JP2011135494A - Intercom system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intercom system capable of dealing with a suspicious person, who may frequently appear on a road around a house by expanding a crime prevention function of the intercom system, and further including a function of recording video images. <P>SOLUTION: In an entrance slave unit 1, a radio receiving section 17 is provided for receiving a signal transmitted from a portable transmitter 3 which is carried for crime prevention with an unspecific person and transmits a specific radio signal according to a predetermined operation. In a sitting room master unit 2, a master unit CPU 34 is provided for driving a camera 13 upon reception of the specific radio signal with the radio receiving section 17, recording a video image captured in a video recording memory 27, and emitting warning sounds different from call sounds to be emitted in calling from the entrance slave unit 1 and the sitting room master unit 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an intercom system, and more particularly, to an intercom system having a function of performing recording and threatening operations when a suspicious person appears near a dwelling unit where the interphone system is installed.

  Conventionally, there is an intercom system that records an audible alarm or activates a camera when a suspicious person appears at the entrance of a dwelling unit. For example, in Patent Document 1, when a suspicious person appears, the sensor camera is activated to start imaging, and the room master unit records the video. A warning sound was emitted from the master unit in the room, and a threatening sound was issued from the entrance unit.

JP 2009-272819 A

In the above conventional intercom system, the sensor camera operates by detecting all approaching persons. Therefore, if the resident is not a suspicious person, for example, a resident is devised to discriminate from the image so that it does not operate. When it entered the site, it was detected and recorded.
On the other hand, there is a problem that vulnerable people such as children and women are caught or attacked by suspicious persons while traveling, and measures to prevent it are desired.
However, the intercom system connected to the sensor camera was able to carry out threats when a suspicious person entered the premises of a dwelling unit. It was not possible to protect the vulnerable people from suspicious individuals.

  Therefore, the present invention has been made to solve such problems, and the security function of the intercom system can be extended to respond to suspicious persons appearing on the roads around the dwelling units, and still record images. It aims at providing the intercom system with the function to do.

In order to solve the above-mentioned problems, the invention of claim 1 includes an entrance cordless device for a visitor to call a resident and make a call, and an occupant installed in the dwelling unit from the entrance cordless handset. A home base unit for responding to the call, the entrance sub unit includes a camera for imaging the visitor, and the home base unit includes a monitor for displaying the captured image of the camera, and a recording memory for recording. The entrance cordless handset has a radio receiving unit that receives a specific radio signal transmitted from a portable transmitter carried by an unspecified passer for crime prevention. When the wireless receiving unit receives a specific wireless signal, the camera drives the camera to record the captured image in the recording memory, and further generates an alarm sound different from the ringing sound reported at the time of calling, At least from the parent machine It characterized by having a very operation control unit to sound.
According to this configuration, recording or warning is started by receiving a specific radio signal. Therefore, even if a suspicious person does not enter the site, it can be used as a suspicious person's identification or crime evidence by recording. Moreover, the resident can recognize that there is a suspicious person nearby, and it is easy to ensure the safety of the whistleblower.

According to a second aspect of the present invention, in the configuration of the first aspect, the room master unit includes a timer that starts counting a predetermined time when the specific radio signal is received, while the portable transmitter transmits the specific radio signal. In addition to the notification button to be sent, a cancel button for sending a cancel signal for canceling the notification by this signal is provided, and the emergency operation control unit, after receiving a specific radio signal by the radio reception unit, elapses a predetermined time. The system is characterized in that it waits to record and issue a warning sound, and shifts to a standby state when a cancel signal is received before a predetermined time elapses, and thereafter does not perform recording and a warning sound.
According to this configuration, even if the intercom receives a report, neither recording nor alarming is performed for a certain period of time. If the cancel operation is performed within the time, the intercom side will not perform the alarm operation. Therefore, the resident is not inconvenienced by an erroneous operation.

According to a third aspect of the present invention, in the configuration according to the first aspect, the room master unit includes a delay timer that starts measuring a predetermined time when the specific radio signal is received, while the portable transmitter transmits the specific radio signal. In addition to a notification button for transmitting a signal, a cancel button for transmitting a cancel signal for canceling the notification by this signal is provided. When the emergency operation control unit receives a specific wireless signal by the wireless reception unit, While the alarm sound is issued, the recording and the alarm sound of the master unit are performed after a predetermined time has elapsed by the delay timer, and when the cancel signal is received before the predetermined time elapses, the standby state is established. The alarm sound of the entrance cordless handset is stopped, and after that, the recording and the warning sound of the room master are not performed.
According to this configuration, the intercom side receives a report from the portable transmitter, and an alarm sound is immediately reported from the entrance terminal. Therefore, reports to passers-by and passports against suspicious persons are effective.
On the other hand, since the home base unit does not record or issue alarms for a certain period of time, even if the reporter operating the mobile transmitter misoperates and performs the report operation, the cancel operation can be performed within the specified time. In the case of the base unit in the room, no alarm is issued. Therefore, the resident is not inconvenienced by an erroneous operation.

According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the entrance cordless handset has illumination means for enabling night imaging of the camera, and the emergency operation control unit is a wireless receiver. When the unit receives a specific wireless signal, the lighting unit is controlled to blink.
According to this configuration, it is possible to threaten a suspicious person with light in addition to sound.

According to a fifth aspect of the present invention, in the configuration according to the fourth aspect, the emergency operation control unit records an image captured by the camera as an image in synchronization with the blinking cycle of the illumination unit.
According to this configuration, it is possible to record a bright image in synchronism with the blinking of the lighting as an alarm even at night, so that it is possible to record in a good imaging state.

According to a sixth aspect of the present invention, in the configuration according to the fifth aspect, the entrance cordless handset has an illuminance sensor for causing the illumination means to function as night illumination, and the emergency operation control unit is based on information of the illuminance sensor. When it is bright, it is recorded as a moving image, and when it is dark, it is recorded as an image.
According to this configuration, recording is performed in a daytime that does not require lighting, and in a nighttime when lighting is required, recording is performed as a still image in accordance with the blinking period of the warning light, thereby making use of the shooting environment for efficient recording. be able to.

According to a seventh aspect of the present invention, in the configuration according to the first aspect, the room master has a recording start timer that starts counting a predetermined time when a specific wireless signal is received, and the emergency operation control unit The recording is started when a predetermined time by the recording start timer elapses after the unit receives a specific wireless signal.
According to this configuration, the recording start timing can be set in consideration of the receivable distance, and the recording can be started at the timing of passing in front of the entrance.

According to an eighth aspect of the present invention, in the configuration according to any one of the first to seventh aspects, the room base unit starts counting when a specific wireless signal is received or when recording and / or alarm sound is started. The emergency operation control unit has an end timer that ends the operation and shifts to a standby state when the count for a predetermined time is completed.
According to this configuration, even if the resident is away, he / she receives a report, performs recording, etc., and then automatically shifts to a standby state. It ’s not easy to use.

According to a ninth aspect of the present invention, in the configuration according to any one of the first to seventh aspects, the living room base unit starts counting when receiving a specific radio signal or starting to issue an alarm sound for a certain period of time. It is characterized by a ringing stop timer that stops only the alarm sound of the living room master unit when the counting is completed.
According to this configuration, the alarm sound on the side of the living room base unit stops after a certain period of time, so the burden on the resident can be reduced. On the other hand, since other alarm operations and recording are continued, the security function can be maintained.

According to a tenth aspect of the present invention, in the configuration according to any one of the first to seventh aspects, the emergency operation control unit stops the alarm sound of the room master unit at the end of the recording.
According to this configuration, since the alarm sound on the master unit stops at the end of recording, the end of recording can be recognized.

According to an eleventh aspect of the present invention, in the configuration according to any one of the first to tenth aspects, the emergency operation control unit performs a predetermined erasure prohibition process on a video recorded by receiving a specific radio signal, and It is characterized in that it cannot be erased by a normal erase operation of the master unit.
According to this configuration, since the recorded video by the notification is protected, it is possible to prevent a situation in which the resident easily deletes.

According to a twelfth aspect of the present invention, in the configuration according to any one of the first to eleventh aspects, the living room base unit has a communication interface for connecting to a communication network, and can communicate with an external storage means separately connected to the communication network. The emergency operation control unit starts communication with the external storage unit when receiving a specific radio signal, and transmits video to the external storage unit in addition to the recording memory to perform recording. .
According to this configuration, since the recording is performed on the external storage unit provided outside via the communication network, it is possible to leave the imaging data even when the recording at the parent unit is deleted. Moreover, if an external storage means is installed in a security company or the like, suspicious person images can be managed in a lump and effective use can be achieved.

  According to the present invention, recording and warning are started by receiving a specific wireless signal, so that even if a suspicious person does not enter the site, it can be used as a suspicious person's identification or crime evidence. Can do. Moreover, the resident can recognize that there is a suspicious person nearby, and it is easy to ensure the safety of the whistleblower.

It is a block diagram which shows an example of the intercom system which concerns on this invention. It is a circuit block diagram of an entrance child machine and a living room parent machine. It is a circuit block diagram of a portable transmitter. It is a block diagram which shows the other example of the intercom system of this invention.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram showing an example of an intercom system according to the present invention, wherein 1 is an entrance cordless device for a visitor to call a resident and 2 is installed in a dwelling unit. 3 is a portable transmitter for reporting when a person traveling on the road discovers a suspicious person or is followed by a suspicious person. is there. The entrance cordless handset 1 is connected to the living room base phone 2 via the transmission line L1.
P denotes a pedestrian walking on the road, F denotes a suspicious person, and H1, H2,... Each denote a dwelling unit in which the interphone system of the present invention is installed. Reference numeral 4 denotes an emergency button for reporting an emergency at the entrance instead of the portable transmitter, and is connected to the entrance cordless handset 1.

  The entrance child device 1 and the living room parent device 2 are configured as shown in the circuit block diagram of FIG. The entrance cordless handset 1 includes a call button 11 for a visitor to call a resident, a microphone 12a for calling, a speaker 12b, a call circuit 12 for controlling the microphone 12a and the speaker 12b, a road at the entrance in addition to the visitor. A camera 13 for imaging a suspicious person or a reporter who passes by, a video processing unit 14 for performing modulation processing of a video captured by the camera 13, an illuminance sensor 15 for detecting illuminance, and enabling imaging by the camera 13 at night A camera illumination 16 for performing the operation, a wireless reception unit 17 for receiving radio waves transmitted from the portable transmitter 3, a slave unit IF 18 for communicating with the living room master unit 2, and a slave unit CPU 19 for controlling the entire entrance slave unit 1 Etc.

  The room master 2 controls the operation unit 21 configured with a touch panel, hard buttons, and the like for operations such as call operations and various settings, a microphone 22a, a speaker 22b, a microphone 22a, and a speaker 22b for calling with a visitor. The telephone 24, the monitor 24 for displaying the video imaged by the camera 13 of the entrance unit 1, the video processing unit 25 for performing the demodulation processing of the video signal transmitted from the entrance unit 1, the video or the image is recorded. A recording memory 27 for recording, a sound memory 28 for reporting a threatening sound such as a sound or a siren sound using the speaker 12b of the entrance cordless handset 1, a timer 29 for counting a recording start timing or a recording end A setting storage unit 30 for storing absence settings such as automatically recording a visitor video when absent, other information set by the operation unit 21, a message to a family, etc. In order to communicate with the new arrival display unit 31 for notifying that there is new arrival information such as a message for the message, the emergency display unit 32 for notifying that there is a recording due to radio wave reception from the portable transmitter 3, and the entrance unit 1 The base unit IF33 and the base unit CPU 34 for controlling the entire room base unit 2 are provided.

  FIG. 3 shows a circuit block diagram of the portable transmitter 3. As shown in FIG. 3, when the portable transmitter 3 encounters a suspicious person, the portable transmitter 3 transmits a specific radio signal to notify a notification button 36 and a predetermined cancel signal for canceling the notification. A cancel button 37, a transmitter 38 that transmits a specific radio signal or cancel signal as a radio wave, a transmitter CPU 39 that controls the portable transmitter 3, and the like are provided.

  The operation of the intercom system configured as described above will be described below. However, the operation of calling the resident by the visitor and the operation of displaying the visitor video on the monitor 24 by the call operation are the same as in the prior art, so the explanation is omitted. The operation when a person operates the portable transmitter 3 carried by a passerby will be described.

First, as shown in FIG. 1, the intercom system having the above configuration is installed in a plurality of dwelling units H1, H2,... 3 is carried. In this situation, when the notification button 36 of the transmitter 3 carried by a passerby who has encountered a suspicious person is operated, the transmitter CPU 39 detects this and detects a specific from the transmitter 38 of the portable transmitter 3. A wireless signal (suspicious person notification signal) is transmitted. This radio wave is transmitted with a relatively weak radio wave, for example, with an output that is difficult to receive when it is 20 meters or more away.
The radio wave transmitted from the portable transmitter 3 is received by the wireless receiving unit 17 of the nearby entrance slave unit 1, and transmits the suspicious person notification signal received by the slave CPU 19 to the room master unit 2. At this time, all the entrance cordless handsets 1 within the receivable range receive and similarly send to the room base phone 2.

In the room base unit 2 that has received the suspicious person notification signal, the base unit CPU 34 performs the following operations.
A camera activation signal for activating the camera 13 of the entrance unit 1 is transmitted to the entrance unit 1 at a predetermined timing. Upon receiving this signal, the entrance slave unit 1 starts image capturing by the camera 13 under the control of the slave CPU 20 and transmits the captured image to the room master unit 2. The captured image of the camera 13 transmitted to the room master 2 is displayed on the monitor 24 and simultaneously recorded in the recording memory 27. Thereafter, when the recording is completed, the emergency display unit 32 is turned on.
Furthermore, an alarm sound is sounded at timings set from the speaker 12b of the front door unit 1 and the speaker 22b of the living room base unit 2, and the camera illumination 16a is blinked to intimidate with light.

  The recorded video in this operation, that is, the video recorded in response to the suspicious person notification signal is automatically protected by setting a special flag or the like, so that the resident can operate the room master unit 2 or perform subsequent recording. Overwriting due to insufficient recording area in the memory 27 is prohibited.

  Thus, even if a suspicious person does not approach the site, it becomes possible to record the suspicious person, which can be used as identification of the suspicious person or evidence of crime. In addition, it is possible to ensure the safety of the reporter by issuing a warning to the suspicious person or reporting to the resident.

  Next, the recording and warning when receiving a suspicious person notification signal will be described in detail. The master CPU 34 that has received the suspicious person notification signal starts the timer 29 first. The timer 29 functions as a delay timer for starting recording and issuing an alarm sound in the entrance slave unit 1 and the living room master unit 2 when a certain time such as 10 seconds elapses.

Due to this delay timer operation, even if the reporter misoperates the portable transmitter 3, since the alarm sound is not issued and recorded for a certain period of time, the reporter sends a cancel signal by performing a cancel operation during this period, By receiving this via the same route as the suspicious person report signal, the base unit CPU 34 can recognize that it is a false report, cancel the alarm operation, and do not bother the resident.
In addition, it usually takes a certain amount of time from when a suspicious person notification signal is received until the suspicious person passes the entrance, so this delay will not miss the recording timing of the suspicious person. The memory 27 can also be used effectively.

In this case, the alarm using the speaker 12b of the front door 1 may be issued as soon as the suspicious person notification signal is received without delay. If it is not a false alarm, the alarm can be promptly notified to the passerby. Intimidation against suspicious persons works effectively. Moreover, even if it is a false report, the living room base unit 2 does not report, so that the resident is not inconvenienced.
On the contrary, the timer 29 is used as a recording start timer that delays only the recording timing, and other alarm operations are performed without delay. As described above, after passing the suspicious person notification signal, it is considered that the vehicle passes through the front door. Only the start of recording may be delayed in consideration of time.

  The recording is also performed at night. Specifically, the video captured by the camera 13 is recorded as a moving image during bright daytime, but in dark conditions such as at night, recording is performed using a threatening action that causes the camera illumination 16 to blink, and the still image synchronized with the blinking of the camera illumination 16 is recorded. Record a picture. When the slave CPU 19 receives the detection signal of the illuminance sensor 15 and recognizes that it is nighttime, the master CPU 34 is notified and an image synchronized with the camera illumination 16 is recorded in the recording memory 27.

  As a result, video is recorded during bright daytime, and a bright image is recorded when illumination is applied when it is dark such as at night, so that it can be recorded in a good imaging state and there is no waste using the shooting environment. You can record. However, at night at the time of normal calling, recording by moving images can be performed in the same way as in the daytime by stopping the blinking and always lighting.

  After that, that is, when the timer 29 counts a predetermined time of 120 seconds, for example, after receiving the suspicious person notification signal, the recording and the alarm operation in the room master unit 2 are terminated. In this way, the alarm sound on the master side stops at the end of recording, so that the resident can recognize the end of recording.

In addition, the alarm operation etc. of the entrance cordless handset 1 may be terminated, and the whole system may be shifted to a standby state. Since the system automatically shifts to the standby state, the crime prevention function will not be wasted and the usability will not be deteriorated.
In addition, in this end operation, only the alarm sound of the room master unit 2 may be stopped, and the alarm sound and recording of the door station unit 1 may be continued. Since the sound stops, the burden on the resident can be reduced. On the other hand, since other alarm operations and recording are continued, the security function can be maintained. In this case, the stop of the alarm operation by the entrance cordless handset 1 may be configured to return to standby, for example, by a special operation (such as long pressing of a call button) on the entrance cordless handset 1.
Furthermore, although the timer 29 is used to delay the recording and alarming, it is of course possible to immediately start recording or the like, and the camera illumination 16 is used intimidatingly. In this case, it can be used for recording at night.
In addition, the portable transmitter 3 may be configured to report an alarm sound by itself by operating the notification button 36, which is a threat to a suspicious person, and that the reporter is functioning in the portable transmitter 3. Can be recognized.

  The configuration diagram of FIG. 4 shows another embodiment of the intercom system of the present invention, and shows a configuration in which a plurality of intercom systems are connected to a server via a communication network. 5 is a server, 6 is a mobile phone, 7 is a base station for communicating with the mobile phone 6, and N is a communication network. Each living room base unit 2 has a built-in communication IF (not shown) for connection to the communication network N.

  Since the operation of each intercom system is as described above, the description thereof is omitted, and here, the operation of the server 5 will be mainly described. However, in the room base unit 2 that has received the suspicious person report signal, the base unit CPU 34 transmits the suspicious person report signal together with the room base unit ID to the server 5 via the communication network N, and the video information captured by the camera 13. Is also configured to transmit.

  The server 5 stores the map information of the area and the location information of each dwelling unit in addition to the ID information of the entrance cordless handset 1 or the living room base phone 2, and is configured so that the location reported by the reporter can be identified. That is, when the reporter operates the portable transmitter 3, as described above, the suspicious person report signal is received by the entrance slave unit 1 and is notified to the room master unit 2, and the room master unit 2 is connected to the server via the communication network N. A suspicious person report signal is transmitted to the room ID together with the room ID. In this way, the server 5 can identify the place where the suspicious person exists based on the information transmitted from the plurality of living room masters.

  At this time, an image captured by the camera 13 of each entrance slave unit 1 is also transmitted to the server 5 via the communication network N and recorded. Further, the server 5 is registered with the number of the mobile phone 6 of the security company or the self-government chairman who is notified when the suspicious person notification signal is received, and the server 5 sends a mail notification or call to the mobile phone 6. And report action.

Thereby, for example, a security company or the like that manages the server 5 can promptly go to that place and can take quick action. Further, the suspicious person's video can be collectively managed by the server 5 and can be used effectively, and it is possible to cope with the case where the recorded image is deleted on the room master unit 2 side.
Furthermore, it is possible to promptly respond by notifying the security company by e-mail or calling, or by notifying the self-government chairman living in the area.

In the above-described embodiment, when there is a message memo or a new arrival due to a visitor while the room 2 is absent, the new arrival display unit 31 is turned on to prompt confirmation of new arrival information. For this reason, the emergency display unit 32 that emits light in response to an emergency recording makes it easier for the resident to recognize by emitting light with a stronger light intensity than the new arrival display unit 31 or displaying an icon on the monitor 24. It is good to operate.
In addition, a person detection circuit that detects a person from the captured image of the camera 13 may be provided so that zoom processing is performed when a person is detected. It is also possible to confirm the direction in which the suspicious person escaped by verifying it compared with the recording time of the room master of the dwelling unit.
Furthermore, if the video recorded by the room master 2 or the server 5 can be transferred to the mobile phone 6 separately, information can be easily provided to the police and the like.
Further, the alarm sound notified from the entrance cordless handset 1 or the living room base phone 2 may be a voice message such as “Confirming suspicious person!” “Switched to a warning state”.
Further, as a countermeasure when a passerby forgets the portable transmitter 3, an emergency button 4 is separately connected to the front door 1 as shown in FIG. 1, and the operation similar to the above is performed by pressing this emergency button. It may be possible.

  1 .. Entrance cordless handset, 2 .... Living room master, 3 .... Portable transmitter, 5 .... Server (external storage means), 13. Camera, 15 .... Illuminance sensor, 16 .... Camera illumination (lighting means) ), 17 .. Wireless receiver, 19 .. Remote CPU, 21 .. Operation unit, 24 .. Monitor, 27 .. Recording memory, 29 .. Timer (Recording start timer, delay timer, end timer, ringing stop) Timer), 30 ... Setting storage unit, 32 ... Emergency display unit, 34 ... Master unit CPU (emergency operation control unit), 36 ... Notification button, 37 ... Cancel button.

Claims (12)

There is an entrance cordless device installed at the entrance for a visitor to call the resident to make a call, and a living room set up in the dwelling unit for the resident to respond to the call from the entrance cordless device. The intercom system is provided with a camera for capturing the visitor in the entrance unit and a monitor for displaying the captured image of the camera and a recording memory for recording the room base unit,
The entrance cordless handset has a radio reception unit that receives a specific radio signal transmitted from a portable transmitter that an unspecified passerby carries for crime prevention,
When the wireless reception unit receives the specific wireless signal, the living room master drives the camera to record the captured image in the recording memory, and further alerts different from the ringing sound that is reported at the time of calling. An intercom system, comprising: an emergency operation control unit that outputs a sound from at least one of the entrance slave unit and the living room master unit. The living room base unit includes a timer that starts measuring a predetermined time when the specific radio signal is received, while the portable transmitter is notified by this signal in addition to a notification button for transmitting the specific radio signal. It has a cancel button that sends a cancel signal to cancel
The emergency operation control unit, upon receiving the specific radio signal at the radio reception unit, waits for the elapse of the predetermined time to perform recording and alarm sound, and before the predetermined time elapses, 2. The intercom system according to claim 1, wherein when the cancel signal is received, the system is shifted to a standby state, and thereafter recording and alarm sound are not performed. The living room base unit includes a delay timer that starts counting a predetermined time when the specific radio signal is received, while the portable transmitter is based on this signal in addition to a notification button for transmitting the specific radio signal. It has a cancel button that sends a cancel signal to cancel the notification,
The emergency operation control unit, when receiving the specific radio signal at the radio reception unit, causes an alarm sound to be issued from the entrance cordless handset, while the recording and the alarm sound of the living room base unit are Waiting for the elapse of a predetermined time by a delay timer, and when the cancel signal is received before the elapse of the predetermined time, transition to a standby state, stop the alarm sound of the entrance unit, and then record and 2. The intercom system according to claim 1, wherein the alarm sound of the living room base unit is not executed. The entrance cordless handset has illumination means for enabling night imaging of the camera,
The intercom system according to any one of claims 1 to 3, wherein the emergency operation control unit controls the lighting unit to blink when the radio reception unit receives the specific radio signal. The intercom system according to claim 4, wherein the emergency operation control unit records an image captured by the camera as an image in synchronization with a blinking cycle of the illumination unit. The entrance unit has an illuminance sensor for causing the illumination means to function as night illumination,
6. The intercom system according to claim 5, wherein the emergency operation control unit records a moving image when bright and records an image when dark based on information of the illuminance sensor. The living room master unit has a recording start timer that starts measuring a predetermined time when the specific radio signal is received,
The intercom system according to claim 1, wherein the emergency operation control unit starts recording when a predetermined time by the recording start timer elapses after the wireless receiving unit receives the specific wireless signal. The room master starts counting when it receives the specific radio signal or starts recording and / or alarm sounding, and the emergency operation control unit ends the operation when the counting of a certain time is completed. The intercom system according to claim 1, further comprising an end timer that shifts to a standby state. The living room base unit starts counting when receiving the specific radio signal or starting alarm sounding, and stops ringing only the alarm sound of the living room base unit when counting for a certain period of time is completed. The intercom system according to any one of claims 1 to 7, further comprising a stop timer. The intercom system according to any one of claims 1 to 7, wherein the emergency operation control unit stops the alarm sound of the living room master unit at the end of recording. The emergency operation control unit performs predetermined erasure prohibition processing on video recorded by receiving a specific wireless signal, and cannot be erased by a normal erasure operation of the room master unit. The intercom system according to any one of 10. The living room base unit has a communication interface for connecting to a communication network, and can communicate with external storage means separately connected to the communication network,
The emergency operation control unit starts communication with the external storage unit when receiving the specific radio signal, and transmits video to the external storage unit in addition to the recording memory to perform recording. The intercom system according to any one of claims 1 to 11.

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