JP5820322B2 - Intercom system - Google Patents

Description

  The present invention relates to an intercom system, and more particularly, to an intercom system that can automatically shift between home mode, absence mode, and absence mode.

  Conventionally, intercom systems that can switch between home mode and absence / absence mode are known, and switching between home mode and absence / absence mode is usually performed using the mode switching button provided on the main unit in the room. . However, in such an intercom system, there is a problem that the user may forget to press the mode switching button and go out.

  As a means to solve such problems, an answering machine switch is installed outdoors such as the entrance and the gate, and the absence / absence mode can be set by operating the answering machine switch not only from the main unit in the living room but also outdoors. An invention that can be set is disclosed (for example, see Patent Document 1).

  This intercom system has the advantage that even if you forget to switch to the absence / absence mode in your room, you can switch from the home mode to the absence / absence mode again at the entrance or gate after you go outside. Have.

  On the other hand, when you go out by going to the absence / absence mode by operating the mode switching button provided in the living room master unit, when you return from going out, you can operate the mode switching button again to switch to the home mode. However, an invention is also disclosed in which, when this operation is returned from going out and the electric lock at the entrance is unlocked, the mode switching button in the home unit is shifted to the home mode in conjunction with the unlocking of the electric lock. (For example, refer to Patent Document 2).

  In this intercom system, when you return from the house, you can move from the absence / absence mode to the home mode at the same time as unlocking the electric lock at the entrance. There is no worry of forgetting to switch to.

JP 2002-320041 A JP 2001-251434 A

  However, in the above-described conventional intercom system, the technique described in Patent Document 1 provides an answering setting switch outdoors in addition to the trouble of pressing a mode switching button. There was also a risk of being operated from outside.

  In addition, the technology described in Patent Document 2 has the advantage that when returning from the home, it can be switched from the absence / absence mode to the home mode in conjunction with the unlocking of the electric lock.・ If you forget to set the absence mode, there is a problem that the security setting is not performed and the role of crime prevention is not played.

  The present invention has been made to solve the above-described problems, and provides an intercom system that can automatically shift from a home mode to an absence / absence mode.

According to the first aspect of the intercom system of the present invention, the slave unit, the master unit for establishing a call in response to a call from the slave unit, and the information device such as a router having a predetermined access point Interphone system having a portable mobile terminal for data communication with the parent device, and the parent device confirms the connection / disconnection state with the portable mobile terminal via the information device A signal generation unit for generating a state confirmation signal for receiving the signal, and a signal reception unit for receiving a connection response signal transmitted via the information device from the connection response unit of the portable mobile terminal from which the state confirmation signal is received And a time measuring unit for measuring the time from when the state confirmation signal is generated by the signal generating unit until the connection response signal is received by the signal receiving unit, and within a predetermined time measured by the time measuring unit Connection response signal A state storage unit for registering the connection / disconnection state with the portable mobile terminal via the information device based on whether or not it is received, and the operation of the parent device corresponding to the registered content of the state storage unit have a mode setting unit for switching the mode to the home mode or away-unattended mode, the master unit, the count for counting the registered in the state storage unit connected / disconnected state of the portable mobile terminal number And a display processing unit for displaying the count information of the count unit on the display unit .

Further, according to the second aspect of the intercom system according to the present invention, an information device such as a slave unit, a master unit for establishing a call in response to a call from the slave unit, and a router having a predetermined access point Interphone system having a portable mobile terminal for performing data communication with the parent device via the terminal, wherein the parent device stores terminal information storage for storing ID registration information assigned to the portable mobile terminal A state confirmation signal for confirming the connection / disconnection state between the communication unit and the portable mobile terminal via the information device, and transmits it in correspondence with the ID registration information stored in the terminal information storage unit Signal generation unit and signal reception for receiving a connection response signal transmitted from the connection response unit of the portable mobile terminal from which the status confirmation signal is received, with the ID registration information of the own terminal added and transmitted via the information device Part A time measuring unit for measuring the time from when the state confirmation signal is generated by the signal generating unit to when the connection response signal is received by the signal receiving unit, and within a predetermined time measured by the time measuring unit A state storage unit for registering a connection / non-connection state with the portable mobile terminal via the information device together with the received ID registration information based on whether or not the connection response signal is received; in association with the registered contents have a mode setting unit for switching the operation mode of the master unit to the home mode or away-unattended mode, the master unit has been registered in the state storage unit connected / unconnected the It has a count part for counting the number of portable mobile terminals, and a display processing part for displaying the count information of the count part on the display part .

According to the third aspect of the intercom system of the present invention, the slave unit, the master unit for establishing a call in response to a call from the slave unit, and an information device such as a router having a predetermined access point are used. Interphone system having a portable mobile terminal for data communication with the parent device, and the parent device confirms the connection / disconnection state with the portable mobile terminal via the information device A signal generation unit for generating a state confirmation signal for receiving the signal, and a signal reception unit for receiving a connection response signal transmitted via the information device from the connection response unit of the portable mobile terminal from which the state confirmation signal is received And a time measuring unit for measuring the time from when the state confirmation signal is generated by the signal generating unit until the connection response signal is received by the signal receiving unit, and within a predetermined time measured by the time measuring unit Connection response signal A state storage unit for registering the connection / disconnection state with the portable mobile terminal via the information device based on whether or not it is received, and the operation of the parent device corresponding to the registered content of the state storage unit It has a mode setting unit for switching the mode to the home mode or away-unattended mode, the master unit, the terminal information to store the unique name information of the portable mobile terminal connection state registered in the state storage unit The registration unit compares the ID registration information of the mobile mobile terminal in the connected state registered in the state storage unit with the unique name information stored in the terminal information registration unit, and the ID registration information of the mobile mobile terminal in the connected state And a display processing unit for causing the display unit to display the unique name information assigned to .

According to the fourth aspect of the intercom system of the present invention, the slave unit, the master unit for establishing a call in response to a call from the slave unit, and an information device such as a router having a predetermined access point Interphone system having a portable mobile terminal for performing data communication with the parent device via the terminal, wherein the parent device stores terminal information storage for storing ID registration information assigned to the portable mobile terminal A state confirmation signal for confirming the connection / disconnection state between the communication unit and the portable mobile terminal via the information device, and transmits it in correspondence with the ID registration information stored in the terminal information storage unit Signal generation unit and signal reception for receiving a connection response signal transmitted from the connection response unit of the portable mobile terminal from which the status confirmation signal is received, with the ID registration information of the own terminal added and transmitted via the information device Part A time measuring unit for measuring the time from when the state confirmation signal is generated by the signal generating unit to when the connection response signal is received by the signal receiving unit, and within a predetermined time measured by the time measuring unit A state storage unit for registering a connection / non-connection state with the portable mobile terminal via the information device together with the received ID registration information based on whether or not the connection response signal is received; in association with the registered contents have a mode setting unit for switching the operation mode of the master unit to the home mode or away-unattended mode, the master unit, the portable mobile terminal connection state registered in the state storage unit The terminal information registration unit for storing the unique name information, the ID registration information of the mobile mobile terminal in the connection state registered in the state storage unit and the unique name information stored in the terminal information registration unit, Connected mobile mobile end And having a display unit for displaying a unique name information assigned to the ID registration information on the display unit.

Furthermore, according to a fifth aspect of the intercom system of the present invention , in any one of the first to fourth aspects , the mobile mobile terminal is a mobile terminal capable of wireless data communication.

  According to the present invention, when a specific mobile mobile terminal is connected, the home mode is automatically set. When the mobile terminal is not connected, the absence / absence mode can be set. There is no need to manually set the mode or absence / absence mode, especially in the living room or outdoors, and the mode can be automatically switched between modes, so the resident will not forget to set each mode. Stable crime prevention effect is obtained.

  In addition, the number of registered mobile mobile terminals connected / disconnected is counted and displayed, and further, the specific name information assigned to the registration information of the mobile mobile terminal is displayed, so which mobile mobile terminal is connected. It is easy to check whether the home mode or the absence / absence mode is set reliably.

It is a system configuration figure of the intercom system of the present invention. It is a block diagram of the subunit | mobile_unit, main | base station, information apparatus, and portable mobile terminal of the intercom system of this invention. It is a figure which shows an example of the condition of a home mode or absence / absence mode in the intercom system of this invention.

  Hereinafter, preferred embodiments of an interphone system according to the present invention will be described with reference to the drawings.

  FIG. 1 is a system configuration diagram of an intercom system 1 according to the present invention. The intercom system 1 includes a slave unit 2, a master unit 3, an information device 4, and a portable mobile terminal 5. The slave unit 2 and the master unit 3 are connected by wire to the master unit 3 and the information device 4, and the information device 4 and the portable mobile terminal 5 are connected by radio.

  As conventionally known, the slave unit 2 includes a camera CA, a microphone MC, a speaker SP, a call button 21 and the like, and the master unit 3 includes a display unit in addition to the microphone MC, the speaker SP, the operation unit 316 and the like. (Monitor) 306 is provided. The information device 4 has a function of a router with an access point, for example, and can transmit and receive radio signals to and from the mobile mobile terminal 5. For example, an Android (registered trademark) terminal is used as the portable mobile terminal 5, and software (application) necessary for the intercom system of the present invention is installed.

  FIG. 2 is a block diagram of the intercom system 1 according to the present invention, and particularly the configuration of the base unit 3 is described in detail. The base unit 3 includes an interface (I / F) 301 for transmitting / receiving signals to / from the slave unit 2 and an interface (I / F) 302 for transmitting / receiving signals to / from the information device 4. , I / F 301 is connected to slave unit 2, and I / F 302 is connected to information device 4. Further, the master unit 3 is provided with a master unit CPU 303 so that each unit constituting the master unit 3 can be controlled.

  The master CPU 303 is connected to a voice processing unit 304 that processes voice for a visitor and a resident to talk with the slave unit 2, and the visitor image captured by the camera CA of the slave unit 2 is connected. A video processing unit 305 for processing video is connected. The audio processing unit 304 is connected to the handset 2 via the I / F 301, and the microphone MC and the speaker SP are connected to the audio processing unit 304. In addition, a display unit (monitor) 306 is connected to the video processing unit 305, and the video processing unit 305 is connected to the slave unit 2 via the I / F 301.

  The base unit CPU 303 includes a signal generation unit 307 that generates a state confirmation signal for confirming the connection / disconnection state of the portable mobile terminal 5 and a signal reception unit 308 for receiving a connection response signal from the portable mobile terminal 5. It is connected. The signal generator 307 and the signal receiver 308 are each connected to the I / F 302.

  Further, a timing unit 309 for timing the time from when the signal generation unit 307 generates the state confirmation signal until the signal reception unit 308 receives the connection response signal is connected to the master CPU 303. In addition, a state storage unit 310 for registering the connection / disconnection state of the mobile terminal 5 is connected. In addition, a mode setting unit 311 for switching the operation mode of the parent device 3 to the home mode or the absence / absence mode corresponding to the registered contents of the state storage unit 310 is connected.

  By the way, when there are a plurality of portable mobile terminals 5, ID registration information is assigned to each terminal, and a terminal information storage unit 312 for storing the assigned ID registration information is connected to the master CPU 303. Has been. The base unit CPU 303 is connected with a count unit 313 for counting the number of connected / unconnected portable mobile terminals 5 registered in the state storage unit 310, and displays count information of the count unit 313. A display processing unit 314 for displaying on the unit 306 is connected. The display processing unit 314 is also connected to the I / F 302 in order to transfer data to the portable mobile terminal 5.

  A terminal information registration unit 315 for storing the unique name information of the mobile mobile terminal 5 in the connected state registered in the state storage unit 310, such as a name, is connected to the parent CPU 303. Note that an operation unit 316 for performing various operations of the parent device 3 is connected to the parent device CPU 303, and the parent device 3 is provided with a power supply unit 317 for supplying power to each component. . The connection relationship from the power supply unit 317 to each component is omitted.

  On the other hand, the mobile mobile terminal 5 receives a state confirmation signal from the base unit 3 and wirelessly communicates with the terminal CPU 51, the connection response unit 52 and the information device 4 for transmitting the connection response signal of the mobile mobile terminal 5. Is provided with an interface (I / F) 53 for transmitting and receiving signals. In addition, description is abbreviate | omitted about the detail of a structure of the subunit | mobile_unit 2 and the information equipment 4. FIG.

  Next, the operation of the intercom system 1 of the present invention having the above configuration will be described. Note that the operation in which the visitor presses the call button 21 of the handset 2 and the resident responds to it is the same as a conventionally known operation, and thus description thereof is omitted.

  First, in order to connect the base unit 3 and the portable mobile terminal 5, the terminal information registration unit 315 acquires connection information including specific name information of the plurality of portable mobile terminals 5 in advance, and corresponds to the assigned ID registration information. The information is stored in the information storage unit 312. Based on this connection information, the signal generation unit 307 of the base unit 3 generates and transmits a state confirmation signal. This state confirmation signal is transmitted to the information device 4 via the I / F 302 of the base unit 3 and further transmitted from the information device 4 to the terminal CPU 51 via the I / F 53 of the portable mobile terminal 5 by radio. The radio signal in this case uses a frequency band that can be transmitted and received within a certain distance between the information device 4 and the portable mobile terminal 5.

  When this state confirmation signal is normally received by the mobile mobile terminal 5, the connection response unit 52 of the terminal CPU 51 in the mobile mobile terminal 5 transmits the connection response signal. The connection response signal is wirelessly transmitted to the information device 4 via the I / F 53 and received by the signal receiving unit 308 via the I / F 302 of the parent device 3. Thereafter, on the basis of the connection response signal, the reception status of the mobile mobile terminal 5 and device information indicating which terminal is the mobile mobile terminal among the plurality of mobile mobile terminals are stored in the state storage unit 310.

  On the other hand, when the portable mobile terminal 5 is not connected, that is, when the state confirmation signal is not received by the portable mobile terminal 5, the time until the reception after the state confirmation signal is generated is measured by the timer unit 309 and set in advance. If the measured time (for example, 5 seconds) is exceeded, the time excess information is transmitted to the signal receiving unit 308, and the non-connection information (information that the status confirmation signal is not received) and the device information are stored in the status storage unit 310. Is done.

  In this way, connection information or non-connection information stored in the state storage unit 310 is transferred to the mode setting unit 311. In the mode setting unit 311, the unique name information acquired from the terminal information storage unit 312, the ID registration information of the plurality of mobile mobile terminals 5, the home mode of each mobile mobile terminal 5, the reflection / non-reflection information in the settings of the absence / absence mode The connection / disconnection information for each of the plurality of ID registration information is collected. In this way, it is determined whether the user is at home or absent / absent based on the information collected by the mode setting unit 311, and the home mode or absence / absence mode is automatically set.

  In addition, it is desirable that the setting of reflection / non-reflection to the home mode or absence / absence mode of the plurality of mobile mobile terminals 5 can be manually set individually by the operation unit 316 of the base unit 3. This is because it may be possible to set the user to stay away from home or stay away from home, so that the so-called absence mode can be set.

  The reason why it is desirable to manually set whether to reflect / not reflect in home mode or absence / absence mode is, for example, when one resident has two mobile mobile terminals, take one and take it out However, because the other unit remains in the room, the home mode is automatically set. However, in this case, no resident is in the room and no crime prevention setting is made. Therefore, if the home mode is set to non-reflecting manually, one portable mobile terminal remains in the room. This is because crime prevention settings can be made.

  In addition, as a reason for setting the absence mode, for example, when a child under elementary school is taking an answering machine, it is possible to set the absence / absence mode while staying at home for crime prevention so as not to cancel the crime prevention setting.

  Each information collected by the mode setting unit 311 is transferred to the display processing unit 314, processed so that it can be displayed, transferred to the display unit 306, and displayed. Further, the connection / disconnection information stored in the state storage unit 310 is sent to the count unit 313, and the count unit 313 calculates the registered number information and the connected number information of the portable mobile terminal 5. The calculated registered number information, connected number information, and non-connected number information obtained by subtracting the connected number from the registered number are transferred to the display processing unit 314, processed so as to be displayed, transferred to the display unit 306, and displayed. As the display unit 306, a conventionally known flat panel display such as an LCD, point illumination such as an LED, a 7-segment display, or the like is used.

  As described above, when the state confirmation signal from the parent device 3 does not return as the connection response signal from the portable mobile terminal 5, that is, the range of wireless connection between the parent device 3 and the portable mobile terminal 5 via the information device 4 is determined. If the mobile mobile terminal 5 moves out of the service area, all of the residents have gone out with this mobile mobile terminal 5, and in this case, the absence / absence mode is automatically set. Is set. On the other hand, when the status confirmation signal and the connection response signal are transmitted and received between the base unit 3 and the portable mobile terminal 5, that is, when the portable mobile terminal 5 is within a wireless connection range, At home, the home mode is automatically set.

  As described above, in the intercom system according to the present invention, the mode is automatically changed between the home mode and the absence / absence mode depending on whether the portable mobile terminal 5 is in the range of wireless connection with the base unit 3 or out of the range. To be done. When the home mode is entered, the normal intercom system operation is performed, that is, the call from the slave unit to the master unit, the transfer to the portable mobile terminal, etc., and the security sensor is entered when the absence mode is set. Is activated, security measures such as vigilance settings are taken, call information is stored, video information is stored, and the like.

  FIG. 3 shows unique name information (name) collected by the mode setting unit 311, registration ID information of the mobile mobile terminal, mode selection information indicating whether the home mode or absence / absence mode is reflected or not, mobile mobile terminal The example shows a case where connection status information for each item, result information indicating whether the user is in the home mode or absence / absence mode, and information indicating whether the user is currently home / absence / absence are displayed on the display unit. Accordingly, for example, Mr. A's portable mobile terminal is in the range of wireless connection with the parent device 3, so that it can be known that Mr. B, D, and E are at home. Since it is out of range of wireless connection, it can be seen that it is away / absent. Since the home mode or absence / absence mode is set for each dwelling unit, the home mode is automatically set for the dwelling unit in the case of the display in FIG.

  Here, as for Mr. C, Mr. C's portable mobile terminal (ID0003) is in the range of wireless connection with the parent device 3 and is displayed as connected in the connection status. Since it is set not to reflect (set to non-reflect), the absence / absence mode is displayed, and the absence / absence mode (so-called absence mode) is set while at home. In this way, various modes can be set.

  In addition, when a malfunction occurs in the intercom system, for example, when a malfunction occurs due to a communication error between the mobile mobile terminal 5 and the information device 4 or a battery exhausted from the mobile mobile terminal 5 (for example, the user stays at home but is away from home).・ The status of the malfunction can also be confirmed by the display unit when the absence mode is displayed.

  In this embodiment, the mobile mobile terminal is exemplified as a terminal capable of making a call. However, the mobile mobile terminal is not limited to such a terminal. For example, a portable terminal that does not have a call function may be used. A simple terminal may be used.

  In addition, if there is a visitor when no resident is in the absence / absence mode in the dwelling unit, the information is stored in the master unit by voice or video by applying the conventional technology and stored. It is also possible to transfer the received information to the portable mobile terminal using, for example, the Internet line.

  The present invention can be applied not only to a detached intercom system but also to an intercom system for an apartment house, and can be used without particular limitation in the technical field of an intercom system having the same object as the present invention.

1 ... Interphone system 2 ... Slave unit 3 ... Master unit 4 ... Information device 5 ... Mobile mobile terminal 52 ... Connection response unit 306 ... Display unit 307 ... Signal generator 308 Signal receiver 309 Timing unit 310 State storage unit 311 ... Mode setting unit 312 ... Terminal information storage unit 313 ... Count unit 314 ... -Display processing unit 315 .... Terminal information registration unit

Claims (5)

The parent device (2), the parent device (3) for establishing a call in response to a call from the child device, and the parent device via an information device (4) such as a router having a predetermined access point An intercom system having a portable mobile terminal (5) for data communication with a machine,
The base unit receives a signal generation unit (307) that generates a state confirmation signal for confirming a connection / disconnection state with the portable mobile terminal via the information device, and the state confirmation signal is received. A signal reception unit (308) for receiving a connection response signal transmitted from the connection response unit (52) of the portable mobile terminal via the information device, and the state check by the signal generation unit A timing unit (309) for timing the time from when a signal is generated until the connection response signal is received by the signal receiving unit, and the connection within a predetermined time measured by the timing unit A state storage unit (310) for registering a connection / disconnection state with the portable mobile terminal via the information device based on whether or not a response signal is received, and registration contents of the state storage unit Corresponding to the operation mode of the parent unit. Mode setting unit for switching the de-to-home mode or absence, unattended mode and (311) possess,
The base unit has a count unit (313) for counting the number of connected mobile mobile terminals registered in the state storage unit, and count information of the count unit is displayed on the display unit (306). An intercom system comprising a display processing unit (314) for displaying . The parent device (2), the parent device (3) for establishing a call in response to a call from the child device, and the parent device via an information device (4) such as a router having a predetermined access point An intercom system having a portable mobile terminal (5) for data communication with a machine,
The master unit is connected / disconnected between the terminal information storage unit (312) for storing ID registration information assigned to the portable mobile terminal and the portable mobile terminal via the information device. A signal generation unit (307) that generates a state confirmation signal for confirming and transmits the state confirmation signal in correspondence with the ID registration information stored in the terminal information storage unit, and the portable mobile terminal that has received the state confirmation signal A signal reception unit (308) for receiving a connection response signal transmitted from the connection response unit (52) with the ID registration information of its own terminal transmitted through the information device; and the signal generation unit A time measuring unit (309) for measuring a time from when the state confirmation signal is generated until the connection response signal is received by the signal receiving unit, and a predetermined time measured by the time measuring unit Within the connection response signal A state storage unit (310) for registering a connection / disconnection state with the portable mobile terminal via the information device together with the received ID registration information based on whether or not the information is received; mode setting unit for in correspondence with the registered contents of the state storage unit switches the operation mode of the master unit to the home mode or absence, unattended mode and (311) possess,
The base unit has a count unit (313) for counting the number of connected mobile mobile terminals registered in the state storage unit, and count information of the count unit is displayed on the display unit (306). An intercom system comprising a display processing unit (314) for displaying . The parent device (2), the parent device (3) for establishing a call in response to a call from the child device, and the parent device via an information device (4) such as a router having a predetermined access point An intercom system having a portable mobile terminal (5) for data communication with a machine,
The base unit receives a signal generation unit (307) that generates a state confirmation signal for confirming a connection / disconnection state with the portable mobile terminal via the information device, and the state confirmation signal is received. A signal reception unit (308) for receiving a connection response signal transmitted from the connection response unit (52) of the portable mobile terminal via the information device, and the state check by the signal generation unit A timing unit (309) for timing the time from when a signal is generated until the connection response signal is received by the signal receiving unit, and the connection within a predetermined time measured by the timing unit A state storage unit (310) for registering a connection / disconnection state with the portable mobile terminal via the information device based on whether or not a response signal is received, and registration contents of the state storage unit Corresponding to the operation mode of the parent unit. Mode setting unit for switching the de-to-home mode or absence, unattended mode and (311) possess,
The base unit includes a terminal information registration unit (315) for storing the unique name information of the portable mobile terminal in the connection state registered in the state storage unit, and the connection state registered in the state storage unit. The ID registration information of the portable mobile terminal is compared with the unique name information stored in the terminal information registration unit, and the unique name information assigned to the ID registration information of the mobile mobile terminal in the connected state is displayed on the display unit (306). An intercom system comprising a display processing unit (314) for displaying . The parent device (2), the parent device (3) for establishing a call in response to a call from the child device, and the parent device via an information device (4) such as a router having a predetermined access point An intercom system having a portable mobile terminal (5) for data communication with a machine,
The master unit is connected / disconnected between the terminal information storage unit (312) for storing ID registration information assigned to the portable mobile terminal and the portable mobile terminal via the information device. A signal generation unit (307) that generates a state confirmation signal for confirming and transmits the state confirmation signal in correspondence with the ID registration information stored in the terminal information storage unit, and the portable mobile terminal that has received the state confirmation signal A signal reception unit (308) for receiving a connection response signal transmitted from the connection response unit (52) with the ID registration information of its own terminal transmitted through the information device; and the signal generation unit A time measuring unit (309) for measuring a time from when the state confirmation signal is generated until the connection response signal is received by the signal receiving unit, and a predetermined time measured by the time measuring unit Within the connection response signal A state storage unit (310) for registering a connection / disconnection state with the portable mobile terminal via the information device together with the received ID registration information based on whether or not the information is received; mode setting unit for in correspondence with the registered contents of the state storage unit switches the operation mode of the master unit to the home mode or absence, unattended mode and (311) possess,
The base unit includes a terminal information registration unit (315) for storing the unique name information of the portable mobile terminal in the connection state registered in the state storage unit, and the connection state registered in the state storage unit. The ID registration information of the portable mobile terminal is compared with the unique name information stored in the terminal information registration unit, and the unique name information assigned to the ID registration information of the mobile mobile terminal in the connected state is displayed on the display unit (306). An intercom system comprising a display processing unit (314) for displaying . The interphone system according to any one of claims 1 to 4 , wherein the portable mobile terminal is a portable terminal capable of wireless data communication.

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