communicating I and NSS with high-speed signals, and TCF and TS
It is provided with means for converting I and NSS into multiple frames and means for checking a line error.

A facsimile communication method according to a fourth aspect of the present invention is a facsimile communication method comprising a control procedure for communicating a communication procedure signal with a low speed modem and a control procedure for communicating a communication procedure signal with a high speed modem. The information about the communication function of the other party and the communication result are stored in the storage means in correspondence with the information of 1. When it is low, the communication procedure by the high-speed modem is used, and when it is low, the communication procedure by the low-speed modem is performed.

[0029]

According to the present invention, the transmitting side transmits the high speed procedure request signal SNSS after dialing, and the receiving side receives the high speed procedure request signal SNSS and then the high speed procedure response signal SNSS.
By transmitting the SF to the transmitting side, the control procedure thereafter can be communicated by a high-speed signal.

In the second aspect, the calling side transmits the SNSS having the data communication speed information and the data communication speed designation information or the data communication capability information in the SNSS to the called side, and the called side receiving the SNSS , S by the data communication speed designation information or data communication capability information in the SNSS
The meaning of the data communication speed information in the NSS is understood as the data communication designated speed or the data communication speed capability of the calling terminal, and the result of comparison with the data transfer speed capability of the called side is set as the data communication execution speed information in the SNSF, By transmitting it to the calling side, the speed of the subsequent high speed data can be determined.

According to a third aspect of the present invention, means for converting the training check signal TCF into an HDLC frame, and TS
A means for communicating I and NSS with high-speed signals, and TCF and TS
By providing means for converting the I and NSS into multiple frames and means for checking a line error, a rational training check can be performed and the software load on the main controller is reduced.

According to a fourth aspect of the present invention, the transmission side stores the information about the communication function of the other party and the communication result in correspondence with the information of the telephone number of the other party, and the communication success rate with the other party in the past is used. It is possible to determine the communication procedure, which is the standard procedure or the high-speed procedure, and maintain the communication success rate of all the communication from the past to the present at a certain value or more.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A facsimile communication method according to an embodiment of the present invention will be described in detail below with reference to the drawings.

<First Embodiment> FIG. 1 is a block diagram showing the arrangement of a facsimile apparatus according to the first embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes an operation unit, which is composed of various key input switches such as a one-touch dial key and a ten-key pad, a liquid crystal display and the like. A reading unit 2 is composed of an image sensor such as a CCD and reads a document. Reference numeral 3 denotes a main control unit, which controls the entire apparatus, and includes a microcomputer, a ROM storing a control program, and a peripheral device of the microcomputer such as a RAM for temporarily storing various data. Encoding and decoding of image signals and execution control of communication procedures are performed. A recording unit 4 records an image signal with a thermal printer or a laser printer. 5 is ITU
-T A low-speed modem defined by Recommendation V21, which is used for communication of normal control procedure signals. Reference numeral 6 is a high speed modem defined by ITU-T Recommendations V27ter, V29, V33 and V17, and is used for image signal communication. Reference numeral 7 is a network control unit (NCU) that captures the line 8.

The procedural operation before the high speed procedure, which is the main part of this embodiment, will be described below with reference to the signal sequence of FIG.

FIG. 2 is a signal sequence diagram showing an example of a communication procedure in the facsimile apparatus of the first embodiment of the present invention.

First, the operation of the transmitter will be described.

The transmitter dials the other party in response to the transmission request. After that, the tone signal CNG is transmitted after a certain period of time passes without confirming the line connection, and the low-speed signal SNSS is transmitted after 75 ± 20 ms.
Then, the tone signal CED and the low-speed signal NS from the receiving side
Detect F, CSI, DIS and SNSF. If they cannot be detected for a certain period of time, the low speed signal SNS
Only S is repeatedly transmitted. Then, the tone signal CED, the low speed signals NSF, CSI, DIS and SNSS from the receiving side are detected again. If the tone signal CNG is not detected for a fixed time, the low speed signal SNSS is transmitted after 75 ± 20 ms. Then, it waits for a signal from the receiver side. In this way, when there is no signal from the receiver,
The above operation is repeated. When the low speed signal SNSF is received from the receiver, the high speed procedure is started. In the fast procedure, NSF, CSI, D from the receiver
Wait for IS. This signal is a high speed signal and is multi-framed. When the reception is normally performed, the transmitter multiframes the TCF, TSI, and NSS, and sends them out as a high-speed signal. And the low speed signal CF from the receiver
It waits for R, and when it is received normally, it sends out the data.

Next, the operation of the receiver will be described.

The receiver detects the tone signal CNG and the low speed signal SNSS when the line is connected after the call is received. When the SNSS from the transmitter is detected, the receiver receives the low speed signal S
Send NSF and move to fast procedure. When CNG is detected, it is detected whether there is an SNSS immediately after CNG.
If SNSS is detected, send low speed signal SNSF,
Move to fast procedure. Further, when SNSS is not detected, or when neither CNG nor SNSS is detected, the standard communication procedure is started and the tone signal CED, the low speed signal NSF,
Send CSI and DIS. In the fast procedure, the receiver is N
High speed transmission of SF, CSI and DIS. After that, it waits for TCF, TSI, and NSS from the transmitter, and when it is received normally, sends CFR to the transmitter.

Here, the signal contents of NSF, CSI, and DIS are the same as in the procedure of the G3 facsimile apparatus, but they are different in that the speed is high. This speed may be the same as the data communication speed, but since it is before the line check is performed, it is safer to perform it at the minimum speed of the high speed modem. TCF, TSI, NS from transmitter
S must be performed at the same signal speed as data communication. The signal contents are the same as those in the G3 facsimile machine procedure except for TCF and TSI and NSS.

The high-speed pre-procedure operation, which is the essential part of the first embodiment of the present invention, will be described below with reference to the flow charts of FIGS.

FIG. 3 is a flow chart showing a high-speed pre-procedural operation of the transmitting side of the facsimile apparatus of the first embodiment of the present invention, and FIG. 4 is a high-speed receiving side of the facsimile apparatus of the first embodiment of the present invention. It is a flow chart which shows pre-procedure operation.

First, the transmitter will be described with reference to FIG.

When the operator sets the transmission original on the reading unit 2 and inputs the transmission instruction key on the operation unit 1, the process proceeds to step S11. The destination telephone number entered in the operation unit 1 in step S11 is the NCU 7 by the main control unit 3.
The NCU 7 performs a dialing operation on the line 8. In step S12, an interval of several seconds is set after the dialing is completed. This is because the line is not connected immediately after dialing. Step S1
In No. 3, CNG of 1100 Hz is transmitted for 0.5 seconds, and thereafter, the high speed procedure request signal SNSS is transmitted at low speed with a 75 ms interval.

In step S14, preparations are made for receiving the low speed signal and CED, and the timer is started. The timer value is CN
When the high speed procedure request signal SNSS is sent at a rate of two for each G signal, about 0.8 seconds is appropriate. In the next step S15, the high speed procedure response signal SNSF
Is detected. If the SNSF is detected, the process proceeds to the high speed procedure of this embodiment in step S24. If not detected, move to the next step S16, where CED, NSF,
Detects CSI and DIS. When either of these is detected, the standard procedure is followed in step S23. If not detected, the process proceeds to the next step S17. Here, it is to detect whether or not the time set in step S14 has elapsed, and if not time out, step S1
Return to 5. After all, in this routine, until the timeout occurs, the signals SNSF, CED, NSF, CS on the receiving side are received.
I, wait for DIS. When a time-out occurs in step S17, the process proceeds to step S18 and SNSS is transmitted. Then, in step S19, the timer is started with the same time limit setting as in step S14, and steps S20 to S22 perform the same operations as steps S15 to S17. However, step S2
If a time-out occurs in 2, the process proceeds to step S13.

Next, the receiver will be described with reference to FIG.

The facsimile machine in the reception standby state
In step S31, the NCU 7 detects an incoming call from the call signal from the line 8. After the incoming call is detected, the line is connected in step S32.

In step S33, the low speed signal and CNG
Prepare to receive and start the timer. In the next step S34, CNG is detected. If not detected, the process proceeds to the next step S35, and the high speed procedure request signal SN
SS is detected. When the SNSS is detected, the process proceeds to step S39, the high speed procedure response signal SNSF is transmitted, and the process proceeds to the high speed procedure in step S40. When SNSS is not detected in step S35, the process proceeds to the next step S36. Here, it is to detect whether or not the time set in step S33 has elapsed, and if it has not timed out, the process returns to step S34. After all, in this routine, until the timeout occurs, the signal CNG on the transmitting side,
Wait for SNSS. When a time-out occurs in step S36, the process proceeds to step S37, CED is output,
NSF, CSI and DIS are transmitted at low speed. As a result, the standard procedure is followed in step S38.

On the other hand, when CNG is detected in step S34, the process proceeds to step S41. Here, preparations for receiving the low-speed signal are made and the timer is started. In the next step S42, SNSS is detected, and until the timeout in step S43 occurs, SNSS is detected.
Is detected. When the SNSS is detected, the process proceeds to S39, the SNSF is transmitted, and the high speed procedure is performed. Also SNSS
If no time is detected and a timeout occurs, C in S37.
Send ED, NSF, CSI, and DIS, and move to the standard procedure.

The timer value in steps S14 and S19 described above is 1 for sending the CNG in ITU-T recommendation T30.
It is a 100 Hz tone signal, and is defined to be on for 0.5 seconds and off for 3 seconds, and the time tolerance value is ± 15%. Therefore, if two SNSSs are inserted in 3 seconds and the communication time of SNSS is about 0.7 seconds,
The timer value in steps S14 and S19 is about 0.8.
Seconds.

In this embodiment, one CNG is
Although it has been described that the SNSS is transmitted at two ratios, if steps S15 to S19 are repeated, S
Although there is an upper limit, the NSS transmission rate can be set freely. In that case, the timer value will be reduced. However, in the case of one SNSS per CNG,
The following problems occur. The called station identification signal CED is sent according to ITU-T Recommendation T30, and a tone of 2100 ± 15 Hz is sent for 2.6 to 4.0 seconds 1.8 to 2.5 seconds after being connected to the transmission line. Then it is stipulated. If CED is sent out 1.8 seconds after the line is connected,
If one SNSS is sent per CNG, the interval between the SNSS and the next SNSS exceeds 1.8 seconds, which may result in a case where the SNSS cannot be detected.

Further, although line connection is not detected in this embodiment, steps S15 to S17 and step S
It is also possible to detect a busy tone from the line 8 in the loop from 20 to step S22. In the case of busy tone detection, the other party is busy although not shown in FIG.

As described above, the facsimile communication method according to the embodiment of the present invention includes the facsimile communication including the control procedure for communicating the communication procedure signal by the low speed modem 5 and the control procedure for communicating the communication procedure signal by the high speed modem 6. In the method, after dialing of the calling side which is the transmitting side, the calling side repeatedly sends out the high speed procedure request signal SNSS by the low speed modem 5 without detecting the line connection, and the high speed procedure request signal S
The called party on the receiving side receiving the NSS receives the high-speed procedure request signal S
When the high-speed procedure response signal SNSF which is the response of the NSS is sent out by the low-speed modem 5, the subsequent control procedure is communicated by the high-speed modem 6, which corresponds to the embodiment of claim 1.

Therefore, the transmitting side transmits the SNSS after dialing, and the receiving side transmits the SNSF after receiving the SNSS to the transmitting side, whereby the control procedure thereafter can be communicated by a high speed signal. As a result, the control procedure time until the transmission of the document data is shortened, and the communication time of the control procedure is shortened. Further, since the CNG transmission pattern conforms to the standard, it can be applied to a facsimile machine with a facsimile / telephone automatic switching function.

In particular, when the present invention is carried out,
The SNSS shall be transmitted 75 ± 20 ms after CNG transmission. Also, after sending SNSS, the next C
Before sending NG, one or more SNSS shall be sent. Then, it is desirable to send the SNSS about 0.8 seconds after sending the SNSS.

<Embodiment 2> Next, the operation for determining the high speed, which is the main part of the second embodiment of the present invention, will be described with reference to FIGS.
It will be explained based on. In the figure, the same reference numerals and symbols as those of the first embodiment indicate the same or corresponding components as those of the first embodiment, and therefore, duplicated description will be omitted here.

FIG. 5 is an explanatory view showing an example of the data communication speed information in the SNSS of the facsimile apparatus of the second embodiment of the present invention, and FIG. 6 is an explanatory view showing an example of the data communication speed information in the SNSF.

The configuration and the basic operation of the transmitter and the receiver are the same as those of the first embodiment, and the description thereof will be omitted here.

First, the high speed procedure request signal SNS of this embodiment.
The S data communication speed information and the data communication speed designation / capability information will be described with reference to FIG. 5, and the high speed procedure response signal SNSF data communication execution speed information will be described with reference to FIG.

FIG. 5 shows an example of the data communication speed information in the SNSS. One octet forms part of the FIF (facsimile information field) of the SNSS. Bit 6 in FIG. 5 is data communication speed designation / capability information. If this bit is "1", bits 2-5
Means the specified data communication speed of the transmitter. Here, bits 2 to 5 comply with bits 11 to 14 of the DCS standard instruction of ITU-T Recommendation T30. If bit 6 in FIG. 5 is "0", then bits 2-5 indicate the data rate capability of the transmitter. Bits 2-5 in this case
Is bit 1 of the DIS standard instruction of ITU-T Recommendation T30
1 to 14 are followed.

That is, as shown in FIG. 5, the high speed procedure request signal SNSS of the low speed signal output from the transmitting side includes the data communication speed information and the data communication speed designation / capability information. Depending on the designation / capacity information, the meaning of the data communication speed information changes to the data communication designated speed or the calling terminal data communication speed capability. Further, the high speed of the high speed procedure is determined by the data communication execution speed information in the SNSF of the received low speed signal.

FIG. 6 shows an example of the data communication execution speed information in the high speed procedure request signal SNSF. This one octet is
It forms part of the FIF of the SNSF. Bit 2 of FIG.
5 is data communication execution speed information, which follows bits 11 to 14 of the DCS standard instruction of ITU-T Recommendation T30. That is, as shown in FIG. 6, the meaning of the data communication speed information is interpreted as the data communication specified speed or the calling terminal data communication speed capability based on the data communication speed designation / capability information in the SNSS from the transmitting side. Then, the maximum speed is set in the data communication execution speed information by comparing with the data communication capacity of the receiver or the data communication capacity in the memory of the receiver.
Send NSF.

Next, the high speed determining operation of this embodiment will be described with reference to the flow charts of FIGS.

FIG. 7 is a flowchart showing the high speed speed determining operation on the transmitting side of the facsimile apparatus according to the second embodiment of the present invention, and FIG. 8 is a flowchart showing the high speed speed determining operation on the receiving side.

First, the transmitter will be described with reference to FIG.

When the operator sets the transmission original on the reading unit 2 and inputs the transmission instruction key on the operation unit 1, the NCU 7 performs a dialing operation on the line 8.
After that, if the key operation by the operator or the instruction of the memory in the main control unit 3 is the speed designation in step S51, in step S52 the data communication speed designation in the SNSS /
Set the speed specification in the capability information. This is to set bit 1 to "1" in the example of FIG. In step S53, the data communication speed stored in the memory in the main control unit 3 is taken out, and the data communication designated speed information in the SNSS, that is,
Set bits 2 to 5 in FIG. 5, and set SNS in step S54.
Send S. If the speed is not designated in step S51, the process proceeds to step S58, and the capability is set in the data communication speed designation / capability information in the SNSS. That is, "0" is set in bit 6 of FIG. In step S59, the data communication capability speed stored in the memory in the main control unit 3 is extracted, and the data communication designated speed information in the SNSS, that is, in FIG.
Bits 2 to 5 are set, and SNSS is transmitted in step S54. In step S55, the SNSF is detected from the receiving side. When the SNSF is detected, step S56
In step S57, the data communication execution speed in the SNSF is extracted, and the process proceeds to the high speed procedure in step S57.

Next, the receiver will be described with reference to FIG.

The facsimile in the reception standby state connects the line when the NCU 7 detects an incoming call signal from the line 8. In step S61, the SN from the transmitting side
SS is detected, and when SNSS is detected, the process proceeds to step S62. If the data transfer speed designation / capability information in the SNSS is the speed designation, that is, if bit 6 in FIG. 5 is "1", the process proceeds to step S63. Here, the designated data communication speed in SNSS is taken out, this is compared with the data reception speed capability of the own station in step S64 to calculate the maximum value, and the maximum value is set in step S65 as the data communication execution speed in SNSF. Also, step S
In 62, if the data communication speed designation / capability information in the SNSS is capability, that is, bit 6 in FIG. 5 is “0”.
If it is, the process proceeds to step S68, the data communication speed capability value in SNSS is extracted, this is compared with the data receiving speed capability of the own station in step S69, the maximum value is calculated, and the data communication in SNSF is performed in step S65. Set as the execution speed. In step S66, the SNSF is sent to the transmitter based on the set value, and in step S67
Move to high speed procedure.

As described above, in this embodiment, the control procedure for communicating the communication procedure signal by the low speed modem 5 and the high speed modem 6 are used.
And a control procedure for communicating a communication procedure signal according to the above, wherein the calling side sends the high speed procedure request signal SNSS by the low speed modem 5, and the called side receiving the high speed procedure request signal SNSS is the response of the high speed procedure request signal SNSS. High speed procedure response signal S
In the facsimile communication method in which NSF is transmitted by the low-speed modem 5, subsequent control signals are communicated by the high-speed modem 6, as shown in bit 6 of FIG. It has data communication speed capability information of the calling terminal and corresponds to the embodiment of claim 2.

Therefore, the transmitting side sends out the high speed procedure request signal SNSS having the transmission right information, and the receiving side uses the data communication speed designation / capability information of the received SNSS to send the SNSS when the transmitter designates the data speed. The data communication designated speed information in the above is compared with the maximum data reception speed capability of the receiving side, the maximum speed is set as the high speed procedure response signal SNSF data communication execution speed information, and this is sent. Also, by the data communication speed designation / capability information of SNSS,
When the transmitter does not specify the data rate, it compares the data communication speed capability information in the SNSS with the maximum data reception speed capability of the receiving side, sets the maximum speed in the SNSF data communication execution speed information, and sets it. Send out.

That is, the calling side has an SNSS in which the data communication speed information and the data communication speed designation / capability information are stored in the SNSS
Is sent to the called party and the called party receiving the SNSS sends the SNS
Depending on the data communication speed specification / capability information in S, SNSS
The meaning of the internal data communication speed information is understood as the specified data communication speed or the data communication speed capability of the calling terminal, and the result of comparison with the data transfer speed capability of the called side is set in the SNSF internal data communication execution speed information and By transmitting to the caller, the rate of subsequent high speed data can be determined.
As a result, the speed of the pre-procedure can be increased, and the right to specify the data communication speed and the right to abandon the right can be provided to the transmitting side.

In particular, when implementing the present invention,
The information indicating that the data communication designated speed information is included in the SNSS is included in the SNSS. Have data communication execution speed information in SNSF. The maximum data communication speed is obtained by comparing the data communication specified speed of the caller specified by SNSS with the data communication speed capability of the called terminal or the data communication speed capability in the memory of the called terminal. Is transmitted as the data communication execution speed information in the SNSF. Also, the calling side uses a low-speed modem and a high-speed procedure request signal S
The called party that sent the NSS and received the SNSS is the SNSS
When a high-speed procedure response signal SNSF, which is a response to the above, is sent by a low-speed modem, the data communication speed capability information of the calling terminal should be included in the SNSS in the facsimile that communicates the subsequent control signals by the high-speed modem. Must have data rate capability information in the SNSS. Have data communication execution speed information in SNSF. The maximum data communication speed is obtained by comparing the data communication speed capability of the caller specified by SNSS with the data communication speed capability of the called terminal or the data communication speed capability in the memory of the called terminal. Is transmitted as the data communication execution speed information in the SNSF. Then, the subsequent control signals are communicated at the speed indicated by the data communication execution speed information in the SNSF. In the phase B control procedure, the non-standard function signal NSF, the called terminal identification signal CSI, and the digital identification signal DIS, which are the initial identification signals of the called side, communicate at the slowest speed that can be used by the high speed modem 6, and other control is performed. Signals should communicate at the same speed as data communication. Further, the data communication designated speed information in the SNSS and the calling terminal data communication speed capability information in the SNSS are the same data communication speed information, and the information indicating that the SNSS has the data communication specified speed information and the SNSS Information indicating that the data communication speed capability information is included is 1
It is preferable that the data communication speed designation / capacity be one, and the meaning of the data communication speed information is understood as the data communication designated speed or the calling terminal data communication speed capability based on the data communication speed designation / capability information. . Further, in the above embodiment, the data communication execution speed information is transmitted in the SNSF, but in particular, the non-standard function signal NSF, the called terminal identification signal CSI and the digital identification signal DIS are transmitted at the slowest speed that can be used by the high speed modem 6. When performing the above, the data communication execution speed information is set to the non-standard function signal NSF.
Can be kept inside.

<Embodiment 3> Next, the operation for determining the high speed, which is the main part of the third embodiment of the present invention, will be described with reference to FIGS. 2 and 9 to 1.
It will be described based on 4.

FIG. 9 is an explanatory view showing an example of the TCF, TSI, and NSS formats of the facsimile apparatus of the third embodiment of the present invention, FIG. 10 is an explanatory view showing an example of the TCFB format used in FIG. 9, and FIG. Is the T used in FIG.
FIG. 12 is an explanatory diagram showing an example of the CFF format, and FIG. 12 is an explanatory diagram showing an example of the TCF, TSI, and NSS check periods.

In FIG. 9, FLAG0 is a T for checking.
It is a continuous signal of the HDLC flag until entering the CF. This is the interval until the high speed signal stabilizes.
TCFB is a training check signal TCF, which means a collection of TCF frames of a certain unit, that is, a TCF block, as shown in FIG. TSI is a transmission terminal identification signal and indicates information such as the telephone number of the transmission station. NSS1 and NSS2 are non-standard function setting signals, which are divided into two in the case of FIG. FLAG
2 is a continuous signal of the end HDLC flag. Where F
Since LAG0 and FLAG2 have the same total time at any speed, the number of bytes of the flag is changed depending on the speed.

In FIG. 10, the TCF block is composed of a plurality of TCFFs, and the total time is the same at any speed. Where TCFF is TCF
It is the basic unit of and has the configuration shown in FIG. Here, the time of one TCFF is constant, so
The number of TCFFs in one TCF block is constant.

FIG. 11 shows a form of a known HDLC frame. In FIG. 11, ADDR is an address field for identifying a specific station. CNTL
Is a control field and has a function of encoding commands and responses unique to the facsimile control procedure. FCF is a facsimile control field for identifying a facsimile signal. In the case of a TCF frame, a value other than the existing FCF is set. The FIF is a facsimile information field, and stores auxiliary information such as parameters attached to the signal indicated by the FCF. FC
S is a frame check sequence, and the ADDR
It is for checking whether the signals from to FIF are correct. Here, since the TCF frame has a fixed time at any speed, the number of octets of the FIF is changed depending on the speed.

In FIG. 12, since the high-speed signal is unstable immediately after the start of the signal, it should not be a target for checking. Therefore, it is desirable that the training check is not performed after the signal energy is detected, but after a certain amount of time has elapsed. This elapsed time is called the TCF check interval. The check is ended when it is found that the expected frame can be received and no expected frame comes after that. In the case of FIG. 12, it is assumed that the expected frame does not come after NSS2.

Below, the TCF transmission / main part of the present invention will be described.
The check operation will be described with reference to the flowcharts of FIGS.

FIG. 13 is a flow chart showing the TCF sending operation of the transmitting side of the facsimile apparatus of the third embodiment of the present invention, and FIG. 14 shows the TCF check operation of the receiving side of the facsimile apparatus of the third embodiment of the present invention. It is a flowchart.

First, the transmitter will be described with reference to FIG.

When the operator sets the transmission original on the reading unit 2 and inputs the transmission instruction key on the operation unit 1, the NCU 7 performs a dialing operation on the line 8 and sends out SNSS. When the response SNSF is detected and NSF, CSI, and DIS are further received, the process proceeds to step S71. Here, the high speed modem 6 is set to the high speed modem speed determined by the SNSF, and the TCF is transmitted in step S72. The format complies with FIGS. 10 and 11 as described above. Next step S
At 73, the TSI specified by the ITU-T recommendation is transmitted. However, TSI does not necessarily have to be transmitted. In step S74, NSS is transmitted. When the NSS data has been transmitted, an end flag is transmitted in step S75 and then the transmission is terminated.

Next, the receiver will be described with reference to FIG.

The facsimile machine in the reception standby state
When the NCU 7 detects an incoming call signal from the line 8, the line is connected. If SNSS is detected, SNSF
To the transmitter at a low speed and then at a high speed, eg 2400
When NSF, CSI, and DIS are transmitted by BPS, the process proceeds to step S81. Here, the high speed modem 6 is set to the data communication execution speed determined by the SNSF, and is set in the reception standby state. In step S82, the high-speed signal detection RTS is turned on.
When the RST on is detected, the TCF check interval is set in step S83, the process proceeds to step S84, and the check is started from here. First, it waits for a frame to be received. FC is added to the received frame in step S85.
S Check for errors. If there is no error, if the frame received in step S86 is TCFF, the process returns to step S84. If not TCFF, step S87.
It is checked whether the frame received at is TSI. T
If SI, after fetching data, the process returns to step S84.
If it is not TSI, the process proceeds to step S88. NS here
Check if S. If it is NSS, there are no more expected frames, so the check is ended and the process waits until the signal disappears in step S89. When no signal is received, the CFR is sent out in step S90, and thereafter the data waits. If it is not NSS in step S88, the process returns to step S84. Finally, step S85
If it is an FCS error in, it is considered to be a TCF error and the subsequent signals are not checked. Step S9
In step 1, the signal disappears, the FTT is transmitted in step S92, and the subsequent operation is performed.

In this embodiment, one FCS error causes TC
Although the F check is performed, a plurality of FCS errors may be used instead of one FCS error.

As described above, the facsimile communication method of the present embodiment is the facsimile communication method including the control procedure for communicating the communication procedure signal by the low speed modem 5 and the control procedure for communicating the communication procedure signal by the high speed modem 6. ,
Means for converting the training check signal TCF into an HDLC frame, means for communicating the transmission terminal identification signal TSI, and the non-standard function setting signal NSS with a high-speed signal, training check signal TCF, transmission terminal identification signal TSI, and non-standard function setting signal NSS And a means for checking a line error, which corresponds to the embodiment of claim 3.

Therefore, the training check signal T
Means for making CF an HDLC frame, means for communicating a transmitting terminal identification signal TSI, non-standard function setting signal NSS with a high-speed signal, and means for making TCF, transmitting terminal identification signal TSI, non-standard function setting signal NSS multi-frame By providing a means for checking the line error and a line error, it is possible to perform a rational training check and reduce the software load on the main controller.

Especially when the present invention is carried out,
To communicate the training check signal TCF as an HDLC frame in a facsimile device having a non-standard function. Alternatively, in a facsimile machine having a non-standard function, the training check signal TCF is set to HDL.
Communicate as a continuous signal of the C flag. The sending time of the training check signal TCF is constant. Frame check sequence FC for line check
Perform error check by S error. The training check signal TCF is converted into a multi-frame, and multiple T
One training check signal T by CF frame
Configure CF. The sending time of one TCF frame is constant. Do not start the line check until a certain time after the carrier signal is input. T
Multi-frame CF, TSI, NSS in this order,
Communicate with high speed signals. It is preferable to perform the line check in all frames of TCF, TSI, and NSS.

The above embodiment has been described on the assumption that the transmission time of one TCF frame is constant.
It is not necessary for practicing the invention.

<Fourth Embodiment> Next, the communication procedure determining operation which is the main part of the fourth embodiment of the present invention will be described with reference to FIGS. 2 and 15 to 1.
It will be described based on 8.

FIG. 15 is a flow chart showing the communication procedure determining operation before transmission of the facsimile apparatus of the fourth embodiment of the present invention, and FIG. 16 is a flow chart showing the control operation similarly after transmission. Also, FIG. 17 is a memory configuration diagram of the auto dial, and FIG. 18 is a information storage diagram of each auto dial.

First, the standard procedure / high-speed procedure selecting operation, which is the main part of the embodiment of the present invention, will be described with reference to the flowcharts of FIGS. 15 and 16 and the configuration diagrams of FIGS. 17 and 18.

First, before transmission will be described with reference to FIG.

When the operator sets the transmission original on the reading unit 2 and inputs the transmission instruction key on the operation unit 1, the destination input on the operation unit 1 is the auto dial, that is, the one-touch dial in step S101. Alternatively, if it is not a speed dial, the process proceeds to step S106, and communication is performed according to the standard procedure.

In the case of the auto dial in step S101, the auto dial has a structure as shown in FIG. 17, and the contents of each memory have the structure shown in FIG. If the destination is input by the auto dial, the process proceeds to step S102, and the success number in the memory of the input auto dial is divided by the communication number and multiplied by 100 to calculate the success rate up to the present. In the example of FIG. 18, the number of communications is 100 and the number of successes is 80, so the success rate X is 80%. In step S103, the predetermined success rate stored in the memory of the main control unit 3 is set to Y. The predetermined success rate Y may depend on the device, but the operation unit 1
Therefore, the operator may freely set it.
If the success rate X up to now is greater than or equal to the predetermined success rate Y in step S104, step S10
Move to 5 and move to high speed procedure. If the success rate X up to now is smaller than the predetermined success rate Y, step S10.
6. The standard procedure is followed by 6. Therefore, when the predetermined success rate Y is 80%, the success rate X up to the present time and the predetermined success rate Y are equal to each other, so that the communication is performed in the high speed procedure. When the number of communication lines is 0 after setting auto dial, etc., the standard procedure is performed.

Next, the operation after the transmission will be described with reference to FIG.

After the transmission is completed, if the communication is not a call by the auto dial, this routine is finished. In the case of auto dial, the number of times of communication of the called auto dial is incremented in step S112. If there is a communication error in step S113, this routine is ended, and if there is no error, the success count is incremented in step S114, and this routine is ended. In the example of FIG. 18, when a communication error occurs, the number of communications: 101, the number of successes: 80, the success rate is 79.2%, and the predetermined success rate Y
For the next communication with 80%, the standard procedure is selected. If there is no error, the number of communications is 101, the number of successes is 81, the success rate is 80.2%, and the predetermined success rate Y
Therefore, a fast procedure is selected for the next communication.

This flowchart operates not only after the high speed procedure but also after the standard procedure is completed. That is, the communication count is incremented every time communication is performed regardless of the procedure, and the success count is also incremented in the case of normal communication regardless of the procedure.

Although the present embodiment has been described by using the configuration in which the communication success rate Y is obtained by auto dialing, the other party's calling number other than that is compared with the number stored in the memory to judge whether or not they match. There is also a method. In other words, it makes it possible to search the attribute etc. by telephone number in the telephone book format,
Whether using auto dialing or entering with the numeric keypad, you can search information by phone number in the phone book,
It is also possible to obtain the communication success rate. Also, the fact that the other terminal has been changed to a terminal that does not have a high-speed procedure
When it is found from the manufacturer code in F or the function bit in NSF, the communication mode in FIG. 18 is set to “0” for the standard procedure, the number of times of communication, and the number of successes.

As described above, the facsimile communication method of this embodiment is a facsimile communication method including a control procedure for communicating a communication procedure signal by the low-speed modem 5 and a control procedure for communicating a communication procedure signal by the high-speed modem 6. ,
Corresponding to the information of the telephone number of the other party, information regarding the communication function of the other party and the communication result are stored in the storage means built in the main control unit 3, and the success rate of communication with the other party in the past and a predetermined success rate. When the past communication success rate is high, the communication procedure by the high speed modem 6 is used, and when it is low, the communication procedure by the low speed modem 5 is performed, which corresponds to the embodiment of claim 4.

Therefore, the transmitting side stores the information about the communication function of the other party in correspondence with the information of the telephone number of the other party and the communication result, and the standard procedure is performed according to the past success rate of communication with the other party. Alternatively, it is possible to determine a communication procedure that is a high-speed procedure, keep the communication success rate of all the communication from the past to the present above a certain value, and select the standard procedure and the high-speed procedure based on the past success rate. .

[0104]

According to the facsimile communication method of the first aspect, the transmitting side transmits the SNSS after dialing and the receiving side transmits the SNSS.
By transmitting the SNSF to the transmitting side after receiving the SS, the control procedure after that can be communicated by a high-speed signal.
As a result, the communication time of the control procedure is shortened. Also, C
Since the NG signal transmission pattern conforms to the standard, compatibility with a facsimile with a facsimile / telephone automatic switching function is good.

According to the second aspect of the facsimile communication method, the calling side transmits the SNSS having the data communication speed information and the data communication speed designation information or the data communication capability information in the SNSS to the called side, and the SNSS receives the SNSS. Calling party is SNSS
The meaning of the data communication speed information in the SNSS is understood as the specified data communication speed or the data communication speed capacity of the calling terminal based on the data communication speed specification information or the data communication capacity information in the SNSS, and the data transfer speed capacity of the called side is compared. The result
By setting the data communication execution speed information in the SNSF and transmitting it to the calling side, the calling side has the right to specify the data communication speed, and the speed of the subsequent high speed data can be determined.

According to a third aspect of the present invention, the facsimile communication method comprises means for converting the training check signal TCF into an HDLC frame, means for communicating the transmission terminal identification signal TSI and the non-standard function setting signal NSS with a high speed signal, and a training check signal TCF, By providing a means for converting the transmission terminal identification signal TSI and the non-standard function setting signal NSS into multiple frames and a means for checking a line error, a reasonable training check can be performed and the software load on the main control unit can be reduced. You can

According to another aspect of the facsimile communication method of the present invention, the transmitting side stores the information about the communication function of the other party and the communication result in correspondence with the information of the telephone number of the other party.
Depending on the past communication success rate with the other party, the communication procedure of the standard procedure or the high-speed procedure can be determined, and the communication success rate of all the communication from the past to the present can be kept above a certain value.

[Brief description of drawings]

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

FIG. 2 is a signal sequence diagram showing an example of a communication procedure in the facsimile apparatus of the first embodiment of the present invention.

FIG. 3 is a flowchart showing a high speed pre-procedure operation on the transmitting side of the facsimile apparatus according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing a high-speed pre-procedure operation on the receiving side of the facsimile apparatus according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram showing an example of data communication speed information in SNSS of the facsimile apparatus according to the second embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an example of data communication speed information in the SNSF of the facsimile apparatus according to the second embodiment of the present invention.

FIG. 7 is a flowchart showing a high speed speed determining operation on the transmitting side of the facsimile apparatus according to the second embodiment of the present invention.

FIG. 8 is a flow chart showing a high speed speed determining operation on the receiving side of the facsimile apparatus according to the second embodiment of the present invention.

FIG. 9 is an explanatory diagram showing an example of TCF, TSI, and NSS formats of a facsimile apparatus according to a third embodiment of the present invention.

FIG. 10 is an explanatory diagram showing an example of the TCFB format of the facsimile apparatus according to the third embodiment of the present invention.

FIG. 11 is an explanatory diagram showing an example of a TCFF format of the facsimile apparatus according to the third embodiment of the present invention.

FIG. 12 is an explanatory diagram showing an example of TCF, TSI, and NSS check periods of the facsimile apparatus of the third embodiment of the present invention.

FIG. 13 is a flowchart showing the TCF sending operation on the sending side of the facsimile apparatus according to the third embodiment of the present invention.

FIG. 14 is a flowchart showing a TCF check operation on the receiving side of the facsimile apparatus according to the third embodiment of the present invention.

FIG. 15 is a flowchart showing a communication procedure determining operation before transmission of the facsimile apparatus of the fourth exemplary embodiment of the present invention.

FIG. 16 is a flow chart showing the control operation after transmission of the facsimile apparatus of the fourth embodiment of the present invention.

FIG. 17 is a memory block diagram of an auto dial of a facsimile apparatus according to a fourth embodiment of the present invention.

FIG. 18 is an information storage diagram of each auto dial of the facsimile apparatus of the fourth embodiment of the present invention.

FIG. 19 is a signal sequence diagram showing an example of a communication procedure in a G3 standard facsimile apparatus.

[Explanation of symbols]

 1 Operation part 2 Reading part 3 Main control part 4 Recording part 5 Low speed modem 6 High speed modem 7 NCU 8 line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Haruo Takada Inventor Haruo, Moriguchi, Osaka 2-18 Keisan Hondori Sanyo Electric Co., Ltd. Electric Co., Ltd.

Claims (4)

[Claims] 1. A facsimile communication method comprising a control procedure for communicating a communication procedure signal by a low-speed modem and a control procedure for communicating a communication procedure signal by a high-speed modem, wherein the calling side is dialed after the calling side. The low-speed modem repeatedly sends the high-speed procedure request signal SNSS without detecting the line connection, and the called party receiving the high-speed procedure request signal SNSS sends the high-speed procedure response signal SNSF, which is the response of the high-speed procedure request signal SNSS, to the low-speed modem. A facsimile communication method characterized in that the following control procedure is communicated by a high-speed modem when it comes. 2. A control procedure for communicating a communication procedure signal by a low speed modem and a control procedure for communicating a communication procedure signal by a high speed modem, wherein the calling side sends a high speed procedure request signal SNSS by the low speed modem, Procedure request signal SNSS
In the facsimile communication method of communicating the following control signals by the high speed modem when the called side receives the high speed procedure response signal SNSF which is the response of the high speed procedure request signal SNSS A facsimile communication method characterized in that the specified data communication speed or the data communication speed capability information of the calling terminal is included in. 3. A facsimile communication method comprising a control procedure for communicating a communication procedure signal by a low speed modem and a control procedure for communicating a communication procedure signal by a high speed modem, and means for converting the training check signal TCF into an HDLC frame. A means for communicating a transmission terminal identification signal TSI and a non-standard function setting signal NSS with a high-speed signal, a training check signal TCF, a transmission terminal identification signal T
A facsimile communication method comprising means for converting the SI and non-standard function setting signal NSS into multiple frames, and means for checking a line error. 4. A facsimile communication method comprising a control procedure for communicating a communication procedure signal by a low-speed modem and a control procedure for communicating a communication procedure signal by a high-speed modem, and the other party corresponding to the information of the telephone number of the other party. The information about the communication function of the destination and the communication result are stored in the storage means, the success rate of communication with the destination in the past is compared with a predetermined success rate, and when the success rate of the past communication is high, the communication procedure by the high speed modem is performed. A facsimile machine characterized by being used and performing a communication procedure using a low-speed modem when it is low.