JP2003008854A - Facsimile equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide small-sized, inexpensive facsimile equipment which surely detect a signal of 1,300 Hz of a facsimile network. SOLUTION: The facsimile equipment 1 is connected to a public network and has a signal amplifier 14, which detects the voltage variation of at least the line, and a voltage-frequency converting circuit 15, which performs the frequency conversion of the voltage variations detected by the amplifier 14 and outputs the result on its primary side and a DAA 2, having at least a modem 3 for modulating and demodulating communication data, and a tone decoder 4 for recognizing the frequency converted by the conversion part on its secondary side and performs facsimile communication via the secondary-side modem 3. The facsimile equipment 1 recognizes the frequency that the signal amplifier 14 detects and the voltage-frequency converting circuit 15 converts by the tone decoder 4 and detects the 1,300 Hz signal of the facsimile network.

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 small and inexpensive facsimile machine that reliably detects a 1300 Hz signal in a facsimile network.

[0002]

2. Description of the Related Art In recent years, a facsimile network (F network) that allows a facsimile machine to receive an incoming call with a signal of 1300 Hz has appeared in response to the spread of facsimile machines and the development of lines, and the facsimile machines also support this facsimile network. As described above, a facsimile machine that receives an incoming call with a signal of 1300 Hz has appeared.

A facsimile machine is connected to a PSTN (general public line) via an adapter, and when a ringing signal comes from the PSTN, the adapter automatically receives a call.
The adapter monitors the CNG signal to determine if the calling party is a telephone or a fax machine. When the adapter detects the CNG signal from the PSTN, it determines that the calling side is a facsimile machine and sends a 1300 Hz signal to the facsimile machine. When the facsimile machine receives a 1300 Hz signal from the adapter,
Incoming call processing is performed in the same manner as when receiving an ordinary incoming call (Japanese Patent Laid-Open No. 8-30
7552, etc.).

Conventionally, a facsimile network 1300 has been used.
A network control unit of a facsimile apparatus having a function of receiving Hz mainly uses an insulator such as a transformer to insulate the primary side and the secondary side and transmits a signal to the secondary side.

[0005]

However, in such a conventional facsimile apparatus, the network control section thereof mainly uses an insulator such as a transformer to insulate the primary side and the secondary side from each other. Therefore, there is a problem that the mounting area of the transformer is large and the facsimile apparatus itself becomes large.

If the telephone is set to be preferentially connected to the telephone when the telephone is connected, 130
There was a problem that it was not possible to detect 0 Hz and the usability was poor.

Therefore, the invention according to claim 1 is connected to a line, and the primary side thereof has at least a voltage fluctuation detecting unit for detecting a voltage fluctuation of the line and a frequency fluctuation of the voltage fluctuation detected by the voltage fluctuation detecting unit. The secondary side modem is provided with a communication control section having a conversion section for outputting and outputting, and a secondary side thereof has at least a modem for modulating / demodulating communication data and a frequency recognition section for recognizing the converted frequency of the conversion section. When performing facsimile communication via the, the frequency recognizing unit detects the frequency fluctuation detecting unit and the frequency recognizing unit converts the converted frequency, and the 1300 Hz signal of the facsimile network is detected. Net (F
It is an object of the present invention to provide a small-sized and inexpensive facsimile apparatus capable of receiving a 1300 Hz signal of a network) and reliably receiving a 1300 Hz signal of a facsimile network.

The invention according to claim 2 is connected to a line,
The primary side thereof has at least a voltage fluctuation detecting section for detecting a voltage fluctuation of the line and a converting section for frequency-converting and outputting the voltage fluctuation detected by the voltage fluctuation detecting section, and at least the communication side thereof has a secondary side. A communication control unit having a modem for performing data modulation / demodulation and a frequency recognition unit for recognizing the converted frequency of the conversion unit, and the line provided on the primary side of the communication control unit is switched between the modem side and the telephone side for connection. A switching unit is provided, and facsimile communication is performed via the modem on the secondary side. Even when the facsimile communication and the voice call using the telephone are automatically switched, the telephone is preferentially connected. , The frequency recognizing unit recognizes the frequency detected by the voltage fluctuation detecting unit and converted by the converting unit,
By detecting the 1300 Hz signal of the facsimile network, it becomes possible to receive the 1300 Hz signal of the facsimile network (F network) even when the telephone connected in parallel with the facsimile is in the priority connection state. SUMMARY OF THE INVENTION It is an object of the present invention to provide a small-sized and inexpensive facsimile apparatus capable of reliably receiving a 1300 Hz signal from a facsimile network.

According to a third aspect of the invention, which is provided on the secondary side, the power supply to each main part of the facsimile apparatus is stopped during a predetermined standby state to shift to the energy saving mode, and the power is supplied also in the energy saving mode. When the predetermined energy saving mode release factor occurs, the energy saving control means for canceling the energy saving mode has a built-in frequency recognition unit for recognizing the converted frequency of the conversion unit, and the built-in frequency recognition for the energy saving mode. When the unit detects the 1300 Hz signal of the facsimile network, it cancels the energy saving mode so that the miniaturized DAA can detect the 1300 Hz signal of the facsimile network (F network) even in the energy saving mode. More surely 130 of the facsimile network
It is an object of the present invention to provide a small-sized and inexpensive facsimile apparatus capable of receiving a 0 Hz signal.

[0010]

According to a first aspect of the present invention, there is provided a facsimile apparatus which is connected to a line and has a voltage fluctuation detecting section for detecting at least a voltage fluctuation of the line and a voltage fluctuation detecting section on the primary side thereof. A communication control unit having a conversion unit for frequency-converting and outputting the detected voltage fluctuation, and having a frequency recognizing unit for recognizing the converted frequency of the modem and at least a modem for modulating / demodulating communication data on its secondary side. A facsimile device for performing facsimile communication via the secondary side modem, wherein the frequency recognizing unit recognizes the frequency detected by the voltage fluctuation detecting unit and converted by the converting unit, The above object is achieved by detecting a signal of 1300 Hz.

According to the above construction, the voltage fluctuation detecting section connected to the line and detecting at least the voltage fluctuation of the line and the voltage fluctuation detected by the voltage fluctuation detecting section are frequency-converted and output to the primary side thereof. A communication control section having a conversion section, a modem for performing modulation / demodulation of communication data and a frequency recognition section for recognizing the converted frequency of the conversion section on the secondary side, and a facsimile via the modem on the secondary side. At the time of communication, the frequency fluctuation detecting unit detects the frequency converted by the converting unit by the frequency recognizing unit and detects the 1300 Hz signal of the facsimile network. Therefore, the facsimile network (F network) is downsized by the DAA. Facsimile apparatus capable of receiving an incoming 1300 Hz signal of a facsimile network and reliably receiving an incoming 1300 Hz signal of a facsimile network It can be made small in size and inexpensive.

According to another aspect of the present invention, a facsimile apparatus is connected to a line, and a voltage fluctuation detecting unit for detecting a voltage fluctuation of the line at least on the primary side thereof and a voltage fluctuation detected by the voltage fluctuation detecting unit. A communication control unit having a conversion unit for frequency-converting and outputting the frequency, and a secondary side thereof having at least a modem for modulating and demodulating communication data and a frequency recognition unit for recognizing the converted frequency of the conversion unit; A switching unit which is provided on the primary side of the control unit and which switches and connects the line to the modem side and the telephone side;
A facsimile device for performing facsimile communication via the secondary modem and automatically switching between the facsimile communication and a voice call using the telephone,
Even in the state where the telephone is preferentially connected, the frequency recognizing unit detects the frequency detected by the voltage fluctuation detecting unit and the frequency recognizing unit recognizes the converted frequency.
The above object is achieved by detecting the Hz signal.

According to the above configuration, the voltage variation detecting section connected to the line and detecting at least the voltage variation of the line and the voltage variation detected by the voltage variation detecting section are frequency-converted and output to the primary side. A conversion control unit having a conversion unit, a secondary side thereof having at least a modem for modulating / demodulating communication data and a frequency recognition unit recognizing the converted frequency of the conversion unit, and a communication control unit provided on the primary side of the communication control unit. A switching unit for switching the line between the modem side and the telephone side for connection, and performing facsimile communication via the secondary side modem, and automatically switching between the facsimile communication and voice call using the telephone. In this case, even when the telephone is preferentially connected, the frequency recognition section detects the frequency detected by the voltage fluctuation detection section and the frequency recognition section recognizes the converted frequency. Since the 0 Hz signal is detected, even if the telephone connected in parallel with the facsimile is in the priority connection state, it is possible to receive the 1300 Hz signal of the facsimile network (F network), and reliably. A facsimile device capable of receiving a 1300 Hz signal of a facsimile network can be made small and inexpensive.

In each of the above cases, for example, as described in claim 3, the facsimile machine stops the power supply to each main part of the facsimile machine during a predetermined standby state and shifts to the energy saving mode. Power is supplied and operates even in energy saving mode,
When a predetermined energy-saving mode release factor occurs, an energy-saving control unit that releases the energy-saving mode is provided on the secondary side, and the energy-saving control unit has a built-in frequency recognition unit that recognizes the frequency converted by the conversion unit. In the energy saving mode, when the built-in frequency recognition unit detects a 1300 Hz signal of the facsimile network, the energy saving mode may be canceled.

According to the above-mentioned structure, the power supply to the main parts of the facsimile apparatus is provided at the secondary side to stop the power supply to the energy saving mode during a predetermined standby time, and the power is supplied also to the energy saving mode. When it operates and a predetermined energy saving mode release factor occurs, the energy saving control means that releases the energy saving mode,
A frequency recognition unit that recognizes the converted frequency of the conversion unit is built in, and when the built-in frequency recognition unit detects a 1300 Hz signal of the facsimile network in the energy saving mode,
Since the energy saving mode is canceled, the 1300 Hz signal of the facsimile network (F network) can be detected by the downsized DAA even in the energy saving mode, and the 1300 Hz signal of the facsimile network can be more reliably received. The facsimile device can be made small and inexpensive.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below are preferred embodiments of the present invention, and therefore have various technically preferable limitations. However, the scope of the present invention refers to the present invention particularly in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

1 to 4 are views showing an embodiment of a facsimile apparatus of the present invention, and FIG. 1 is a main circuit of a facsimile apparatus 1 to which an embodiment of the facsimile apparatus of the present invention is applied. It is a block diagram.

Referring to FIG. 1, the facsimile machine 1 has a D
DA (Digital Access Arrangement) 2, modem 3, tone decoder 4, energy-saving CPU (Central Processing U)
nit) 5 and main control unit 6 etc., and DDA (Digita
l Access Arrangement 2 includes a primary side circuit 10, an insulating element 11 and a secondary side circuit 12, and the primary side circuit 10 includes a relay 13, a signal amplifier 14, a voltage frequency conversion circuit 15 and other primary side circuits. 16 and so on.

Primary side circuit 10 of DAA (communication control unit) 2
Is connected to a public line network and operates by station power supply from the public line network. The primary side circuit 10 of the DAA 2 has its relay 13 and other primary side circuits 16 connected to the public line network. The relay 13 is connected to the telephone 20 in parallel with the facsimile device 1 and also to the signal. The amplifier 14 is connected. The relay (switching unit) 13 functions as a connection switching unit that switches the public line network between the telephone 20 and the signal amplifier 14 under the control of the main control unit 6. The signal amplifier (voltage fluctuation detection unit) 14 amplifies the voltage fluctuation input from the public line network via the relay 13 and outputs it to the voltage frequency conversion circuit 15, and the voltage frequency conversion circuit (conversion unit) 15 outputs the signal. The voltage fluctuation input from the amplifier 14 is frequency-converted and output to the secondary side circuit 12 of the DAA 2 and the tone decoder 4 via the insulating element 12.

The tone decoder (frequency recognizing unit) 4 constantly monitors the voltage fluctuation of the public line network based on the frequency conversion signal input from the voltage frequency conversion circuit 15 via the insulating element 11, and detects from the public line network. Facsimile network (F network)
1300 Hz, the signal of this frequency is detected and the detection result is output to the main controller 6. Main control unit 6
When a detection signal indicating that the F network of 1300 Hz is detected is input from the tone decoder 4, the DAA 2 is off-hooked and the facsimile main body is connected to the public line network.

The DAA 2 controls the entire communication network, and the modem 3 operates under the control of the main control unit 6 to modulate a transmission signal and demodulate a reception signal.

The insulating element 11 provides impedance matching between the public line network and the secondary side circuit 12, and also provides insulation between the primary side circuit 10 and the secondary side circuit 12.
Signals are exchanged between the primary circuit 10 and the secondary circuit 12.

An energy-saving CPU (energy-saving control means) 5 monitors the operation of each part of the facsimile device 1 during standby and also shifts to an energy-saving mode (energy saving mode) by an operation display unit (not shown) of the facsimile device 1. The operation of the energy-saving key that is instructed is monitored, and the power supply (for example, 5V) to the main control unit 6 is stopped at a predetermined time, and the power is supplied only to the energy-saving CPU 5 of the facsimile apparatus 1 so that the DAA 2 Energy-saving processing is performed by operating the primary side circuit 10 with station power supply to stop the supply of power to other parts, and a request for canceling energy-saving such as key operation of the operation display part and public network F network 1300
When there is a signal of Hz, the supply of 5V power to the main control unit 5 is restarted, and the supply of power to each unit that has stopped the power supply is restarted. That is, in the energy saving mode, power is supplied only to the energy saving CPU 5, and power is supplied to the main control unit 5, the secondary circuit 12 of the DAA 2, the modem 3, and other units (not shown) such as the operation display unit, plotter, and scanner. The supply is stopped, and the primary side circuit 10 of the DAA 2 is operated by the station power supply from the public line network. Although not shown, the energy-saving CPU 5 has a built-in tone decoder (frequency recognition unit), and the tone decoder of the energy-saving CPU 5 supplied with power in the energy-saving mode detects 1300 Hz of the F network from the public network. , Cancel the energy saving mode.

Next, the operation of this embodiment will be described. In the facsimile device 1 of the present embodiment, first, as shown in FIG. 2, the tone decoder 4 operates on the public line network based on the frequency conversion signal input from the voltage frequency conversion circuit 15 via the insulating element 11. The voltage fluctuation is constantly monitored, and it is checked whether 1300 Hz of the F network is received from the public line network (step S101). When 1300 Hz is detected, the detection result is output to the main control unit 6, and the main control unit 6 The main body of the facsimile is off-hook (step S102). When the facsimile device 1 goes off hook, the facsimile device 1 starts a normal facsimile reception process (step S103).

As described above, the facsimile apparatus 1 of the present embodiment is connected to the public line network, and the primary side thereof has at least the signal amplifier 14 for detecting the voltage fluctuation of the line and the voltage detected by the signal amplifier 14. A voltage-frequency conversion circuit 15 for frequency-converting fluctuations and outputting the frequency-changed signal is provided, and a tone decoder 4 for recognizing the converted frequency of at least a modem 3 for modulating / demodulating communication data on its secondary side and a converter.
When the facsimile communication is performed via the modem 3 on the secondary side, the tone decoder 4 recognizes the frequency converted by the voltage frequency conversion circuit 15 and recognizes the frequency converted by the voltage frequency conversion circuit 15. Signal is being detected.

Therefore, the downsized DAA 2 can be used to receive the 1300 Hz signal of the facsimile network (F network), and the facsimile network 130 can be reliably transmitted.
The facsimile device 1 capable of receiving 0 Hz signals can be made small and inexpensive.

Further, as shown in FIG. 3, the facsimile apparatus 1 has a telephone 20 connected in parallel with the facsimile side via a relay 13 which is a connection switching unit, and the signal from the line is 1300 Hz. The processing is appropriately switched depending on whether it is CNG which is a normal facsimile communication signal.

That is, in the facsimile apparatus 1, when the telephone 20 side is preferentially connected to the public line network and the 1300 Hz signal of the F network is input from the public line network, it is shown in FIG. 1300 of F network
The Hz signal is detected (step S201), and the relay 13 is switched to the facsimile side (step S20).
2) Take the facsimile off-hook (step S2)
03), normal facsimile reception processing is started (step S204).

When the telephone 20 side is preferentially connected to the public line network and there is a ringing signal (step S205), whether the CNG (calling tone), which is a normal facsimile communication signal, is received. If you check (step S206) and do not receive CNG,
Off-hooking the telephone 20 enables a conversation using the telephone 20 (step S207).

In step S206, when the telephone set 20 receives CNG which is a normal facsimile communication signal, the telephone set 20 sends a DTMF signal to the tone decoder 4 notifying that the CNG has been received (step S208), and the tone signal is transmitted. When the decoder 4 detects the DTMF signal (step S
209), the relay 13 that is the connection switching unit is switched to the facsimile side (step S202), the facsimile is taken off-hook (step S203), and normal facsimile communication is performed (step S204).

Further, the facsimile apparatus 1 of the present embodiment
Is connected to a public line network, and at its primary side, a signal amplifier 14 for detecting at least a voltage change in the public line network and a voltage frequency conversion circuit 15 for frequency-converting and outputting the voltage change detected by the signal amplifier 14. And a tone decoder 4 for recognizing the converted frequency of at least the modem 3 and the voltage frequency conversion circuit 15 for modulating / demodulating communication data, and a line provided on the primary side of the DDA 2 on the secondary side thereof. A relay 13 is provided which is switched between the modem 3 side and the telephone 20 side for connection, and performs facsimile communication via the modem 3 on the secondary side, and performs the facsimile communication and a voice call using the telephone 20. At the time of automatic switching, even when the telephone 20 is preferentially connected, the signal amplifier 14 detects and changes the voltage frequency conversion circuit 15. Recognizes the frequency tone decoder 4, and detects the signal of 1300Hz facsimile network.

Therefore, even when the telephone set 20 connected in parallel with the facsimile is in the priority connection state, the 1300 Hz signal of the facsimile network (F network) can be received, and the facsimile network can be reliably received. Of 130
The facsimile device 1 capable of receiving 0 Hz signals can be made small and inexpensive.

Further, the facsimile apparatus 1 has an energy saving C
Power is supplied only to PU5, and the primary side circuit 1 of DAA2
4 has an energy saving mode in which 0 is operated by local power supply and power supply to other parts is stopped. In this energy saving mode, the energy saving CPU 5 to which power is supplied also has a built-in tone decoder and is shown in FIG. Energy-saving CPU
1300 of F network from public line network with 5 tone decoder
Detect Hz.

That is, as shown in FIG. 4, in the energy saving mode, the energy saving CPU 5 checks whether the tone decoder of the energy saving CPU 5 to which power is supplied also detects 1300 Hz from the public line network even in this energy saving mode (step (S301), when the tone decoder of the energy-saving CPU 5 detects 1300 Hz, the energy-saving mode is canceled (step S302), and the tone decoder 4 outputs 13
Check if 00Hz is detected (step S30
3).

The facsimile apparatus 1 operates in step S303.
Then, when the tone decoder 4 does not detect 1300 Hz, it is determined that there is no incoming call on the F network, the mode shifts to the energy saving mode again, and the same processing as described above is performed (step S30).
4).

When the tone decoder 4 detects 1300 Hz in step S303, the facsimile machine 1 takes the facsimile off-hook (step S305),
Normal facsimile reception processing is started (step S3).
06).

As described above, the facsimile apparatus 1 according to the present embodiment is provided on the secondary side, stops the power supply to each main part of the facsimile apparatus 1 during a predetermined standby state, and shifts to the energy saving mode. When the power is supplied and operates even in the energy saving mode and a predetermined energy saving mode release factor occurs, the energy saving CPU 5 that releases the energy saving mode causes the voltage frequency conversion circuit 15 to operate.
Built-in tone decoder that recognizes the converted frequency of
When the built-in tone decoder detects the 1300 Hz signal of the facsimile network in the energy saving mode (energy saving mode), the energy saving mode is released.

Therefore, even in the energy saving mode, the downsized DAA 2 can detect the 1300 Hz signal of the facsimile network (F network), and the facsimile apparatus can more reliably receive the 1300 Hz signal of the facsimile network. 1 can be made small and inexpensive.

The invention made by the present inventor has been specifically described based on the preferred embodiments, but the present invention is not limited to the above, and various modifications can be made without departing from the scope of the invention. It goes without saying that it is possible.

[0040]

According to the facsimile apparatus of the invention described in claim 1, the voltage fluctuation detecting section which is connected to the line and detects the voltage fluctuation of at least the voltage on the primary side, and the voltage fluctuation detecting section detects the voltage fluctuation. The communication control unit has a conversion unit that frequency-converts and outputs voltage fluctuations, and a secondary side thereof includes a modem that performs modulation / demodulation of communication data and a frequency recognition unit that recognizes the converted frequency of the conversion unit. When performing facsimile communication via the secondary modem, the frequency recognition unit detects the frequency fluctuation detected by the voltage fluctuation detection unit and the frequency recognition unit recognizes the converted frequency.
Since the z signal is detected, the 1300 Hz signal of the facsimile network (F network) can be received by the downsized DAA, and the 1300 Hz of the facsimile network can be reliably achieved.
A facsimile device that can receive an Hz signal can be made small and inexpensive.

According to the second aspect of the present invention, the facsimile apparatus is connected to a line, and the primary side thereof has at least a voltage fluctuation detecting unit for detecting a voltage fluctuation of the line and a voltage fluctuation detected by the voltage fluctuation detecting unit. And a communication control section having a conversion section for frequency-converting and outputting the frequency and a frequency recognition section for recognizing the converted frequency of the conversion section and a modem for modulating / demodulating communication data on the secondary side thereof, and the communication control. A switching unit which is provided on the primary side of the unit to switch and connect the line between the modem side and the telephone side, and performs facsimile communication through the modem on the secondary side and uses the facsimile communication and the telephone. When automatically switching between a voice call and a voice call, even when the telephone is preferentially connected, the frequency recognition unit detects the frequency detected by the voltage fluctuation detection unit and converted by the frequency recognition unit. Identifies, of facsimile network 1300H
Since the z signal is detected, even if the telephone connected in parallel with the facsimile is in the priority connection state, it is possible to receive the 1300 Hz signal of the facsimile network (F network), and reliably. Facsimile network 1300
A facsimile device that can receive an Hz signal can be made small and inexpensive.

According to the third aspect of the present invention, the facsimile apparatus is provided on the secondary side, the power supply to the main parts of the facsimile apparatus is stopped in a predetermined standby state, and the energy saving mode is entered. Even when the power is supplied and operated, and when a predetermined energy saving mode release factor occurs, the energy saving control means for canceling the energy saving mode has a built-in frequency recognition unit that recognizes the frequency converted by the conversion unit, and in the energy saving mode,
The built-in frequency recognition unit is a facsimile machine 1300.
When the Hz signal is detected, the energy saving mode is canceled. Therefore, even in the energy saving mode, the downsized DAA can detect the 1300 Hz signal of the facsimile network (F network), and the 1% of the facsimile network can be more reliably established.
A facsimile device capable of receiving a 300 Hz signal can be made small and inexpensive.

[Brief description of drawings]

FIG. 1 is a circuit block diagram of a main part of a facsimile apparatus to which an embodiment of a facsimile apparatus of the present invention is applied.

2 is an F network 1 of DAA of the facsimile apparatus of FIG.
The flowchart which shows a 300 Hz detection process.

FIG. 3 is a flowchart showing a facsimile incoming call detection process in the telephone priority state by the facsimile apparatus of FIG.

[Fig. 4] F in the energy saving mode of the facsimile apparatus of Fig. 1.
The flowchart which shows the 1300 Hz detection process of a network.

[Explanation of symbols]

1 Facsimile machine 2 DAA 3 modem 4 tone decoder 5 energy-saving CPU 6 Main control unit 10 Primary circuit 11 Insulation element 12 Secondary circuit 13 relays 14 Signal amplifier 15 Voltage frequency conversion circuit 16 Other primary side circuits 20 telephones

Claims (3)

[Claims] 1. A voltage fluctuation detecting section which is connected to a line and whose primary side detects at least a voltage fluctuation of the circuit and a conversion section which frequency-converts and outputs the voltage fluctuation detected by the voltage fluctuation detecting section. However, the secondary side is provided with a communication control section having at least a modem for modulating / demodulating communication data and a frequency recognizing section for recognizing the frequency converted by the converting section, and performing facsimile communication via the modem on the secondary side. A facsimile apparatus for performing the above, wherein the frequency recognition section detects the frequency and the frequency converted by the conversion section is recognized by the frequency recognition section, and detects a 1300 Hz signal of a facsimile network. 2. A voltage fluctuation detecting section that is connected to a line and that detects a voltage fluctuation of the line and a converting section that frequency-converts and outputs the voltage fluctuation detected by the voltage fluctuation detecting section. Then, on the secondary side thereof, a communication control unit having at least a modem for performing modulation / demodulation of communication data and a frequency recognition unit for recognizing the converted frequency of the conversion unit,
A switching unit that is provided on the primary side of the communication control unit and switches and connects the line between the modem side and the telephone side, and performs facsimile communication via the secondary side modem, and the facsimile. A facsimile device for automatically switching between communication and voice communication using the telephone, and even in a state where the telephone is preferentially connected, the frequency detected by the voltage fluctuation detection unit and converted by the conversion unit. Is recognized by the frequency recognition unit, and the
A facsimile machine characterized by detecting a 00 Hz signal. 3. The facsimile apparatus stops the power supply to each main part of the facsimile apparatus during a predetermined standby state to shift to an energy saving mode, and is also supplied with power during the energy saving mode to operate to a predetermined state. When an energy saving mode release factor occurs, an energy saving control means for canceling the energy saving mode is provided on the secondary side, and the energy saving control means has a built-in frequency recognition section for recognizing the frequency converted by the conversion section, 3. The facsimile apparatus according to claim 1, wherein when the built-in frequency recognition unit detects a 1300 Hz signal of the facsimile network in the energy saving mode, the energy saving mode is canceled.