Shared entrance device, communication system, intercom system, pairing method, and program

Abstract

To provide an intercom system with reduced construction costs.SOLUTION: A common entrance device is provided at a common entrance of a collective facility including a plurality of facilities, and includes a wireless communication unit and a control unit. The wireless communication unit wirelessly communicates with one or more pairing candidates among an entrance slave unit provided at the entrance of each of the plurality of facilities, a master unit provided inside each of the plurality of facilities, and a relay device provided inside the collective facility. The control unit has an individual pairing mode in which pairing with the pairing candidates is performed one by one, and a continuous pairing mode in which pairing is performed continuously with a plurality of devices.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a common entrance device, a communication system, an intercom system, a pairing method, and a program.

Background Art

[0002] In an apartment building or other collective facility equipped with an intercom system, a common entrance device is installed at the common entrance, and the common entrance device is communicably connected to a master unit installed in each facility (each dwelling unit). Also, an entrance sub-unit is installed at the entrance of each facility, and the entrance sub-unit is communicably connected to the master unit. Generally, the common entrance device and the master unit, and the entrance sub-unit and the master unit are connected by wire (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When replacing the common entrance device in an in-use collective facility, it is necessary to enter each facility and make the master unit and the common entrance device communicable. However, since it is necessary to enter and work in all facilities, the construction cost was high.

[0005] An object of the present disclosure is to provide an intercom system with reduced construction costs.

Means for Solving the Problems

[0006] One aspect of the present disclosure is a shared entrance device installed at the shared entrance of a complex facility including multiple facilities, comprising a wireless communication unit and a control unit, wherein the wireless communication unit communicates wirelessly with one or more pairing candidates from among entrance slaves installed at the entrances of each of the multiple facilities, master units installed inside each of the multiple facilities, and relay devices installed inside the complex facility, and the control unit has an individual pairing mode for performing pairing with pairing candidates one by one and a continuous pairing mode for performing pairing with multiple candidates in succession.

[0007] One aspect of the present disclosure is a communication system characterized by comprising the above-mentioned shared entrance device and an entrance substation.

[0008] One form of the intercom system disclosed herein is characterized by comprising the above-mentioned shared entrance device, an entrance sub-unit, and a master unit.

[0009] One form of the present disclosure is a pairing method for a shared entrance device installed at the shared entrance of a complex facility including multiple facilities, and a pairing candidate, wherein the pairing candidate is one or more of the following: entrance sub-units installed at the entrances of each of the multiple facilities, master units installed inside each of the multiple facilities, and relay devices installed inside the complex facility, and the shared entrance device continuously pairs with multiple of the pairing candidates.

[0010] One form of this disclosure is a program for implementing the above-described pairing method on a computer. [Effects of the Invention]

[0011] According to one aspect of this disclosure, a shared entrance device can reduce construction costs. [Brief explanation of the drawing]

[0012] [Figure 1] This is a schematic diagram of an intercom system, which is an example of an embodiment. [Figure 2]This is a front view of a shared entrance device, which is an example of an embodiment. [Figure 3] This is a block diagram showing the configuration of a shared entrance device, which is an example of an embodiment. [Figure 4] This figure shows the registration data for the door station in one example of the embodiment. [Figure 5] This is a flowchart showing the procedure for the individual pairing mode in one example of an embodiment. [Figure 6] This is a flowchart showing the procedure for continuous pairing mode in one example of an embodiment. [Figure 7] This flowchart shows the procedure for continuous pairing mode in another example of the embodiment. [Modes for carrying out the invention]

[0013] The embodiments of this disclosure will be described in detail below with reference to the drawings. The embodiments described below are merely examples, and this disclosure is not limited to these embodiments. Furthermore, it is intended from the outset that the multiple embodiments and modifications described below may be selectively combined.

[0014] The main component of the apparatus and system of this disclosure comprises a computer. The functions of the main component of the apparatus and system of this disclosure are realized by the computer executing a program. The computer comprises a processor as its main hardware component, which operates according to the program. The processor is of any type as long as it can realize the above functions by executing the program. The processor consists of one or more electronic circuits, including an integrated circuit (IC) or a large-scale integrated circuit (LSI). Multiple electronic circuits may be integrated on one chip or provided on multiple chips. Multiple chips may be aggregated in one device or provided on multiple devices. The program is stored in a non-temporary storage medium such as a ROM, optical disc, or hard disk drive that is readable by the computer. The program may be pre-stored on the storage medium or supplied to the storage medium via a wide-area communication network, including the Internet.

[0015] The following describes the communication system 3, shared entrance device 10, entrance sub-unit 20, and master unit 22 included in the intercom system 1, which is an example of an embodiment, with reference to Figures 1 to 5.

[0016] First, an overview of the intercom system 1 will be described with reference to Figure 1. Figure 1 is a schematic diagram showing the configuration of the intercom system 1 in this embodiment. The intercom system 1 is a system installed in a complex facility that includes multiple facilities, and in this embodiment, the complex facility is a multi-unit residential building such as an apartment building, dormitory, or company housing. However, the complex facility to which the intercom system 1 is applied is not limited to multi-unit residential buildings, and may also be a facility composed of multiple facilities (multiple companies, departments, divisions, etc.) such as an office, factory, research facility, medical facility, or accommodation facility.

[0017] The intercom system 1 comprises a common entrance device 10 installed at the common entrance 5 of the apartment building, entrance units 20 installed at the entrances of each facility (each dwelling unit) included in the apartment building, and a master unit 22 installed inside each dwelling unit.

[0018] The common entrance device 10 and the entrance sub - unit 20 are communicably connected to each other wirelessly, for example, and constitute a communication system 3. In this embodiment, the entrance sub - unit 20 installed in household A is directly wirelessly connected to the common entrance device 10, and the entrance sub - unit 20 installed in household B is indirectly wirelessly connected to the common entrance device 10 via the relay device 15. The relay device 15 is provided inside the collective facility and is communicably connected to the common entrance device 10 and the entrance sub - unit 20, so that it can assist the entrance sub - unit 20, which is in a situation where it is difficult to directly communicate with the common entrance device 10, to communicate with the common entrance device 10. The master unit 22 is connected to the entrance sub - unit 20 by wire, for example. The master unit 22 and the common entrance device 10 are communicably connected to each other via the entrance sub - unit 20. Since the master unit 22 is installed inside the household and it is difficult to directly communicate wirelessly with the common entrance device 10 compared to the entrance sub - unit 20, it is preferably connected to the common entrance device 10 via the entrance sub - unit 20 that can communicate with the common entrance device 10 as disclosed in the present application. Note that the common entrance device 10 and the master unit 22 may be communicably connected to each other wirelessly.

[0019] The common entrance device 10 is installed adjacent to the common entrance 5. The common entrance 5 is constituted by an automatic door, for example, and is normally in a locked state. The common entrance device 10 is used, for example, for a visitor to call each household. The visitor calls the visited household on the common entrance device 10 and asks the resident of that household to unlock the electric lock of the common entrance 5. Thereby, the visitor can enter the inside of the apartment building from the common entrance 5. Also, the common entrance device 10 is used, for example, for a person permitted to enter the apartment building to unlock the electric lock of the common entrance 5. The permitted person can unlock the electric lock of the common entrance 5 by performing a predetermined unlocking operation of the electric lock and enter the inside of the apartment building from the common entrance 5 of the apartment building. For example, the permitted person can unlock the electric lock of the common entrance 5 by entering a predetermined password into the common entrance device 10.

[0020] The master unit 22 includes, for example, a microphone, a speaker, a monitor, a call button, an unlocking button, etc. A resident who receives a call from a visitor via the shared entrance device 10 checks the image of the visitor on the monitor of the master unit 22. By operating the call button, the resident can communicate with the visitor through the microphone and the speaker. When the resident operates the unlocking button, an unlocking signal is sent from the master unit 22 to unlock the shared entrance ⑤, and the visitor can enter the inside of the apartment building. Also, a resident who receives a call from a visitor via the entrance sub-unit 20 checks the image of the visitor on the monitor of the master unit 22. By operating the call button, the resident can communicate with the visitor through the microphone and the speaker.

[0021] The entrance sub-unit 20 includes, for example, a call button 20a for calling the master unit 22. The entrance sub-unit 20 also includes a camera, a microphone, and a speaker. When the call button 20a is operated, the master unit 22 is called, and the visitor is photographed by the camera of the entrance sub-unit 20, and the image is displayed on the monitor of the master unit 22.

[0022] As will be described later, one or more pairing candidates among the entrance sub-unit 20 and the master unit 22 are configured to be paired with the shared entrance device 10. In the present embodiment, the entrance sub-unit 20 is configured to be paired with the shared entrance device 10 as will be described later. The paired entrance sub-unit 20 and the master unit 22 can communicate with each other with the shared entrance device 10.

[0023] A general intercom system includes a control device that comprehensively controls the intercom system. The control device is communicably connected to the shared entrance device, the entrance sub-unit, and the master unit, receives signals from each device to obtain various information, and outputs control signals to each device to control each device. The intercom system 1 of the present embodiment does not include a control device, and the shared entrance device 10 has the function of a control device.

[0024] Next, the shared entrance device 10 will be described with reference to Figures 2 to 4. Figure 2 is a front view of the shared entrance device 10 of this embodiment. As shown in Figure 2, the shared entrance device 10 includes a keypad 10a, a call button 10b, a reverse master key insertion section 10c, a camera 10d, a speaker 10e, a microphone 10f, a monitor 10g, and a sensor 10h. In addition to the above configuration, the shared entrance device 10 may also include, for example, an IC card reader. The IC card reader functions to transmit an unlocking signal when it detects a pre-registered card key.

[0025] The keypad 10a is a user interface that can be operated by residents or visitors. Authorized persons can, for example, unlock the electric lock on the common entrance 5 by entering a PIN using the keypad 10a. Visitors can also call the dwelling unit they are visiting by entering the dwelling unit number on the keypad 10a and pressing the call button 10b. Residents with keys can also unlock the electric lock on the common entrance 5 by inserting their key into the reverse master key insertion slot 10c.

[0026] Camera 10d captures images of residents and visitors operating the shared entrance device 10. When a visitor calls the dwelling unit they are visiting using the shared entrance device 10, the shared entrance device 10 captures images of the visitor with camera 10d and transmits the video to the master unit 22 from which the call originated.

[0027] The speaker 10e and microphone 10f are used for visitors to communicate with residents via the master unit 22 installed in each dwelling unit. The speaker 10e outputs a ringtone and, if the resident answers, their voice. The visitor's voice is picked up by the microphone 10f and transmitted to the master unit 22, allowing them to converse with the resident they are visiting. The monitor 10g displays, for example, video footage captured by the camera 10d.

[0028] Sensor 10h detects the presence of a person in front of the shared entrance device 10. The detection of a person by sensor 10h causes the shared entrance device 10 to transition from sleep mode to an operational state. Upon the start of the operational state, monitor 10g lights up, prompting the person in front of the shared entrance device 10 to operate it. If communication between the resident and the visitor ends, or if no operation is performed on the shared entrance device 10 after a predetermined time, the shared entrance device 10 returns to sleep mode.

[0029] Figure 3 is a block diagram showing the configuration of a shared entrance device 10, which is an example of an embodiment. The shared entrance device 10 includes, for example, a processor 30 that performs calculation processing to control the shared entrance device 10, and a memory 32 in which control programs and the like are stored. The shared entrance device 10 is composed of a computer including the processor 30. The memory 32 is composed of, for example, RAM, ROM, hard disk, etc., and is built into the computer including the processor 30. The shared entrance device 10 may be composed of one computer or multiple computers.

[0030] The processor 30 reads and executes the control program installed in the memory 32, thereby realizing the functions of the control unit 42, which will be described later. Specifically, the control program installed in the memory 32 includes a program for the computer to implement the method of pairing the shared entrance device 10 with the pairing candidate 25.

[0031] The shared entrance device 10 includes a wireless communication unit 40 that communicates wirelessly with the pairing candidate 25, and a control unit 42 that controls the pairing with the pairing candidate 25. The shared entrance device 10 may also include an operation unit 44. The operation unit 44 is configured to receive operations on the shared entrance device 10. The operation unit 44 is, for example, a numeric keypad 10a.

[0032] Pairing enables communication between the shared entrance device 10 and the pairing candidate 25. The pairing candidate 25 is one or more of the following: the entrance sub-unit 20, the master unit 22, and the relay device 15. Pairing may also be performed based on a pairing signal transmitted from the pairing candidate 25 while the pairing mode is running. The pairing signal is transmitted from the pairing candidate 25, for example, by operating the control panel of the pairing candidate 25. The pairing signal may also be transmitted from the entrance sub-unit 20 by pressing the call button 20a of the entrance sub-unit 20 for a predetermined time or longer.

[0033] From the viewpoint of improving the stability of communication with the shared entrance device 10, it is preferable that the master unit 22 and the entrance sub-unit 20 are connected to each other via a wire so that they can communicate with each other, and that pairing is performed between the shared entrance device 10 and the entrance sub-unit 20. That is, it is preferable that the entrance sub-unit 20 becomes the pairing candidate 25, and the master unit 22 communicates with the shared entrance device 10 via the entrance sub-unit 20. For example, when replacing an existing intercom system with the intercom system 1 according to this disclosure, construction costs can be reduced. Since communication between the master unit 22 and the shared entrance device 10 becomes possible by replacing the existing shared entrance device 10 and the entrance sub-unit 20, it is not necessary to enter each dwelling unit and make the master unit 22 and the shared entrance device 10 able to communicate.

[0034] Through pairing, for example, registration data for pairing candidate 25 is stored in the shared entrance device 10. Figure 4 shows the registration data for an entrance sub-unit 20 in an example of an embodiment. Each management number, arranged in ascending order from 1, is assigned a room number of a dwelling unit. Each entrance sub-unit 20, which is a pairing candidate 25, has a unique registration number (ID). For example, the ID of the entrance sub-unit 20 installed at the entrance of dwelling unit 101 is "AAAAAAAAA". When a call operation for dwelling unit 101 is performed on the shared entrance device 10, the shared entrance device 10 communicates with the entrance sub-unit 20 with the ID "AAAAAAAAA" and calls the master unit 22 of that dwelling unit. Note that Figure 3 is an example, and the format of the registration data for the entrance sub-unit 20 is not particularly limited. Also, pairing candidate 25 may be a master unit 22 or a relay device 15. The registration data for pairing candidate 25 is stored, for example, in the memory 32 of the shared entrance device 10.

[0035] The wireless communication unit 40 shown in Figure 3 has the function of communicating wirelessly with, for example, the door station 20. Wireless communication refers to communication using radio waves without using wires. The frequency band used is not particularly limited as long as it can be used in an apartment building. The wireless communication unit 40 may communicate directly with the door station 20, or it may communicate via the relay device 15. The relay device 15 may be a commercially available device. The wireless communication unit 40 is configured to communicate with the master unit 22 via, for example, the door station 20.

[0036] The control unit 42 has the function of controlling the operation of the wireless communication unit 40. The control unit 42 is configured to call a predetermined master unit 22 when a call operation is performed on the shared entrance device 10, and to output an unlock signal for the shared entrance 5 based on the operation of the master unit 22. The control unit 42 is also configured to call the master unit 22 when the call button 20a of the entrance sub-unit 20 is operated.

[0037] The control unit 42 is configured to perform control related to the unlocking operation of the common entrance 5 using the common entrance device 10. Specifically, the control unit 42 acquires input information input to the common entrance device 10 and outputs an unlocking signal for the common entrance 5 based on that input information.

[0038] The control unit 42 has a pairing mode, which is an operating mode for pairing communication between the wireless communication unit 40 and the pairing candidate 25. In pairing mode, the control unit 42 pairs with the pairing candidate 25, which is the source of the pairing signal. That is, in pairing mode, the control unit 42 is configured to establish communication between the wireless communication unit 40 and the pairing candidate 25. For example, a paired door station 20 can be called from the wireless communication unit 40. Here, being able to call the door station 20 includes being able to indirectly call the master unit 22 connected to the door station 20.

[0039] The control unit 42 has an individual pairing mode for pairing with pairing candidates 25 one at a time, and a continuous pairing mode for pairing with multiple candidates in succession. In other words, the control unit 42 has two pairing modes: an individual pairing mode and a continuous pairing mode. The control unit 42 may switch to a pairing mode based on an operation on the operation unit 44. An operation to switch to a pairing mode is, for example, entering a predetermined PIN using the numeric keypad 10a. In this case, the individual pairing mode and the continuous pairing mode each have different PINs.

[0040] The individual pairing mode ends, for example, when pairing with one of the pairing candidates 25 is completed. The individual pairing mode is used, for example, when newly introducing an intercom system to a shared facility. By using the individual pairing mode, the shared entrance device 10 can be operated to assign a room number to one of the pairing candidates 25 that has sent a pairing signal. By performing this operation for each of the pairing candidates 25 and further connecting the master unit 22 to the entrance sub-unit 20, the intercom system 1 can be constructed relatively easily.

[0041] In continuous pairing mode, for example, once pairing with one of the pairing candidates 25 is complete, the device enters a waiting state to pair with another of the pairing candidates 25. Continuous pairing mode may also be terminated based on an operation on the control unit 44. Alternatively, after receiving pairing signals from multiple pairing candidates 25, the continuous pairing mode may sequentially perform pairing with the pairing candidates 25 that sent the pairing signals.

[0042] The continuous pairing mode is used, for example, when replacing an existing intercom system with the intercom system 1 according to this disclosure. By using the continuous pairing mode, after setting the shared entrance device 10 to pairing mode, pairing can be performed by sequentially transmitting pairing signals from each of the pairing candidates 25 installed at the entrance of the facility. It is preferable to assign a room number to each pairing candidate 25 before pairing. For example, when pairing an entrance sub-unit 20 as a pairing candidate 25 with the shared entrance device 10, the room number stored in the master unit 22 can be assigned to the entrance sub-unit 20 by connecting the entrance sub-unit 20 and the master unit 22 before pairing.

[0043] The following describes an example of the pairing procedure between the shared entrance device 10 and the pairing candidate 25, referring to the flowcharts in Figures 5 to 7.

[0044] Figure 5 is a flowchart illustrating the procedure for individual pairing mode in one embodiment. In this pairing procedure, first, the shared entrance device 10 enters pairing mode by performing a predetermined operation on the shared entrance device 10 (S10). Next, one pairing candidate 25 transmits a pairing signal (S11), and the shared entrance device 10 receives this pairing signal and registers the ID of the pairing candidate 25 that transmitted the pairing signal, thereby performing pairing (S12). This flow ends after executing S12, and this flow is repeated when pairing with another pairing candidate 25.

[0045] Figure 6 is a flowchart illustrating the procedure for continuous pairing mode in one embodiment. In this pairing procedure, first, the shared entrance device 10 enters pairing mode by performing a predetermined operation on the shared entrance device 10 (S20). Next, one pairing candidate 25 transmits a pairing signal (S21), and the shared entrance device 10 receives this pairing signal and registers the ID of the pairing candidate 25 that transmitted the pairing signal, thereby performing pairing (S22). After the process in S22, the shared entrance device 10 enters a pairing waiting state.

[0046] If pairing is to be performed with another pairing candidate 25 (YES in S23), the process returns to S21 and the same process as above is performed again. If pairing is not to be performed with another pairing candidate 25 (NO in S23), the flow ends by performing a predetermined operation on the shared entrance device 10 (S24).

[0047] Figure 7 is a flowchart illustrating the procedure for continuous pairing mode in another example of the embodiment. In this pairing procedure, first, the shared entrance device 10 enters pairing mode by performing a predetermined operation on the shared entrance device 10 (S30). Next, multiple pairing candidates 25 transmit pairing signals (S31), and the shared entrance device 10 receives all pairing signals and registers the ID of each pairing candidate 25 that transmitted a pairing signal, thereby performing pairing (S32). This flow terminates after executing S32.

[0048] As described above, the shared entrance device, communication system, intercom system, pairing method, and program of this disclosure enable efficient pairing of the shared entrance device and the entrance sub-unit, allowing for the construction of an intercom system in a simple manner, thereby reducing construction costs.

[0049] This disclosure is further illustrated by the following embodiments. Configuration 1: A shared entrance device installed at the common entrance of a complex facility that includes multiple facilities, It comprises a wireless communication unit and a control unit, The wireless communication unit communicates wirelessly with one or more pairing candidates from among the entrance units installed at the entrances of each of the multiple facilities, the master units installed inside each of the multiple facilities, and the relay devices installed inside the collective facility. The control unit has an individual pairing mode for pairing with the pairing candidates one by one, and a continuous pairing mode for pairing with multiple candidates in succession, in a shared entrance device. Configuration 2: The shared entrance device according to Configuration 1, wherein the pairing is performed based on a pairing signal transmitted from the pairing candidate by operating the pairing candidate's operation unit during the execution of the individual pairing mode or the continuous pairing mode. Configuration 3: The shared entrance device according to configuration 1 or 2, wherein the individual pairing mode is terminated when pairing with one of the pairing candidates is completed. Configuration 4: The continuous pairing mode is a shared entrance device according to any one of configurations 1 to 3, wherein once pairing with one of the pairing candidates is completed, the device enters a state of waiting to pair with another of the pairing candidates. Configuration 5: The shared entrance device according to configuration 4, wherein the continuous pairing mode is terminated based on an operation on the control unit of the shared entrance device. Configuration 6: The continuous pairing mode is a shared entrance device according to configuration 2, which, after receiving the pairing signals from multiple pairing candidates, sequentially performs the pairing on the pairing candidates that transmitted the pairing signals. Composition 7: The main unit and the door station are connected via a wire, enabling them to communicate with each other. A shared entrance device according to any one of configurations 1 to 6, wherein the pairing is performed between the shared entrance device and the entrance sub-unit. Composition 8: A communication system comprising a shared entrance device described in any one of configurations 1 to 7, and the entrance substation. Composition 9: An intercom system comprising a shared entrance device described in any one of configurations 1 to 7, the entrance sub-unit, and the master unit. Configuration 10: A method for pairing a shared entrance device installed at the shared entrance of a complex facility containing multiple facilities with a pairing candidate, The pairing candidates are one or more of the following: entrance units installed at the entrance of each of the multiple facilities, master units installed inside each of the multiple facilities, and relay devices installed inside the collective facility. A pairing method comprising the aforementioned shared entrance device continuously pairing with multiple units from among the pairing candidates. Composition 11: The pairing method according to configuration 10, wherein the pairing is performed based on a pairing signal transmitted from the pairing candidate by operating the operation unit of the pairing candidate. Composition 12: The pairing method according to configuration 10 or 11, wherein when the shared entrance device completes the pairing with one of the pairing candidates, it enters a state of waiting to pair with another of the pairing candidates. Composition 13: The pairing method according to configuration 11, wherein the shared entrance device receives the pairing signals from multiple of the pairing candidates, and then sequentially performs the pairing on the pairing candidates that transmitted the pairing signals. Composition 14: A program for implementing the pairing method described in one of configurations 10-13 on a computer. [Explanation of Symbols]

[0050] 1 Intercom system, 3 Communication system, 5 Shared entrance, 10 Shared entrance device, 10a Keypad, 10b Call button, 10c Reverse master key insertion slot, 10d Camera, 10e Speaker, 10f Microphone, 10g Monitor, 10h Sensor, 15 Repeater device, 20 Entrance sub-unit, 20a Call button, 22 Master unit, 25 Pairing candidates, 30 Processor, 32 Memory, 40 Wireless communication unit, 42 Control unit, 44 Operation unit

Claims

1. A shared entrance device installed at the common entrance of a complex facility that includes multiple facilities, It comprises a wireless communication unit and a control unit, The wireless communication unit communicates wirelessly with one or more pairing candidates from among the entrance units installed at the entrances of each of the multiple facilities, the master units installed inside each of the multiple facilities, and the relay devices installed inside the collective facility. The control unit has an individual pairing mode for pairing with the pairing candidates one by one, and a continuous pairing mode for pairing with multiple candidates in succession, in a shared entrance device.

2. The shared entrance device according to claim 1, wherein the pairing is performed based on a pairing signal transmitted from the pairing candidate by an operation on the pairing candidate's operation unit during the execution of the individual pairing mode or the continuous pairing mode.

3. The shared entrance device according to claim 1, wherein the individual pairing mode is terminated when pairing with one of the pairing candidates is completed.

4. The shared entrance device according to claim 1, wherein the continuous pairing mode, once pairing with one of the pairing candidates is completed, enters a state of waiting to pair with another of the pairing candidates.

5. The shared entrance device according to claim 4, wherein the continuous pairing mode is terminated based on an operation on the operating section of the shared entrance device.

6. The continuous pairing mode is a shared entrance device according to claim 2, wherein after receiving the pairing signals from multiple of the pairing candidates, the pairing is performed sequentially on the pairing candidates that transmitted the pairing signals.

7. The main unit and the door station are connected via a wire, enabling them to communicate with each other. The shared entrance device according to claim 1, wherein the pairing is performed between the shared entrance device and the entrance sub-unit.

8. A communication system comprising a shared entrance device according to any one of claims 1 to 7 and the entrance substation.

9. An intercom system comprising a shared entrance device according to any one of claims 1 to 7, the entrance sub-unit, and the master unit.

10. A method for pairing a shared entrance device installed at the shared entrance of a complex facility containing multiple facilities with a pairing candidate, The pairing candidates are one or more of the following: entrance units installed at the entrance of each of the multiple facilities, master units installed inside each of the multiple facilities, and relay devices installed inside the collective facility. A pairing method in which the aforementioned shared entrance device continuously pairs with multiple units from among the pairing candidates.

11. The pairing method according to claim 10, wherein the pairing is performed based on a pairing signal transmitted from the pairing candidate by operating the operating unit of the pairing candidate.

12. The pairing method according to claim 10, wherein when the shared entrance device completes the pairing with one of the pairing candidates, it enters a state of waiting to pair with another of the pairing candidates.

13. The pairing method according to claim 11, wherein the shared entrance device receives the pairing signals from multiple of the pairing candidates, and then sequentially performs the pairing on the pairing candidates that transmitted the pairing signals.

14. A program for implementing the pairing method described in any one of claims 10 to 13 on a computer.

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