JP2018166263A - Intercom system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intercom system capable of improving convenience of a mute function.SOLUTION: An intercom system includes an entrance slave unit 20 performing a calling operation, a room master unit 30 configured to be able to communicate with the entrance slave unit 20, and a portable terminal 50 communicable with the room master unit 30. The room master unit 30 has a master unit speaker 32 notifying of a ringback tone based on a calling signal from the entrance slave unit 20, a mute setting part 36 capable of setting the sound volume of the ringback tone in a mute state, and a room master unit communication interface 37 capable of transmitting the calling signal to the portable terminal 50. The portable terminal 50 has a terminal speaker 52 for notifying of the ringback tone, that is the calling operation based on the calling signal, and when the room master unit 30 is set in the mute state, the room master unit communication interface 37 of the room master unit 30 transmits the calling signal from the entrance slave unit 20 to the portable terminal 50, and the terminal speaker 52 notifies of the ringback tone based on the calling signal.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an intercom system.

  2. Description of the Related Art Conventionally, there is one in which a mute function (mute function) is added to a room base unit constituting an interphone system.

JP-A-11-127248

  However, in the conventional intercom system, for example, if the user forgets to set the mute function, the call of the visitor may not be noticed. Thus, the conventional intercom system has room for improvement in the convenience of the mute function.

  An object of the present invention is to provide an intercom system capable of improving the convenience of a mute function.

The intercom system according to the present invention is
An entrance cordless handset for performing call operations;
A room master unit configured to be communicable with the entrance slave unit;
A portable terminal capable of communicating with the living room master unit;
With
The room master is
A room notification unit that notifies a ringing tone based on a calling signal from the entrance cordless handset,
A mute setting unit capable of setting the volume of the ringer to a mute state;
A transmitter capable of transmitting the call signal to the mobile terminal;
Have
The portable terminal has a portable notification unit that performs a calling operation based on the calling signal,
When the living room parent device is set to the mute state, the transmitting unit of the living room parent device transmits the calling signal from the entrance child device to the portable terminal, and the portable notification unit based on the calling signal Performs a call operation.

  According to the above configuration, when the room master is set to the mute state, a call signal is transmitted to the mobile terminal, and the mobile terminal performs a call operation (ringing sound, vibration, message, etc.). For this reason, for example, even when the user forgets to set the mute function, the user can easily notice the call of the visitor by the call operation of his / her mobile terminal. For this reason, the user's psychological anxiety when setting the mute function is reduced, and the usability (convenience) of the mute function is improved.

  In the intercom system of the present invention, when the state where the mobile notification unit is performing a call operation based on the call signal for a predetermined time continues, the mute state of the room master unit is canceled and the room notification is performed. A ringing tone may be notified from the unit.

  According to the above configuration, for example, even when the user is away from the mobile terminal and is not aware of the call operation, the mute state of the room parent unit is automatically released, and the ring alert is sent from the room notification unit. Is notified. This makes it easier for the user to notice the visitor's call.

  In the intercom system according to the present invention, when the portable terminal receives two or more calls based on the call signal during a predetermined time, the mute state of the room master is canceled and the room notification unit A ringing tone may be notified.

  According to the above configuration, for example, even when the user is away from the mobile terminal and does not notice the call more than once, the mute state of the room master is automatically released, and the room notification unit Will alert you of a ringing tone. This makes it easier for the user to notice the visitor's call.

  In the intercom system of the present invention, when a response signal that is returned to the living room master unit when the portable terminal receives the calling signal is not returned from the portable terminal for a predetermined time, the living room parent The mute state of the machine may be canceled and a ringing tone may be notified from the room notification unit.

  According to the above-described configuration, for example, when the battery of the mobile terminal is exhausted and is in an unusable state, the mute state of the room master is automatically released, and a ringing tone is notified from the room notification unit. For this reason, it becomes easy to notice a visitor's call.

In the intercom system of the present invention, the portable terminal can communicate with the living room master unit via a local communication network built around the living room, and the portable terminal is located at a position away from the local communication network. Can communicate with the living room master unit via an external public network,
When the living room parent device detects that the portable terminal has moved to a position outside the local communication network, the living room parent device may be set to the mute state.

  According to the above configuration, when the mobile terminal moves to a position outside the local communication network, the room master is automatically set to the mute state. This eliminates the need to manually set the mute state, and improves the convenience of the mute function.

  In the intercom system of the present invention, when the portable terminal detects that the portable terminal has moved into the local communication network after the portable terminal has moved to a position outside the local communication network, The mute state of the parent device may be canceled.

  According to the above configuration, when the portable terminal returns to the local communication network again, the mute state of the room master is automatically released. For this reason, it is not necessary to manually perform the operation of canceling the mute state, and the convenience of the mute function is improved.

  ADVANTAGE OF THE INVENTION According to this invention, the intercom system which can improve the convenience of a mute function can be provided.

It is a schematic block diagram of the intercom system which shows embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the structure of the intercom system which shows embodiment of this invention, Comprising: (a) is a schematic block diagram of an entrance child machine, (b) is a schematic block diagram of an office master, (c) is a portable terminal It is a schematic block diagram. It is a figure explaining the automatic setting and automatic cancellation | release of the mute state in a living room main | base station, Comprising: (a) is a block diagram when a portable terminal exists in the position remove | deviated from a local communication area, (b) is a portable terminal local It is a block diagram when existing in a communication area. FIG. 6 is a diagram for explaining automatic setting and automatic cancellation of a mute state in a living room base phone when a plurality of mobile terminals are provided, and (a) is a configuration diagram when all mobile terminals exist in a local communication area; (B) is a block diagram in the case where all the mobile terminals are present at positions away from the local communication area, and (c) is a block diagram in the case where one mobile terminal is present in the local communication area.

Hereinafter, an example of this embodiment will be described with reference to the drawings.
As shown in FIG. 1, the intercom system 1 includes an entrance cordless handset 20, a living room base phone 30, and a portable terminal 50. FIG. 1 shows an intercom system 1 installed in a detached house J.

  The entrance cordless handset 20 is installed at the entrance of the house J, and is used to call and call a resident. The room master unit 30 is installed in the room of the house J and is used to respond to a call from the front door unit 20. The entrance cordless handset 20 and the room base phone 30 are configured to be communicable via a signal line L.

  As shown in FIG. 2 (a), the entrance slave device 20 includes an entrance microphone 21, an entrance speaker 22, a call button 23, a camera 24, an entrance slave device CPU 25, and an entrance slave device communication interface 27. The entrance cordless handset 20 is for a visitor to perform a predetermined calling operation when calling a resident who is at home in the living room of the house J, and is provided on an outer wall surface or the like at the entrance of the house J. .

  The entrance microphone 21 and the entrance speaker 22 are used to input and output audio when a visitor makes a call with a resident. The call button 23 is a part operated by the visitor when the visitor performs a call operation for calling a resident. The camera 24 is for photographing a visitor who performs a call operation.

  The entrance microphone 21, the entrance speaker 22, the call button 23, and the camera 24 are connected to the entrance handset CPU 25. An audio signal from the entrance microphone 21 and a video signal from the camera 24 are transmitted to the entrance slave unit CPU 25, and an input signal is transmitted from the call button 23 when operated by the call button 23. In addition, the entrance cordless handset CPU 25 outputs an audio signal to the entrance speaker 22. The entrance slave device CPU 25 controls the entrance slave device 20. An entrance slave device communication interface 27 is connected to the entrance slave device CPU 25, whereby the entrance slave device 20 communicates with the entrance master device 30 via the entrance slave device communication interface 27. Send and receive signals.

  As shown in FIG. 2B, the living room parent unit 30 includes a parent unit microphone 31, a parent unit speaker (an example of a living room notification unit) 32, a parent unit operation unit 33, a parent unit display unit 34, a living room parent unit CPU 35, A mute setting unit 36 and a room base unit communication interface (an example of a transmission unit) 37 are provided. The room master unit 30 is for responding to a call from a visitor from the entrance handset 20, and is provided on a wall surface of the room in the house J.

  The base unit microphone 31 and the base unit speaker 32 are used to input and output audio when a resident makes a call with a visitor. The base unit operation unit 33 is a part operated by a resident. The base unit operation unit 33 receives a response operation for responding to a call from the front door slave unit 20. For example, by operating the master unit operation unit 33, a call with a visitor is made possible or a release operation for opening the entrance door is performed in order to respond to a call from the entrance slave unit 20. The parent device display unit 34 is for displaying a visitor's image taken by the camera 24 of the front door device 20. The parent device display unit 34 includes a touch panel, and a part of the parent device display unit 34 also constitutes the parent device operation unit 33. The mute setting unit 36 is connected to the room master unit CPU 35. The mute setting unit 36 sets the mute state and cancels the mute state for the living room base unit 30 by an operation from the base unit operation unit 33 or the like.

  The parent microphone 31, the parent speaker 32, the parent device operation unit 33, and the parent device display unit 34 are connected to the living room parent device CPU 35. A voice signal from the parent microphone 31 is transmitted to the parent device CPU 35, and an input signal is transmitted from the parent device operation unit 33 to the living room parent CPU 35 when operated by the parent device operation unit 33. The In addition, the room base unit CPU 35 outputs an audio signal to the base unit speaker 32 and outputs a video signal to the base unit display unit 34. The room master unit CPU 35 controls the room master unit 30. The living room parent device CPU 35 is connected to the living room parent device communication interface 37, so that the living room parent device 30 communicates with the entrance child device 20 via the living room parent device communication interface 37. Send and receive signals.

  Further, the living room base unit communication interface 37 is connected to a communication device 38 including a repeater such as a WiFi (registered trademark) router, for example (see FIG. 1). Thereby, the living room base unit communication interface 37 can communicate with a communication device in a local communication area (an example of a local communication network) LA that is an area (WiFi area) in which communication is possible by the communication device 38. Further, the office base unit communication interface 37 is also connected to the Internet (an example of a public network) In which is a communication network, and communication via the Internet In is possible.

  As shown in FIG. 2C, the mobile terminal 50 includes a terminal microphone 51, a terminal speaker (an example of a mobile notification unit) 52, a terminal operation unit 53, a terminal display unit 54, a mobile terminal CPU 55, and a mobile terminal communication interface 57. I have. The mobile terminal 50 is a terminal such as a mobile phone or a smartphone that is carried by a resident of the house J.

  The terminal microphone 51 and the terminal speaker 52 are for inputting / outputting voice when the owner of the portable terminal 50 makes a call with another portable terminal 50 or a fixed telephone. The terminal operation unit 53 is a part that is variously operated by the owner of the mobile terminal 50.

  The terminal display unit 54 can display a visitor's image and various types of information taken by the camera 24 of the front door 20. The terminal display unit 54 includes a touch panel, and a part of the terminal display unit 54 also configures the terminal operation unit 53.

  The terminal microphone 51, the terminal speaker 52, the terminal operation unit 53, and the terminal display unit 54 are connected to the mobile terminal CPU 55. An audio signal from the terminal microphone 51 is transmitted to the portable terminal CPU 55, and an input signal is transmitted from the terminal operation unit 53 to the portable terminal CPU 55 when operated by the terminal operation unit 53. The mobile terminal CPU 55 outputs an audio signal to the terminal speaker 52 and outputs a video signal to the terminal display unit 54. The mobile terminal CPU 55 controls the mobile terminal 50. The portable terminal 50 can be operated using an application stored in a storage unit (not shown).

  A mobile terminal communication interface 57 is connected to the mobile terminal CPU 55. The mobile terminal communication interface 57 can communicate with the room base unit communication interface 37 of the room base unit 30 through the communication device 38 in a state where the mobile terminal 50 is in the local communication area LA. The mobile terminal communication interface 57 can be connected to the Internet In, and communication via the Internet In is possible. The portable terminal 50 can communicate with the room master unit 30 via the communication device 38 or the Internet In by registering terminal identification information such as a telephone number and an e-mail address in the room master unit 30. The Thereby, the portable terminal 50 can receive the calling signal from the entrance cordless handset 20 via the living room base unit 30.

  In the intercom system 10 configured as described above, when a visitor presses the call button 23 of the entrance cordless handset 20, a ringing tone is notified from the base unit speaker 32 in the room base unit 30. Accordingly, the resident recognizes the presence of the visitor and operates the room master unit 30 as needed to respond to the visitor's call. Note that the ringing tone includes not only a sound such as an electronic sound notifying a visitor but also a sound such as a message notifying a visitor.

  By the way, there are cases where the resident does not want to ring the ringing tone in the room master unit 30 at rest or at night. In such a case, the resident can set the room master unit 30 to the mute state and mute the ringing sound from the base unit speaker 32 of the room master unit 30. However, if the ringing sound from the main unit speaker 32 of the living room main unit 30 is muted, the resident may not be aware of the calling from the front cordless handset 20 when he / she forgets that it is in the mute state.

  For this reason, the intercom system 10 according to the present embodiment includes a mute function that improves convenience.

Next, the mute function in the intercom system 10 having the above configuration will be described.
(Mute state setting)
The in-room master unit 30 is set to a mute state when the resident operates the master unit operation unit 33 of the in-room master unit 30. The setting operation of the living room base unit 30 to the mute state can also be performed by operating an application of the portable terminal 50. As described above, when the setting operation to the mute state is performed on the room master unit 30, the room master unit 30 is set to the mute state by the mute setting unit 36 of the room master unit 30.

(Call in mute state)
When the call button 23 of the entrance cordless handset 20 is pressed by a visitor while the room base unit 30 is set to the mute state, the room base unit CPU 35 causes the room base unit CPU 35 to call the ringer sound from the base unit speaker 32. The call signal is transmitted from the living room base unit communication interface 37 to the portable terminal 50 without notification. The room master unit 30 may not only notify the ringing tone when calling in the mute state, but may make a ringing tone slightly from the parent unit speaker 32.

  In the mobile terminal 50, the mobile terminal CPU 55 performs a call operation based on the call signal received by the mobile terminal interface 57. The calling operation in the portable terminal 50 is a ringing sound or message from the terminal speaker 52 or vibration by a vibrator. Therefore, the resident who has the portable terminal 50 can recognize the visitor by the calling operation from the portable terminal 50 even if the room master unit 30 is in the mute state.

(Cancel mute status)
(1) Manual cancellation by operation of the operation unit The setting of the mute state is canceled when the resident operates the parent device operation unit 33 of the living room parent device 30. Further, the mute state release operation of the room master unit 30 can also be performed by operating the application of the portable terminal 50. In this way, when the mute state canceling operation is performed on the room master unit 30, the mute setting unit 36 of the room base unit 30 releases the mute state of the room base unit 30. On the other hand, a ringing tone is notified from the parent device speaker 32 of the living room parent device 30.

(2) Automatic cancellation based on calling time When the state in which the portable terminal 50 is performing a calling operation based on the calling signal continues for a predetermined time set in advance, the mute setting unit 36 of the living room master unit 30 The mute state of the machine 30 is automatically canceled. As a result, a ringing sound is notified from the parent device speaker 32 of the living room parent device 30 in response to a call from the front child device 20. Note that the setting of the ringing time, which is a predetermined time, can be changed by the resident.

(3) Automatic cancellation based on the number of calls When the mobile terminal 50 has called more than once based on a call signal during a predetermined time set in advance, the mute setting unit 36 of the room master unit 30 sets the room parent The mute state of the machine 30 is automatically canceled. As a result, a ringing sound is notified from the parent device speaker 32 of the living room parent device 30 in response to a call from the front child device 20. Note that the predetermined time is a time for one call state, and is, for example, about 45 seconds.

(4) Automatic cancellation based on the state of the portable terminal When the portable terminal 50 receives a call signal from the living room parent machine 30, it returns a response signal to the living room parent machine 30. When the response signal from the portable terminal 50 is not returned to the room master unit 30 within a predetermined time, the mute setting unit 36 of the room master unit 30 automatically cancels the mute state of the room master unit 30. As a result, a ringing sound is notified from the parent device speaker 32 of the living room parent device 30 in response to a call from the front child device 20. For example, when the charge amount of the battery of the portable terminal 50 is reduced, the mute state is automatically set when the so-called battery is dead and the device cannot be used and the response signal cannot be returned to the room master unit 30. Canceled.

  As described above, according to the intercom system 10 according to the present embodiment, when the room base unit 30 is set to the mute state, the call signal is transmitted to the mobile terminal 50 and the mobile terminal 50 performs the call operation. (Ringing tone, vibration, message, etc.). For this reason, for example, even if the user has forgotten that the mute function has been set, the user who is a resident is likely to notice the call of the visitor by the call operation of his / her mobile terminal 50. . For this reason, the user's psychological anxiety when setting the mute function is reduced, and the usability (convenience) of the mute function is improved.

  Further, when the state in which the mobile terminal 50 is performing the calling operation based on the calling signal continues for a predetermined time set in advance, the mute setting unit 36 of the room base unit 30 automatically sets the mute state of the room base unit 30. For example, even when the user is away from the portable terminal 50 and does not notice the calling operation, the mute state of the room parent unit 30 is automatically released and the parent unit speaker 32 is released. Will alert you of a ringing tone. This makes it easier for the user to notice the visitor's call.

  Further, in the portable terminal 50, when there are two or more calls based on the call signal for a predetermined time set in advance, the mute setting unit 36 of the room master 30 automatically sets the mute state of the room master 30. Release it. For this reason, for example, even when the user is away from the portable terminal 50 and does not notice two or more calls, the mute state of the living room parent unit 30 is automatically released, and the parent unit speaker 32 is released. Will alert you of a ringing tone. This makes it easier for the user to notice the visitor's call.

  Further, when the response signal from the portable terminal 50 is not returned to the room master unit 30 within a predetermined time, the mute setting unit 36 of the room base unit 30 automatically cancels the mute state of the room base unit 30. For example, when the battery of the portable terminal 50 has run out and is in an unusable state, the mute state of the room base unit 30 is automatically released, and a ringing tone is notified from the base unit speaker 32. For this reason, it becomes easy to notice a visitor's call.

  In the above embodiment, the master unit operation unit 33 sets and cancels the mute state. However, the room master unit 30 may be provided with a separate button for setting and canceling the mute state.

  Further, the setting and release of the mute state of the living room base unit 30 may be automatically set and released based on the position of the mobile terminal 50.

  Next, automatic setting and automatic cancellation of the mute state based on the position of the mobile terminal 50 will be described.

(Auto-mute setting)
As shown in FIG. 3A, when the mobile terminal 50 is present at a position outside the local communication area LA, the mobile terminal 50 can communicate with the living room base unit 30 via the Internet In. As described above, when the mobile terminal 50 moves to a position outside the local communication area LA, the living room master 30 moves the mobile terminal 50 to a position outside the local communication area LA based on the communication state with the mobile terminal 50. Detect the presence. Then, the room master unit 30 is set to the mute state by the mute setting unit 36. Thus, the calling operation is performed on the portable terminal 50 without a ringing sound being notified from the parent device speaker 32 of the living room parent device 30 in response to a call from the front child device 20. For example, when the resident goes out with the portable terminal 50 and the child is answering in the house J, the ringing tone is notified from the living room master unit 30 and the child does not respond freely. Therefore, the resident can go out in peace.

  Thus, when the portable terminal 50 moves to a position outside the local communication area LA, the room master unit 30 is automatically set to the mute state by the mute setting unit 36. This eliminates the need to manually set the mute state, and improves the convenience of the mute function.

(Automatic mute release)
After the mobile terminal 50 has moved to a position outside the local communication area LA and then moved into the local communication area LA, as shown in FIG. It becomes possible to communicate with. Thus, when the portable terminal 50 moves into the local communication area LA, the in-room master unit 30 detects that the portable terminal 50 exists in the local communication area LA based on the communication state with the portable terminal 50. . Then, the mute state is canceled by the mute setting unit 36 in the living room master unit 30. As a result, a ringing sound is notified from the parent device speaker 32 of the living room parent device 30 in response to a call from the front child device 20.

  In this way, when the portable terminal 50 returns to the local communication area LA again, the mute state of the room master unit 30 is automatically released by the mute setting unit 36. For this reason, it is not necessary to manually perform the operation of canceling the mute state, and the convenience of the mute function is improved.

  Next, automatic setting and automatic cancellation when a plurality of portable terminals 50 are registered in the room master unit 30 will be described.

(Auto-mute setting)
As shown in FIG. 4A, the telephone numbers of a plurality (three in this example) of portable terminals 50 (50a, 50b, 50c) are registered in the room master unit 30, and are transmitted via the communication device 38 or the Internet In. In the state in which communication with the living room base unit 30 is possible, as shown in FIG. 4B, when all the mobile terminals 50 move to positions outside the local communication area LA, It is detected that all the mobile terminals 50 exist in positions outside the local communication area LA based on the communication state with the other mobile terminals 50. Then, the room master 30 is automatically set to the mute state by the mute setting unit 36. Thus, the calling operation is performed on all (three) mobile terminals 50 without notifying the calling sound from the parent speaker 32 of the living room parent device 30 in response to the calling from the front child device 20.

  Note that the present invention is not limited to the above example. For example, when at least one mobile terminal 50a moves to a position outside the local communication area LA, the living room base unit 30 communicates with the mobile terminal 50a moved to the off position. Based on the state, it may be configured that the portable terminal 50a is detected at a position outside the local communication area LA, and the room master unit 30 is automatically set to the mute state by the mute setting unit 36.

(Automatic mute release)
After all the mobile terminals 50 are moved to a position outside the local communication area LA and set in the mute state, as shown in FIG. 4C, at least one mobile terminal 50b is in the local communication area LA. When the room base unit 30 detects that one mobile terminal 50b exists in the local communication area LA by moving, the remaining (two) mobile terminals 50a and 50c are located outside the local communication area LA. The mute state is canceled by the mute setting unit 36 of the living room base unit 30.
Regarding the call operation in this case, for example, first, the remaining (two) mobile terminals 50a and 50c at positions outside the local communication area LA perform the call operation. When no response is made by the mobile terminals 50a and 50c, the mobile terminal 50b in the local communication area LA performs a call operation. When the mobile terminal 50b does not respond, a ringing tone is notified from the parent device speaker 32 of the living room parent device 30.

  As for the order of the call operation, after the remaining (two) mobile terminals 50a and 50c at positions outside the local communication area LA perform the call operation, next, from the base unit speaker 32 of the room base unit 30 It is good also as a structure by which a ringing tone is alert | reported. Then, when no response is made even in the room master unit 30, the mobile terminal 50b in the local communication area LA may perform a calling operation.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, the local communication area LA in the house J is not limited to an area (WiFi area) that can be communicated by the communication device 38, but may be an area set based on geofence information. For example, by registering the room location information in advance by a dedicated application installed in the mobile terminal 50, the room master CPU 35 of the room master 30 obtains a geofence that is the virtual range of the house J. Then, this geofence information is recorded as the local communication area LA of the house J.

  Moreover, in said embodiment, although the example of a detached house was demonstrated, it is clear that this invention may be applied to an apartment house.

10: Interphone system, 20: Entrance slave unit, 30: Living room parent unit, 32: Parent unit speaker (an example of a room notification unit), 36: Mute setting unit, 37: Living room parent unit communication interface (an example of a transmission unit), 50: Mobile terminal, 52: Terminal speaker (an example of a portable notification unit), LA: Local communication area (an example of a local communication network), In: Internet (an example of a public line network)

Claims (6)

An entrance cordless handset for performing call operations;
A room master unit configured to be communicable with the entrance slave unit;
A portable terminal capable of communicating with the living room master unit;
With
The room master is
A room notification unit that notifies a ringing tone based on a calling signal from the entrance cordless handset,
A mute setting unit capable of setting the volume of the ringer to a mute state;
A transmitter capable of transmitting the call signal to the mobile terminal;
Have
The portable terminal has a portable notification unit that performs a calling operation based on the calling signal,
When the living room parent device is set to the mute state, the transmitting unit of the living room parent device transmits the calling signal from the entrance child device to the portable terminal, and the portable notification unit based on the calling signal Performs the call action,
Intercom system. When the state in which the portable notification unit is performing a call operation based on the call signal for a predetermined time continues, the mute state of the room base unit is canceled and a ringing tone is notified from the room notification unit. The
The intercom system according to claim 1. When there are two or more calls based on the call signal for a predetermined time in the portable terminal, the mute state of the room master is released and a ringing tone is notified from the room notification unit,
The intercom system according to claim 1 or 2. When the portable terminal does not return a response signal that is returned to the living room base unit during a predetermined time when the mobile terminal receives the calling signal, the mute state of the living room base unit is released. And a ringing tone is notified from the room notification unit,
The intercom system according to any one of claims 1 to 3. The portable terminal is communicable with the living room master unit via a local communication network constructed in the vicinity of the living room, and is external when the portable terminal is located away from the local communication network. Can communicate with the room master via the public line network of
When the living room base unit detects that the mobile terminal has moved to a position outside the local communication network, the living room base unit is set to the mute state.
The intercom system according to any one of claims 1 to 4. After the portable terminal has moved to a position outside the local communication network, when the living room master detects that the portable terminal has moved into the local communication network, the mute state of the living room master is Released,
The intercom system according to claim 5.

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