JPH02132960A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To request interruption of the transmission of a picture signal and to set a conversation mode by detecting an interruption request code IDC returned from an opponent side in response to a repeating sense code ISC and switching a facsimile mode and a conversation mode. CONSTITUTION:When the transmission of a picture signal is interrupted and is to be set to the conversation mode by a facsimile 1A at a transmitting side, an interrupting button 31 is pushed. Then, a repeating code INTC is transmitted, comes to the conversation mode, and at a facsimile 1B at a receiving side, the code INTC is received and becomes a conversation mode. From the facsimile 1A, an interruption sense code ISC is transmitted for a prescribed time. When setting is executed to the conversation mode by the facsimile 1B, an interruption request button 31B is pushed. Then, a code IDC is transmitted in response to the transmission of the code ISC and set to the call mode. When the code IDC is detected by the facsimile 1A, the transmission of the picture signal is interrupted and the call mode is set.

Description

[Detailed description of the invention] [Icheon field of Cn industry] This invention relates to a facsimile machine, and in particular,
It is involved in switching between facsimile mode and conversation mode.

[Summary of the invention]

This invention sends an interruption sense code to the receiving side of the image signal at a predetermined timing, and when the receiving side of the image signal wants to interrupt the transmission of the image signal and carry out a conversation, it responds to the sent interruption sense code. In response, an interrupt request code is sent, and the transmitting side of the image signal detects the interrupt request code sent from the receiving side in response to the interrupt 7th code, and when the interrupt request code is detected, the facsimile mode is switched off. By switching from one conversation mode to another, it is possible to switch from the facsimile mode to the conversation mode even from the image signal receiving side.

[Conventional technology]

There are times when you want to talk to the other party while transmitting an image signal by facsimile. However, with conventional facsimile machines, when transmitting image signals and making calls using one line, it is not possible to transmit image signals and make calls at the same time, so it is necessary to send at least one page worth of image signals. You cannot talk to the other party until after the call has finished.

Therefore, for example, in JP-A-56-50665, when sending an image signal, a command signal is added to notify the sending of the image signal, and when it is desired to send an audio signal, a command signal is added to notify the sending of the audio signal. However, the other party switches between the image signal reception state and the call state depending on whether a command signal informing the transmission of an image signal or a command signal informing the transmission of audio is detected. The one that did is f. il'
! has been done.

Also, JP-A-56-. Publication No. 17162 discloses that it is possible to transmit a signal in which a picture signal and an audio signal are multiplexed by controlling the processing speed of both signals, and an identification signal of this multiplexed signal is transmitted, and on the other side, A device has been proposed in which the identification signal is detected to switch between the receiving state of an image signal and the receiving state of a signal obtained by multiplexing an image signal and an audio signal.

[Problem to be solved by the invention]

However, in the facsimile shown in Japanese Patent Application Laid-open No. 56-50665 and the facsimile shown in Japanese Patent Application Laid-Open No. 56-47162, the image signal is transmitted in one direction from the sending facsimile to the receiving facsimile. Since the command signal that informs the sending of the fax or voice and the identification signal of the multiplexed signal are transmitted, it is possible to switch the operating status of the receiving facsimile from the sending facsimile; cannot change the operating status of the facsimile.

Therefore, an object of the present invention is to provide a facsimile device that can switch the operating state of the image signal receiving side from the image signal transmitting side and also switch the operating state of the image signal transmitting side from the image signal receiving side. be.

[Means to solve the problem]

The present invention includes a mode switching means 10 for switching between a facsimile mode and a conversation mode, an interruption sense code transmitting means 11 and 15 for transmitting an interruption sense code ISC to the other party at a predetermined timing, and an interruption sense code IS.
Interruption request code IDC returned from the other party in response to C
It has a request code detection means 11.15 for detecting the interruption request code IDC returned from the other party in response to the interruption sense code ISC, and switches between the facsimile mode and the conversation mode. This is a facun milli device.

? Effect] In FIG. 5, if you want to interrupt the transmission of the image signal at the facsimile IA on the sending side of both signals and change from facsimile mode to conversation mode, the facsimile IA on the sending side
The interruption request button 31A is pressed. Interruption request button 3
When 1A is pressed, an interrupt code INTC is sent from the sending facsimile IA and the sending facsimile LA
is in conversation mode, and the receiving side's facsimile IB is
After receiving the interruption code I NTC, the machine enters conversation mode.

Furthermore, the facsimile IA on the transmitting side transmits a loop interruption sense code ISC at predetermined time intervals.

If it is desired to set the facsimile IB on the receiving side from the facsimile mode to the conversation mode, the interrupt request button 31B of the facsimile IB on the receiving side is pressed. When the interrupt request button 31B is pressed, the interrupt sense code ISC
In response to the sending of the suspension request code I I) C
is transmitted, and the facsimile IB on the receiving side is set to call mode. When the facsimile IA on the sending side detects this interrupt request code IDC, it interrupts the transmission of the image signal and sets the facsimile IA to a call mode.

While the conversation mode is set, the Tonehurst signal ``B S 'r is exchanged between the facsimile IA on the sending side and the facsimile IB on the receiving side.

When returning from conversation mode to facsimile mode, the interrupt release button 32A or 32B of facsimile IA or facsimile IB is pressed.

When the interrupt release button 32A or 32B is pressed, the Tone Hurst signal 'l'' BST from one side is stopped, and the Tone Burst 1 signal TBST cannot be exchanged.The Tone Hurst signal TBST cannot be exchanged. Then, facsimiles IA and IB are returned to facsimile mode and transmission of image signals is resumed.

〔Example〕

Embodiments of the invention will be described in the following order.

a. Overall construction b. Flowchart explanation C, operation explanation d. Other embodiments a. Overall configuration FIG. 1 shows a facsimile to which the present invention is applied. The facsimile machine to which this invention is applied can be set to a facsimile mode and a conversation mode. In facsimile mode, image signals are transmitted/received. That is, in the facsimile mode, when transmitting an image signal, the image signal is read by the reader 12, encoded by the encoder 13, and transmitted to the other party's facsimile via the telephone line 2. Further, when receiving both signals, the image data sent from the other party is decoded by the decoder 17 and reproduced by the printer 18. In conversation mode, use the facsimile's Hand Sesoto 21,
A voice call is made via the telephone line 2.

Switching between the facsimile mode and the conversation mode is performed by the suinochi 10. That is, the switch 10
When switched to the side, the telephone line 2 is connected to the modem 15 and the facsimile mode is set. Sinch 10
When the switch is switched to side b, the telephone liner 2 is connected to the handheld receiver 21, and the conversation mode is set. Swissochi 1
0 is switched by a switch control signal SW from the system controller 11.

The facsimile l includes a reader 12 that reads images, an encoder 13 that encodes image signals from the reader 12, and a vanofer memory 14.

When transmitting an image signal in facsimile mode, the image signal from the reader 12 is encoded by the encoder 13,
This encoded image signal is stored in the buffer memory 14. The image data read from the vanofer memory l4 is modified by the modem 15. The output of the modem 15 is outputted from the input/output terminal 16 via the switch 10 and transmitted via the telephone line 2.

The facsimile 1 also includes a decoder 17 and a printer 18. When receiving an image signal in facsimile mode, image data transmitted via the telephone line 2 is supplied to the modem 15 via the switch 10. The output of modem l5 is supplied to decoder 17. The image signal is decoded by the decoder l7, and the image is reproduced by the printer 18.

A hand sensor 21 of the facsimile 1 is provided with a microphone unit 22 and a speaker unit 23. A low-pass filter 25 is arranged after the microphone unit 22, and a low-pass filter 24 is arranged before the speaker unit 23. These low-pass filters 24 and 25 have a cut-off frequency of 3 kHz, for example. Low pass filters 24 and 25
is provided to separate 141 the audio signal and the tone Hurst signal T B S i'.

As will be explained in detail later, during a call in conversation mode, a frequency of 3.2kll, for example, is transmitted along with the voice signal.
Tone Haas 1 signal of sine wave signal of z 'I''B S
T is exchanged. This 1-Hrst signal 1”
BST is generated from a sine wave oscillator 26.

This tone burst with a frequency of 3.2kHz {No. S}゛B
ST is supplied to a signal detection circuit 28 via a bandpass filter 27 that passes a frequency component of, for example, a frequency of 3.2kllz. The tone hearth 1 signal T BST is detected by the signal detection circuit 28 , and the detection output is supplied to the system controller 11 .

The system controller l1 is provided with an interruption request button 3l and an interruption release button 32. If the user wants to have a conversation while transmitting/receiving image signals in the facsimile mode, the interrupt request button 3l is pressed. When the interrupt request button 31 is pressed, the transmission/reception of image signals is interrupted and the mode is switched to conversation mode. To return to transmitting/receiving image signals, the interruption release button 32 is pressed. Interruption and restoration of image signal transmission can be performed by either the facsimile on the sending side of both signals or the facsimile on the receiving side of both signals.

In addition, the interruption request button 31 and the interruption cancellation button 32 are
It may also be used in common with a fusoku inch that can be switched by turning on/off the hand control 21. That is,
When the hand cent 2l is turned off, it is equivalent to pressing the interrupt request button 31, and when the hand cent 21 is turned on, it is equivalent to pressing the interrupt release button 32! You can do it like this.

b. Description of Flowchart In one embodiment of the present invention, as described above, switching from facsimile mode to conversation mode or from conversation mode to facsimile transmission is possible on both the image signal transmitting side and the image signal receiving side. It is said that To implement this kind of control, the following code is prepared.

■ Interruption code INTC This code is used when it is desired to interrupt the transmission of both signals in the facsimile on the sending side of the image signal and switch from facsimile mode to conversation mode.

If the sending facsimile's interrupt request button 3l is pressed while an image signal is being transmitted, an interrupt code INTC will be issued.
is sent.

■ Interruption request code IDC This code is used when the facsimile on the receiving side of image signals wants to interrupt the transmission of image signals and switch from facsimile mode to conversation mode. If the interrupt request button 31 of the receiving facsimile is pressed while an image signal is being received, an interrupt request code IDC is sent from the image signal receiving facsimile at the timing when the interrupt sense code ISC is received. be done.

■Interruption sense code ISC A code sent from the sending facsimile to the receiving facsimile at a predetermined timing to set the timing at which the interruption request code DC can be sent from the receiving facsimile to the sending facsimile. It is.

These interruption codes INi”C, interruption request code ■1)
C. A predetermined code that is not included in the image data code is used as the interruption sense code ISC.

■Tone Hurst Signal TBST This is a signal exchanged between the sending facsimile and the receiving facsimile during the conversation mode to confirm whether the conversation mode is maintained. For example, the tone burst signal T B S i' is 3
．． A 2kllz sine wave is used.

The operation of one embodiment of the present invention will be described below based on a flowchart.

FIG. 2 is a flowchart showing the overall operation.

As shown in FIG. 2, first, initial settings are made (step 101), and then it is determined whether a call has been received and the line has been connected (step 102); if a call has been received and the line is not connected, then , a call is made and it is determined whether the line is connected (Step 10)
3). If you receive a call at step 102 and it is determined that the line is not connected, and if you receive a call at step 103 and determine that the line is not connected, then step 1
Return to 02.

When a call is received at step 102 and it is determined that the line is connected, the call goes to step 104. Further, if it is determined in step 103 that the line has been connected after making a telephone call, the process proceeds to step 104.

In step 104, it is determined whether there is a facsimile transmission request. If there is a facsimile transmission request, facsimile transmission 3 processing is executed (step 105). This facsimile transmission process is shown in detail in FIG.

If there is no facsimile transmission request at the steno knob 104, it is determined whether the facsimile reception mode is set (sto knob 106). If the facsimile reception mode is set in step 106,
Facsimile reception processing is performed (step 107).
. This facsimile reception process is explained in detail in the fourth part.

If the facsimile reception mode is not set in step 106, the process returns to step 104.

After the facsimile transmission process is executed in step 105, the process goes to step 108. Further, when the facsimile reception process is finished in the step 107, step 108
go to.

A step 108 determines whether the line is connected or not. If the line is connected at step 108, the process returns to step 104. If the line is not connected in step 108, the process returns to step 102.

In facsimile transmission processing step 105, processing as shown in FIG. 3 is performed.

As shown in the third time, in the transmission processing step, first, the time counter is reset and CTRO is set to O (step 201).

Then, the switch 10 is switched to the modem 15 side (side a) (step switch 202).

When the switch IO is switched to the modem 15 side (a side), it is determined whether the interrupt request button 31 has been pressed (step 203).

If the interrupt request button 31 is not pressed in step 203, it is determined whether the image data to be transmitted has finished or not (step 204).

When it is determined that the image signal to be transmitted has ended in the stereo switch 204, the switch 10 is switched to the side (b) of the hunt sensor 21 (step 207), and the call mode is entered.

If the image data has not been completed in step 204, the image signal for one line read by the reader 12 is encoded by the encoder 13, modulated by the modem 14, and transmitted to the telephone line 2.
(step 205).

When one line of image data is sent, the time counter CTI
”; It is determined whether a predetermined time TI (for example, 2 seconds) has elapsed since the value of O (step 206).

If the predetermined time T1 has not elapsed, the process returns to step 203.

By repeating steps 203 to 206, if the interrupt request button 31 is not pressed and the image data is not finished, the image data is transmitted line by line. Then, the time counter CTROO value increases.

If it is determined in step 206 that the predetermined time T+ has elapsed, an interruption sense code ISC is sent to the receiving side (step 208). Then, the time counter is re-cented (
Step 209).

After sending the interrupt sense code ISC in step 208 and resetting the time counter CTRO in step 209, the interrupt sense code 'ISC is sent and the time counter TI is
．． It is determined whether the interruption request code IDC is returned within l (for example, 0.5 seconds) (stenop 210).

If interrupt request code II)C is not returned, step 203
Return to

By controlling the stenops 203 to 210, image data is transmitted one line at a time, and at the end of one line of data for a predetermined period of time] ``1 line 8i&, an interruption sense code ISC is sent. Ru.

If the transmitting side facsimile wants to interrupt the transmission of the image signal and have a conversation, the interrupt request button 31 is pressed. If it is determined in step 203 that the interrupt request button 31 has been pressed, an interrupt code INT"C is sent (step 2
11). When the interrupt code INTC is sent (Tl
After waiting for +-TZ) time (for example, 0.25 seconds to 0.3 seconds) (stenop 212), the switch 10 is switched to the hand sesoto 21 side (b side) (stenop 213).

In addition, the receiving side facsimile interrupts the transmission of the image signal,
If a conversation is desired, an interruption request code IDC is detected at step 210.

for a predetermined time with Stenop 210. If the interruption request code IDC is detected within the predetermined time period (T, +1゛2) (step 212), the suinochi 10 will not switch to the hand center 21 side (side b) (step 21).
3). Spinch 10 is Hand Senoto 2l {! While switching to III, the conversation is set to C.

And, Tonhurst Shin also said that 3TBST is ', time (
For example, 0.05 seconds) is output (step 214), and (2
T2-TF) within the time Tone-Hurst signal T I3
It is determined whether ST is returned (Step 215).

As will be described later, if the receiving facsimile is set to conversation mode, the tone Hurst signal T BST
will be returned.

When the tone Hurst signal TBST is returned, (
T2'r, ) time is waited (step 1216), and it is determined whether the interrupt release button 32 has been pressed (step 217).

If the interrupt release button 32 is not pressed, step 2
14, the tone Hurst signal TBST is transmitted again.

By repeating the steps from step 214 to step 217, the tone burst signal T BST is exchanged between the sending facsimile and the receiving facsimile during the conversation mode.

If the facsimile on the sending side wants to resume transmitting the image signal, the interrupt release button 32 is pressed.

When the interrupt release button 32 is pressed on the step 217, the I
O.T. After waiting for a while (step 218), the switch 10 is switched to the modem 15 side (side a) (step 219).
), (TI + TZ ) (:.1 (wait (step 220), go to step 205, transmit the image signal for one line, and return to the image signal transmission mode.

When the facsimile on the receiving side wants to resume transmitting the image signal, the tone burst signal T BST - is not returned.

If it is determined in step 215 that the tone Hurst signal TBST is not returned, the Tone Hurst signal TBST is returned again.
” B S T was sent (Stenbu 22l), (2
T2 -Tp) Tone nost signal within time]
' It is determined whether BST is returned (step 222).

When the tone Hurst signal TBST is returned at step 222, the process goes to step 216.

If the step 222 determines that the tone B-st signal TBST is not returned, the tone nost signal T
B S T is transmitted (step 223) and (2 Tz
−T, ) within 1-11 inburst signal T B
It is judged whether or not ST is returned (Stenob 2
24).

Stenop 22, 1 at 1 - Nharth L Signal 'T' B
When ST returns, go to Stenop 216.

If it is determined in step 22l1 that the 1--no-stop signal TBST is not returned, the process goes to step 219C, where the switch 10 is switched to the modem l5 side (a side), and after (TI + T2) time elapses, The image signal for one line is transmitted to the steno panel 205, and the image signal transmission {3 mode is restored.

In the facsimile reception processing stencil 107, processing as shown in FIG. 4 is performed.

switch 10 is switched to the modem 15 side (side a),
It is set to receive an image signal (stenop 30l).

When the switch 10 is switched to the modem 15 side (side a), it is determined whether or not the interruption code NTC has been received (step knob 302).

If the new junior high school code IN'rC is not received at step 302, the interrupt sense code is received.
It is determined whether or not it has been done (Stennob 303).

If the interruption sense code ISC is not received in step 303, it is determined whether the image data has ended (step 304).

If the image data is not finished in the stem 304, 1
The image data for the rows is received (step 305), this image data is decoded by the decoder 17, and the image data is sent to the printer 18.
recorded by.

In this way, in step 302, the interrupt code IN'"C" is not received, and in step 303, the interrupt sense code ISC is not received.
is not received, steps 302 to 305
Such control is repeated, the received image signal is decoded line by line, and the image is reproduced.

When it is determined in step 304 that the image data has been completed, the suinochi 10 is switched to the hand sesoto 21 side (side b) (step 306).

As shown in step 211 in the above-mentioned transmission processing flowchart (FIG. 3), when the transmission side wants to interrupt the transmission of the image signal and start a conversation, an interruption code INC is sent.

When the interrupt code INTC is received by the steno panel 302,
After waiting for T time (step 307), the switch 10 is switched to the hand cent 21 side (side b) (step 308).

Furthermore, as shown by the steno pad 208 in the above-mentioned transmission processing flowchart (FIG. 3), an interruption sense code ISC is sent at the end of one line of data every predetermined time.

When the interrupt sense code ISC is received by the steno knob 303, it is determined whether the interrupt request button 31 has been pressed (sten op 309).

If the receiving side wants to interrupt the transmission of the image signal and have a conversation, the interrupt request button 31 is pressed here.

If the interrupt request button 31 is pressed in step 309, an interrupt request code IDC is sent (step 310).
, TI time (step 307), the switch 10 is switched to the hunt center 2 1 side (b side) (step 308).

If the 1st year junior high school request button 31 is not pressed in step 309, the process goes to step 304.

If the switch 10 fails to switch to the hand sensor 1/21 side (b side) in step 308, the facsimile mode is switched to the conversation mode.

As shown in step 21.1 in the above-mentioned transmission processing flowchart (Fig. 3), the interruption request code 1 IDc
If the signal reaches the other party, the tone Hurst signal T will be sent after a predetermined period of time.
BST will be sent.

Stenop 308 and Sinch 10 on Hunt Sesotho 21 side (
(b side), it is determined whether the tone Hurst signal TBST is received within 10T (step 311).

Tone Hurst signal with stenop 311]” B S T
is received, wait for (TI-TP) time (stenop 312) and then transmit the Torhurst signal T''BST (stenop 313).

If the tone Hurst signal TBST is not received by the steno knob 311, the switch 10 is switched to the modem 15 side (side a) (step 314), and step 302
go to.

Tone Hurst signal T 13 S T with steno knob 313
Once transmitted, it is determined whether the tone Hurst signal T BST is returned within (2T, -T,) time (stenop 315).

As shown in step 7 214 in the above-mentioned transmission process flowchart (FIG. 3), if the interrupt release box 32 is not pressed on the other party's side, the caller 1 is sent from the other party 4.
One signal TBST is returned.

When the Tone Hurst signal T BST is received in step 315, it is determined whether the interrupt release button 32 is pressed (stenop 316), and if the interrupt release button 32 is not pressed, the output goes to the steno knob 312. , (TI T,) time, the tone Hurst signal T'' B S T h< is transmitted (Stenop 313).
.

By manipulating the processes of the step 312, step 313, step 315, and step 316, the exchange of the tone Hurst signal TBST is Cζ.

When the facsimile on the receiving side wants to end the conversation and resume receiving image signals, the middle...1, cancel button 32 is pressed.

When it is determined in step 316 that the middle 1 analysis 5'+'j removal button 32 has been pressed 27, the switch 10 is switched to the modem 15 side (a side) and the tone Transmission of burst signal JBST is stopped. Then, the process goes to step 302 and is set to receive an image signal.

In the above transmission processing flowchart (FIG. 3), steps 1221 to 224 and steps 219 to 220
, as shown in step 205, when the transmitting facsimile cannot exchange the tone burst signal TBST, the tone burst signal TBST is output twice for malfunction prevention 1F, and then both Signal transmission resumes.

When the facsimile on the receiving side ends the conversation and resumes receiving the image signal, as shown in step 217 in the above-mentioned transmission processing flowchart (FIG. 3),
The interrupt release 7K button 32 is pressed. When the middle IUi release button 32 is pressed, as shown by steps 217 to 220 and step 205, the tone burst signal i"BST is no longer sent from the other party, and after a predetermined period of time, both signals are stopped. It's coming.

If the tone burst signal TBST is not received in step 315, the tone burst signal TBST is transmitted again (step 318), and it is determined whether the tone burst signal TBST is received within (2T1TP) time (step 319). ).

If the tone burst signal TBS is received in step 319, the process proceeds to step 316.

If the tone burst signal TBST is not received at step 319, the tone burst signal TBST is further transmitted (step 320), and it is determined whether the tone burst signal TBST is received within (2T'F,) time (step 320). 321).

If the tone burst signal TBS is received in step 321, the process proceeds to step 316.

If the tone burst signal TBST cannot be received by the step 321, the switch 10 is switched to the modem 15 side (side A) (step 314), and the process goes to step 302, where it is set to receive the image signal. .

C. Description of Operation Through the above-described processing, it is possible to switch from facsimile mode to conversation mode or from conversation mode to facsimile mode from either the image signal transmitting side or the image signal receiving side.

That is, FIG. 5 shows a state in which two facsimile machines IA and IB to which the present invention is applied are connected via two telephone lines. In FIG. 5, lΔ is the facsimile on the transmitting side of both signals, and IB is the facsimile on the receiving side of the image signal.

When transmitting both signals from facsimile IA to facsimile IB, as shown in step 202,
Suinochi 10A of facsimile IA is on modem 15A side (
As shown in step 301, the switch IOB of the facsimile IB is switched to the modem 15B side).
The camera is switched to the side (a side).

The image signal from the facsimile IA reader 12A is encoded by the encoder 13A, passed through the buffer memory 14A, modulated by the modem 15A, and then sent to the telephone line 2.
is sent to the facsimile IB via. telephone line 2
A signal sent to the facsimile IB via the facsimile IB is demodulated by the modem 15B and decoded by the decoder 17B. The image sent by the printer 18B is being reproduced.

First, a case will be described in which the facsimile IA on the sending side interrupts the transmission of an image signal and switches the conversation mode.

If the facsimile IA wants to interrupt the transmission of the image signal and make a call, the interrupt request button 31A of the facsimile IA is pressed.

Request for interruption of image signal sending side facsimile I8 Bokun 31
When A is pressed, as shown in step 211, an interruption code I N TC as shown in FIG. 6 is sent from facsimile IA to facsimile IB. In addition, SL
is image data for each line. And step 213
As shown in , the switch IOA of the facsimile IA is switched to the hand 7 note 2lA side (b side) (6th
Figure B).

The facsimile IB on the receiving side receives the interruption code lNTC sent from the facsimile IA. When the interrupt code INTC is received by the facsimile IB on the receiving side, the switch 10B of the facsimile IB on the receiving side switches the switch 10B to the hand cenote 21B side (
b side) (Fig. 6D).

This puts the facsimiles IA and IB into a conversation mode in which they can talk using the handset 21A and handset 21B. When in conversation mode, tone burst signals BST are exchanged.

Next, a case will be described in which the facsimile IB side receiving the image transfer is switched from the facsimile mode to the conversation mode.

As shown in step 208, an interruption sense code ISC as shown in FIG. 7A is transmitted from facsimile IA to facsimile IB at the end of image data SL at predetermined time intervals. When this interrupt sense code ISC is received by the facsimile IB, the interrupt request code 1'lDC can be sent from the facsimile IB to the facsimile IA.

If you want to interrupt the transmission of image signals from the facsimile IB side and make a call to the facsimile IA side, use the Stesop 30
As shown at 9, the interrupt request button 31B of the facsimile IB is pressed.

When the interrupt request button 31B of the facsimile IB is pressed, the facsimile IB waits for an interrupt sense code ISC to be received, as shown in the step no. 310, and issues an interrupt as shown in FIG. 7C. Request code II)C
to come out. This interruption request code IDC is sent from facsimile IB to facsimile IA. Then, as shown by step 308, the Swissochi IOB is switched to the handset 21B side (b side) (FIG. 7D).
.

When the facsimile IA on the sending side receives the interruption request code IDC sent from the facsimile IB, as indicated by step 213, the Suinoji IOA is switched to the hand sent 21A side (b side).

As a result, the facsimiles IA and IB enter a conversation mode in which they use the Hunt Scent 21B and the handset 2LA to make a call.

While the handset 21A of the facsimile IA and the handset 21B of the facsimile IB are being used to make a call, as shown in step 214, the sender's facsimile transmits the message shown in FIG. Toneverse 1/signal TBS'r as shown in 7M is output, and from the receiving facsimile, as shown in stenope 313,
A tone burst signal TBS'F not shown in FIG. 6C or 7C is output, and the tone burst signal TBST
There has been an exchange of This tone-Hurst signal′
"B S T is detected by the signal detection circuits 28A and 28B, respectively. In addition, the low-pass filters 2 and 1A
, 25A, 24B, and 25B, the user cannot hear the tone Hurst signal TBST.

A case will be described in which the facsimile IA on the sending side restarts the transmission of the image signal.

When the facsimile IA on the sending side wants to resume transmitting the image signal, the interrupt release button 32A of the facsimile IA is pressed. When the interrupt release button 32A is pressed, as shown in steps 217 to 219, the tone Hurst signal TBS from the facsimile IA on the sending side is
The transmission of T is stopped (FIG. 8A), and the switch IOA of the facsimile IA is switched to the modem 15A side (a side) (FIG. 8B). Then, in step 220, as shown by the steno panel 205, image transmission is started from the facsimile IA on the sending side after waiting 10T1 hours.

In the facsimile IB on the receiving side, as shown in step 3l5, steps 318 to 321, and step 314,
When the tone burst signal TBST is not returned, the tone burst signal TBST is turned on to prevent malfunction.
After being sent two more times (Figure 8C), the Swiss IOB
is switched to the modem 15B side (b side) (Fig. 8D
). The screen then goes to the steno panel 302 and is set to receive an image signal.

A case will be described in which the facsimile IA on the receiving side restarts transmission of an image signal. When the facsimile IA on the receiving side resumes transmission of the image signal, the interrupt release button 32B of the facsimile IB is pressed. When the cancel button 32 is pressed, as shown in steps 316 and 317,
Dawnburst signal T from facsimile IB on receiving side
BST transmission is initiated (Fig. 9C), and after waiting 6T2 hours, Suinochi 1o connects the modem 15 as shown in Fig. 9D.
Switched to the B side (,1 side).

On the other hand, in the facsimile IA on the sending side, step 221
~224, as shown in step 219, after the tone burst signal TBST is transmitted two more times (FIG. 9A) to prevent malfunction, the switch IOA is switched to the modem 15A side (a side). 9B). Then, transmission of the image signal is started.

d. Other Embodiments In the above-described embodiment, when the transmission/reception of both signals is interrupted to have a conversation or when the transmission/reception of an image signal is restarted, the interruption request button 31 and the interruption release button 31 are used. operation is required.

FIG. 10 shows another embodiment of the present invention, in which the presence of a person in the voice is detected and such operations are automatically performed.

That is, an audio signal detection circuit 41 is provided after the low-pass filter 25 in order to detect audio input from the microphone Unisoto 22 of the Hunt Seso I-21.

The output of the audio signal detection circuit 41 is transmitted to the system controller 1.
1. Then, the audio signal is detected by the audio signal detection circuit 11; i1. , interrupt the image signal transmission,
Audio signal detection times +! ? When the audio signal is no longer detected at j41, the transmission of the image signal is restarted.

By the way, if the mode is switched after detecting the audio signal from the microphone unit 22 of the handset 21, the audio signal may not be inputted due to the delay time from when the audio signal is input manually until the mode is switched. The audio will be cut off immediately after.

Therefore, FII"O that stores the audio signal immediately after audio input
(First in first out register)
42 are provided. The audio signal immediately after the audio input is A/D.
FFFO42 after being converted into digital by Converk43
is stored in The read speed of the FIF 042 is controlled by the pinch controller 44. F I FO4 2
The audio signal from the D/A converter 45 is converted back to an analog signal.

The audio signal from the microphone unit 22 and the FIFO
A switch 46 is provided for switching the audio signal read from the audio signal 42. This switch 46 is controlled by a switching signal from the system controller l1. When the switch 46 is switched to the a side, the audio signal from the microphone unisoto 22 is output from the suinochi 46. When the switch 46 is switched to the b side,
F[The audio signal from the FO 42 is output from the switch 46. The output of the suinochi 46 is outputted via an echo canceller 47.

When the audio signal output circuit 41 outputs the audio signal, the switch 10 is switched to the b side and enters the conversation mode. Immediately after voice input, Suinochi 45 is switched to side b,
An audio signal of 5゜ε is output from F○42. At this time, the read speed of the FIFO4 2 is set to be slightly faster than the normal speed.

The switch 46 is switched to the a side at the timing when the audio signal read from the FIFO 4 2 and the audio signal input to the microphone unit 1/22 match. As a result, the audio signal immediately after the audio input is not interrupted by L2.

In addition, the echo canceller 47 is
This is provided to prevent an echo from occurring in the sound output from the speaker unit 23 due to the audio signal being sold and the audio signal from the microphone unit 22.

[Effects of the Invention] According to the present invention, it is possible to set the facsimile mode to the conversation mode on the facsimile machine on the side that transmits the image signal, and it is also possible to set the facsimile mode to the conversation mode on the facsimile machine on the side that receives the image signal. .

In other words, if you want to change the facsimile mode from the facsimile mode to the conversation mode on the facsimile transmitting the image signal, the facsimile transmitting the image signal sends an interrupt code F' I N T.
C is sent, and the facsimile machine on the sending side goes into conversation mode, and the facsimile machine on the receiving side receives the interruption code (NTC) and goes into conversation mode.

If you want to change the receiving facsimile from facsimile mode to conversation mode, use the interrupt sense code IS sent from the sending facsimile at a predetermined timing.
In response to the interrupt request code II) C, the receiving facsimile is set to talk mode, and the transmitting facsimile receives the interrupt request code II) C and switches to the conversation mode. Become.

Therefore, if it is desired to have a conversation while the image signal is being transmitted, either the image signal transmitting side or the image signal receiving side can immediately interrupt the image signal transmission and set the conversation mode.

[Brief explanation of drawings]

Figure 1 is a flow chart of an embodiment of this invention, Figures 2 to 4 are flowcharts used to explain an embodiment of this invention, and Figure 5 is used to explain the operation of an example of this invention. Bronok diagrams, FIGS. 6 to 9, are timing charts used to explain the operation of one embodiment of the second invention. FIG. 10 is a block diagram of another embodiment of the invention. Explanation of main symbols in the drawings 2: Telephone line. 10: Switch ll: System controller, 15: Modem 2I hand sesotho. 26: Sine wave oscillator, 28: Signal detection circuit. 3
1: Suspension request button 32: Suspension release button.

Claims (1)

[Scope of Claims] Mode switching means for switching between facsimile mode and conversation mode; Interruption sense code transmitting means for transmitting an interruption sense code to the other party at a predetermined timing; and an interruption request code detection means for detecting an interruption request code returned from the other party, and detects an interruption request code returned from the other party in response to the interruption sense code, and switches between facsimile mode and conversation mode. facsimile machine.