JP3659434B2 - Facsimile device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a facsimile apparatus, and more particularly, to a facsimile apparatus that includes a telephone connected externally or built-in, and that prevents a malfunction during automatic switching operation of facsimile communication and conversation by the telephone by detecting a CNG signal.
[0002]
[Prior art]
  In recent years, facsimile machines have become smaller, lower cost, and have built-in telephone functions, so that they can be used as both facsimile machines and telephones by connecting to a single telephone line. It has come to be used in homes and small businesses. In such general households and small and medium-sized businesses, facsimile machines with a telephone function that do not have a new telephone line for a facsimile machine and are connected externally or have a built-in telephone machine are widely used. .
[0003]
  Such a facsimile apparatus with a built-in telephone or an external telephone has an automatic line switching function for automatically connecting a telephone line to the facsimile apparatus side when a CNG (Calling Tone) signal sent from the transmission side is detected. Built-in.
[0004]
  As a conventional automatic line switching method based on CNG signal detection, there is a call / communication automatic switching method in facsimile communication (see Japanese Patent Application No. 4-142146). In this case, there is an incoming call when the automatic response mode is set. When the tone detection state is entered, a timer is started. When a CNG signal is detected, a fax reception operation is performed. When a signal other than the CNG signal is detected, the timer is sounded and an off-hook operation is waited. When the facsimile apparatus side is off-hooked, a line is connected to the facsimile apparatus side, and when the telephone side is off-hooked, a line is connected to the telephone side.
[0005]
[Problems to be solved by the invention]
  However, in the conventional facsimile apparatus having the automatic line switching function, the line is connected to the facsimile apparatus side depending on whether a CNG signal sent from the transmission side is detected or a signal other than the CNG signal is detected. The CNG signal detection circuit in the facsimile apparatus malfunctions during a call with the other party telephone by a telephone built in or externally attached to the facsimile machine. There was a problem that the reception operation was started and the call was interrupted.
[0006]
  That is, since the CNG signal detection circuit is configured to detect a 1100 Hz signal that is a feature of the CNG signal, the 1100 Hz component contained in the voice coming from the microphone of the telephone or the surrounding environmental sound during a call is detected. If this is detected, this is erroneously detected as a CNG signal, and a facsimile reception operation is started, so that the telephone call is interrupted.
[0007]
  ThereAndBy providing a signal blocking means that blocks the signal of the same frequency as the tone signal for automatic switching between the automatic communication and the telephone call, the voice signal of the frequency included in the voice of the telephone call and the surrounding environmental sound during the telephone call. Facsimile device capable of making an appropriate call by preventing erroneous detection as a tone signal for automatic switching and automatic switchingIs provideding.According to this, when a telephone call is made in the telephone mode, that is, when there is no need to perform automatic switching, the sound quality of the telephone call sound is lowered by the signal blocking means.
[0008]
  Claim 1And to 2Described inventionIsIt is an object of the present invention to provide a facsimile apparatus that can prevent a voice quality of a telephone call from being deteriorated by a signal blocking means and can perform a conversation with a good sound quality.
[0009]
  Claim3SUMMARY OF THE INVENTION An object of the described invention is to provide a facsimile apparatus that can perform an appropriate call even when an external telephone is used.
[0010]
  Claim4SUMMARY OF THE INVENTION An object of the described invention is to provide a facsimile apparatus that can make an appropriate call even when a built-in telephone is used.
[0011]
[Means for Solving the Problems]
  According to a first aspect of the present invention, there is provided a facsimile apparatus comprising: a facsimile communication means for performing facsimile communication with a partner facsimile apparatus connected by a line; a telephone for performing a voice call with the other party via the line; A tone signal detecting means for detecting a tone signal sent from the other party via a line; a line switching means for selectively connecting the line to a facsimile communication means and the telephone; and an off-hook state of the telephone. Off-hook detection means for detecting, and after the off-hook detection means detects that there is an incoming call and the telephone is off-hook while the line is connected to the telephone by the line switching means, the tone detection means When a predetermined tone signal is detected from the telephone, the line is switched from the telephone to the facsimile by the line switching means. Is connected by switching the signal means, and control means for causing the facsimile reception, the facsimile apparatus having a,
  Between the telephone and the tone signal detecting meansProvidedCut off at least the same frequency signal as the predetermined tone signalThere is a function and the control means can control the validity / invalidity of the blocking function.Signal blocking meansAnd saidMode selection means for selecting a telephone mode that prioritizes telephone calls.And the control means disables the signal blocking means in a standby state, and disables the signal blocking means when a telephone mode is selected when there is an incoming call and the telephone goes off-hook. Continue and enable the signal blocking means if not selected,It is characterized by that.
[0012]
  Here, as the signal cut-off means, for example, a filter circuit that cuts off a frequency similar to a signal for automatic switching (for example, a CNG signal), for example, 1100 Hz is used.
[0013]
  According to the above configuration, when a telephone call is made in the telephone mode, that is, when automatic switching is not necessary, it is possible to prevent the sound quality of the telephone call sound from being lowered by the signal blocking means. Can talk with good sound quality.
[0014]
  Claim2The present invention includes a facsimile communication means for performing facsimile communication with a partner facsimile apparatus connected by a line, a telephone for performing a voice call with the partner via the line, and a partner via the line when an incoming call is received. Tone signal detecting means for detecting a tone signal sent from the line, line switching means for selectively connecting the line to a facsimile communication means and the telephone, and off-hook detecting means for detecting an off-hook state of the telephone The tone detecting means detects a predetermined tone signal from the line after the off-hook detecting means detects that there is an incoming call and the telephone is off-hook while the line is connected to the telephone by the line switching means. Is detected, the line switching means switches the line from the telephone to the facsimile communication means for connection. In the facsimile apparatus having a control means for causing the facsimile reception, the,
  Between the telephone and the tone signal detecting meansProvidedCut off at least the same frequency signal as the predetermined tone signalThere is a function and the control means can control the validity / invalidity of the blocking function.Signal blocking meansAnd theSetting means to set enable / disable of blocking functionAnd the control means sets the signal blocking means to be invalid in a standby state, and the signal blocking means is set when the setting means sets invalidity when there is an incoming call and the telephone is off-hook. The signal blocking means is enabled when the setting means is enabled.It is characterized by that.
[0015]
  According to the above configuration, the signal blocking function of the signal blocking unit can be appropriately set to valid / invalid according to the setting of the setting unit, and the sound quality of the call voice is improved while ensuring an appropriate automatic line switching operation. Can do.
[0016]
  SaidThe telephone may be an external telephone connected via a predetermined connection unit.thisAccordingly, even when an external telephone is used, an appropriate line automatic switching operation can be ensured, an appropriate call can be performed, and the sound quality of the call voice can be improved.
[0017]
  SaidThe telephone may be a built-in telephone built in the facsimile apparatus.thisAccordingly, even when the built-in telephone is used, it is possible to ensure an appropriate automatic line switching operation, perform an appropriate call, and improve the sound quality of the call voice.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. The embodiments described below are preferred embodiments of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is not limited to the following description. As long as there is no description which limits, it is not restricted to these aspects.
[0019]
  1 to 4 are diagrams showing a facsimile apparatus to which an embodiment of the facsimile apparatus of the present invention is applied. In FIG. 1, the facsimile apparatus 1 includes a network control unit 2, a control unit 3, an operation display unit 4, a plotter 5, a scanner 6, and the like, and each unit is connected to a bus 7.
[0020]
  An operation display unit (selection means, signal cut-off function selection means) 4 includes a numeric keypad, a start key, a mode selection key for selecting a telephone mode or a fax mode, and will be described later.1In addition to various operation keys such as a valid / invalid selection key for the functions of the 100 Hz cut filters 27 and 28 (see FIG. 2), a display (for example, a liquid crystal display) is provided, and various commands such as a transmission operation are issued from the operation keys. The contents of the command input from the operation keys and various information notified from the facsimile apparatus to the operator are displayed on the display. As the plotter 5, for example, a thermal recording device using a thermal element or an electrophotographic recording device or the like is used. When the thermal recording device is used, for example, the plotter 5 is directly applied to a thermal recording paper. Alternatively, an image is indirectly recorded on an ordinary recording sheet via an ink sheet. As the scanner 6, for example, an image scanner using a CCD (Charge Coupled Device) is used, and the scanner scans a document and reads image information of the document with a predetermined resolution.
[0021]
  As shown in FIG. 2, the network control unit 2 includes a DC detection unit 21, a hook switch 22, a relay 23, a transformer 24, a modem 25, a built-in telephone 26, 1100 Hz cut filters 27 and 28, a high impedance transformer 29, and a tone detection unit. 30 and a ringing signal detection unit 31, and an external telephone 41 is connected to the 1100 Hz cut filter 28 via a connection connector (connection unit) (not shown). Although not shown, the external telephone 41 includes a handset having a microphone and a speaker. The DC detection unit 21 is connected to the lines L1 and L2, and detects whether the modem 25, the built-in telephone 26, and the external telephone 41 are off-hook by detecting the DC currents of the lines L1 and L2. The off-hook detection signal is output to the control unit 3. The hook switch 22 operates under the control of the control unit 3 and off-hooks the built-in telephone 26. The relay 23 operates under the control of the control unit 3 to switch and connect the lines L1 and L2 to the modem 25 side and the external telephone 41 side. In the standby state, the relays L1 and L2 are connected to the external telephone 41. Connected to the side. The transformer 24 performs impedance matching between the lines L1 and L2 and the modem 25, and insulates between the lines L1 and L2 which are the primary side and the modem 25 which is the secondary side, while the lines L1 and L2 And the modem 25 exchange signals. The modem 25 modulates digital image information read by the scanner 6 and various protocol signals input from the control unit 3 into analog signals in order to transmit them on the lines L1 and L2, and from the other party to the line L1. The image information of the analog signal and various protocol signals sent via L2 are demodulated and converted into digital signals.
[0022]
  The extension telephone 26 is a telephone built in the facsimile apparatus 1 and includes a handset having a microphone and a speaker. The extension telephone 26 is connected to the hook switch 22 and the high impedance transformer 29 via a 1100 Hz cut filter (signal blocking means) 27.
[0023]
  1100Hz cutfillThe computer 27 cuts and outputs a signal component of 1100 Hz from the audio signal input from the microphone of the handset of the built-in telephone 26 and the surrounding environmental sound signal. The 1100 Hz cut filter (signal blocking means) 28 is connected between the external telephone 41 and the high-impedance transformer 29 connected via the connection connector, and is input from the microphone of the handset of the external telephone 41. The signal component of 1100 Hz is cut and output from the signal and the surrounding environmental sound signal. That is, the 1100 Hz cut filter 28 is connected between the connection connector for connecting the external telephone 41 and the high impedance 29, and cuts the signal component of 1100 Hz among the signals input from the microphone of the external telephone 41. To do.
[0024]
  The 1100 Hz cut filters 27 and 28 have a function of cutting the 1100 Hz signal component, which is set to be valid or invalid by the valid / invalid switching signal input from the control unit 3, and is built in when the function is invalid. The 1100 Hz signal component is output as it is without being cut from the voice signal input from the microphone of the handset of the telephone 26 or the external telephone 41 and the ambient environmental sound.
[0025]
  The high-impedance transformer 29 transmits signals to both sides while taking insulation between the lines L1 and L2 on the primary side and the tone detection unit 30 on the secondary side. The tone detector 30 is connected to the high impedance transformer 29, detects a tone signal on the lines L 1 and L 2 during a call using the internal telephone 26 or the external telephone 41, and outputs the detected signal to the controller 3. The ringing signal detector 31 is connected to the lines L1 and L2, detects the presence or absence of a ringing signal on the lines L1 and L2, and outputs the detection signal to the controller 3.
[0026]
  The control unit 3 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. In the ROM, a basic program as a facsimile machine and a filter valid / invalid switch according to the present invention are provided. A processing program and the like are stored. The RAM is used as a work memory, and a memory area for storing various data is formed. In the control unit 3, the CPU controls each unit in the facsimile apparatus 1 according to the program in the ROM, executes the sequence as the facsimile apparatus 1, and executes the filter valid / invalid switching process of the present invention.
[0027]
  That is, in the facsimile mode, the control unit 3 enables the 1100 Hz signal cut function of the 1100 Hz cut filters 27 and 28 in the network control unit 2 so that the audio signal input from the built-in telephone 26 or the external telephone 41 is processed. By cutting out and outputting the included 1100 Hz signal, erroneous detection of the CNG signal by the tone detector 30 is prevented, and in the case of the telephone mode, the 1100 Hz signal cut function of the 1100 Hz cut filters 27 and 28 is disabled and built-in. The 1100 Hz signal included in the audio signal input from the telephone 26 or the external telephone 41 is not cut, so that the audio signal during the call is prevented from being unnaturally transmitted to the other party.
[0028]
  Next, the operation will be described. When the facsimile apparatus 1 is set to the facsimile mode at the time of incoming call, the function of the 1100 Hz cut filters 27 and 28 is made effective, and the voice signal input from the microphone of the handset of the internal telephone 26 or the external telephone 41 In addition, by cutting and outputting the 1100 Hz signal component from the surrounding environmental sound, the erroneous detection of the CNG signal by the tone detection unit 30 is prevented, and when the telephone mode is set at the time of incoming call, the 1100 Hz cut filter 27, When a call is made by the internal telephone 26 or the external telephone 41 with the function 28 disabled, the 1100 Hz signal component is not cut from the voice signal input from the microphone of the handset or the surrounding environmental sound and is included in the user's voice. The 1100Hz signal is cut by the filter circuit, and the sound transmitted to the other party is Parts is obtained so as to prevent an unnatural.
[0029]
  Hereinafter, the filter valid / invalid switching process will be described based on the flowcharts shown in FIGS. 3 and 4. First, the filter valid / invalid switching process for controlling the validity / invalidity of the 1100 Hz cut filters 27 and 28 based on the setting state of the selection mode shown in FIG. 3 will be described below.
[0030]
  In the standby state, the facsimile apparatus 1 connects the lines L1 and L2 to the external telephone 41 side by the relay 23 and disables the functions of the 1100 Hz cut filters 27 and 28. In this standby state, the control unit 3 determines whether or not there is an incoming call by checking the detection of the ringing signals from the lines L1 and L2 by the ringing signal detection unit 31 in the network control unit 2 (step S1). If there is, it is checked whether or not the mode selection is set to the fax mode (facsimile mode) (step S2).
[0031]
  If the mode selection is selected as the fax mode, the control unit 3 starts a reception process based on the fax mode, performs a normal facsimile reception process, and ends the filter valid / invalid switching process (step S3).
[0032]
  When the fax mode is not selected in step S2, the control unit 3 monitors whether the extension telephone 26 or the external telephone 41 is off-hooked or the ringing signal continues (steps S4 and S5). If the ringing signal detection unit 31 does not detect the ringing signal in step S5 without performing the off-hook operation on the telephone 26 or the external telephone 41, it is determined that the other party has disconnected the lines L1 and L2, and continues. End the process and return to the standby state.
[0033]
  When the extension telephone 26 or the external telephone 41 is off-hooked in step S4, the control unit 3 starts CNG signal detection processing by the tone detection unit 30 (step S6), and checks whether the mode selection is selected as the telephone mode. (Step S7).
[0034]
  If the telephone mode is selected in step S7, that is, if it is not necessary to perform the automatic switching operation for connecting the lines L1 and L2 to the facsimile apparatus 2 side even if the CNG signal from the transmission side is detected, control is performed. The unit 3 proceeds to step S9 while disabling the functions of the 1100 Hz cut filters 27 and 28.
[0035]
  If the telephone mode is not selected in step S7, the functions of the 1100 Hz cut filters 27 and 28 are enabled (ON) (step S8), and the presence or absence of CNG signal detection by the tone detector 30 is confirmed (step S9). The tone detector 30 checks whether a CNG signal has been detected (step S9).
[0036]
  When the CNG signal is detected in step S9, the control unit 3 determines that the communication is facsimile communication, starts facsimile reception processing, performs normal facsimile reception processing, and ends filter valid / invalid switching processing ( Step S10).
[0037]
  If the tone detection unit 30 does not detect the CNG signal in step S9, the control unit 3 keeps the lines L1 and L2 connected to the extension telephone 26 or the external telephone 41 and keeps the extension telephone 26 or the external telephone 41. Check whether the tone detection unit 30 detects the CNG signal while the 1100 Hz cut filter 27 or the 1100 Hz cut filter 28 cuts the 1100 Hz signal component input from the extension telephone 26 or the external telephone 41 while securing the telephone call. At the same time, it is monitored whether the extension telephone 26 or the external telephone 41 is on-hooked (steps S9 and S11).
[0038]
  Therefore, the signal component of the same frequency (1100 Hz) as the CNG signal input from the microphone of the extension telephone 26 or the external telephone 41 is cut when a call is made using the extension telephone 26 or the external telephone 41. In the state, it is possible to make a call while checking whether the CNG signal is detected by the tone detection unit 30, and to detect the CNG signal reliably, and to use the extension telephone 26 or the external telephone 41. In a call, it is possible to prevent the tone detector 30 from erroneously detecting a sound signal having the same frequency as that of the CNG signal among the call sound and the surrounding environmental sound, so that the facsimile communication and the telephone 26 can be prevented. , 41 can be switched appropriately. As a result, in the middle of a call using the extension telephone 26 or the external telephone 41, it is erroneously switched to facsimile communication.GetCan be prevented, and an appropriate call can be made.
[0039]
  Thereafter, when the extension telephone 26 or the external telephone 41 is on-hooked in step S11 without detecting the CNG signal, the control unit 3 determines that the lines L1 and L2 have been disconnected, and switches the filter between valid / invalid. This process to end the process ends.
[0040]
  Next, filter valid / invalid switching processing for controlling validity / invalidity of the 1100 Hz cut filters 27 and 28 based on the filter valid / invalid setting state of the operation display unit 4 shown in FIG. 4 will be described below. In the description of FIG. 4, the same processing steps as those in FIG. 3 are denoted by the same step numbers, and detailed description thereof is omitted.
[0041]
  As described above, the facsimile machine 1 connects the lines L1 and L2 to the external telephone 41 side by the relay 23 in the standby state, and disables the functions of the 1100 Hz cut filters 27 and 28. Then, the control unit 3 checks whether or not there is an incoming call (step S1), and if there is an incoming call, it checks whether or not the mode selection is set to the fax mode (step S2).
[0042]
  When the mode selection is selected as the fax mode in step S2, the control unit 3 performs a normal facsimile reception process, ends the filter valid / invalid switching process (step S3), and is selected as the fax mode. If not, it is monitored whether the extension telephone 26 or the external telephone 41 is off-hook or the ringing signal continues (steps S4 and S5).
[0043]
  When the ringing signal detection unit 31 does not detect the ringing signal in step S5 without performing the off-hook operation on the extension telephone 26 or the external telephone 41, the control unit 3 ends the processing and enters a standby state. Returning to step S4, when the extension telephone 26 or the external telephone 41 is off-hooked, the CNG signal detection process by the tone detection unit 30 is started (step S6), and the 1100 Hz cut filters 27 and 28 are set to ON (enabled). Is checked (step S20).
[0044]
  When the function selection of the 1100 Hz cut filters 27 and 28 is set to ON (enabled) in step S20, the control unit 3 sets the 1100 Hz cut filters 27 and 28 to ON (enabled) (step S8), and the tone The detection unit 30 checks whether a CNG signal is detected (step S9).
[0045]
  When the function selection of the 1100 Hz cut filters 27 and 28 is set to OFF (invalid) in step S20, the control unit 3 proceeds to step S9 while disabling the functions of the 1100 Hz cut filters 27 and 28. The presence / absence of CNG signal detection by the tone detector 30 is confirmed (step S9).
[0046]
  Thereafter, as described above, when a CNG signal is detected in step S9, the control unit 3 determines that the communication is facsimile communication, starts facsimile reception processing, performs normal facsimile reception processing, and enables / disables the filter. The switching process is terminated (step S10).
[0047]
  If the tone detection unit 30 does not detect the CNG signal in step S9, the control unit 3 keeps the lines L1 and L2 connected to the extension telephone 26 or the external telephone 41 and keeps the extension telephone 26 or the external telephone 41. Whether the tone detector 30 detects the CNG signal while cutting the 1100 Hz signal component input from the extension telephone 26 or the external telephone 41 with the 1100 Hz cut filter 27 or the 1100 Hz cut filter 28 while securing the telephone call. A check is made and whether the extension telephone 26 or the external telephone 41 is on-hooked is monitored (steps S9 and S11).
[0048]
  Thereafter, when the extension telephone 26 or the external telephone 41 is on-hooked in step S11 without detecting the CNG signal, the control unit 3 determines that the lines L1 and L2 have been disconnected, and switches the filter between valid / invalid. This process to end the process ends.
[0049]
  Therefore, according to the setting content of the operation display unit 4, 1100 Hz is set to be valid / invalid, and the extension telephone 26 or the external telephone 41 is used when a call is made using the extension telephone 26 or the external telephone 41. In the state where the signal component of the same frequency (1100 Hz) as the CNG signal input from the microphone is cut, it is possible to make a call while checking whether the CNG signal is detected by the tone detection unit 30, and reliably The tone detector 30 can detect a signal having a frequency similar to that of the CNG signal in a call using the extension telephone 26 or the external telephone 41 and a surrounding environmental sound. It is possible to prevent erroneous detection as a signal, and to appropriately perform facsimile communication and telephone call by the telephones 26 and 41. Ri can be varied.
[0050]
  As a result, in the middle of a call using the extension telephone 26 or the external telephone 41, it is erroneously switched to facsimile communication.GetCan be prevented, and an appropriate call can be made.
[0051]
  The invention made by the present inventor has been specifically described based on the preferred embodiments. However, the present invention is not limited to the above, and various modifications can be made without departing from the scope of the invention. Needless to say.
[0052]
  For example, in the above embodiment, the case where the present invention is applied to a facsimile machine provided with both an extension telephone and an external telephone has been described. However, the present invention can be similarly applied to a facsimile machine provided with at least one.
[0053]
  In the above embodiment, the present invention is applied when switching between facsimile communication and telephone conversation using a CNG signal, and 1100 Hz, which is a signal similar to the CNG signal, is blocked as a signal blocking means 1100.HzThe cut filters 27 and 28 are provided.HzThe filter is not limited to a cut filter, and may cut not only 1100 Hz but also a signal having a frequency in the vicinity thereof. When switching between facsimile communication and telephone conversation using a signal other than the CNG signal, a signal having the same frequency as that of the signal is cut.
[0054]
【The invention's effect】
  Claim1According to the facsimile apparatus of the described invention, when a telephone call is performed in the telephone mode, that is, when it is not necessary to perform automatic switching, the signal blocking means prevents the sound quality of the telephone call sound from being deteriorated. Can talk with good sound quality.
[0055]
  Claim2According to the described invention, the signal blocking function of the signal blocking unit can be appropriately set to valid / invalid according to the setting of the setting unit, and the sound quality of the call voice is improved while ensuring the appropriate automatic line switching operation. be able to.
[0056]
  Claim3According to the described invention, even when an external telephone is used, it is possible to ensure an appropriate line automatic switching operation, perform an appropriate call, and improve the sound quality of the call voice. Can do.
[0057]
  Claim4According to the described invention, even when a built-in telephone is used, it is possible to ensure an appropriate line automatic switching operation, perform an appropriate call, and improve the sound quality of the call voice. it can.
[Brief description of the drawings]
[Figure 1] Main departureLight1 is a circuit block diagram of a facsimile apparatus according to an embodiment applied.
FIG. 2 is a circuit block diagram in the network control unit of FIG. 1;
FIG. 3 is a flowchart of filter valid / invalid switching processing based on mode setting by the facsimile apparatus according to the embodiment.
FIG. 4 is a flowchart of a filter valid / invalid switching process based on a valid / invalid setting state by the facsimile apparatus according to the embodiment.
[Explanation of symbols]
1 Facsimile device
2 Network control unit
3 Control unit
4 Operation part
5 Plotter
6 Scanner
7 Display section
8 Bus
21 DC detector
22 Hook switch
23 Relay
24 transformer
25 Modem
26 Built-in telephone
27, 28 1100Hz cut filter
29 High impedance transformer
30 Tone detector
31 Ringing signal detector
41 External telephone

Claims (4)

Facsimile communication means for performing facsimile communication with a partner facsimile apparatus connected by a line, a telephone for performing a voice call with the other party via the line, and a call sent from the other party via the line when an incoming call is received Tone signal detecting means for detecting a tone signal, line switching means for selectively connecting the line to a facsimile communication means and the telephone, off-hook detecting means for detecting an off-hook state of the telephone, and the line switching means In the state where the line is connected to the telephone, there is an incoming call, and after the off-hook detecting means detects that the telephone is off-hook, the tone detecting means detects a predetermined tone signal from the line, The line switching means switches the line from the telephone to the facsimile communication means and connects them. And control means for causing the reception, the facsimile apparatus having a,
A signal cutoff provided between the telephone and the tone signal detection means, which has a function of cutting off a signal having the same frequency as at least the predetermined tone signal, and enabling / disabling of the cutoff function can be controlled by the control means. And a mode selection means for selecting a telephone mode for giving priority to a telephone call by the telephone , wherein the control means sets the signal blocking means to be invalid in a standby state, A facsimile apparatus characterized in that when the telephone mode is selected when the telephone is off-hooked, the signal blocking means is continuously disabled, and when the telephone mode is not selected, the signal blocking means is enabled . Facsimile communication means for performing facsimile communication with a partner facsimile apparatus connected by a line, a telephone for performing a voice call with the other party via the line, and a call sent from the other party via the line when an incoming call is received Tone signal detecting means for detecting a tone signal, line switching means for selectively connecting the line to a facsimile communication means and the telephone, off-hook detecting means for detecting an off-hook state of the telephone, and the line switching means In the state where the line is connected to the telephone, there is an incoming call, and after the off-hook detecting means detects that the telephone is off-hook, the tone detecting means detects a predetermined tone signal from the line, The line switching means switches the line from the telephone to the facsimile communication means and connects them. And control means for causing the reception, the facsimile apparatus having a,
A signal cutoff provided between the telephone and the tone signal detection means, which has a function of cutting off a signal having the same frequency as at least the predetermined tone signal, and enabling / disabling of the cutoff function can be controlled by the control means. And a setting means for setting validity / invalidity of the blocking function. The control means sets the signal blocking means to be invalid in a standby state, and when the incoming call is received and the telephone is off-hooked, the control means A facsimile apparatus , wherein invalidation of the signal blocking means is continued when invalidity is set by a setting means, and the signal blocking means is validated when validity is set by the setting means . The telephone, a facsimile machine according to claim 1 or claim 2 including the external telephone connected through a predetermined connection portion. The phone, the facsimile apparatus according to claim 1 including a built-in internal phone, facsimile machine according to claim 2 or claim 3.

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