JP2005311673A - Interphone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable communication between a sub-unit for an emergency call located inside a residence and a portable telephone outside the residence. <P>SOLUTION: A master unit 4 installed inside a residence 2 communicates with a portable telephone outside the residence 2. An porch sub-unit 6 installed at the porch of the residence 2 communicates with the master unit 4. A panic button 12 disposed inside the residence 2 can perform radio communication with the master unit 4. When a call arises from the panic button 12, the master unit 4 calls the portable telephone 16, also operates a chime provided in the master unit 4, and enables communication between the panic button 12 and either one of the apparatuses generating a response earlier between the response from the portable telephone 16 and the response initiated by the operation of a button switch provided in the master unit 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an interphone, and more particularly, to an intercom that can make a radio call with an emergency slave.

  The interphone is used to make a call between a parent device installed inside a house and a child device installed outside the house, for example, at a front door. Incidentally, for example, Patent Document 1 discloses an interphone that can make a call with a visitor when he / she is out.

  In the technology disclosed in Patent Document 1, when there is a call from an entrance cordless handset when you are away, the base phone makes a call to a predetermined mobile phone, and between the mobile phone and the entrance cordless handset via the base set. It is possible to make a call.

Japanese Patent Laid-Open No. 9-163000

  According to the technique of Patent Document 1, a visitor at the entrance can talk with a resident who is out of the house. By the way, when a sick person etc. exists in a house, this sick person may want to contact someone urgently by the change of the medical condition etc. In particular, when there is no person other than the sick in the house, it is necessary to contact a resident who is out, but the technique of Patent Document 1 cannot cope with such a state.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an intercom that can make a call from an emergency calling handset in a house to an external calling device.

  The intercom according to one aspect of the present invention includes a master unit installed inside a house. This base unit is configured to be able to talk to an external call device outside the house. As an external communication device, there are a fixed telephone device and the like in addition to a mobile communication device such as a mobile phone and a PHS. An external cordless handset is installed outside the house. The external slave unit is installed, for example, at a front door or the like, and can communicate with the master unit. A call between the parent device and the external child device can be performed by wire or wirelessly. An emergency cordless handset is arranged inside the house. This emergency cordless handset is preferably arranged in the vicinity of a care recipient such as a sick person. In addition, in order to enable a call even if a care recipient is present at any place, a wireless call is possible with the parent device. When there is a call from the emergency slave unit, the master unit calls the external call device. At the same time, the master unit activates the call notification means provided in the master unit. Thus, if there is a resident in the house, the resident is notified. As the call notification means, it is desirable to make an audible and / or visual notification. The master unit is provided with a call response means, and this call response means is operated when responding to the notification by the call notification means. Of the response from the external call device and the response by the operation of the call response means, the device that responds first can make a call with the emergency slave by the master.

  With this configuration, if a care recipient needs to be contacted urgently, a call can be made promptly with a resident in the vicinity of the parent device in the house, a resident who is out, or any other person who can be contacted. It becomes possible and can respond quickly to emergency situations of care recipients.

  In addition, an in-house cordless handset can be installed in the interphone of the above aspect. This in-house child device can talk to the parent device. This call may be either wired or wireless. When there is a call from the emergency slave unit, the master unit not only calls the external communication device and activates the call notification means, but also calls the residential slave unit. In addition to the response from the external communication device and the response by the operation of the call response means of the parent device, the parent device includes the response of the child device in the house, and the device that responded first among these responses. It is possible to make a call with the emergency handset.

  If comprised in this way, in addition to the resident who is going out and the resident who exists in the vicinity of a main machine, including the resident who exists in the vicinity of a child machine in a house, it can contact with the person who can respond most quickly among these. .

  The interphone according to another aspect of the present invention includes a parent device, an external child device, and an emergency child device, as in the above-described embodiment. The emergency device can be used in any state among the state in which the parent device can communicate with the external child device and the state in which the external communication device and the external child device can communicate with each other via the parent device. When there is a call from the slave unit, the master unit, for example, forcibly releases the call-enabled state at that time, calls the external call device, and activates the call notification means provided in the master unit Of the response from the external call device and the response by the operation of the call response means provided in the master unit, the device that has responded first can make a call with the emergency slave unit.

  According to this aspect, even if the master unit and the external slave unit are in a call, even if the external communication device and the external slave unit are in a call, the call is interrupted, and the emergency slave unit A call is notified, and the device that has responded first to the call can make a call with the emergency device.

  In this aspect, the residential child device can be installed in the same manner as in the above aspect. In this case, when there is a call from the emergency slave unit, the master unit also calls the residential slave unit, and the master unit responds to the response from the external communication device and the call response means of the master unit. In addition to the response by the operation, including the response of the in-home slave unit, the device that has occurred first among these responses is allowed to make a call with the emergency slave unit.

  If comprised in this way, possibility that it will be able to contact from an emergency cordless handset becomes high.

  In each aspect described above, a plurality of external call devices can be installed. In this case, the base unit calls the plurality of external call devices in order. With this configuration, for example, when there is no response from a certain external call device within a predetermined time, for example, another external call device can be called and the probability of being able to be contacted can be increased.

  As described above, according to the present invention, when there is a call from the emergency slave unit, it is possible to make a call with the one that has responded first, and particularly when an external telephone device responds first, Since it is possible to make a call with this, it is possible to contact even if there is no resident other than the care recipient in the house.

  In the intercom according to one embodiment of the present invention, a base unit 4 is installed in a house 2 as shown in FIG. In addition, an external slave device, for example, the entrance slave device 6 is disposed outside the house 2, for example, the entrance. Further, a sensor slave unit 8 is disposed outside the house 2, for example, in a place where an illegal intruder easily enters. Moreover, the indoor subunit | mobile_unit 10 is installed in the different place in the house 2, respectively. Further, an emergency handset, for example, a panic button 12 is disposed in the house 2 where a care recipient is present. Each of these devices is configured to be capable of wireless communication with each other. Furthermore, the base unit 4 is configured to be able to make a call with an external call device such as a mobile phone 16 via an external telephone line 14, and the main unit 4, the indoor unit 10, and the panic button 12 via the base unit 4. Is configured to be able to talk to the mobile phone 16.

  The base unit 4 includes an input key 4a for registering a telephone number, a display panel 4b for displaying a telephone number, a button switch 4c for responding to a call from the front door unit 6, and calling each indoor unit 10 or Along with the button switch 4d that is operated when called from the handset 10, the speaker 4e that outputs the voice from the other party, the microphone 4f that picks up the voice to be sent to the other party, the telephone line connector 4g, and the main unit 4. Connector 4h for connecting to the installed telephone 18; volume volume 4i; volume 4j for calling chime that rings when called; relay output 4k for operating external devices such as lamp 20 when ringing; antenna 4m; alarm A lamp 4n is provided.

  The entrance cordless handset 6 is provided with a call button switch 6a, a speaker 6b, a microphone 6c, and an antenna 6d. Similarly, the panic button 12 is provided with a call button switch 12a, a speaker 12b, a microphone 12c, and an antenna 12d.

  The sensor slave unit 8 is provided with a sensor 8a, a speaker 8b that outputs a sound threatening the intruder, a microphone 8c for picking up the sound of the intruder, and an antenna 8d.

  The indoor cordless handset 10 has a button switch 10a for responding to a call from the entrance cordless handset 6 and the master phone 4, when another indoor cordless handset 10 is called, or when another indoor cordless handset 10 is called. A button switch 10b, a speaker 10c, a microphone 10d, an antenna 10e, an alarm lamp 10f, a volume volume 10g, and a chime volume 10h are provided.

  In this intercom, as shown in FIG. 2, when the call button switch 12a of the panic button 12 or the call button switch 6a of the front door device 6 is operated (step S2), the panic button 12 or the front door device 6 becomes the parent device. A call signal is transmitted to 4 (step S4). Then, it is determined whether there is a response from the parent device 4 (step S6). If the answer to this determination is yes, a call operation with the parent device 4 is started (step S7). If the answer to the determination in step S6 is no, it is determined whether a certain time has passed (step S8). If the answer to this determination is no, the process returns to step S6. If the answer to the determination in step S8 is yes, a standby state is entered (step S9).

  When the sensor 8a of the sensor slave unit 8 detects an intruder or the like (step S10), a call signal is transmitted to the base unit 4 (step S12), and it is determined whether there is a response from the base unit 4 (step S14). If the answer to the determination is yes, a call operation with the parent device 4 is started (step S15). If the answer to the determination in step S14 is no, it is determined whether a certain time has passed (step S16). If the answer to this determination is no, the process returns to step SS14. If the answer to step S15 is yes, a standby state is entered (step S17).

  When the call button switch 10b of the indoor child device 10 is operated (step S18), the indoor child device 10 transmits a calling signal to the parent device 4 (step S20). Then, it is determined whether there is a response from the parent device 4 (step S22). If the answer to this determination is yes, a call operation with the parent device 4 is started (step S23). If the answer to the determination in step S22 is no, it is determined whether a predetermined time has passed (step S24). If the answer to this determination is no, the process returns to step S22. If the answer to the determination in step S24 is yes, a standby state is entered (step S25).

  On the other hand, as shown in FIG. 3 (a), when the master unit 4 receives a call signal from the panic button 12 (step S26), at that time, other processing, for example, the entrance slave unit 6, the sensor slave unit 8 or Even during a call process with the indoor child device 10, this is interrupted and a panic alarm operation process is executed. That is, in the base unit 2, the call from the panic button 12 is processed with the highest priority. Further, in the base unit 4, when there is a call from the entrance handset 6, the sensor handset 8 or the indoor handset 10 when not in a call with the panic button 12 as shown in FIG. 3B (step S28). Then, it is determined whether the call is from the sensor slave unit 8 (step S30). If the answer is yes, a sensor alarm operation process is executed. If the answer to the determination in step S30 is no, it is determined whether the call is from the front door 6 (step S32). If the answer is yes, the entrance machine call operation process is executed. If the answer to the determination in step S32 is no, it is a call from the indoor child device 10, so an indoor child device calling operation process is performed.

  As shown in FIG. 4, in the panic alarm operation process, first, base unit 4 transmits a panic signal to all indoor unit 10 (step S34). Thus, the indoor child device 10 performs an indoor child device panic alarm operation process described later. Subsequent to step S34, the alarm lamp 4n blinks, the chime sounds an alarm sound for 1 minute, and a relay make operation is performed (step S36). The lamp 20 is turned on by the relay make operation.

  Subsequent to step S36, a call is made to a preset registration destination such as a mobile phone (step S38). Subsequently, it is determined whether the registration destination telephone has answered (step S40). If the answer to this determination is yes, base unit 4 transmits a response signal to panic button 12 and transmits a determination signal to each indoor unit 10 (step S42). As a result, a call is started between the registration-destination mobile phone and the panic button 12.

  If the answer to the determination in step S40 is no, it is determined whether the response button switch 4c of the parent device 4 has been pressed (step S44). If the answer to this determination is yes, base unit 4 transmits a response signal to panic button 12 and transmits a determination signal to each indoor unit 10 (step S46). As a result, a call is started between the parent device 4 and the panic button 12.

  If the answer to the determination in step S44 is no, it is determined whether any of the indoor child devices 10 has received a signal indicating that the response button switch 10a has been pressed (step S48). If the answer to this determination is yes, base unit 4 transmits a response signal to panic button 12 (step S50). As a result, a call is started between the indoor cordless handset 10 and the panic button 12.

  If the answer to the determination in step S48 is no, it is determined whether the call has been made for a predetermined number of times at the registration destination (step S52). If the answer to this determination is no, the process is executed again from step S40. If the answer to the determination in step S52 is yes, it is determined whether there is a next registration destination (step S54). If the answer to this determination is yes, a call is made to the next registration destination (step S56), and the processing is executed again from step S40. If the answer to the determination in step S54 is no, it is determined whether the predetermined number of redials has been redialed (step S58). If the answer to the determination is no, step S56 is executed. If the answer to the determination in step S58 is yes, base unit 4 enters a standby state and panic button 12 returns to the sleep state (step S60).

  When there is a call from the panic button 12 as described above, the cellular phone, the base unit 4, and the indoor unit 10 registered in advance are repeatedly called in order. During this repetition, a call is started between the panic button 12 and the one that has responded first among the mobile phone, the main unit 4 and the indoor unit 10. The panic button 12 is configured to be able to communicate wirelessly with the parent device 4 or with the mobile phone or the indoor child device 10 via the parent device 4, so that the care recipient can convey his / her situation through conversation. . If a bell operated in the event of an emergency is placed in the vicinity of the person in need of care, the residents in the house can be informed of the emergency, but the situation cannot be communicated. Moreover, no contact is possible in situations where no one is in the house. However, if the panic button 12 is used, it is possible to convey the current situation through conversation whether or not there are people in the house.

  In addition, the panic alarm operation | movement of each indoor subunit | mobile_unit 10 is performed as shown in FIG. That is, the alarm lamp 10f of the indoor cordless handset 10 is blinked, the chime is operated for 1 minute, and an alarm is notified (step S62). If a lamp is provided outside as with the base unit 2, this lamp can be turned on. It is determined whether the response button switch 10a of any one indoor unit 10 has been operated (step S64). If the answer to this determination is no, it is determined whether a response signal indicating that the mobile phone or the base unit 4 has responded has been received from the base unit 4 (step S66). If the answer to this determination is no, the process returns to step S64. If the answer to the determination in step S66 is yes, the indoor unit 10 returns to the standby state (step S68). If the answer to the determination in step S64 is yes, a signal indicating that the response button switch has been operated is transmitted to the master unit 4 (step S70), and the master unit 4 transmits a stop signal to the remaining indoor slave units 10. (Step S72), a telephone call is started between the indoor cordless handset 10 and the panic button 12. Further, the remaining indoor child device 10 returns to the stopped state by the execution of step S72 (step S74).

  In the entrance machine calling operation process, it is determined whether the parent machine 4 is set to the stay mode as shown in FIG. 6 (step S76). When the answer to this determination is no, the outing mode process is executed, and when the answer to this determination is yes, the stay mode process is executed. Note that the switching between the outing mode and the stay mode is performed by operating a mode switching switch (not shown) provided in the base unit 4, and when the resident of this house goes out, the mode is switched to the outing mode, In other cases, the mode is switched to the stay mode.

  As shown in FIG. 7, in the outing mode process, first, the base unit 4 transmits a signal indicating that a call has been received from the front door unit 6 to all the indoor units 10 and emits a chime sound several times (steps). S78). Thereby, as will be described later, each indoor slave unit 10 executes an entrance slave unit calling operation process.

  Subsequent to step S78, a call is made to a preset registration destination such as a mobile phone (step S80). Subsequently, it is determined whether the registration destination telephone has answered (step S82). If the answer to this determination is yes, the base unit 4 transmits a response signal to the front door unit 6 and transmits a determination signal to each indoor unit 10 (step S84). As a result, a telephone call is started between the registration-destination mobile phone and the entrance terminal 6.

  If the answer to the determination in step S82 is no, it is determined whether the response button switch 4c of the parent device 4 has been pressed (step S86). If the answer to this determination is yes, the base unit 4 transmits a response signal to the front door unit 6 and transmits a determination signal to each indoor unit 10 (step S88). Thus, a call is started between the parent device 4 and the entrance child device 6.

  If the answer to the determination in step S86 is no, it is determined whether any of the indoor child devices 10 has received a signal indicating that the response button switch 10a has been pressed (step S90). If the answer to this determination is yes, the base unit 4 transmits a response signal to the front door unit 6 (step S92). Thereby, a call is started between the indoor cordless handset 10 and the entrance cordless handset 6.

  If the answer to the determination in step S90 is no, it is determined whether the call has been made a predetermined number of times at the registration destination (step S94). If the answer to this determination is no, the process is executed again from step S82. If the answer to the determination in step S94 is yes, it is determined whether redialing has been performed a predetermined number of times (step S96). If the answer to the determination is no, the process is executed again from step S82. If the answer to the determination in step S96 is yes, the parent device 4 enters a standby state, and the entrance child device 6 returns to the sleep state (step S98). As described above, in the outing mode, the registration destination, the main unit 4 and the indoor unit 10 are repeatedly called in order, and a call can be made between the one that has responded first and the entrance unit 6 in between.

  In the entrance slave unit calling operation of the indoor slave unit 10, as shown in FIG. 8, first, the ring tone of each indoor slave unit 10 is sounded several times (step S100), and the response button switch 10a is set in any of the indoor slave units 10. It is determined whether it has been operated (step S102). If the answer to this determination is no, it is determined whether a signal indicating that the registration destination or the master has responded has been received from the master 4 (step S104). If the answer to this determination is no, the process returns to step S102. If the answer to the determination in step S104 is yes, it is determined whether the specified calling time has elapsed (step S106). If the answer to this determination is no, the process is executed again from step S102. If the answer to the determination in step S106 is yes, the indoor unit 10 returns to the standby state (step S108).

  If the answer to the determination in step S102 is yes, a signal indicating that the response button switch 10a has been operated is transmitted to the parent device 4 (step S110). Subsequent to step S110, the base unit 4 transmits a stop signal to the remaining indoor units 10 (step S112), and a call is started between the indoor units 10 and the entrance unit 6. In step S112, the other indoor unit 10 returns to the standby state (step S114).

  In the stay mode, as shown in FIG. 9, the base unit 4 transmits a signal to the effect that the calling signal from the entrance unit 6 has been received to all the indoor units 10 and emits a chime sound several times (step S116). . By the transmission to all the indoor child devices 10, the above-described entrance child device calling operation of the indoor child devices 10 is executed in each indoor child device 10. Following step S116, it is determined whether the response button switch 4c of the parent device 4 has been operated (step S118). If the answer to this determination is yes, the master unit 4 transmits a response signal to the entrance slave unit 6 and transmits a determination signal to each indoor slave unit 10 (step S120), whereby the master unit 4 and the entrance unit are transmitted. A call with the machine 6 is started.

  If the answer to the determination in step S118 is no, it is determined whether any of the indoor slave units 10 has received a signal indicating that the response button switch 10a has been operated (step S122). If the answer to this determination is yes, the parent device 4 transmits a response signal to the front door device 6 (step S124). Thereby, a call is started between the indoor cordless handset 10 and the entrance cordless handset 6.

  If the answer to the determination in step S122 is no, it is determined whether the specified calling time has elapsed (step S126). If the answer to the determination is no, the process is executed again from step S118. If the answer to the determination in step S126 is yes, the base unit 4 and each indoor unit 10 return to the standby state, and the front unit 6 returns to the sleep state (step S128). As described above, in the stay mode, the main unit 4 and the indoor unit 10 are repeatedly called for a predetermined time, and the call between the main unit 4 or the indoor unit 10 and the entrance unit 6 that has responded first in the meantime. Is done. In this way, in the stay mode, calling the master unit 4 and each indoor unit 10 in order is repeated, and a call is performed between the device that responded first and the entrance unit 6 during this repetition.

  In the sensor alarm operation process, it is determined whether the parent device 4 is in the stay mode as shown in FIG. 10 (step S130). If the answer to this determination is yes, the sensor alarm on operation process is immediately executed. If the answer to this determination is no, the process waits for a specified time to elapse after receiving the signal from the sensor 8a (step S132). The sensor alarm ON operation process is executed after the specified time has elapsed.

  As shown in FIG. 11, in the sensor alarm ON operation process, first, base unit 4 transmits a signal indicating that there is a call from sensor slave unit 8 to all indoor slave units 10 (step S134). Accordingly, as will be described later, the sensor alarm operation process is executed in each indoor slave unit 10. Subsequent to step S134, the alarm lamp 4n blinks to sound an alarm sound for 1 minute, and a relay make operation is performed (step S136). The lamp 20 is turned on by this relay make operation.

  Next, a call is made to a preset registration destination such as a mobile phone (step S138). Subsequently, it is determined whether the registration destination telephone has answered (step S140). If the answer to this determination is yes, the master unit 4 transmits a response signal to the sensor slave unit 8 and transmits a determination signal to each indoor slave unit 10 (step S142). As a result, a communication path is established between the registration-destination mobile phone and the sensor slave unit 8.

  If the answer to the determination in step S140 is no, it is determined whether the response button switch 4c of the parent device 4 has been pressed (step S144). If the answer to this determination is yes, base unit 4 transmits a response signal to sensor slave unit 8 and transmits a determination signal to each indoor unit 10 (step S146). As a result, a communication path is established between the parent device 4 and the sensor slave device 8.

  If the answer to the determination in step S144 is no, it is determined whether any of the indoor child devices 10 has received a signal indicating that the response button switch 10a has been pressed (step S148). If the answer to this determination is yes, the parent device 4 transmits a response signal to the sensor slave device 8 (step S150). As a result, a communication path is established between the indoor slave unit 10 and the sensor slave unit 8.

  If the answer to the determination in step S148 is no, it is determined whether the call has been made for a predetermined number of times at the registration destination (step S152). If the answer to this determination is no, the process is executed again from step S138. If the answer to the determination in step S152 is yes, it is determined whether there is a next registration destination (step S154). If the answer to this determination is yes, a call is made to the next registration destination (step S156), and the process is executed again from step S138. If the answer to the determination in step S156 is no, it is determined whether the predetermined number of redials has been redialed (step S158). If the answer to the determination is no, the process is executed again from step S156. If the answer to the determination in step S158 is yes, the parent device 4 enters a standby state and the sensor slave device 8 returns to the sleep state (step S160). In this way, calling the registration destination mobile phone, the base unit 4 and the indoor unit 10 in order is repeated, and a communication path is established between the sensor unit 8 that responds first and the sensor unit 8 in between. The situation can be grasped by threatening an intruder in the vicinity of the machine 8 or listening to the sound from the microphone of the sensor slave unit 8.

  In the sensor alarm operation process of the indoor unit 10, as shown in FIG. 12, the alarm lamp 10 f of each indoor unit 10 is caused to blink, and an alarm is sounded for 1 minute (step S <b> 162). Following this, it is determined whether the response button switch 10a of any indoor unit 10 has been operated (step S164). If the answer to this determination is no, it is determined whether a signal indicating that the registration destination or the base unit 4 has responded has been received from the base unit 4 (step S166). If the answer to this determination is no, step S164 is executed again. If the answer to the determination in step S166 is yes, each handset 10 returns to the standby state (step S168).

  If the answer to the determination in step S164 is yes, a signal indicating that the response button switch 10a has been operated is transmitted to the parent device 4 (step S170), and the parent device 4 transmits a stop signal to the remaining indoor child devices 10. (Step S172). As a result, the indoor slave unit 10 and the sensor slave unit 8 are ready to talk. Further, the remaining indoor child devices 10 return to the standby state (step S174).

  In addition to this, in this intercom, the main unit is called from the indoor unit 10 to make a call, or each indoor unit 10 is called from the main unit 4 at the same time, and the indoor unit 10 and the main unit that responded first of all. A call is made between the mobile unit 4, a specific handset is called from the base unit 4, a call is made between the specific handset and the base unit 4, and the indoor handset 10 is connected with each other via the base unit 4. You can also make calls.

  In the above-described embodiment, a call between the entrance slave unit 6 and the master unit 4, a call between the master unit 4 and each indoor slave unit 10, and a call between the sensor slave unit 8 and the master unit 4 are performed wirelessly. Although configured, it can also be a wired call. In the above-described embodiment, the sensor slave unit 8 and the indoor slave unit 10 are provided. However, these can be removed depending on circumstances. In the above embodiment, a mobile phone is used. However, the present invention is not limited to this. For example, a predetermined fixed telephone can be used.

It is a block diagram of the intercom of one embodiment of the present invention. It is a main flowchart of each subunit | mobile_unit of the intercom of FIG. It is a main flowchart of the main | base station of the intercom of FIG. It is a detailed flowchart of the panic alarm operation | movement of FIG. It is a detailed flowchart of the indoor child device panic alarm operation of FIG. FIG. 4 is a detailed flowchart of an operation of calling the front door slave in FIG. 3. It is a detailed flowchart of the going-out mode of FIG. FIG. 8 is a detailed flowchart of an entrance handset calling operation of the indoor handset shown in FIG. 7. It is a detailed flowchart of the stay mode of FIG. It is a detailed flowchart of the sensor alarm operation | movement of FIG. 11 is a detailed flowchart of a sensor alarm ON operation of FIG. 10. It is a detailed flowchart of the sensor alarm operation | movement of the indoor subunit | mobile_unit of FIG.

Explanation of symbols

4 Master unit 6 Entrance slave unit (external slave unit)
10 indoor cordless handsets
12 Panic button (emergency cordless handset)
16 Mobile phone (external call device)

Claims (5)

A master unit installed inside the house and capable of talking with an external communication device outside the house;
An external slave installed outside the house and capable of talking with the master;
An emergency slave unit that is arranged inside the house and is capable of wireless communication with the master unit,
The master unit, when a call is made from the emergency slave unit, calls the external call device and activates a call notification means provided in the master unit, and a response from the external call device and the master unit An intercom that enables a device that has responded first to make a call with the emergency cordless handset among the responses by the operation of the call response means included in the device.   2. The intercom according to claim 1, further comprising: a residential slave unit that can communicate with the master unit in the house, wherein the master unit is also configured to receive a call from the emergency slave unit. The device that responds first among these responses, including the response from the external communication device and the response by the operation of the call response means of the parent device, as well as the response of the child device in the house. Is an intercom that can communicate with the emergency cordless handset. A master unit installed inside the house and capable of talking with an external communication device outside the house;
An external slave installed outside the house and capable of talking with the master;
An emergency slave unit that is arranged inside the house and is capable of wireless communication with the master unit,
Including, a state in which the parent device can communicate with the external child device, and a state in which the external calling device and the external child device can communicate with each other via the parent device, When there is a call from the emergency handset, the base unit calls the external call device and activates call notification means provided in the base unit, and the response from the external call device and the base unit An intercom that enables a device that has previously responded to make a call with the emergency handset out of responses by an operation of a call response means provided.   4. The intercom according to claim 3, further comprising: a residential slave unit that can communicate with the master unit in the house, wherein the master unit is also configured to receive a call from the emergency slave unit. The device that responds first among these responses, including the response from the external communication device and the response by the operation of the call response means of the parent device, as well as the response of the child device in the house. Is an intercom that can communicate with the emergency cordless handset.   5. The interphone according to claim 1, wherein a plurality of the external call devices are installed, and the base unit sequentially calls the plurality of external call devices.

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