JPH03102962A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To attain the communication with an opposite party and to execute correct facsimile communication by forming a speech line with a destination telephone set in reply to a n incoming call when the call from a 3rd party comes during facsimile communication. CONSTITUTION:When the operator selects the call waiting reception mode, an incoming call notice tone is outputted from an incoming notice tone output section 11. When the operator hooks off a telephone set 6 at the output of the incoming call notice tone, the communication line between the line and the 3rd party are formed at a line network side through the transmission of a hooking signal and the telephone set 6 connects to the line. When the operator starts talking, the talking is stopped when the communication with the destination facsimile equipment is busy. In the case of the normal mode, since a filter eliminating the incoming display signal from the 3rd party is provided between the telephone line and a MODEM 4 demodulating a facsimile signal, the effect of the incoming display signal is avoided.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to a facsimile machine.

[Prior Art] As one of the communication services in the public telephone line network, when a call is received from a third party during a call with the other party, the call is temporarily put on hold and the call is answered by the third party. There is a call waiting service that allows you to In this call waiting service, when a call arrives from a third party, the receiver outputs an incoming call display sound, which is a fixed tone signal, to notify the caller of the incoming call from the third party. .

Incidentally, while facsimile communication is being performed on a line using such a call waiting service, a call may be received from a third party.

[Problems to be Solved by the Invention] However, in this case, the facsimile machine did not detect the above-mentioned incoming call display sound, so the operator could not know that there was an incoming call from a third party. For this reason, even if it is necessary to make a call to a third party, there is a problem in that the incoming call cannot be answered.

Furthermore, the above-mentioned incoming call display sound is a 400Hz tone signal modulated by 16HzTL-AM, but when a facsimile machine receives such a tone signal together with a facsimile signal, the tone signal becomes noise and the received data is distorted. There was a problem in that there was a risk that an error would occur and the correct facsimile machine would not be able to execute.

The present invention solves the above problems and provides a facsimile device that allows an operator to answer and talk to a third party when receiving an incoming call from a third party during facsimile communication, and a It is an object of the present invention to provide a facsimile device that can perform correct facsimile communication.

[Means for Solving the Problems] The first invention detects an incoming call display signal that indicates an incoming call from a third party during facsimile communication, and when the incoming call display signal is detected, an incoming call from a third party is detected. In response to the call, a telephone line is established between the other party and the telephone.

In a second aspect of the invention, a filter circuit for removing an incoming call display signal is disposed between a telephone line and a modem for demodulating a received facsimile signal.

[Operation] According to the first invention, when receiving an incoming call from a third party during facsimile communication, it becomes possible to talk to the other party using the telephone. Further, according to the second invention, correct facsimile communication can be performed regardless of whether a call is received from a third party.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a block diagram of a facsimile machine according to an embodiment of the present invention. In the figure, a scanner I reads an original image and extracts image information, and a plotter 2 records the image information on recording paper.
The encoding/decoding unit 3 encodes image information to be transmitted and decodes received image information.

The modem 4 modulates and demodulates image information and transmits it using a known transmission control procedure.The network control device 5 connects a telephone line and a telephone set 6, seizes the line, and sends a selection signal that is the destination telephone number. It performs predetermined call originating and receiving operations by sending out and detecting incoming calls.

The operation display section 7 displays the operating status of the device and is used by the operator to perform various operations. CPU8 is
The ROM 9 is used to control each of the above-mentioned parts, and stores the control program and various fixed data necessary for operation. RAMIO temporarily stores various data when the CPU 7 is operating.

The incoming call notification sound output section 11 outputs a tone from a speaker or the like to notify the operator of the incoming call from a third party during facsimile communication. System bus 2 is a signal line that exchanges various control signals and data between the towns in each of the above areas. FIG. 2 shows a circuit diagram of the network control device R5. In the figure, the two lines of the telephone line are connected to the common terminal Celet of each circuit of the two-circuit, two-contact switching circuit 5l, and one contact axtaz is connected to the telephone 6 and the hook of the telephone 6. A hook state detection circuit 52 that detects the state, and a ring signal detection circuit 5 that detects a ring signal from the line when a call is received.
It is connected to 3. In addition, the other contact b1 of each circuit
, b, are connected to both ends of one winding of the transformer 54, respectively.

One end of the other winding of the transformer 54 is grounded, and the other end is connected to a two-wire side terminal of a hybrid circuit 55 that converts a two-wire signal of a telephone line into a four-wire signal. A transmission signal line of the modem 4 is connected to one end of the four-wire system. The other end is connected to an incoming call detection circuit 56 that detects an incoming call display signal of the call waiting service, and to a common terminal C of one circuit of a two-circuit, two-contact switching circuit 57. Terminal a of one of the circuits is connected to terminal a4 of the other circuit.

Terminal b of one of the circuits is connected to a 400Hz cutoff filter 58 that blocks a 400Hz signal component, and a 16Hz cutoff filter 58 that blocks a 400Hz signal component.
It is connected to contact b4 of the other circuit via a 16 Hz cutoff filter 59 that blocks the signal component of z. The common terminal c4 is connected to the receiving signal line of the modem 4.

Then, a hook state detection circuit 52 and a calling signal detection circuit 5
3 and the incoming call detection circuit 56 are input to the CPU 8, and the switching circuit 51 and the switching circuit 57 are input to the CPU 8.
Switching is controlled by.

In the above structure, it is assumed that the telephone line is a line that receives call waiting service. Furthermore, the facsimile apparatus of this embodiment has two operating modes: a call waiting acceptance mode in which the incoming call is accepted when the incoming call is received from a third party during facsimile communication, and a normal mode in which the incoming call is ignored.

Therefore, the operator sets the desired operation mode in advance by performing a predetermined operation on the operation display section 7. When the facsimile machine is not in communication, the switching circuit 51 is connected to the contacts ax and taz, and the telephone 6 is connected to the telephone line. Thereby, the operator uses the telephone 6 as a normal telephone for making calls.

FIG. 3 shows the operation of the facsimile machine when receiving an image. In this case, the operator first speaks to the other party, receives a notification from the other party that a document will be sent, and performs an operation to start a receiving operation on the operation display section 7 (process 101). When the facsimile machine starts up, the switching circuit 5
1 to the contact b et b Z side and connect the line to the facsimile machine side (process 102). Also, at this time, the switching circuit 57 is connected to the contact a3ta4 side to directly connect the line from the hybrid circuit 55 to the modem 4 (processing 10
3). As a result, the received signal from the line is input to the modem 4 via the switching circuit 51, the transformer 54, and the hybrid circuit 55, and the transmitted signal from the modem 4 is sent to the line via the switching circuit 57 and the above-mentioned parts. will be done. Here, the facsimile machine starts a receiving procedure (process 104). Thereby, a predetermined transmission control procedure is executed with the destination facsimile machine, and the transmitted image information is sequentially received.

During this communication, the facsimile machine uses the incoming call detection circuit 56 to monitor the incoming call from the third party and the completion of the receiving operation (process 105, from N in process 105 to process 106, and from N in process 106 to process 105).

Here, if an incoming call is received from a third party, a predetermined incoming call indication number a is sent from the line network side. This incoming call display signal is a 400 Hz tone signal that is AM modulated at 16 Hz, and the incoming call detection circuit 56 detects this signal.

When this incoming call display signal is detected (Y in process 105), it is determined whether the operation mode is set to the call waiting reception mode (process 107).

Assuming that the call waiting reception mode is set (Y in process 107), an incoming notification sound is output from the incoming notification sound output unit l1 until the telephone 6 is off-hook (process 108, process 109, process 109?). N to process 108). When the incoming call notification tone is output, the operator takes the telephone 6 off-hook.

When the telephone 6 goes off-hook, the facsimile machine (
Y) of process 109, common terminal C■, 2 of switching circuit 51
By opening the line for a short time and connecting between contacts b1 and b2, a hooking signal is sent to the line (process l10
). Then, the common terminals C1 and C2 are switched to the contact a/ela2 side (processing 111).

By sending out the hooking signal, a communication line is formed between the line and a third party on the line network side, and the telephone 6
is connected to that line. Therefore, the operator
Make a call with someone. Then, when the call ends, the phone 6
on-hook.

Note that when the operator starts the above-mentioned call, communication with the other party's facsimile machine with which the operator was communicating is interrupted, so the other party's facsimile machine determines that the communication has been interrupted and stops the transmission operation.

On the other hand, if the call is received from a third party and the normal mode is set (Y in process 107), the switching circuit 57 is switched from contact b to jb.
Switch to 4, and put 400H on the line of the received signal from the line.
The z cutoff filter 58 and the 16Hz cutoff filter 59 are inserted (processing 112), and the completion of reception is monitored (processing 1).
to 06).

As mentioned above, the incoming call display signal is a 4001{z signal AM modulated at 16 Hz, so by inserting each of the above filters, only the incoming call display signal is removed from the received signal and input to the modem 4. Become so.

As a result, the modem 4 correctly receives the facsimile signal and continues the predetermined facsimile communication without being affected by the incoming call display signal.

When the image reception is completed (Y in process 106), the switching circuit 51 is switched to the contact a etax side (process 1l).
1).

At this time, since the telephone 6 is on-hook, the line is disconnected and the receiving operation is completed.

As described above, in this embodiment, if the operator sets the device to the call waiting reception mode, when there is an incoming call from a third party during facsimile communication, an incoming call notification sound is output, and the operator By taking the telephone 6 off-hook, the user can talk to the other party.

In addition, if the normal mode is set, when a call arrives from a third party, a filter circuit is inserted into the received signal line to remove the incoming call display signal, and facsimile communication continues, which prevents the negative effects of the incoming call display signal. It becomes possible to perform correct facsimile communication without receiving any error.

In addition, in the above embodiment, the case where image information is received has been explained, but in the case where image information is sent, if the incoming call reception mode is set, the call can be made with a third party. Needless to say. Also, in the case of transmission, if the normal mode is set, a 400H2 cutoff filter 58 and a 16Hz cutoff filter 59 may be inserted into the reception signal line in order to prevent reception errors of procedure signals in transmission control. .

Furthermore, the 40011z cutoff filter 58 and the 16Hz cutoff filter 59 that remove the incoming call display signal are connected to the switching circuit 57.
By switching the connection, it was inserted into the receiving signal line only when necessary, but the facsimile signal was 400H.
If a certain portion of the 16 Hz or 16 Hz signal is not used, it can be permanently inserted into the received signal line.

Furthermore, although the operator is notified by sound of an incoming call during facsimile communication, it goes without saying that notification may be made by a lamp or other display means.

[Effects of the Invention] As described above, according to the present invention, when an incoming call is received from a third party during facsimile communication, a telephone line is established between the other party and the telephone in response to the incoming call. Therefore, it becomes possible to talk to the other party.

Further, according to the second invention, a filter circuit for removing the incoming call display signal is disposed between the telephone line and the modem for demodulating the received facsimile signal.
Correct facsimile communication can be executed regardless of whether the call is received from a person.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a facsimile machine according to an embodiment of the present invention, FIG. 2 is a circuit diagram of a network control device, and FIG.
The figure is a flowchart of the receiving operation of the facsimile machine mentioned above. 1...Scanner, 2...Plotter, 3...Encoding/decoding unit, 4...Modem, 5...Network control device, 6...
...Telephone, 7...Operation display section, 8...CPU, 1
0...RAM. 11... Incoming call notification sound output unit, 12.
...System path, 51.57...Switching circuit, 52.
...Hook state detection circuit, 53...Call signal detection circuit, 54...Transformer, 55...Hybrid circuit,
56...Incoming call detection circuit, 58...400t{z cutoff filter, 59...1611z cutoff filter. 1st Figure 5℃←-2 12

Claims (2)

[Claims] (1) In a facsimile machine that is connected to a telephone line that receives call waiting service and is equipped with a telephone, an incoming call detection means that detects an incoming call display signal that indicates an incoming call from a third party during facsimile communication, and an incoming call display. A facsimile apparatus characterized in that it is provided with a line control means that responds to an incoming call from the third party when a signal is detected and forms a communication line between the other party and the telephone set. (2) In a facsimile device connected to a telephone line receiving call waiting service, an incoming call display signal indicating an incoming call from a third party in call waiting service is removed between the telephone line and the modem that demodulates the received facsimile signal. A facsimile device characterized in that it is equipped with a filter circuit.