JP4981465B2 - Intercom system, intercom master unit and fire alarm - Google Patents

Description

  The present invention relates to an interphone system, an interphone master unit used for the interphone system, and a fire alarm.

  Conventionally, there has been a security hands-free phone that is connected to a sensor for detecting an abnormality such as a fire and outputs an alarm sound when a detection signal is received from the sensor (see, for example, Patent Document 1). This security hands-free phone is connected to a doorphone slave unit that has a call button and is arranged at the entrance, and a fire detector that detects, for example, a fire. A call circuit, an alarm unit that receives a detection signal from a fire detector and outputs an alarm sound, a signal processing unit that processes a signal from each circuit, a speaker that outputs sound, and a speaker A switch for switching connection to the alarm unit, a call detection circuit for detecting a call signal from the door phone slave unit, and a chime sound generating circuit for generating a chime sound from the speaker are provided.

In this security hands-free phone, when the call button of the door phone slave unit is operated, the call detection circuit detects the call signal from the door phone slave unit, and the signal processing unit controls the chime sound generating circuit to generate the chime sound. , Chime sound is output through the speaker. On the other hand, when a detection signal from the fire detector is input to the alarm unit, the signal processing unit controls the switch to switch the speaker to the alarm unit, and an alarm sound is output through the speaker.
JP-A-8-70361 (pages 3 to 4 and FIGS. 1 to 3)

  In the security hands-free phone shown in Patent Document 1 above, when the fire detector detects a fire, the fire detector transmits a detection signal to the security hands-free phone, and the security hands-free phone receives the detection signal. Output alarm sound. However, when calling from the doorphone slave unit, the fire detector was not used as part of the system, and only a chime sound was output from the security hands-free phone. Therefore, when a fire detector is installed but away from the security hands-free phone, the chime sound is not heard and the customer may not notice.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an interphone system that outputs a notification sound from a fire alarm device, an interphone master device used for the interphone system, and a fire alarm device. It is in.

  The invention of claim 1 has a fire alarm and an interphone master connected to the fire alarm, the interphone master being a detection signal receiving unit for receiving a detection signal from the fire alarm, A fire alarm is provided with a warning notification unit that notifies a warning when the detection signal receiving unit receives the detection signal, and a notification sound signal transmission unit that transmits a notification sound signal for outputting a notification sound from the fire alarm to the fire alarm. The alarm device includes a fire detection unit that detects a fire, a detection signal transmission unit that transmits a detection signal to the interphone base unit when the fire detection unit detects a fire, and a notification sound that receives a notification sound signal from the interphone base unit. A signal receiving unit and a notification output unit that outputs an alarm when the fire detecting unit detects a fire and outputs a notification sound when the notification sound signal receiving unit receives the notification sound signal are provided.

  According to a second aspect of the present invention, there is provided an interphone slave unit that outputs a call signal to the interphone master unit when the call button is pressed, and the interphone master unit includes a call signal receiving unit that receives a call signal from the interphone slave unit. The notification sound signal transmission unit transmits a notification sound signal to the fire alarm device when the call signal reception unit receives the call signal.

  The invention of claim 3 includes a plurality of fire alarms, and the intercom master unit has a transmission setting unit for setting necessity of transmission of the notification sound signal for each fire alarm. A notification sound signal transmission unit transmits a notification sound signal to a fire alarm set as requiring transmission.

  The invention of claim 4 is provided with a plurality of fire alarms, each of which has an output setting unit for setting the operation at the time of notification sound signal input to either an output mode for outputting a notification sound or a non-output mode for not outputting a notification sound. Provided in the fire alarm, each fire alarm is set to the non-output mode by the output setting unit, the notification output unit does not output the notification sound even if the notification sound signal reception unit receives the notification sound signal, and When the output setting unit sets the output mode, the notification output unit outputs the notification sound when the notification sound signal receiving unit receives the notification sound signal.

  The invention of claim 5 includes a fire detection unit that detects a fire, a detection signal transmission unit that transmits a detection signal to the outside when the fire detection unit detects a fire, and a notification sound signal reception unit that receives a notification sound signal from the outside And a fire alarm having a notification output unit for outputting a notification sound when the fire detection unit detects a fire and a notification sound signal receiving unit receiving a notification sound signal; and connected to the fire alarm device. A detection signal receiving unit that receives a detection signal from a fire alarm device, an alarm notification unit that notifies an alarm when the detection signal receiving unit receives the detection signal, and a fire A notification sound signal transmission unit that transmits a notification sound signal for outputting a notification sound from the alarm device to the fire alarm device is provided.

  The invention of claim 6 includes a detection signal receiving unit that receives a detection signal from the outside, an alarm notification unit that notifies an alarm when the detection signal receiving unit receives the detection signal, and a notification sound signal for outputting a notification sound. A fire detection unit for detecting a fire, and a fire detection unit used in an interphone system having an interphone master unit having a notification sound signal transmission unit to be transmitted to the outside and a fire alarm connected to the interphone master unit When a fire is detected, the detection signal transmitter that sends a detection signal to the intercom master unit, the notification sound signal receiver that receives the notification sound signal from the interphone master unit, and the fire detector outputs a warning when a fire is detected. And a notification output unit that outputs a notification sound when the notification sound signal reception unit receives the notification sound signal.

  According to the seventh aspect of the present invention, when the notification sound signal receiving unit receives the notification sound signal input from the intercom base unit in response to the call signal from the interphone handset, the notification output unit generates a notification sound for notifying the call. It is characterized by outputting.

  According to the first aspect of the present invention, when the notification sound signal receiving unit of the fire alarm device receives the notification sound signal from the interphone master unit, the notification output unit outputs the notification sound, so that the interphone master unit is not installed. However, there is an effect that it is possible to realize an intercom system that can notify a resident through a fire alarm if it is a place where a fire alarm is installed.

  According to the invention of claim 2, since the notification sound signal transmission unit transmits the notification sound signal to the fire alarm device when the call signal reception unit of the interphone base unit receives the call signal from the interphone child device, A notification sound can be output from the fire alarm in response to the call signal from the fire alarm. Therefore, there is an effect that it is possible to realize an intercom system that can surely notify a resident who has no interphone master unit but is installed in a place where a fire alarm is installed. .

  According to the invention of claim 3, since the intercom base unit is provided with a transmission setting unit for setting whether or not to transmit the notification sound signal for each fire alarm device, the fire alarm set as transmission required by the transmission setting unit The notification sound signal can be transmitted only to the device. Therefore, if you set so that the notification sound is not output from the fire alarm installed within the range where you can hear the notification sound from the intercom base unit, the notification sound from the intercom base unit and the notification sound from the fire alarm unit There is an effect that the sound does not overlap and does not make the residents uncomfortable.

  According to the invention of claim 4, each fire alarm is provided with an output setting section for setting the operation when the notification sound signal is input to either the output mode for outputting the notification sound or the non-output mode for not outputting the notification sound. Therefore, the notification sound can be output only from the fire alarm device in which the output setting unit is set to the output mode. Therefore, if you set so that the notification sound is not output from the fire alarm installed within the range where you can hear the notification sound from the intercom base unit, the notification sound from the intercom base unit and the notification sound from the fire alarm unit There is an effect that the sound does not overlap and does not make the residents uncomfortable.

  According to the invention of claim 5, the intercom master unit includes the notification sound signal transmission unit that transmits the notification sound signal to the fire alarm device, and the fire alarm device receives the notification sound signal from the notification sound signal transmission unit. Since the notification sound is output, even if the interphone master unit is not installed, it is possible to realize an interphone master unit that can notify the residents through the fire alarm if the fire alarm device is installed. There is.

  According to the invention of claim 6, the intercom master unit includes the notification sound signal transmission unit that transmits the notification sound signal to the fire alarm device, and the fire alarm device receives the notification sound signal from the notification sound signal transmission unit. Because the notification sound is output, it is possible to realize a fire alarm that can notify the resident through the fire alarm if the fire alarm is installed even if the intercom master unit is not installed There is.

  According to the seventh aspect of the present invention, when the notification sound signal receiving unit receives the notification sound signal input from the intercom base unit in response to the call signal from the interphone handset, the notification for notifying the call from the notification output unit Because it outputs a sound, it is possible to realize a fire alarm that can reliably notify a resident who has no intercom base unit but a fire alarm is installed. There is an effect that can be done.

  An embodiment of the present invention will be described with reference to FIGS. The intercom system A according to the present invention includes an interphone slave unit 4 installed at a front door or the like outside a residence, an interphone master unit 1 installed in a residence and performing a call with the interphone slave unit 4, and a fire occurrence. A fire alarm master unit 2 that detects and emits an alarm (for example, an alarm sound) and a plurality (two in FIG. 2) of fire alarm sub units 3 and notifies the interphone base unit 1 that an abnormality has occurred due to a push operation. And an external emergency button 5 for the purpose. The interphone slave unit 4 is connected to the interphone master unit 1 via a two-wire communication line 6, and the fire alarm master unit 2 and the fire alarm slave unit 3 are connected via a two-wire signal line 8. Are connected to the intercom base unit 1 in series. Note that the fire alarm unit 3 does not have a power supply circuit for generating the operation power of each part, and the operation power of each fire alarm unit 3 is supplied from the fire alarm master unit 2 via the signal line 8. The Further, the emergency button 5 is directly connected to a CPU 10 of the intercom base unit 1 to be described later via a signal line 7.

  First, the intercom handset 4 will be described with reference to FIG. The intercom unit 4 has a thin unit 4a having a rectangular shape in plan view, and an imaging unit 4b made of a CCD camera for imaging a visitor is provided at an upper position on the front side of the unit 4a. ing. In addition, a call button 4c for generating a call signal for calling a resident is provided at a lower position on the front side of the body 4a. Between the imaging unit 4b and the call button 4c, the interphone master unit 1 and There is provided a call section 4d in which a speaker and a microphone (not shown) for making a call are built. In addition, since the intercom subunit | mobile_unit 4 is using the conventionally well-known thing, description is abbreviate | omitted for the detail.

  Next, the intercom base unit 1 will be described with reference to FIGS. 1 and 2. The intercom base unit 1 has a thin rectangular body 1a in plan view, and displays an image captured by the imaging unit 4b of the intercom handset 4 at an upper position on the front side of the body 1a. A video display monitor 12 comprising a liquid crystal display (LCD) is disposed. Further, a call button 1d is provided at a lower position on the front side of the body 1a, and a call can be made with the interphone slave unit 4 by pressing the call button 1d. Further, between the video display monitor 12 and the call button 1d, there is provided a call unit 1c incorporating a speaker 17 and a microphone 18 for making a call with the interphone slave unit 4, and the call unit 1c. A plurality of (four in FIG. 2) function buttons 1e to 1h for displaying, for example, the video display monitor 12 or reproducing the recorded video are provided side by side. Here, in this embodiment, the intercom handset 4 is connected via the communication line 6, a communication path is formed with the interphone handset 4, and the interphone handset 4 is connected to this intercom path 4. The interphone master unit 1 is composed of only the interphone master unit that performs a call. However, the interphone master unit 1 is not limited to this embodiment, and signals are sent to the interphone master unit and the interphone master unit described above. The intercom base unit 1 may be configured with one or a plurality of interphone sub-base units connected via a line. The interphone sub-master unit forms a communication path with the interphone slave unit 4 via the interphone master unit and receives a video signal from the interphone slave unit 4 via the interphone master unit. Thus, interphone communication can be performed with the interphone slave unit 4 via the interphone main master unit.

  Here, the internal configuration of the intercom base unit 1 will be described based on the block diagram shown in FIG. The interphone master unit 1 demodulates a video signal transmitted by frequency multiplexing from a CPU 10 having a microcomputer as a main component, a video display monitor 12, and an intercom handset 4, and sends the video signal to the video display monitor 12. The video signal modulation / demodulation circuit 11 that outputs the video signal, the speaker 17 that outputs the audio signal transmitted from the intercom handset 4, the microphone 18 for inputting audio, and the audio input from the microphone 18 By comparing the signal and the audio signal transmitted from the intercom handset 4 and attenuating the voice signal having the lower signal level, the direction of the call (interphone main unit 1 → interphone sub unit 4 or interphone sub unit 4 → interphone) A voice processing circuit 13 having a voice switch function for switching the master unit 1) and a call button; From an intercom handset call detection circuit (calling signal receiving unit) 14 that detects a call signal transmitted from the intercom handset 4 according to the operation of c, a timer 16, and the fire alarm master unit 2 or the fire alarm sub unit 3 And a control I / F command transmission / reception circuit 15 for transmitting a notification sound signal to the fire alarm master unit 2 and the fire alarm sub unit 3. Here, the control I / F command transmission / reception circuit 15 constitutes a detection signal reception unit and a notification sound signal transmission unit, and the audio processing circuit 13 and the speaker 17 constitute an alarm notification unit. In this control I / F command transmission / reception circuit 15, the time division multiplexed signal is superimposed on the operating power supplied to the fire alarm device 3 through the two-wire signal line 8 and the superimposed time division multiplexed signal is detected. By doing so, a fire detection signal and a notification sound signal are transmitted and received.

  Next, the fire alarm master unit 2 will be described with reference to FIGS. 1 and 2. The fire alarm master device 2 has a thin disc-shaped device body 2a. As shown in FIG. 1, a CPU 19 having a microcomputer as a main component and heat or smoke generated by a fire, for example, A fire detection circuit (fire detection unit) 21 that detects a fire by detecting both, a data transmission / reception circuit 20 that transmits and receives a transmission signal between the intercom master unit 1 and the fire alarm cord 3, and an alarm and notification sound Etc., a notification output unit 24, a push button 23 and an operation circuit 22 for releasing an alarm output at the time of operation check, and a notification sound when receiving a notification sound signal from the intercom master unit 1. Notification sound output setting switch (output setting unit) 25 for setting whether to output or not, and a power supply circuit 26 for generating an operating power supply for each unit by a commercial power supply (100 V). Here, the data transmission / reception circuit 20 constitutes a detection signal transmission unit and a notification sound signal reception unit. In this data transmission / reception circuit 20, as with the control I / F command transmission / reception circuit 15 of the interphone master unit 1, a time division multiplexed signal is superimposed on the operation power supplied to the fire alarm unit 3 via the signal line 8 and A fire detection signal and a notification sound signal are transmitted and received by detecting the superimposed time division multiplexed signal.

  Furthermore, since the fire alarm device 3 has the same configuration as the fire alarm device 2 except that the power supply circuit 26 is not provided, the description thereof is omitted.

  The emergency button 5 has a main body portion 5a attached to, for example, a wall surface, and a push operation portion 5b is provided at a substantially central position of the main body portion 5a. Then, when the push operation unit 5b is pressed, it is notified through the signal line 7 that there is an abnormality in the intercom base unit 1, and an alarm is issued from the call unit 1c.

  Here, the operation when a fire occurs will be described. For example, when the CPU 19 determines in the fire alarm master unit 2 that a fire has occurred based on the detection output of the fire detection circuit 21, the CPU 19 controls the speaker 24 to generate an alarm sound (for example, a sound of a peep, a peep, etc.). ) And the data transmission / reception circuit 20 are controlled to transmit a fire detection signal to the signal line 8.

  On the other hand, in each fire alarm slave unit 3, when the data transmission / reception circuit 20 receives the fire detection signal transmitted from the fire alarm master unit 2, the CPU 19 controls the speaker 24 to output an alarm sound. In the intercom master unit 1, when the fire detection signal transmitted from the fire alarm master unit 2 is received by the control I / F command transmission / reception circuit 15, the CPU 10 controls the voice processing circuit 13 to output an alarm sound from the speaker 17. At the same time, the video modulation / demodulation circuit 11 is controlled to display a warning on the video display monitor 12 to notify the occurrence of a fire. As described above, when it is determined that a fire has occurred in the fire alarm master unit 2, the fire alarm master unit 2, all the fire alarm slave units 3 and the intercom master unit 1 can output an alarm sound to the residents. It is possible to quickly and surely notify that a fire has occurred. Similarly, when any fire alarm unit 3 determines that a fire has occurred, the fire alarm master unit 2, all the fire alarm units 3, and the intercom master unit 1 should output an alarm sound. It is possible to notify a resident quickly and surely that a fire has occurred.

  The fire alarm master unit 2 and each fire alarm slave unit 3 are provided with a push button 23 and an operation circuit 22 for releasing the alarm output at the time of operation check, etc., respectively. When the alarm sound is output from the fire alarm device 3, the output of the alarm sound is continued until the push button 23 is pressed. When the CPU 19 determines that the push button 23 is pushed and the push button 23 is pushed via the operation circuit 22, the CPU 19 controls the speaker 24 to stop the output of the alarm sound.

  Next, the operation when a visitor performs a call operation will be described based on the flowchart shown in FIG. First, when a visitor presses the call button 4c of the intercom handset 4 (step S1), a call signal is transmitted from the intercom handset 4 to the interphone base unit 1 through the communication line 6. When power is supplied from the power supply unit (not shown) of the intercom base unit 1 to the interphone slave unit 4 via the communication line 6, the imaging unit 4b is activated and the visitor's image captured by the imaging unit 4b is displayed on the communication line. 6 is transmitted to the intercom master unit 1 via 6. In the interphone master unit 1, when the CPU 10 receives the call signal via the interphone handset call detection circuit 14, the CPU 10 controls the voice processing circuit 13 to notify the speaker 17 of a call such as a ping pong. (Hereinafter referred to as a ringing tone) is output (step S2), and the video signal transmitted from the intercom handset 4 is demodulated by the video modulation / demodulation circuit 11 and displayed on the video display monitor 12. Further, the CPU 10 simultaneously controls the control I / F command transmission / reception circuit 15 to send a notification sound signal to the signal line 8 (step S3). In the fire alarm master unit 2 and each fire alarm slave unit 3, when the data transmission / reception circuit 20 receives the notification sound signal transmitted from the interphone master unit 1, the CPU 19 controls the speaker 24 to output a ringing tone ( Step S4). In this way, the control I / F command transmission / reception circuit 15 for transmitting the notification sound signal in response to the calling signal from the interphone handset 4 is provided in the interphone base unit 1 and the notification sound signal transmitted from the interphone base unit 1 is received. By outputting a ring tone from the fire alarm master unit 2 and each fire alarm slave unit 3, either the fire alarm master unit 2 or the fire alarm sub unit 3 can be used even in a place where no interphone equipment such as the interphone master unit 1 is installed. If the location is installed, the intercom system A, intercom master unit 1 and fire alarm (fire) that can reliably notify the residents through the fire alarm master unit 2 or the fire alarm sub unit 3 The alarm master unit 2 and the fire alarm unit 3) can be realized.

  Thereafter, in the intercom base unit 1, when the resident presses the call button 1 d in order to answer the call, the CPU 10 that detects that the call button 1 d has been pressed is interposed between the voice processing circuit 13 and the communication line 6. A call path is formed and a call is made with the intercom handset 4.

  When either the fire alarm master unit 2 or the fire alarm sub unit 3 detects the occurrence of a fire while the ringing tone is being output, and the fire detection signal is input to the CPU 10 of the intercom master unit 1, the CPU 10 To stop the ringing sound from the speaker 17 and output an alarm sound from the speaker 17 to notify the resident that a fire has occurred. Also in the fire alarm master unit 2 and each fire alarm slave unit 3, the CPU 19 controls the speaker 24 to stop the ringing tone and output an alarm sound from the speaker 24 to notify the resident that a fire has occurred. . Conversely, when the call button 4c of the intercom handset 4 is pressed while the alarm sound is being output and the call signal is input to the CPU 10 of the interphone master unit 1, the CPU 10 ignores the call signal from the interphone handset 4 and issues an alarm. Let the state continue.

  Here, in the fire alarm master unit 2 and each fire alarm slave unit 3, an output mode for outputting a notification sound when a notification sound signal transmitted from the interphone master unit 1 is received or a non-output mode for not outputting a notification sound The notification sound output setting switch 25 to be set to any of the above is provided. When the notification sound output setting switch 25 is set to the output mode, the CPU 19 controls the speaker 24 to output a ringing sound. Further, when the notification sound output setting switch 25 is set to the non-output mode, the CPU 19 controls the speaker 24 so that no ringing tone is output. Accordingly, by setting the notification sound output setting switch 25 to the non-output mode in the fire alarm master unit 2 or the fire alarm slave unit 3 installed within the range where the ring tone from the interphone base unit 1 can be heard, the interphone base unit 1 The ringing sound from the fire alarm master unit 2 or the fire alarm master unit 3 or the ringing sound from the fire alarm sub unit 3 will not be heard and will not make the residents uncomfortable. Further, the notification sound output setting switch 25 is set to the non-output mode for the fire alarm master unit 2 or the fire alarm slave unit 3 installed in a place where the ring tone is not desired to be output so that the ring tone is not output. Can be.

  Also, instead of providing a notification sound output setting switch 25 for the fire alarm master unit 2 and each fire alarm slave unit 3, the necessity of transmission of the notification sound signal is set for each of the fire alarm master unit 2 and each fire alarm slave unit 3 A setting switch (transmission setting unit) or the like may be provided in the interphone master unit 1, and it is not necessary to transmit the fire alarm master unit 2 or the fire alarm slave unit 3 installed within the range where the ring tone from the interphone master unit 1 can be heard. Similarly, the ringing tone from the intercom master unit 1 and the ringing tone from the fire alarm master unit 2 or the fire alarm slave unit 3 are not heard in the same manner, and the residents are not made uncomfortable. Furthermore, by assigning an individual address to each of the fire alarm master unit 2 and each fire alarm slave unit 3 and constructing a system in which the interphone master unit 1 is individually recognized, for example, by operating the function switches 1e to 1h, The intercom master unit 1 may be provided with a transmission setting function for setting whether or not the notification sound signal needs to be transmitted for each alarm master 2 and each fire alarm slave 3. In this case, it is possible to output a ringing tone only from the fire alarm master unit 2 or the fire alarm sub unit 3 that is set to require transmission of the notification sound signal by the transmission setting function.

  In the present embodiment, the ringing sound when the call operation is performed from the intercom handset 4 is described as an example of the notification sound. However, the notification sound is not limited to the ringing sound of the present embodiment. It may be a ringing tone (a ringing tone for a room call) from 1 to a person in the place where the fire alarm master unit 2 or the fire alarm sub unit 3 is installed. Further, in the present embodiment, the case where the alarm is an alarm sound has been described as an example. However, the alarm is not limited to the alarm sound, and may be a sound for notifying that a fire has occurred.

It is a block diagram of the intercom system of this embodiment. It is a system block diagram same as the above. It is a flowchart which shows the operation | movement in the case of a visitor alerting | reporting same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Interphone main unit 2 Fire alarm main unit 3 Fire alarm sub unit 4 Interphone sub unit 14 Interphone sub unit call detection circuit (call signal receiving unit)
15 Control I / F command transmission / reception circuit 17 Speaker 20 Data transmission / reception circuit 21 Fire detection circuit (fire detection unit)
24 Speaker (notification output unit)
25 Notification sound output setting switch (output setting section)

Claims (7)

  A fire alarm device and an interphone master unit connected to the fire alarm device. The interphone master device has a detection signal receiving unit that receives a detection signal from the fire alarm device, and the detection signal receiving unit detects the detection signal. The alarm notification unit that notifies the alarm when receiving the alarm and the notification sound signal transmission unit that transmits the notification sound signal for outputting the notification sound from the fire alarm to the fire alarm, the fire alarm detects the fire A fire detection unit, a detection signal transmission unit that transmits a detection signal to the interphone base unit when the fire detection unit detects a fire, a notification sound signal reception unit that receives a notification sound signal from the interphone base unit, and a fire detection An intercom system comprising: a notification output unit that outputs a warning when the unit detects a fire, and outputs a notification sound when the notification sound signal reception unit receives a notification sound signal.   When the call button is pressed, an interphone slave unit that outputs a call signal to the interphone master unit is provided, and the interphone master unit is provided with a call signal receiver unit that receives a call signal from the interphone slave unit, and the call signal receiver unit The intercom system according to claim 1, wherein the notification sound signal transmission unit transmits a notification sound signal to the fire alarm when receiving a call signal.   A plurality of the fire alarms, and the intercom master unit has a transmission setting unit for setting whether or not the notification sound signal needs to be transmitted for each fire alarm, and the fire set to be necessary for transmission by the transmission setting unit. The intercom system according to any one of claims 1 and 2, wherein the notification sound signal transmission unit transmits a notification sound signal to an alarm device.   Provided with a plurality of fire alarms, each fire alarm is provided with an output setting unit for setting the operation at the time of notification sound signal input to either the output mode for outputting the notification sound or the non-output mode for not outputting the notification sound, When each fire alarm is set to the non-output mode by the output setting unit, the notification output unit does not output the notification sound even if the notification sound signal receiving unit receives the notification sound signal, and the output setting unit The notification output unit outputs the notification sound when the notification sound signal receiving unit receives the notification sound signal when the output mode is set. Intercom system.   A fire detection unit that detects a fire, a detection signal transmission unit that transmits a detection signal when the fire detection unit detects a fire, a notification sound signal reception unit that receives a notification sound signal from the outside, and a fire detection unit A fire alarm device having a notification output unit that outputs a notification sound when the notification sound signal receiving unit receives a notification sound signal and outputs a notification sound when detected, and an interphone master unit connected to the fire alarm device Used in an intercom system, a detection signal receiver that receives a detection signal from a fire alarm, an alarm notification unit that notifies an alarm when the detection signal receiver receives the detection signal, and outputs a notification sound from the fire alarm An intercom master unit comprising: a notification sound signal transmission unit that transmits a notification sound signal for causing a fire alarm to be transmitted.   A detection signal receiving unit for receiving a detection signal from the outside, a warning notification unit for reporting a warning when the detection signal receiving unit receives the detection signal, and a notification sound signal for transmitting a notification sound signal for outputting a notification sound to the outside Used in an intercom system having an interphone master unit equipped with a transmitter and a fire alarm connected to the interphone master unit. A fire detection unit for detecting a fire and a detection signal when the fire detection unit detects a fire. A detection signal transmission unit that transmits a notification sound signal to the interphone base unit, a notification sound signal reception unit that receives a notification sound signal from the interphone base unit, and outputs a warning when the fire detection unit detects a fire, and a notification sound signal reception unit A fire alarm device comprising: a notification output unit that outputs a notification sound when receiving a notification sound signal.   When the notification sound signal receiving unit receives the notification sound signal input from the interphone base unit in response to the call signal from the interphone handset, the notification output unit outputs a notification sound for notifying the call The fire alarm according to claim 6.

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