JPH06169389A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To surely prevent a slave telephone set from ringing by a calling signal from an exchange side even if a slave telephone set with a tone ringer is connected. CONSTITUTION:The slave telephone set 6 is connected to the facsimile equipment 1. A diode 25 is interposed between the slave telephone set 6 and a TEL relay 22 and arranged so as to allow only the passage of a current from the side of a telephone line 5 to the side of the slave telephone set 6. When the slave telephone set 6 is placed in the on-hook state in a communication awaiting state, a changeover relay 24 is switched on the side of a contact (a) to connect the slave telephone set 6 to telephone line 5 through the diode 25. At the time of arrival of incoming call or when the slave telephone set 6 is placed in the off-hook state, the changeover relay 24 is switched on the side of a contact (b) to connect the slave telephone set 6 to telephone line 5 not through the diode 25. When a ringing signal is received in the communication stand-by state, the ringing signal is inputted to the slave telephone set 6 as a positive half wave since the slave telephone set 6 and telephone line 5 are connected through the diode 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine to which a slave telephone can be connected.

[0002]

2. Description of the Related Art In this type of facsimile machine,
By connecting a slave telephone, facsimile communication can be performed when the other party is a facsimile machine, and telephone communication can be performed when the other party is a telephone. That is,
At the time of reception, a 16 Hz call signal is transmitted from the exchange side, and when the call signal is detected, the telephone line is closed and an incoming call is made. Then, when a CNG signal indicating that the device is a facsimile device is transmitted from the calling side, the facsimile reception operation is started. Also, although the slave telephone is connected to the telephone line in the communication standby state,
When an incoming call is received and the telephone line is closed, the ringing signal from the exchange side is stopped, so that the slave telephone does not ring. However, since the calling side may be a telephone, after the call is received, a pseudo bell sound is generated to ring the sub-phone to notify the user of the incoming call.

Further, in this type of facsimile machine, the sub-phone is ringed by the call signal from when the call signal of 16 Hz is transmitted from the exchange side until the telephone line is closed and an incoming call is received. Need to be blocked. That is, if the sub-phone is taken off-hook based on the ringing of the sub-phone before the call is received by the device, it becomes necessary to perform a predetermined operation to shift to the facsimile receiving operation when the calling side is a facsimile device. Therefore, it is necessary to prevent the sub-phone from ringing while waiting for an incoming call.

Therefore, in the conventional facsimile apparatus,
When a calling signal from the exchange side is detected, the connection between the slave telephone and the telephone line is immediately opened to prevent the calling signal from being input to the slave telephone.

[0005]

However, since there is a slight time lag between the detection of the calling signal from the exchange side and the opening of the connection between the slave telephone and the telephone line, the calling signal is transmitted. It is difficult to completely block input to the telephone.

Here, as a slave telephone, a mechanical ringer such as a magnet electric bell which is directly driven by a calling signal is used.
When a 00-type telephone or the like is used, there is almost no fear that the ringer will be activated by a slightly input call signal.

However, in a telephone such as a so-called home telephone having an electronic ringer (tone ringer), when the ringing signal is input for at least one cycle, the tone ringer sounds. Therefore,
If a slave phone having a tone ringer is used, there is a problem that the tone ringer may ring even if the slave phone and the telephone line are opened immediately after the call signal is detected.

The present invention has been made to solve the above problems, and an object thereof is to ensure ringing of a slave telephone by a call signal from the exchange side even when a slave telephone having a tone ringer is connected. Another object of the present invention is to provide a facsimile apparatus that can prevent the above.

[0009]

In order to achieve the above object, according to the present invention, a switching device is provided in a facsimile machine in which a slave telephone can be connected and the connection between the slave telephone and a telephone line is closed in a communication standby state. When the call signal is transmitted from the side, the invalidation means for invalidating the call signal input to the slave telephone is provided.

[0010]

Therefore, according to the present invention, in the communication standby state,
The connection between the slave telephone and the telephone line is closed. Then, when the call signal is transmitted from the exchange side, the invalidation means invalidates the call signal input to the slave telephone. Therefore, even if the call signal is transmitted, the call signal is not input to the sub-phone, so that the sub-phone does not ring.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the facsimile device 1 has a facsimile device main body 2, an NCU (network control unit) 3, and an attached telephone 4. The main body 2 of the facsimile apparatus transmits / receives image data to / from the other side, that is, performs a facsimile operation.
The NCU 3 controls the connection with the telephone line 5. The attached telephone 4 performs a call operation with the other party.

Further, a slave telephone 6 is connected to the facsimile apparatus 1 via a cable (not shown), and the slave telephone 6 can also perform a call operation with the other party. In this embodiment, a sub telephone 6 having a tone ringer such as a so-called home telephone is used as the sub telephone 6.

Now, the facsimile apparatus body 2 will be described. A CPU (Central Processing Unit) 7 has a ROM (Read Only Memory) 8 storing programs for controlling the operation of the entire facsimile apparatus main body 2 and the operation of the NCU 3, and a RAM for temporarily storing various information.
(Random access memory) 9 is connected. The modem 10 modulates and demodulates transmitted / received data, and
Push tone (DTM) corresponding to the telephone number of the other party
F) Generate a signal or the like.

In the modem 10, the tone generation circuit 1 is also provided.
1 and a tone detection circuit 12 are provided, and the tone generation circuit 11 uses a 1100 Hz ringing tone (CNG), 2100H.
The called station identification signal (CED) of z, a pseudo ringback tone described later, and the like are generated. Then, the tone detection circuit 12 detects the CNG signal and the CED signal.

Further, the CPU 7 is connected to a reading unit 13 for reading an image on a document and a recording unit 14 for printing on a recording paper based on the received image data. Furthermore, a buzzer sound is generated in this CPU 7,
Buzzer 15 to notify the operator of the incoming call from the sender
An operation key (not shown) such as a dial key for inputting a telephone number or the like is connected.

Next, the NCU 3 will be described. C
The ML relay 16 is provided to selectively connect the telephone line 5 to the modem 10 side of the facsimile apparatus main body 2 and the incoming call detection circuit 18 side described later. Then, under the control of the CPU 7 of the facsimile apparatus main body 2, as shown by the solid line in FIG. 1, when the CML relay 16 is switched to the a contact side, the telephone line 5 is connected to the incoming call detection circuit 18 side. On the other hand, as shown by the chain line in FIG.
When the relay 16 is switched to the b contact side, the telephone line 5 is connected to the modem 10 side via the transformer 17.

When switching the contacts of the CML relay 16, the switching to the other contact is performed while the connection to the one contact is maintained, and after the switching, the connection to the one contact is released. . That is, when switching contacts
The connection with both contacts is not released, and the connection with at least one contact is maintained. Further, the CML relay 16 is arranged so as to be switched to the a contact side in the communication standby state of the device.

The incoming call detection circuit 18 is composed of a photo coupler, the LED 18a is connected to the contact a side of the CML relay 16, and the phototransistor 18b is the C contact.
Connected to PU7. Then, the CPU 7 monitors the on / off state of the phototransistor 18b, and detects the 1
The presence or absence of a 6 Hz ringing signal (ring tone) is detected.
The first and second off-hook detection circuits 19 and 20 are connected to the auxiliary telephone 4 and the slave telephone 6, and are connected to the telephones 4 and 4, respectively.
6 off-hook (handset picked up)
Is detected and the detection result is output to the CPU 7.

The ringing voltage generating circuit 21 is provided for each telephone 4,6.
Is for supplying a predetermined current to each of the telephones 4 and 6 in order to detect the off-hook of the telephone, and the input voltage is +2.
4V is applied. That is, when the telephones 4 and 6 are off-hook, the change in the current supplied to the telephones 4 and 6 is detected by the off-hook detection circuits 19 and 20.
Then, the CPU 7 recognizes the off-hook state based on the detection of the current change by the off-hook detection circuits 19 and 20. The ringing voltage generating circuit 21 also has a function of generating a pseudo bell signal of 16 Hz to cause a tone ringer (not shown) of the slave telephone 6 to ring and notify the user of an incoming call from the calling side. The pseudo bell signal will be described in detail later.

The calling voltage generating circuit 21 is connected to the telephones 4 and 6 via the TEL relay 22 so as to be switchable with the telephone line 5. Then, under the control of the CPU 7, as shown by the solid line in FIG.
Is connected to the a-contact side, the telephones 4 and 6 are connected to the telephone line 5 side. On the other hand, as shown by the chain line in FIG. 1, when the TEL relay 22 is connected to the b contact side, the telephones 4 and 6 are connected to the ringing voltage generation circuit 21.

Even when the contact of the TEL relay 22 is switched, as in the case of the CML relay 16,
Switching to the other contact is performed while the connection to the one contact is maintained, and after the switching, the connection to the one contact is released. Also, in the communication standby state of the device, TEL
The relay 22 is arranged so as to be switched to the a contact side, and the connection between the telephones 4 and 6 and the telephone line 5 is closed. The transformer 23 is connected to the telephones 4 and 6, and its output side is connected to the modem 10.

A diode 25 as a disabling means is interposed between the slave telephone 6 and the TEL relay 22 and arranged so as to allow only the passage of current from the telephone line 5 side to the slave telephone 6 side. . Switch relay 24 is telephone line 5
Is connected to the sub-telephone 6 via the diode 25 or is selectively switched between the diode 25 and the sub-telephone 6.

That is, under the control of the CPU 7, as shown by the solid line in FIG. 1, when the switching relay 24 is connected to the a contact side, the slave telephone 6 is connected to the telephone line 5 via the diode 25. On the other hand, as shown by the chain line in FIG. 1, when the switching relay 24 is connected to the b contact side, the slave telephone 6 is connected to the telephone line 5 with the diode 25 passing through. In the communication standby state of the device, the switching relay 2
4 is switched to the contact a side, and the slave telephone 6 and the telephone line 5 are connected via a diode 25.

Then, as shown in FIG. 2, when a call signal of 16 Hz is transmitted from the exchange side via the telephone line 5, the CPU 7 detects the call signal via the incoming call detection circuit 18. When the CPU 7 detects the calling signal a predetermined number of times (twice in the present embodiment), it switches the CML relay 16 to the contact b side, and the telephone line 5 to the modem 10.
Connect to the side. At the same time, the CPU 7 also switches the TEL relay 22 and the switching relay 24 to the b contact side, as shown by the chain line in FIG. 1, to connect the telephones 4 and 6 to the ringing voltage generation circuit 21. At this time, the slave telephone 6 is connected to the ringing voltage generation circuit 21 while passing through the diode 25.

Thereafter, the CPU 7 causes the tone detection circuit 12
The detection of the CNG signal from the calling side is started, and the tone generation circuit 11 in the modem 10 is activated,
The pseudo ringback tone is sent to the calling side a predetermined number of times (12 times in this embodiment). When the CPU 7 detects the CNG signal from the calling side via the tone detection circuit 12, it determines that the calling side is a facsimile machine and starts a facsimile operation according to a predetermined facsimile procedure.

If the CNG signal is not detected yet after the pseudo ringback tone is transmitted four times,
The CPU 7 determines that the calling side may be a telephone. Then, the CPU 7 operates the buzzer 15 to generate a buzzer sound a predetermined number of times (9 times in this embodiment). or,
At the same time, the CPU 7 operates the ringing voltage generation circuit 21 to generate a pseudo bell signal of 16 Hz, and causes the tone ringer of the slave telephone 6 to ring a predetermined number of times (9 times in this embodiment). The user is notified of the incoming call from the calling side by the sound of the buzzer and the tone ringer. As shown in FIG. 2, the buzzer sound and the pseudo bell signal are generated one second at intervals of two seconds.

When the auxiliary telephone 4 or the sub telephone 6 is off-hooked based on the buzzer sound or the tone ringer ringing, the first or second off-hook detection circuit 19, 20 outputs an off-hook detection signal to the CPU 7. To do. Then, the CPU 7 causes the CML relay 16 and the TEL
Switch the relay 22 to the a-contact side, and place the telephone line 5
To connect to the telephones 4 and 6 to enable communication. At this time, since the switching relay 24 is arranged on the b contact side, the slave telephone 6 is connected to the telephone line 5 in a state of passing the diode 25.

When the sub-phone 6 is hooked after the call is completed, the CPU 7 switches the switching relay 24 to the a-contact side again as shown by the solid line in FIG.
And the telephone line 5 are connected via the diode 25.

The above-mentioned pseudo ring back tone is
It is an audible signal that is artificially transmitted to the transmitting side. That is, as shown in FIG. 2, when the call signal (ring tone) of 16 Hz is transmitted twice from the exchange side, the facsimile apparatus main body 2 detects an incoming call and closes the line with the calling side. Let But in this case,
For example, when the calling side is a telephone, it is unnatural that there is no response from the unit even though the calling signal is stopped twice. Therefore, by sending a pseudo ringback tone to the caller when the call signal is transmitted twice from the caller and an incoming call is detected,
I try to eliminate the unnaturalness.

The pseudo ring-back tone is sent for 1 second at intervals of 2 seconds like the buzzer sound and the pseudo bell signal. Since the CNG signal cannot be detected by the tone detection circuit 12 while the pseudo ringback tone is being transmitted, the above-mentioned CNG signal is detected for 2 seconds when the pseudo ringback tone is not transmitted. To be done. That is, the transmission of the pseudo ringback tone and the detection of the CNG signal are
Alternately done.

Next, the operation of the facsimile apparatus configured as described above will be described with reference to the timing chart of FIG. 2 and FIGS.
It will be described in accordance with the flowchart of. Now, at the time of reception by this facsimile apparatus, the operation shown in the flowchart of FIG. 3 is performed under the control of the CPU 7. That is, when the call signal of 16 Hz is transmitted from the exchange side while the telephones 4 and 6 are not off-hook and the call signal is detected twice (steps S1 and S2), the CM
L relay 16, TEL relay 22, and switching relay 24
Is switched to the b contact side (step S3). Then, in this state, the pseudo ringback tone is transmitted to the calling side 12 times (step S4).

When the CNG signal from the calling side is detected while the pseudo ringback tone is transmitted four times, it is judged that the calling side is a facsimile machine and the transmission of the pseudo ringback tone is stopped. (Step S
5 to S6). Then, the operation shifts to the facsimile receiving operation (step S7).

If the CNG signal is not detected while the pseudo ringback tone is transmitted four times, it is judged that the calling side may be the telephone, and the buzzer sound and the pseudo bell signal are generated. Is started, and the auxiliary telephone 4 and the slave telephone 6 ring 9 times (steps S8 to S).
9). Although not shown in the flowchart, if the CNG signal is detected while the buzzer sound and the pseudo bell signal are being generated, the facsimile reception operation is started.

Then, for example, when the slave telephone 6 is off-hooked based on the ringing of the slave telephone 6 by the pseudo bell signal, the generation of the buzzer sound or the pseudo bell signal and the transmission of the pseudo ringback tone are stopped (step S10). ~ S
11). At the same time, the CML relay 16 and the TEL relay 22 are switched to the a-contact side, and the slave telephone 6 is connected to the telephone line 5 with the diode 25 passing therethrough, and the telephone is ready for communication (step S12). Therefore, when the calling side is a telephone, a call is made (step S1).
3). When the call ends and the sub-phone 6 is hooked, the switching relay 24 is switched to the a contact side,
The slave telephone 6 and the telephone line 5 are connected via the diode 25 (steps S14 to S15).

If no off-hook is detected while the buzzer sound or the pseudo bell signal is generated nine times, the facsimile reception operation is started (steps S16 to S16).
17). That is, when facsimile communication is performed by manual transmission on the transmitting side, the CNG signal is not transmitted. Therefore, even in such a case, the facsimile operation is automatically performed if the CNG signal is not detected within a predetermined period from the incoming call so that the facsimile can be received without going off hook.

As described above, the slave telephone 6 is connected to the telephone line 5 through the diode 25 when it is on-hook in the communication standby state, and when the call signal from the exchange side is detected twice. , The call signal is input to the slave telephone 6 via the diode 25. Therefore, as shown in FIG. 5B, the call signal of 16 Hz on the telephone line 5 is input to the slave telephone 6 side in a positive half-wave state, but the tone ringer in the slave telephone 6 is It does not ring based on the positive half-wave. That is, in order for the tone ringer to ring, the ringing signal must be input for at least one cycle, but in this embodiment, the ringing signal is not input for one cycle.

That is, the ringing signal input to the slave telephone 6 is invalidated by the diode 25 and does not serve as a ringing signal. Therefore, even if the sub-telephone 6 has a tone ringer, it is possible to reliably prevent the sub-telephone 6 from ringing due to a calling signal from the exchange side.

As shown in FIG. 5 (a), since the call signal of 16 Hz on the telephone line 5 is inputted to the facsimile apparatus main body 2 side as it is, the CPU 7 detects the call signal. It is possible to surely detect twice through the circuit 18 and receive the incoming call. Therefore, the diode 25
There is no fear that the incoming call operation will be hindered by the influence of. Further, the slave telephone 6 is connected to the ringing voltage generation circuit 21 in a state of passing the diode 25 when receiving a call, and is connected to the telephone line 5 in a state of passing the diode 25 even in off-hook. Therefore, due to the influence of the diode 25, the ringing of the slave telephone 6 due to the pseudo bell signal from the ringing voltage generation circuit 21 is disturbed, or the slave telephone 6
It is possible to prevent the call operation from being disturbed.

Next, the slave telephone 6 of this facsimile apparatus
When making a call, the operation as shown in the flowchart of FIG. 4 is performed under the control of the CPU 7. That is, when the slave telephone 6 is off-hooked in step S2 of FIG. 3 described above, the switching relay 24 is switched to the b contact side, and the slave telephone 6 is connected to the telephone line 5 with the diode 25 passing (step S2). S18). When the other party goes off-hook after performing a predetermined dial operation, a call is made with the other party (step S19).
~ S20). Then, when the call ends and the slave telephone 6 is hooked on, the switching relay 24 is switched to the a contact side, and the telephone line 5 and the slave telephone 6 are connected via the diode 25 (steps S21 to S22).

That is, the sub-telephone 6 is connected to the telephone line 5 while passing the diode 25 when it is off-hook. Therefore, when making a call, the same as when receiving
It is possible to prevent the call operation from being hindered by the influence of the diode 25.

As described above, in the facsimile apparatus of this embodiment, when the slave telephone 6 is on-hook in the communication standby state, the switching relay 24 is switched to the a-contact side so as to switch the slave telephone 6 and the telephone line 5. And is diode 2
It is connected via 5. Then, at the time of incoming call or off-hook of the sub-phone 6, the switching relay 24 is switched to the b contact side, and the sub-phone 6 and the telephone line 5 are connected with the diode 25 passing therethrough.

Therefore, when the call signal of 16 Hz is transmitted from the exchange side in the communication standby state of the device and the call signal is detected twice, the slave telephone 6 and the telephone line 5 are connected via the diode 25. Connected. Therefore, since the ringing signal is input to the slave telephone 6 in a positive half-wave state, even if the slave telephone 6 has a tone ringer, it is sounded by the ringing signal twice. There is no such thing.

Therefore, there is no fear that the sub-telephone 6 will go off-hook based on the ringing of the sub-telephone 6 before the call is received. That is, the sub-phone 6 is sounded by the pseudo bell signal after it is determined that the calling side is not the facsimile machine but the telephone. Therefore, when the calling side is the facsimile machine, the sub-phone 6 is off-hooked based on the ringing. There is almost no danger of being lost. Therefore, it is possible to smoothly receive facsimile communication and telephone communication from the calling side.

When a facsimile transmission is performed from the facsimile apparatus main body 2, even if a dial key or the like (not shown) of the facsimile apparatus main body 2 is operated to make a call, the slave telephone 6 and the telephone line 5 are diode-connected. 25
Since the dial pulse signal is generated by the calling operation, the slave telephone 6 does not ring and no ringing occurs.

The present invention is not limited to the above embodiments, but can be embodied in the following modes. (1) When the call signal from the exchange side is detected, the TEL relay 22 is immediately switched to the b contact side so that the connection between the slave telephone 6 and the telephone line 5 is opened. Also in this case, since the switching relay 24 is arranged on the side of the a contact, the slave telephone 6 does not ring. (2) Set the number of times the switching signal is detected from the exchange side to a number other than 2. (3) Change the number of times a buzzer sound or pseudo bell signal is generated or the number of times a pseudo ringback tone is transmitted.

[0046]

As described in detail above, according to the present invention, even when a slave telephone having a tone ringer is connected,
It has an excellent effect that the ringing of the sub-phone by the calling signal from the exchange side can be surely prevented.

[Brief description of drawings]

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

FIG. 2 is a timing chart showing a receiving operation of the facsimile apparatus.

FIG. 3 is a flowchart showing a receiving operation of the facsimile device.

FIG. 4 is a flowchart showing a calling operation by a slave telephone of a facsimile apparatus.

FIG. 5 (a) is a waveform diagram showing a ringing signal from the exchange,
(B) is a waveform diagram showing a ringing signal that has passed through the diode and has become a positive half-wave.

[Explanation of symbols]

6 ... Sub-phone, 22 ... TEL relay, 24 ... Switching relay, 25 ... Diode as invalidating means.

Claims (1)

[Claims] 1. A facsimile machine in which a slave telephone can be connected and in which a connection between the slave telephone and a telephone line is closed in a communication standby state, when a call signal is transmitted from the exchange side, input to the slave telephone. Facsimile apparatus provided with invalidating means for invalidating a ringing signal to be stored.