Intercom system

Abstract

To provide an intercom system that posts image data at an entrance instead of an entrance slave unit to enable a visitor to call a resident using the image data.SOLUTION: An intercom system includes a mobile terminal 10 carried by a visitor, a communication terminal 20 operated by a resident, a server 40 that manages communication between the two, and image data 30 posted at an entrance to call the communication terminal 10. The mobile terminal 10 has a function of reading the image data by imaging the image data with a camera 11. The server 40 stores association between the image data 30 and a specific communication terminal 20, and SSID information obtained by associating each communication terminal 20 with a specific access point. The mobile terminal 10 accesses the server 40 based on information of the image data 30 to obtain web information, thereby making it possible to call the communication terminal 20 from the web information. If the mobile terminal 10 has not received the SSID stored in association with the communication terminal 20, the server 40 does not permit the communication terminal 20 to be called.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an intercom system in which a visitor can call a resident, and more particularly to an intercom system in which a visitor can call a resident without providing an intercom device for calling at the entrance.

Background Art

[0002] In an intercom system for calling a resident, an intercom handset for calling a resident is installed at the entrance, and an intercom master unit for responding to a call is installed inside the dwelling unit. Thus, when a visitor operates the intercom handset to make a call, the intercom master unit emits a ringing sound, and the resident can talk by operating the intercom master unit in response.

[0003] On the other hand, in recent years, mobile terminals such as mobile phones have become widespread, and it has become common for visitors to carry mobile terminals when visiting. In view of this situation, a technology for using a mobile terminal instead of an intercom handset has been considered. For example, Patent Document 1 discloses a technology for a system in which a company or the like notifies a person in charge that a visitor has arrived. A QR code (registered trademark) is placed at the reception area of a company or the like, and when a visitor captures the QR code (registered trademark) with a mobile terminal, the person in charge can be called. This is a configuration in which the mobile terminal accesses a server by reading a QR code (registered trademark), and web information associated with the QR code (registered trademark) is returned from the server and displayed. By the visitor performing an input operation such as entering a password according to this display, a notification of a visitor is made to the terminal of the person in charge of the visited destination. In this way, it is not necessary to install a device for calling such as an intercom handset at the reception area.

[0004] Also, in Cited Document 1, the server obtains the position information of the mobile terminal called by the call operation based on GPS information, and performs processing to not accept calls from a location completely different from the reception area. By applying such a restriction, the occurrence of calls not related to subsequent misoperations of the visitor is prevented.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The technology disclosed in the above Patent Document 1 can eliminate the equipment for calling for reception by companies and the like, so cost reduction can be achieved. However, when considering the application of this technology to an intercom in a general household, the restriction by the GPS location information may malfunction indoors, and since GPS spoofing is possible, the presence of malicious visitors or mischievous people cannot be ignored, and it was necessary to construct a further security enhancement mechanism.

[0007] Therefore, in view of such problems, the present invention aims to provide an intercom system that can post image data at the entrance instead of the intercom sub-unit, and based on this image data, a visitor can call a resident using the device they carry, and moreover, security can be maintained without using the GPS location information.

Means for Solving the Problems

[0008] In order to solve the above problems, a first configuration of the present invention is an intercom system having a mobile terminal carried by a visitor having a function of communicating with an external device via a public communication network, a communication terminal operated by a resident having a function of communicating with an external device via a public communication network, and a server for managing communication between the mobile terminal and the communication terminal. Image data for calling the communication terminal using the mobile terminal is posted at the entrance. The mobile terminal has a call function, a camera, and a function of reading the image data by imaging with the camera. Further, the server has a call destination information storage unit for storing the association between the image data and a specific communication terminal, and an SSID information storage unit for associating a specific wireless LAN access point with each communication terminal and storing the SSID information thereof. When the mobile terminal reads the image data, it accesses the server based on the information of the image data, obtains Web information for calling the communication terminal associated with the image data from the server, and can call the communication terminal from the Web information. On the other hand, the server transmits the Web information to the accessed mobile terminal, and at the same time, obtains the SSID information received by the mobile terminal from the mobile terminal. If there is no SSID registered in the server in association with the communication terminal among the obtained information, it does not permit the mobile terminal to call the communication terminal based on the Web information. According to this configuration, the visitor can use the mobile terminal carried by himself / herself to image the image data posted at the entrance, so that the resident can be called even if there is no intercom device at the entrance. Moreover, if there is no SSID registered in the server in association with the communication terminal among the SSIDs of the wireless LAN access points received by the mobile terminal, the call is not permitted. That is, if the registered SSID is a signal transmitted from the destination or its vicinity, the resident cannot be called even if the Web information is obtained unless the user is near the destination household. Therefore, without using GPS, the position of the caller can be limited, and calls from malicious visitors such as suspicious persons can be restricted, maintaining security.

[0009] The second configuration of the present invention is an intercom system having a mobile terminal carried by a visitor having a function of communicating with an external device via a public communication network, a communication terminal carried by a resident having a function of communicating with the mobile terminal via the public communication network, and a server for managing communication between the mobile terminal and the communication terminal. Image data for calling the communication terminal using the mobile terminal is posted at the entrance. The mobile terminal has a call function, a camera, and a function of reading the image data by imaging it with the camera. Further, the server has a call destination information storage unit for storing the association between the image data and a specific communication terminal, and a beacon information storage unit for associating a specific Bluetooth (registered trademark) transmitting terminal with each communication terminal and storing its beacon ID information. When the mobile terminal reads the image data, it accesses the server based on the information of the image data, obtains Web information for calling the communication terminal associated with the image data from the server, and can call the communication terminal from the Web information. On the other hand, the server transmits the Web information to the accessed mobile terminal, and at the same time, obtains the beacon ID information received by the mobile terminal from the mobile terminal. If there is no beacon ID associated with the communication terminal in the obtained beacon ID information, it does not permit the mobile terminal to call the communication terminal based on the Web information. According to this configuration, the visitor can use the mobile terminal carried by himself / herself to image the image data posted at the entrance, so that the resident can be called even if there is no intercom device at the entrance. Moreover, if there is no beacon ID registered in the server in association with the communication terminal among the beacon ID information of the Bluetooth (registered trademark) transmitting terminal received by the mobile terminal, the call is not permitted. That is, if the registered beacon ID is the beacon ID of the Bluetooth (registered trademark) transmitting terminal transmitted from the vicinity of the visit destination, the resident cannot be called even if Web information is obtained unless the visitor is near the visit destination household. Therefore, without using GPS, the position of the caller can be limited, and calls from malicious visitors such as suspicious persons can be restricted, maintaining security.

[0010] Another aspect of the present invention is that, in the above configuration, the Web information transmitted from the server to the mobile terminal includes the information of a password that is valid only once. By using the password, a call to the communication terminal can be made from the mobile terminal. Once a call path is formed between the mobile terminal and the communication terminal, the password becomes invalid and the call cannot be made thereafter. According to this configuration, the call of the resident by the operation of reading the image data cannot be made after the first call. Therefore, mischief can be prevented.

Effect of the Invention

[0011] According to the present invention, a visitor can use a mobile terminal carried by himself / herself to capture the image data posted on the entrance door, so that the resident can be called. Therefore, even if there is no intercom device at the entrance door, the resident can be called. And according to the first configuration, if the SSID to be registered is a signal transmitted from the destination or its vicinity, the resident cannot be called even if the Web information is obtained unless the visitor is near the destination household. Therefore, without using GPS, the position of the caller can be limited and calls from malicious visitors such as suspicious persons can be restricted, and security can be maintained. Also according to the second configuration, if the beacon signal to be registered is the beacon signal of a Bluetooth (registered trademark) communication device transmitted from the destination or its vicinity, the resident cannot be called even if the Web information is obtained unless the visitor is near the destination household. Therefore, without using GPS, the area of the caller can be limited and calls from malicious visitors such as suspicious persons can be restricted, and security can be maintained.

Brief Description of the Drawings

[0012]

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Embodiments for Carrying Out the Invention

[0013] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a first form of an intercom system 1 according to the present invention. The intercom system 1 includes a mobile terminal 10 carried by a visitor, a communication terminal 20 carried by a resident or installed in a residential unit H, image data (two-dimensional code information) 30 posted at the entrance of the residential unit to obtain information of the communication terminal 20, a server 40 arranged on the cloud (on a public communication network N), a wireless LAN access point 50, and the like.

[0014] FIG. 2 shows a block diagram of the mobile terminal 10. As shown in FIG. 2, the mobile terminal 10 includes a camera 11, a display 12 for displaying various information, an operation unit 13 including a call button / end call button, etc., a memory 14 for storing received information and application software (hereinafter simply referred to as "app"), a communication unit 15, a wireless communication interface (wireless communication IF) 16 for wirelessly communicating with other devices via a public communication network, etc., and a mobile terminal CPU 17 for controlling these. The wireless communication IF16 has an antenna for wirelessly connecting to the public communication network N or performing short-range wireless communication such as Bluetooth (registered trademark) or Wi-Fi with nearby devices, and transmits and receives data to and from a server 40 or the like via the public communication network N. The data transmitted and received is, for example, video data, text data, or program data.

[0015] The image data 30 is, for example, a QR code (registered trademark), and has information for accessing the communication terminal 20 of the destination via the public communication network N. This image data 30 is posted on the entrance wall or the entrance door so that the visitor can capture it with a camera, and when the visitor captures it with the camera 11 of the mobile terminal 10 and captures the information, the URL information of the server 40 or the like is read. Note that the image data 30 is not limited to a QR code (registered trademark), and may be a barcode or a numeric string. Also, the public communication network N is, for example, the Internet or a telephone line.

[0016] In the mobile terminal 10, an application for reading the URL of the server 40 by capturing the posted image data 30 with the camera 11 and accessing the read URL is installed in advance. When the image data 30 is read by this application, it accesses the server 40, and a web page, which is web information associated with the destination household H, is transmitted from the server 40.

[0017] The display 12 is composed of an LCD and displays video, images, and character information. Also, the operation unit 13 consists of a touch panel and is integrated with the display 12, enabling various operations including a call operation. The mobile terminal 10 can be, for example, a multifunctional mobile phone (smartphone), but may also be a tablet-type terminal.

[0018] FIG. 3 shows a block diagram of the communication terminal 20. As shown in FIG. 3, the communication terminal 20 includes a display 21 for displaying various information, an operation unit 22 for performing various operations including a call button for responding to calls, a memory 23 for storing received information and applications, a call unit 24, a camera 25, a communication interface (communication IF) 26 for communicating wirelessly or wired with other devices via a public communication network N, etc., and a communication terminal CPU 27 for controlling these components. As the communication terminal 20, a device that can be carried and used by a resident such as a multifunctional mobile phone (smartphone) can be used, but it may also be a personal computer or a tablet-type general-purpose terminal. Furthermore, it may be a dedicated terminal fixedly installed indoors. By installing a predetermined application and registering a user with the server 40 through a predetermined operation, even a general-purpose terminal can function as the communication terminal 20. Note that in FIG. 1, a multifunctional mobile phone is used as the communication terminal 20.

[0019] FIG. 4 shows a block diagram of the server 40. As shown in FIG. 4, the server 40 includes a called party information storage unit 41 for storing a plurality of household information associating the image data 30 with the communication terminal 20, a call management unit 42 for storing conditions for restricting calls, an SSID information storage unit 43 for storing the association between the communication terminal 20 and the SSID of a wireless LAN access point (hereinafter simply referred to as "access point") 50, an image data generation unit 45 for generating the image data 30, a server communication interface (server communication IF) 46 for communicating with external devices via the public communication network N, and a server CPU 47 for controlling these components. Note that the SSID of the access point 50 to be stored is preferably the SSID of the access point 50 installed in the visited household, but it may also be the SSID of the access point 50 installed in the vicinity of the visited household, as long as the area of the mobile terminal 10 can be limited to the vicinity of the visited household H.

[0020] In the destination information storage unit 41, the association between the image data 30 of a plurality of residential units H and the communication terminal 20 is registered and stored. Further, information about the resident is also associated and stored in the information of the communication terminal 20.

[0021] The server CPU 47 receives an access from the mobile terminal 10 that has read the image data 30, selects the communication terminal 20 associated with the image data 30, that is, selects the communication terminal 20 of the destination residential unit H, returns a web page for calling the selected communication terminal 20 to the mobile terminal 10, and then controls the calling of the communication terminal 20 from the mobile terminal 10. However, it is determined whether the accessed mobile terminal 10 satisfies a predetermined condition. If the predetermined condition is not satisfied, even if the mobile terminal 10 performs a calling operation of the communication terminal 20 based on the web page, the control is performed so that the communication terminal 20 cannot be called.

[0022] Here, the image data 30 will be described. When the communication terminal 20 is registered, the server 40 generates user - dedicated image data 30 in the image data generation unit 45. This data is transmitted to the communication terminal 20. The resident who has obtained the image data 30 in this way posts it at the entrance, such as by printing. The URL information of the server 40 is registered in this image data 30. When the visitor captures the image data 30 with the camera 11 of the mobile terminal 10, the mobile terminal 10 reads the information, recognizes the URL of the server 40 and performs an access operation, and is transmitted to the server 40 together with the information of the image data 30 for identifying the communication terminal 20.

[0023] The access point 50 is a device that relays a wireless LAN and transmits an SSID (Wi - Fi signal), which is a signal for identification. The SSID is transmitted in the range of several tens of meters to several hundreds of meters.

[0024] The intercom system 1 configured as described above operates as follows. FIG. 5 is an operation transition diagram from when the mobile terminal 10 reads the image data 30 until a call is made and further a call is made. The description will be made with reference to FIG. 5. However, here, a case will be described in which control is performed to restrict the call under two conditions: SSID information and a one-time password that is valid only once. This setting condition is stored and managed in the call management unit 42.

[0025] When a visitor who has come to the destination household H takes an image of the image data 30 posted at the entrance with the mobile terminal 10 carried, the installed application reads the image data 30 and accesses the URL destination included in the read information. That is, it accesses the server 40 (S1).

[0026] The server 40 that has received the access from the mobile terminal 10 returns Web information (Web page) for calling the communication terminal 20 of the call destination associated with the image data 30 based on the information of the image data 30 transmitted from the mobile terminal 10 (S2). Specifically, it transmits the top page of the Web page for calling the communication terminal 20. The Web page transmitted at this time describes a password input section and a password. The mobile terminal 10 that has received the Web page from the server 40 displays the Web page (S3). Also, in accordance with the transmission of this Web page, the server 40 transmits a command for requesting the SSID information of the access point received by the mobile terminal 10 based on the conditions set in the call management unit 42.

[0027] FIG. 6 is an explanatory display diagram showing the Web page received by the mobile terminal 10 in this way. As shown in FIG. 6, a password input section B1 and a call button B2 are displayed on the display 12, together with a display for guiding the input of a password, a display of a one-time password, and a guide indicating that the camera 11 is activated to capture a face. In accordance with the display, when the visitor inputs the presented password and presses (touches) the call button B2 (S4), the password input to the call signal is attached, and further, the captured video of the camera 11 is transmitted to the server 40. At this time, based on the command, the SSID information received by the mobile terminal 10 is transmitted (S5) to the server 40 accordingly.

[0028] If a plurality of SSIDs are still being received, these multiple SSID information (a list of SSIDs) are transmitted. Also, when the password input section B1 is touched, the numeric keypad etc. is displayed and password input becomes possible.

[0029] At the server 40 where the SSID information is transmitted together with the call signal, the server CPU 47 makes the following judgment. First, it is judged whether the password is correct, and if it is correct, it is judged whether it is the first call (S6). If it is not the first time and it is a call operation made after a call path has been formed once, since it is the second call, call control is not performed and it ends. For the judgment of the SSID, it is checked whether there is an SSID registered in the SSID information storage unit 43 in association with the communication terminal 20 to be called among the transmitted SSID list. If the registered SSID is not in the received list, a call signal is not transmitted to the communication terminal 20 and the call control ends. In this way, if the password and the SSID satisfy the conditions, the call is permitted and a call signal is transmitted to the communication terminal 20 (S7).

[0030] Also, when the call control ends without satisfying the conditions, a message indicating that the call cannot be made is transmitted to and displayed on the mobile terminal 10. Also, if the password is incorrect, re - input may be prompted.

[0031] When a call signal is transmitted to the communication terminal 20, the server 40 transmits the second page of the web page to the mobile terminal 10 and causes the displayed web page to be updated to the page during the call (S8). FIG. 7 shows the display 12 of the mobile terminal 10 displaying the second page of the transmitted web page. As shown in FIG. 7, "Calling" is displayed and a guiding message is displayed.

[0032] When the communication terminal 20 receives the outgoing signal, it enters the called state and performs an outgoing operation (S9). This outgoing operation is performed in a different manner from other calls so that the app installed to function as an intercom can recognize that it is a call from a visitor. For example, a message such as "Call from the entrance" is displayed on the display 21. Through this display or the like, the resident can recognize that it is a call from a visitor to the home before responding.

[0033] After that, when the call button (not shown) of the communication terminal 20 is pressed (S10) and a response operation is performed, the server 40 permits the call (S11), a call path is formed between the mobile terminal 10 and the communication terminal 20, and a call becomes possible (S12) between the visitor and the resident. When the call path is formed, under the control of the app installed in the server 40, the camera 11 of the mobile terminal 10 and the camera 25 of the communication terminal 20 are activated, and the captured image video of the responding resident is displayed on the display 12 of the mobile terminal 10. The "During Call" display area E1 in FIG. 7 is a video display unit, and the face video of the resident received from the communication terminal 20 is displayed in this display area E1.

[0034] On the other hand, the face video of the visitor received from the mobile terminal 10 is also displayed on the display 21 of the communication terminal 20. In this way, the call is carried out while seeing the other party. After that, when the resident performs an end call operation on the communication terminal 20 or the visitor performs an end call operation on the mobile terminal 10, the server 40 cuts off the call path, and both devices return to the standby state.

[0035] In addition, when registering the communication terminal 20 in the server 40, if the name, address, etc. of the resident are registered together, the name information etc. of the responding resident can be displayed on the mobile terminal 10 at the time of call or at the time of the resident's response. Also, it is assumed that the access point 50 is installed so that the SSID registered in the server 40 can be received at the location where the image data 30 is posted.

[0036] In this way, the visitor can use the mobile terminal 10 carried by himself / herself to capture the image data posted at the entrance, so that the resident can be called. Therefore, even if there is no intercom device at the entrance, the resident can be called. Moreover, if the SSID of the access point 50 received by the mobile terminal 10 does not include the SSID registered in the server 40 in association with the communication terminal 20, the call is not permitted. That is, if the registered SSID is a signal transmitted from the destination or its vicinity, even if the web information is obtained without being near the destination household, the resident cannot be called. Therefore, since the calling area from malicious visitors such as suspicious persons is limited without using GPS, security can be maintained. Also, by using a one-time password, the calling of the resident by the operation of reading the image data is limited to only once, so that pranks can be prevented.

[0037] In addition, in the above embodiment, the call is restricted by using a one-time password in addition to the position information of the mobile terminal 10. However, it may be restricted only by the position information based on the SSID information without using the one-time password, which is effective for maintaining security.

[0038] Next, a second form of the intercom system 1 will be described. FIG. 8 shows a configuration diagram showing a second form of the intercom system 1. The difference from the above form is that instead of the SSID information of the access point 50, beacon information transmitted by the Bluetooth (registered trademark) transmitting terminal 60 is used. Since other components such as the mobile terminal 10, the communication terminal 20, the image data 30, and the server 40 are common, the description thereof is omitted. Note that the configuration of the server 40 is partially different. In this form, the position of the mobile terminal 10 is determined using the beacon ID of the Bluetooth (registered trademark) transmitting terminal 60. The beacon ID is transmitted at intervals of 0.1 seconds to several seconds and is transmitted with an intensity that can be received at a location several meters to 100 meters away, so it can be used for restricting the position of the mobile terminal 10.

[0039] FIG. 9 shows a block diagram of the server 40. As shown in FIG. 9, the server 40 includes a called party information storage unit 41, a call management unit 42, an image data generation unit 45, a server communication IF 46, a server CPU 47, and a beacon ID information storage unit 44. In the beacon ID information storage unit 44, the beacon ID information is associated with and registered for each communication terminal 20.

[0040] The intercom system 1 configured as described above operates as follows. FIG. 10 is an operation transition diagram from when the mobile terminal 10 reads the image data 30 until a call is made and further a call is made, and will be described with reference to FIG. 10. However, here, control is performed to limit the call only based on the condition of the beacon ID of the Bluetooth (registered trademark) transmitting terminal 60. This setting condition is stored and managed in the call management unit 42.

[0041] When a visitor who has come to the visited household H takes an image of the image data 30 posted at the entrance with the mobile terminal 10 carried by the visitor, the installed application reads the image data 30 and accesses the URL destination included in the read information. That is, it accesses the server 40 (S101).

[0042] The server 40 that has received the access from the mobile terminal 10 returns a web page for calling the communication terminal 20 associated with the image data 30 based on the information of the image data 30 transmitted from the mobile terminal 10 when the access is received (S102). Specifically, it returns the top page of the web page for calling the communication terminal 20. At that time, a command for requesting the beacon ID information of the Bluetooth (registered trademark) transmitting terminal 60 received by the mobile terminal 10, which is the condition set in the call management unit 42, is transmitted. The mobile terminal 10 that has received the web page from the server 40 displays the web page (S103).

[0043] FIG. 10 is an explanatory view showing the Web page received by the mobile terminal 10 in this way. As shown in FIG. 10, a call button B4 is displayed on the display 12 together with a caution. When the displayed call button B4 is pressed (touched), the SSID information received by the mobile terminal 10 together with a call signal is transmitted (S104) to the server 40. At this time, if a plurality of beacon IDs have been received, these plurality of beacon ID information (a list of beacon IDs) are transmitted. At the server 40 to which the beacon ID information has been transmitted (S105) together with the call signal, the server CPU 47 makes a determination as follows according to the conditions of the call management unit 42.

[0044] It is checked whether there is a beacon ID among the transmitted beacon IDs that is associated with the communication terminal 20 and registered in the beacon ID information storage unit 44. If so, the call is permitted and a call signal is transmitted to the communication terminal 20 (S106). If not, a call signal is not transmitted to the communication terminal 20 and the call control is terminated. In addition, when the call control is terminated without satisfying the conditions, a message indicating that the call cannot be made is transmitted to and displayed on the mobile terminal 10.

[0045] In this way, when a call signal is transmitted to the communication terminal 20, the server 40 transmits the second page of the Web page to the mobile terminal 10 and updates (S107) the displayed Web page to the page during the call as shown in FIG. 7 above. The communication terminal 20 that has received the call signal enters a called state and performs a call operation (S108). This call operation is performed in a different operation from other calls so that it can be recognized that it is a call from a visitor. For example, a message such as "Call from the entrance" is displayed on the display 21. By this display or the like, the resident can recognize that it is a call from a visitor to the home before responding.

[0046] After the call button (not shown) of the communication terminal 20 is pressed (S109) and a response operation is performed, the server 40 permits the call (S110), and a call path is formed (S111) between the mobile terminal 10 and the communication terminal 20, enabling a call between the visitor and the resident.

[0047] When the call path is formed, under the control of the application installed in the server 40, the camera 11 of the mobile terminal 10 and the camera 25 of the communication terminal 20 are activated, and the captured video image of the responding resident is displayed on the display 12 of the mobile terminal 10. The "Calling" display area E1 in FIG. 7 is a video display unit, and the face video image of the resident received from the communication terminal 20 is displayed in this display area E1. On the other hand, the face video image of the visitor received from the mobile terminal 10 is also displayed on the display 21 of the communication terminal 20. Thus, the call is carried out while seeing the other party. After that, when the resident performs an end call operation on the communication terminal 20, or when the visitor performs an end call operation on the mobile terminal 10, the server 40 cuts off the call path, and both devices return to the standby state.

[0048] In this way, the visitor can use the mobile terminal 10 carried by himself / herself to capture the image data 30 posted at the entrance, so that the resident can be called. Therefore, even if there is no intercom device at the entrance, the resident can be called. Moreover, if the beacon ID of the Bluetooth (registered trademark) transmitting terminal 60 received by the mobile terminal 10 does not contain the beacon ID registered in the server 40 in association with the communication terminal 20, the call is not permitted. That is, if the registered beacon ID is set to the beacon ID of the Bluetooth (registered trademark) transmitting terminal 60 transmitting from the destination or its vicinity, the callable area is limited. Therefore, if not near the destination household, even if web information is obtained, the resident cannot be called. Thus, without using GPS, calls from malicious visitors such as suspicious persons can be restricted, and security can be maintained.

[0049] Currently, in this embodiment, the call is restricted only by the condition of the beacon ID. However, a one-time password may be used in combination as in the above embodiment, and the security function can be further enhanced.

Explanation of Signs

[0050] 1 ··· Intercom system, 10 ··· Mobile terminal, 11 ··· Camera, 12 ··· Display, 13 ··· Operation unit, 14 ··· Memory, 15 ··· Communication unit, 16 ··· Wireless communication IF, 17 ··· Mobile terminal CPU, 20 ··· Communication terminal, 21 ··· Display, 22 ··· Operation unit, 23 ··· Memory, 24 ··· Communication unit, 25 ··· Camera, 26 ··· Communication IF, 27 ··· Communication terminal CPU, 30 ··· Image data, 40 ··· Server, 41 ··· Destination information storage unit, 42 ··· Call management unit, 43 ··· SSID information storage unit, 44 ··· Beacon ID information storage unit, 45 ··· Image data generation unit, 46 ··· Server communication IF, 47 ··· Server CPU, 50 ··· Wireless LAN access point, 60 ··· Bluetooth (registered trademark) transmitting terminal, N ··· Public communication network.

Claims

1. An intercom system having a mobile terminal carried by a visitor having a function of communicating with an external device via a public communication network, a communication terminal operated by a resident having a function of communicating with an external device via a public communication network, and a server for managing communication between the mobile terminal and the communication terminal, Image data for calling the communication terminal using the mobile terminal is posted at the entrance, The mobile terminal has a call function, a camera, and a function of reading the image data by imaging the image data with the camera, Further, the server has a call destination information storage unit for storing the association between the image data and a specific communication terminal, and an SSID information storage unit for associating a specific wireless LAN access point with each communication terminal and storing its SSID information, When the mobile terminal reads the image data, it accesses the server based on the information of the image data, obtains Web information for calling the communication terminal associated with the image data from the server, and can call the communication terminal from the Web information. On the other hand, The server transmits the Web information to the accessed mobile terminal, and at the same time, obtains the SSID information received by the mobile terminal from the mobile terminal, If there is no SSID stored in association with the communication terminal among the obtained information, the intercom system is characterized in that it does not permit the mobile terminal to call the communication terminal based on the Web information.

2. An intercom system having a mobile terminal carried by a visitor having a function of communicating with an external device via a public communication network, a communication terminal carried by a resident having a function of communicating with the mobile terminal via a public communication network, and a server for managing communication between the mobile terminal and the communication terminal, Image data for calling the communication terminal using the mobile terminal is posted at the entrance, The mobile terminal has a call function, a camera, and a function of reading the image data by imaging the image data with the camera, Further, the server includes a called party information storage unit that stores the association between the image data and the specific communication terminal, and a beacon information storage unit that associates a specific Bluetooth (registered trademark) transmitting terminal with each of the communication terminals and stores its beacon ID information. When the mobile terminal reads the image data, it accesses the server based on the information of the image data, obtains Web information for calling the communication terminal associated with the image data from the server, and while the communication terminal can be called from the Web information, The server transmits the Web information to the mobile terminal that has received the access, and at the same time, obtains the beacon ID information received by the mobile terminal from the mobile terminal. If the beacon ID stored in association with the communication terminal is not present in the obtained beacon ID information, the server does not permit the mobile terminal to call the communication terminal based on the Web information. This is a feature of the intercom system.

3. The Web information transmitted from the server to the mobile terminal includes password information that is valid only once. By using the password, the mobile terminal can call the communication terminal. Once a communication path is formed between the mobile terminal and the communication terminal, the password then becomes invalid and calling is not possible. This is the intercom system according to claim 1 or 2.

Images