JPH07177331A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To improve the probability of V.fast communication and to attain the high speed communication of much data by providing this facsimile equipment with a V.fast communication priority selecting means, and when V.fast communication is given priority, extending the sending time of a called station identification signal. CONSTITUTION:The energy component of V.21 is checked during the sending of a V.22 low band carrier signal at the time of calling, and at the time of detecting the energy component, the sending of the V.22 low band carrier signal is interrupted and operation may be immediately shifted to the reception of a V.21 signal. The facsimile equipment has the V.fast communication priority selecting means, and when V.fast communication is prior, either one of following modes may be allowed to correspond. One of them is a mode for extending the sending time of a called station identification signal. The other is a mode for resending the called station identification signal only by the prescribed number of times. Either one of the two modes is selected by registering a circuit 44 and the priority of V.fast communication is displayed on a circuit 36. Consequently communication with conventional G3 and ECM can also be attained and the sending condition of an LED signal can also be changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to A facsimile machine having a fast function.

[0002]

2. Description of the Related Art Conventionally, V.I. The protocol of the fast function has not been officially decided. Currently, V. I am trying to decide a protocol between communications that has a fast function. As an example of this, V.I. The fast function protocol considers full-duplex communication, and therefore the protocol is also full-duplex. When the calling side detects the CED signal, 22 starts transmitting the low-band carrier signal, and the V.22 signal from the called side is transmitted. 22 when the high band train signal is detected. The transmission of the low band train signal of 22 is started. Also, the called party is CE
Sending D signal 22 when the low band carrier signal of V.22 is detected. The transmission of the high band train signal of 22 is started.

[0003]

However, the above-mentioned conventional example has a problem that the communication with the conventional G3ECM machine is not taken into consideration.

[0004]

According to the present invention, V. f
In a facsimile machine having an ast function, V.V. 22 low-band carrier signals are transmitted, but V.V. 22 cannot detect the high band train signal of V.22. The transmission of the carrier signal of the low band of No. 22 is interrupted, and V.22 is stopped. After shifting to signal reception of No. 21, it became possible to perform communication in G3 or ECM based on CCITT Recommendations T4 and T30.

Further, when a call is received, the V.V. When the low band carrier signal of V.22 is detected, V.22 is detected. 22 even after the high band train signal has been transmitted and the called station identification signal has been transmitted for a predetermined time. Two
2 when the low band carrier signal cannot be detected. Two
It has become possible to transmit the signal No. 1 and perform communication in G3 or ECM based on CCITT Recommendations T4 and T30.

In the above, V. fast communication priority selection means, When the fast communication is prioritized, the sending time of the called station identification signal is lengthened, or
It has become possible to retransmit the called station identification signal only a predetermined number of times.

As a result, V. In addition to fast communication, communication with conventional G3 and ECM is now possible. further,
V. It is also possible to change the CED sending conditions by giving priority to fast communication, which is
V. This has the effect of increasing the probability of communication in fast and increasing high-speed communication.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings.

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

In FIG. 1, numeral 2 denotes a telephone network used for data communication and the like. Therefore, the telephone network is connected to a terminal of the line to control connection of the telephone exchange network, switch to a data communication path, and loop. Network control unit NCU (Net
work control unit). Signal line 2
a is a telephone line. The NCU 2 inputs the signal on the signal line 46, and if the signal level is “φ”, connects the telephone line to the telephone side, that is, the signal line 2a to the signal line 2b. If the signal level of the signal line 46a is "1" and the signal level is "1", the telephone line is
That is, the signal line 2a is connected to the signal line 2c. In a normal state, the telephone line is connected to the telephone side.

Reference numeral 4 is a telephone.

Reference numeral 6 is a hybrid circuit for separating a transmission system signal and a reception system signal. That is, the signal line 22a
The transmission signal of passes through the signal line 2c and the NCU2,
It is sent to the telephone line. Further, the signal sent from the other party is output to the signal line 6a after passing through the NCU 2 and then the signal line 2c.

Numeral 8 is CCITT Recommendation V.6. 22 is a modulator / demodulator that performs modulation / demodulation based on 22. V. When the 22 modulator / demodulator outputs a signal of signal level "1" to the signal line 46b,
When the low band carrier signal is sent to the signal line 8a and the signal of the signal level "1" is outputted to the signal line 46c, the high band carrier signal is sent to the signal line 8a and the signal line 46 is sent.
The information of d is input, the low band data is transmitted to the signal line 8a, the information of the signal line 46e is input, and the high band data is transmitted to the signal line 8a. On the other hand, the modem is a full-duplex modem, and when the information on the signal line 6a is input and a low band carrier signal is detected, a signal of signal level "1" is output to the signal line 8b and a high band carrier signal is output. Upon detection, a signal of signal level “1” is output to the signal line 8c, when low band data is received, the received data is output to the signal line 8d, and when high band data is received, the received data is output to the signal line 8e. .

Numeral 10 is CCITT Recommendation V.10. It is a modulator / demodulator that performs modulation / demodulation based on fast. V. The fast modulator / demodulator inputs the signal output to the signal line 16a when the signal of the signal level "φ" is output to the signal line 46f, performs modulation, and outputs the modulated data to the signal line 10a.
In addition, V. The fast modulator / demodulator inputs the information of the signal line 6a, demodulates it, and outputs the demodulated data to the signal line 10b.

Numeral 12 is a known CCITT recommendation V. 21 is a modulator that performs modulation based on 21. The modulator 12 receives the procedure signal on the signal line 46g, performs modulation, and outputs modulated data to the signal line 12a.

Reference numeral 14 denotes a reading circuit, which is used to read the transmission original.
Image signals for one line in the scanning direction are sequentially read, and black and white 2
Create a signal string that represents a value. CCD (charge coupled device)
And the like, and an optical system. The black and white binarized signal train is output to the signal line 14a.

Reference numeral 16 inputs the read data output to the signal line 14a and outputs encoded data (MH (Modified Huffman) encoding or MR (Modified Read) encoding) to the signal line 16a. .

Reference numeral 18 is a known CCITT recommendation V. 27t
er (differential phase modulation) or V. 29 (quadrature modulation)
Alternatively, V. 17 is a modulator that performs modulation based on 17.
The modulator 18 inputs the signal of the signal line 16a while the signal of the signal level "1" is being output to the signal line 46f, performs modulation, and outputs the modulated data to the signal line 18a.

When a signal transmission pulse is generated on the signal line 46i, 20 transmits a tonal signal of 2100HZ to the signal line 20a for the number of seconds output to the signal line 46h. To generate 21
00HZ signal transmission circuit.

Reference numeral 22 is an adder circuit for inputting the signals of the signal line 8a, the signal line 10a, the signal line 12a, the signal line 18a and the signal line 20a, and outputting the addition result to the signal line 22a.

Reference numeral 24 is a known CCITT recommendation V.34. 21 is a demodulator that performs demodulation based on 21. The demodulator 24 inputs the signal of the signal line 6a and outputs the V. 21 demodulation is performed, and the demodulated data is output to the signal line 24a.

Reference numeral 26 is a CED signal detection circuit,
When the signal of 00HZ is detected, the signal of the signal level “1” is output to the signal line 26a, and when the signal of 2100HZ is not detected, the signal of the signal level “φ” is output to the signal line 26a. .

28 is a known CCITT recommendation V.28. 27t
er (differential phase modulation) or V. 29 (quadrature modulation)
Alternatively, V. 17 is a demodulator that performs demodulation based on 17.
The demodulator 28 receives the signal on the signal line 6a, demodulates it, and outputs the demodulated data to the signal line 28a.

Reference numeral 30 denotes a signal level "φ" on the signal line 46j.
The signal output to the signal line 10b is input when the signal of No. is output, and the signal output to the signal line 28a is input when the signal of the signal level "1" is output to the signal line 46j. Then, the decoding circuit outputs the decoded data (MH (Modified Huffman) decoding or MR (Modified Read) decoding) to the signal line 30a.

Reference numeral 32 is a recording circuit for inputting the data output to the signal line 30a and sequentially recording one line at a time.

34 is a V. This button is used when giving priority to fast communication, and when the button is pressed, a pressing pulse is generated on the signal line 34a.

36 is a V. This is a fast communication priority display circuit, which turns off the display when a clear pulse occurs on the signal line 46k, and repeats lighting-off-lighting-on every time a pressing pulse is generated on the signal line 34a. 36 outputs a signal of signal level "1" to the signal line 36a when the display is turned on, and when the display is turned off,
The signal of the signal level "φ" is output to the signal line 36a.

38 is V. This is a registration button used when registering the mode in the fast communication priority, and when the button is pressed, a pressing pulse is generated on the signal line 38a.

Reference numeral 40 is a ten-key pad, and the information of the pressed ten-key pad is output to the signal line 40a.

Reference numeral 42 denotes a set key. When the set key is pressed, a pressing pulse is generated on the signal line 42a.

44 is a V. This is a fast priority mode registration circuit, and in this embodiment, the V. When fast communication has priority, 4.
5 seconds mode (which stores the signal “φ”) and 3 seconds CED signal that waits for 0.5 seconds and is retransmitted (for example, twice) (this is the signal “1”). Remember two modes. When registering in the circuit 44, a signal "φ" or a signal "1" is output to the signal line 44a, and then a write pulse is generated on the signal line 46l. When reading the information registered in the circuit 44, a read pulse is generated on the signal line 46m. Then, the registered information is output to the signal line 44a.

46 is a V. In a facsimile machine having a fast function, V.V. 22 low-band carrier signals are transmitted, but V.V. 22 cannot detect the high band train signal of V.22. The transmission of the carrier signal of the low band of No. 22 is interrupted, and V.22 is stopped. 21 signal reception, CCIT
Communication by G3 or ECM based on T recommendation T4, T30 is performed. Also, when receiving a call, the V.V. When the low band carrier signal of V.22 is detected, V.22 is detected. 22 even after the high band train signal has been transmitted and the called station identification signal has been transmitted for a predetermined time. Two
2 when the low band carrier signal cannot be detected. Two
It is a control circuit that mainly performs control to transmit the signal 1 and perform communication in G3 or ECM based on CCITT Recommendations T4 and T30.

In FIG. 2, step S50 represents the beginning.

In step S52, the signal line 46k
A clear pulse to V. fast priority display circuit 3
The display of 6 is turned off.

In step S54, the signal line 46a
Then, the signal of the signal level “φ” is output to turn off the CML.

In step S56, the signal line 46
b, 46c, the signal of the signal level “φ” is output, and V.
The 22 modulator / demodulator 8 is set so that low-band and high-band carrier signals are not transmitted. In addition, V. The 22 modulator / demodulator 8 does not transmit low band data or high band data.

In step S58, the signal line 46h
Output 3.0 seconds to 2100HZ signal transmission circuit 3
Set to seconds.

In step S60, the signal line 46
The signal of the signal level “φ” is output to the f.
Set to use the fast modem.

In step S62, it is determined whether or not a call is selected. If a call is selected, the process proceeds to step S68. If no call is selected, a step S62 is performed.
Proceed to 64.

In step S64, it is determined whether or not the incoming call is selected. If the incoming call is selected, the process proceeds to step S108. If the incoming call is not selected, the step S64 is performed.
Proceed to 66.

Step S66 represents other processing.

In step S68, the signal line 46a
The signal of the signal level "1" is output to and the CML is turned on.

In step S70, the timer T1
Set to 35 seconds.

In step S72, the transmission of the CNG signal (1100HZ 0.5 second signal) is started.

In step S74, the signal line 26a
Signal is input to detect the CED signal. Specifically, it is determined whether the 2100HZ signal is connected and detected for 0.5 seconds. If the CED signal is detected, step S8 is performed.
If no CED signal is detected in step 6, step S
Proceed to 76.

In step S76, it is determined whether the transmission of the CNG signal is completed, that is, whether 0.5 seconds has elapsed, and if the transmission of the CNG signal is completed, step S76 is performed.
Proceeding to 78, if the transmission of the CNG signal has not ended, the processing proceeds to step S74.

In step S78, the timer T2
Set to 3 seconds.

In step S80, step S7
Similarly, it is judged whether or not the CED signal is detected, and the CED is detected.
If a signal is detected, the process proceeds to step S86 and the CED
When the signal is detected, the process proceeds to step S82.

In step S82, the timer T2
Timer T2
If the timer T2 has timed out, the process proceeds to step S84. If the timer T2 has not timed out, step S80.
Proceed to.

In step S84, the timer T1
Timer T1
If the timer T1 has timed out, the process proceeds to step S54. If the timer T1 has not timed out, step S72.
Proceed to.

In step S86, the timer T3
Set to 5 seconds.

In step S88, the signal line 46b
The signal of the signal level “1” is output to V. 22 low band carrier signals are transmitted.

In step S90 (FIG. 3), V.
It is judged whether the high band train signal of V.22 is detected or not. When the high band train signal of V.22 is detected, the process proceeds to step S92 and V.22. If the high band train signal of 22 is not detected, the process proceeds to step S98.

In step S92, the signal line 46b
The signal of the signal level “φ” is output to V. Stop sending 22 low band carrier signals.

In step S94, the V. Twenty-two low-band train signals are transmitted.

In step S96, the V. It indicates that transmission is performed based on fast.

In step S98, the timer T3
Timer T3
When the timer T3 is over, the process proceeds to step S100, and when the timer T3 is not over, the process proceeds to step S9.
Go to 0.

In step S100, the signal line 46
The signal of the signal level "φ" is output to b, and the low band carrier signal of V22 is stopped.

In step S102, the signal line 24
a signal is input, and V. 21 NSF / CSI / DIS
It is determined whether or not a signal is detected, and the V. 21 NSF /
When the CSI / DIS signal is detected, the process proceeds to step S105, and the V. If the 21a NSF / CSI / DIS signal is not detected, the process proceeds to step S104.

In step S104, the timer T
It is judged whether or not 1 has timed out, and the timer T
If 1 has timed out, the process proceeds to step S54, and if timer T1 has not timed out, step S1
Go to 02.

In step S105, the signal line 46
The signal of the signal level “1” is output to the f.
27 ter, V.I. 29, V.I. 17 Set to use a modem.

After step S106, the V. 27te
r, V. 29, V.I. It indicates that the transmission based on 17 is performed.

In step S108, the signal line 46
The signal of the signal line “1” is output to a and the CML is turned on.

In step S110, the timer T
Set 1 to 35 seconds.

In step S114, the signal line 46
A transmission start pulse is generated at i and transmission of the CED signal is started. The sending time is the number of seconds output to the signal line 46h.

In step S116, the signal line 8b
Input the signal of V. It is determined whether the low band carrier signal of No. 22 is detected, and V.22 is detected. When the low band carrier signal of No. 22 is detected, the process proceeds to step S117, and the V.
If the 22 low-band carrier signal is not detected, the process proceeds to step S122.

In step S117, the transmission of the CED signal is interrupted.

In step S118, the V. 22 high band train signals are transmitted.

After step S120, the V. fast
It indicates that the reception is performed based on.

At step S122, whether or not the transmission of the CED signal is completed, that is, the CE is sent to the signal line 20b.
It is judged whether or not the D signal transmission end pulse is generated, and C
When the transmission of the ED signal is completed, the process proceeds to step S124, and when the transmission of the CED signal is not completed, the process proceeds to step S124.
Proceed to 116.

In step S124, a 75 ^ms wait is performed.

The step S126 is the signal line 46g, 12
via V.a. It represents transmitting 21 NSF / CSI / DIS signals.

In step S127, the signal line 46
The signal of the signal level “1” is output to the f.
27 ter, V.I. 29, V.I. 17 Set to use a modem.

After step S128, the V. 27te
r, V. 29, V.I. It indicates that the transmission based on 17 is performed.

(Embodiment 2) V. 22 while transmitting the low band carrier signal. 21. When the energy component of 21 is checked and the energy component is detected, V.21. 22
The transmission of the low band carrier signal of V. 21 may be received.

(Embodiment 3) In addition to the above embodiment, V. fast communication priority selection means, fas
When t communication is prioritized, one of the following modes may be supported. One is to lengthen the sending time of the called station identification signal. Second, the called station identification signal is retransmitted only a predetermined number of times. Circuit 4 is used to select between the two modes.
4 and register V.4. The priority of the fast communication depends on the display of the circuit 36.

A concrete example of the above control is shown in FIG. 4, which is a different control flow chart from the control flow chart of FIG.

In FIG. 4, step S130 represents step S66 of FIG.

In step S132, the signal line 38
a, 40a, 42a, and the V. It is determined whether or not the registration of the fast communication priority mode is selected. If the registration is selected, the process proceeds to step S134 and the V. fas
The priority mode of t communication is registered in the registration circuit 44, and V.t. f
If the registration of the ast communication priority mode is not selected, the process proceeds to step S136 (step S54 in FIG. 2).

Step S138 is the same as step S1 in FIG.
10 is represented.

In step S140, the signal line 30
a. Enter the information of a. It is determined whether or not the priority of the fast communication is selected, and if selected, the process proceeds to step S144, and if not selected, the step S142.
Proceed to.

Step S142 corresponds to step S1 in FIG.
14 is represented.

In step S144, the information of the circuit 44 is input and the V.V. It is determined whether or not the mode for increasing the CED signal transmission time is selected as the priority of the fast communication. If the mode for increasing the CED signal transmission time is selected, the process proceeds to step S146, and the CED signal is transmitted twice. If the mode to be selected is selected, step S1
Go to 50.

In step S146, the signal line 46
4.5 h is output to h, and the 2100 HZ signal sending circuit is set to 4.5 seconds.

Step S148 corresponds to step S1 in FIG.
14 is represented.

Step S150 corresponds to step S1 in FIG.
14 represents step S122, and step S122
If Yes at 122, the process proceeds to step S152.

In step S152, 150 ms is required to enable the echo subdresser once.
Wait for. Then, the process again proceeds to step S154 (FIG. 2, step S114), and the CED signal is retransmitted.

For example, assuming that the CED signal is 3 seconds, the delay by the international line is 1.2 seconds, and the CED detection time is 1 second, Marsin has only 0.8 seconds and the echo sub dresser works. However, when the head of the signal is deviated, the called side transmits from the calling side within 3 seconds. V. 22 cannot detect the low band carrier signal, and Fast communication may be disabled.

[0089]

As described above, according to the present invention,
V. In addition to fast communication, communication with conventional G3 and ECM is now possible. Furthermore, V. It is also possible to give priority to fast communication and change the transmission condition of the CED signal.
This is a V. This has the effect of increasing the probability of communication in fast and increasing high-speed communication.

[Brief description of drawings]

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

FIG. 2 is a flow chart of control of a control circuit 46.

FIG. 3 is a flow chart of control of a control circuit 46.

FIG. 4 is a control flowchart of a control circuit 46.

[Explanation of symbols]

 2 NCU 4 Telephone 6 Hybrid circuit 8 V. 22 Modem 10 V. fast modulator / demodulator 12V. 21 modulator 14 reading circuit 16 encoding circuit 18 V.V. 27 ter, V.I. 29, V.I. 17 modulator 20 2100HZ signal transmission circuit 22 addition circuit 24 V.V. 21 demodulator 26 CED signal detection circuit 28 V.V. 27 ter, V.I. 29, V.I. 17 Demodulator 30 Decoding circuit 32 Recording circuit 34 V.V. fast priority button 36 V. fast priority display circuit 38 V. fast priority mode registration button 40 numeric keypad 42 set key 44 V. fast priority mode registration circuit 46 control circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Kurosawa 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Koichi Abe 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Incorporated (72) Inventor Toshio Kagemo 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Junji Iguchi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. ( 72) Inventor Tatsuya Yaguchi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Yutaka Inoue 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Kazuto Yanagisawa 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Toshiyuki Watanabe 3-30-2 Shimomaruko, Ota-ku, Tokyo Down in the Corporation

Claims (4)

[Claims] 1. V. In a facsimile machine having a fast function, V.V. Two
2 low-band carrier signal is transmitted, but V. 22 cannot detect the high band train signal of V.22. The transmission of the carrier signal of the low band of No. 22 is interrupted, and V.22 is stopped. 21. A facsimile machine, characterized in that it shifts to signal reception of No. 21, and performs communication in G3 or ECM based on CCITT Recommendations T4 and T30. 2. In a facsimile apparatus having a fast function, when a call is received, a V.V. When 22 low band carrier signals are detected,
V. 22 even after the high band train signal has been transmitted and the called station identification signal has been transmitted for a predetermined time. 22 when the low band carrier signal of V.22 cannot be detected. 21 signals and G based on CCITT Recommendations T4 and T30
A facsimile machine characterized by performing communication by 3 or ECM. 3. The method according to claim 2, further comprising: fast
It has a communication priority selection means, A facsimile machine, characterized in that when the fast communication is prioritized, the transmission time of the called station identification signal is lengthened. 4. The method according to claim 3, wherein the V. A facsimile apparatus, wherein the called station identification signal is retransmitted only a predetermined number of times when the fast communication is prioritized.