JP2008136139A - Intercom system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intercom system which enables telephone communication between intercom master units via a network line. <P>SOLUTION: An extension telephone device is provided with a door intercom slave unit 2, and the intercom master unit comprising a master unit 3 and a network adapter 4, and is connected to a server device 5 via the network line NT. When a predetermined operation is executed by either the door intercom slave unit 2 or the master unit 3, a CPU 30 of the master unit 3 sends a transmission signal including its own address, a destination address and a command signal corresponding to the predetermined operation from the network adapter 4. When the network adapter 4 receives the transmission signal from the server device 5, the CPU 30 performs an operation for establishing a call connection with the source master device 3 in accordance with the command signal included in the transmission signal. When a control unit 51 of the server device 5 receives the transmission signal from any master unit 3, the control unit 51 sends the source address and the command signal to the master unit 3 of which address corresponds to the destination address in the transmission signal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an intercom system.

In recent years, there has been an increase in two-family homes where parent and child households can live side by side. In such a two-family house, each household has an interphone system consisting of a door phone slave unit and an interphone master unit. However, there is a demand for making calls between households using the interphone system. By connecting the interphone master units of each household via a dedicated communication line, it was possible to make a call between the interphone master units of each household (see, for example, Patent Document 1).
JP 11-68980 A

  In the intercom system described above, interphone master units installed in each household of a two-family house are connected via a dedicated communication line, but in the case of two households living in the vicinity (separate sites), dedicated communication Since it was not possible to lay a line, there was a problem that telephone calls could not be made between such households using the intercom system.

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to make a call via a network line between interphone master units of an extension call device installed in a household living in a remote place. It is to provide an intercom system that can be used.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided a door phone slave installed at a front door and an interphone master set installed indoors via a communication line. A plurality of extension call devices that perform extension calls with each other, and a server device to which a plurality of interphone master units are connected via a network line, and each interphone master unit via a network line. When a predetermined operation is performed on at least one of the doorphone slave unit or the interphone master unit, a transmission signal including a command signal corresponding to the operation is transmitted from the network communication unit. When the network communication means receives the transmission signal transmitted from the server device, the network communication means includes the transmission signal included in the transmission signal. And a control means for performing an operation for forming a communication line with the transmission source interphone base unit in response to the transmission signal, and the server device receives a transmission signal transmitted from any interphone base unit Then, a communication control means for transmitting a command signal included in the received transmission signal to the corresponding interphone master unit is provided.

  According to a second aspect of the present invention, in the first aspect of the invention, the interphone main unit is set to the normal mode for responding to a call from the door phone sub unit or the call from the door phone sub unit as the operation mode of the control means. A mode selection means is provided for selecting one of the answering modes to be transferred to the extension telephone apparatus. When a call operation is performed by the intercom handset as a predetermined operation in the answering mode, the control means calls from the interphone master unit of the transfer destination. In the extension call device of the transfer destination that has transmitted the transmission signal including the command signal for ringing the sound from the network communication means and received the transmission signal including the command signal for ringing the ringing tone from the server device, the interphone master unit is controlled. When the means rings the ringing tone and performs a response operation to the call, the server device and the transfer source interphone parent Via and forming a communication line between the calling intercom slave unit.

  According to a third aspect of the present invention, in the first aspect of the present invention, the predetermined operation includes a base unit call operation for calling an interphone base unit of another extension call device from the interphone base unit. When a machine call operation is performed, a transmission signal including a command signal for ringing a ringing tone is transmitted from the network intercommunication unit from the intercom master unit of the call destination, and a transmission signal including a command signal for ringing the ringing tone from the server device is transmitted. In the received extension telephone apparatus, the control unit of the interphone base unit sounds a ringing tone and, when a response operation is performed for the call, forms a communication line with the interphone base unit that is the call source via the server apparatus. It is characterized by doing.

  The invention of claim 4 is the invention of any one of claims 1 to 3, wherein individual addresses are assigned to the plurality of interphone master units, and each interphone master unit is assigned to the interphone master unit of the communication partner. A storage means for storing the assigned address is provided, and when a predetermined operation is performed on at least one of the doorphone slave unit and the interphone master unit, the control unit of the interphone master unit stores the address and the storage unit in its own address. When the transmission signal including the stored address and the command signal corresponding to the operation is transmitted from the network communication means, and the network communication means receives the transmission signal transmitted from the server device, it corresponds to the command signal included in the transmission signal. And an operation for forming a communication line with the interphone master unit of the transmission source, and the server device When receiving a transmission signal from any interphone master unit, the communication control means transmits the transmission source address and the command signal included in the transmission signal to the interphone master unit corresponding to the address of the communication partner included in the transmission signal. It is characterized by that.

  According to the first aspect of the present invention, when a predetermined operation is performed on at least one of the doorphone slave unit and the interphone master unit of the extension telephone connected to the server device via the network line, the control of the interphone master unit is performed. The means transmits a transmission signal including a command signal corresponding to the operation from the network communication means, and the server apparatus that has received the transmission signal transmits the command signal included in the transmission signal to the corresponding interphone master unit, The control unit of the corresponding interphone master unit operates to form a communication line with the source interphone master unit in response to the command signal included in the received transmission signal. When a telephone line can be formed between extension telephones without making a dedicated communication line between the extension telephones There is a cormorant effect.

  According to the second aspect of the present invention, the control means in which the operation mode is switched to the absence mode using the mode selection means includes the command signal for sounding the ringing tone when the call signal from the door phone slave unit is input. The server device that has transmitted the transmission signal from the network communication means and received the transmission signal transmits the command signal included in the transmission signal to the corresponding interphone base unit. In the corresponding interphone base unit, the control unit generates the ringing tone. When a call is answered and a response operation is performed for a call, a call line is formed between the server device and the caller intercom main unit via the interphone master unit of the transfer source. When the dwelling unit in which is installed is absent, there is an effect that the extension call device of another dwelling unit registered in advance can handle the visitor instead.

  According to the invention of claim 3, the control unit of any interphone master unit causes the network communication unit to transmit a transmission signal including a command signal corresponding to the master unit call operation, and the server device that has received the transmission signal When the command signal included in the transmission signal is transmitted to the corresponding interphone master unit, the control means in the call destination interphone master unit sounds a ringing tone, and when a response operation is performed for the call, the call source is transmitted via the server device. A telephone line is formed with other interphone master units, so calls can be made using the intercom master unit of the extension telephone device without using a telephone between different dwelling units, improving convenience. In addition, the communication cost can be reduced.

  According to the invention of claim 4, since each interphone master unit is provided with storage means for storing the address assigned to the corresponding interphone master unit, the interphone master unit corresponding to the address stored in the storage means A telephone line can be formed between the two to make a telephone call. Further, by changing the storage contents of the storage means in each interphone master unit, the interphone master unit of the call partner can be easily changed.

  Embodiments of the present invention will be described below with reference to FIGS.

  FIG. 2 is a schematic configuration diagram of the intercom system according to the present embodiment. The extension telephone devices 1a and 1b installed in the dwelling units A and B, respectively, and the network adapters 4 and 4 of the extension telephone devices 1a and 1b are connected to the network line NT. And a server device 5 connected to each other as a main component. In this embodiment, the case where the extension telephone devices 1a and 1b are installed in the two dwelling units A and B will be described as an example. However, the number of the extension telephone devices 1a... Is limited to two. However, it goes without saying that there may be three or more extension call devices 1a.

  Each extension communication device 1a, 1b includes a doorphone slave unit 2 installed at the entrance of each of the dwelling units A, B, and a base unit 3 installed indoors with the doorphone slave unit 2 connected via a communication line L1. A network adapter 4 (network communication means) having a function of performing communication via the network line NT, and the base unit 3 and the net adapter 4 constitute the Internet base unit of the present invention. Since the individual extension call devices 1a and 1b have the same configuration, the extension call device 1a will be described below with reference to FIG. 1 and FIG.

  The intercom unit 2 includes at least a call button 21 that is pressed by a visitor to perform a call operation, a transmission / reception unit 22 including a speaker and a microphone, and a camera 23 that captures a video of the visitor. The intercom unit 2 is connected to the base unit 3 via the communication line L1 so that an extension call can be made with the base unit 3. In the intercom unit 2, the video signal of the camera 23 frequency-modulated with the audio signal (baseband signal) is multiplexed and transmitted to the base unit 3 via the communication line L1.

  As shown in FIG. 1A, the base unit 3 includes a CPU 30 (control means) that performs overall signal processing and control of the base unit 3 with a microcomputer as a main component, and a doorphone slave unit 2 through a communication line L1. A doorphone sub-unit call detection circuit 31 that detects the incoming call signal and outputs the detection signal to the CPU 30; a video display monitor 32 for monitoring the video captured by the camera 23 of the doorphone sub-unit 2; The video signal sent from the intercom unit 2 by frequency multiplexing is demodulated into an analog video signal and output to the monitor 32, and the analog audio signal and video signal are converted into digital signals to the network adapter 4. Audio processing that performs hands-free call control so that a call between the video modulation / demodulation circuit 33 to be output and the intercom unit 2 or a call to another base unit 3 is possible. A path 34, a microphone MC and a speaker SP constituting a transmission / reception unit, an extension address storage unit (storage unit) 35 for storing an address assigned to itself and an address of a parent device 3 of a transmission partner, and a network adapter 4 And a control I / F command transmission / reception circuit 36 for transmitting / receiving a command signal multiplexed with an audio signal. Note that the contents stored in the extension address storage unit 35 can be changed using an appropriate setting means (not shown), and the address of the transfer destination master unit 3 in the absence mode, which will be described later, The address of the callee base unit 3 can be easily rewritten.

  Further, as shown in FIG. 1B, the net adapter 4 is connected between the CPU 40 that performs overall signal processing and control of the net adapter 4 with a microcomputer as a main component, and the server apparatus 5 via the network line NT. The network I / F circuit 41 that performs network communication in the network, the control I / F command transmission / reception circuit 42 that exchanges the command signal multiplexed with the audio signal between the parent device 3, and the audio signal received from the parent device 3. The video / video signal is converted into a protocol and output to the network I / F circuit 41, and the voice / video signal input from the network I / F circuit 41 is converted into a protocol / voice signal to be output to the base unit 3. And a processing circuit 43.

  On the other hand, the server device 5 stores a control unit 51 (communication control means) that controls communication between the network adapters 4 of the extension telephones 1a and 1b and addresses assigned to the individual extension telephones 1a and 1b. And a memory 52. Table 1 below shows information stored in the memory 52, which is used for network communication with addresses (dwelling unit addresses) AD (= 1, 2,...) Assigned to the individual extension call devices 1a. The IP addresses of the extension call devices 1a... Are registered in the memory 52 in association with each other.

  Next, the operation of this system will be described with reference to the flowcharts of FIGS. First, the operation in the case of performing an extension call between the extension call devices 1a and 1b installed in the dwelling units A and B will be described with reference to FIG.

  When the dweller pushes the extension call button 38b (see FIG. 2) of the base unit 3 installed in the dwelling unit A (S1), the CPU 30 as the control means responds to this operation (base unit call operation) by the extension call button. Based on the extension call request signal input from 38b, the own address and the address of the transmission partner (extension call destination) stored in the extension address storage unit 35 (in this case, the base unit 3 installed in the dwelling unit B) Address) and a control signal including a command signal corresponding to the extension call request is output from the control I / F command transmission / reception circuit 36 to the network adapter 4. At this time, in the network adapter 4, the control I / F command transmission / reception circuit 36 controls the network I / F circuit 41 based on the control signal input from the parent device 3, and sends the address of the caller parent device 3 and the transmission source. A transmission signal including the address of the master unit 3 of the conversation partner and a command signal corresponding to the extension call request is output to the server device 5 through the network line NT (S2). When the server device 5 receives this transmission signal, the server device 5 sends the address of the caller base unit 3 to the extension communication device 1b of the transmission partner based on the address of the transmission partner included in the transmission signal. A transmission signal including a command signal corresponding to the extension call request is transmitted (S3).

  When the network adapter 4 receives a transmission signal transmitted from the server device 5 in the extension telephone device 1b of the transmission partner, this transmission signal is sent to the parent device 3, and the CPU 30 of the parent device 3 makes an extension call request. Based on the corresponding command signal, an extension ringing tone is generated from the speaker SP (S4). Here, it is preferable that the extension ringing tone is different from the ringing tone from the door phone slave unit 2, and it is possible to discriminate whether the calling by the door phone subunit 2 or the calling from another extension call device is based on the difference in sound. it can.

  In the base unit 3 of the extension call device 1b, after ringing the extension call sound, the CPU 30 monitors whether or not the call button 38a (see FIG. 2) is operated (S5). When the call button 38a is pressed to respond to the extension call, the CPU 30 sends a signal indicating that there is a response to the server device 5 through the network adapter 4 (S7). When the server device 5 receives this transmission signal, the server device 5 sends the audio signal from the parent device 3 to the parent device 3 of the extension call device 1b via the net adapter 4 to the parent device 3 of the extension call device 1a that is the call source. A command signal for receiving a voice signal from the master unit 3 of the extension call device 1b is transmitted. The server device 5 also causes the master unit 3 of the extension call device 1b to receive a voice signal from the extension call device 1a via the net adapter 4, and sends the voice signal from the master unit 3 to the master unit of the extension call device 1a. 3 transmits a command signal to be transmitted to 3. At this time, a telephone line is formed between the master unit 3 of the extension telephone device 1a and the master unit 3 of the extension telephone device 1b via the net adapter 4, and the master unit 3 of the dwelling unit A and the master unit 3 of the dwelling unit B Extension calls via the server device 5 are started (S8). Thereafter, it is determined whether or not a predetermined call time elapses from the start of the extension call or an operation for terminating the call is performed in the base unit 3 of the extension call device 1b of the call destination (S9), and it is determined that the call is ended. Then, a signal indicating the end of the call is sent to the server device 5 through the network adapter 4, the call line between the extension call device 1a and the base unit 3 is closed, and the extension call is ended.

  In the base unit 3 of the extension call device 1b, if there is no response operation by the resident (that is, the operation of the call button 38a) as a result of the determination in S5, the CPU 30 outputs a predetermined call waiting time after outputting the extension call tone. (S6), if the call waiting time has elapsed (that is, if the call button 38a is not operated after the ringing sound is output until the call waiting time elapses). The processing is terminated, and no extension call is made with the extension call device 1a of the calling source.

  Next, a visitor call transfer operation for transferring a call from the doorphone slave unit 2 to the master unit of another extension call device will be described with reference to the flowchart of FIG. Each parent device 3 is provided with a mode selection SW 37 (mode selection means) (see FIG. 1A and FIG. 2), and the operation mode of the CPU 30 depends on the switching operation of the mode selection SW 37. It is possible to switch to either a normal mode in response to a call from the telephone 2 or an answering mode in which a call from the intercom 2 is transferred to another extension telephone.

  Here, when a visitor presses the call button 21 of the door phone slave unit 2 installed in the dwelling unit A (S11), the door phone slave unit call detection circuit 31 of the base unit 3 detects the call operation of the door phone slave unit 2. The call signal is output to the CPU 30. The CPU 30 of the base unit 3 confirms the presence / absence setting, that is, the setting of the mode selection SW 37 (S12). If it is absent (absence mode), the transmission address stored in its own address and extension address storage unit 35 A control signal including the address of the other party (transfer destination) (in this case, the address of the base unit 3 installed in the dwelling unit B) and a command signal corresponding to the visitor call transfer is sent from the control I / F command transmission / reception circuit 36 to the network adapter 4. To output. At this time, in the network adapter 4, the control I / F command transmission / reception circuit 36 controls the network I / F circuit 41 based on the control signal input from the parent device 3, and the address and transfer of the parent device 3 of the transfer source. A transmission signal including the address of the previous base unit 3 and a command signal corresponding to the visitor call transfer is output to the server device 5 through the network line NT (S13). When the server device 5 receives this transmission signal, the server device 5 sends the address of the parent machine 3 of the transfer source and the customer to the extension telephone device 1b of the transfer destination based on the address of the transfer destination included in the transmission signal. A transmission signal including a command signal corresponding to the call transfer is transmitted (S14).

  Then, when the network adapter 4 receives the transmission signal transmitted from the server device 5 in the extension telephone device 1b of the transfer destination, this transmission signal is sent to the parent device 3, and the CPU 30 of the parent device 3 supports the visitor call transfer. A ringing tone is generated from the speaker SP based on the command signal (S15). Here, the ringing tone when the call of the doorphone sub-unit 2 is transferred from the other extension call device 1a (or 1b) is different from the ringing tone from the door-phone sub-unit 2 directly connected to the base unit 3. It is preferable that the call from the doorphone sub unit 2 of the same dwelling unit or the call from the doorphone sub unit 2 of another dwelling unit can be easily discriminated by the difference in sound.

  In base unit 3 of extension call device 1b, after ringing the ringing tone, CPU 30 monitors whether call button 38a is operated or not (S16), and the dweller of dwelling unit B responds to the doorphone call. When the call button 38a is pressed for this purpose, the CPU 30 sends a transmission signal including its own address, a transfer source address, and a signal indicating that there is a response to the server device 5 through the network adapter 4 (S17). When the server device 5 receives this transmission signal, the server device 5 outputs a signal for causing the master unit 3 of the extension telephone device 1a to form a communication line with the intercom unit 2 via the net adapter 4, A communication line between the base unit 3 and the door phone slave unit 2 is opened. Thereafter, the server device 5 causes the base unit 3 of the extension call device 1a to transmit the audio signal and the video signal from the door phone slave unit 2 to the base unit 3 of the extension call device 1b via the net adapter 4, and the extension call device. A command signal for receiving a voice signal from the master unit 3 of 1b is transmitted. In addition, the server device 5 causes the master unit 3 of the extension call device 1b to receive the audio signal and the video signal from the extension call device 1a via the net adapter 4, and sends the voice signal from the master device 3 to the extension call device 1a. The command signal for transmitting to the door phone slave unit 2 is transmitted. At this time, audio signals and video signals are transmitted / received between the doorphone slave unit 2 of the extension call device 1a and the master unit 3 of the extension call device 1b via the network adapter 4 and the server device 5 (S18), and the extension call It can respond to the visitor who operated the intercom 2 of the extension call device 1a on the base unit 3 side of the device 1b (S19). Thereafter, the base unit 3 of the extension extension call device 1b as the transfer destination determines whether a predetermined call time elapses from the start of answering or whether a call end operation is performed (S20). A signal indicating the end of the call is sent to the server device 5 through the network adapter 4, the call line between the extension call device 1a and the door phone child unit 2 is closed, and the call with the door phone child device 2 is ended.

  Further, in the base unit 3 of the extension call device 1b, if there is no response operation by the dweller (that is, the operation of the call button 38a) as a result of the determination in S16, the CPU 30 outputs a predetermined call waiting time after outputting the ring tone. It is determined whether or not the time has elapsed (S21), and if the call waiting time has elapsed (that is, if the call button 38a is not operated after the ringing sound is output until the call waiting time elapses), The process is terminated, and the extension call is not performed with the intercom 2 of the extension call device 1a as the transfer source.

  Further, the CPU 30 of the base unit 3 of the extension telephone 1a confirms the presence / absence setting (setting of the mode selection SW 37) in S12, and if it is present (normal mode), it calls from the speaker SP on the dwelling unit A side. After the sound is sounded, it is monitored whether or not the call button 38a is operated (S23). When the resident of the dwelling unit A presses the call button 38a to respond to the door phone call, the CPU 30 A call line between the door phone slave unit 2 is opened and an extension call is performed between the door phone slave unit 2 and the base unit 3 (S24), and a predetermined call time has elapsed from the start of the call, or It is determined whether or not an operation for terminating the call is performed (S25). If it is determined that the call is terminated, the line with the intercom 2 is closed and the extension call is terminated. As a result of the determination in S23, if there is no response operation by the resident (that is, operation of the call button 38a), the CPU 30 determines whether or not a predetermined call waiting time has elapsed since the ringing tone was output ( S26) If the call waiting time has elapsed (that is, if the call button 38a has not been operated after the ringing tone is output until the call waiting time elapses), the process is terminated, and the doorphone sub-unit 2 Do not make internal calls with.

  As described above, in this system, a predetermined operation (doorphone slave unit) is performed on at least one of the doorphone slave unit 2 or the master unit 3 of the extension call devices 1a and 1b connected to the server device 5 via the network line NT. 2 is performed, or the CPU 30 of the parent device 3 performs the address of the transmission partner stored in the own address and the extension address storage unit 35 and the predetermined operation. A transmission signal including a corresponding command signal is transmitted from the network adapter 4, and the server apparatus 5 that has received the transmission signal transmits the transmission signal to the base unit 3 corresponding to the address of the transmission partner included in the transmission signal. When the transmission source address and the command signal are transmitted, the CPU 30 in the transmission partner base unit 3 sends the transmission source corresponding to the command signal included in the received transmission signal. Since the operation for forming a communication line with the base unit 3 is performed, the extension call apparatus 1a, 1B, and the extension call apparatus 1a, without laying a dedicated communication line between the extension call apparatuses 1a, 1b installed in different places A telephone line can be formed between 1b to perform a telephone call.

  In addition, when the operation mode of the CPU 30 is switched to the absence mode using the mode selection SW 37, when a call signal from the intercom child device 2 directly connected to the parent device 3 is input to the parent device 3, the CPU 30 The network adapter 4 transmits a transmission signal including its own address, the address of the other party stored in the extension address storage unit 35, and a command signal for ringing the ringing tone. Then, when the server device 5 that has received the transmission signal transmits the transmission source address and the command signal included in the transmission signal to the base unit 3 corresponding to the address of the transmission partner included in the transmission signal, In the other party's base unit 3, the CPU 30 sounds a ringing tone, and when a response operation is performed for the call, a call is made between the server device 5 and the caller's doorphone slave unit 2 via the caller's base unit 3. Since the line is formed, when the dwelling unit in which any of the extension call devices 1a (or 1b) is absent, the extension call device 1b (or 1a) of another dwelling unit registered in advance is used as a visitor instead. Action can be taken.

  Further, in the base unit 3 of any of the extension call devices 1a and 1b, the CPU 30 sends a transmission signal including its own address, the address of the call destination, and a command signal corresponding to the base unit call operation in response to the base unit call operation. When the server apparatus 5 that is transmitted from the adapter 4 and receives the transmission signal transmits the transmission source address and the command signal included in the transmission signal to the base unit 3 corresponding to the call destination address included in the transmission signal. In the callee base unit 3, the CPU 30 sounds a ringing tone, and when a response operation for the call is performed, a call line is formed with the caller base unit 3 via the server device 5. Even if a telephone is not used between the dwelling units A and B, it is possible to make a call using the base unit 3 of the extension call devices 1a and 1b, thereby improving convenience and reducing communication costs.

  By the way, in this embodiment, when a visitor call transfer operation or a parent device call operation is performed in any of the extension call devices 1a and 1b, the address from the parent device 3 and the address and operation of the partner parent device 3 are handled. The transmission signal including the command signal is transmitted to the server device 5, but the memory 52 of the server device 5 stores the address of the transfer source parent device 3 and the transfer destination parent device 3 at the time of the visitor call transfer. If data indicating the correspondence relationship and data indicating the correspondence relationship between the address of the caller parent device 3 and the address of the callee parent device 3 at the time of calling the parent device are stored, the visitor call transfer operation and the parent device are performed. Only the command signal corresponding to its own address and operation is transmitted to the server device 5 from the base unit 3 of the extension telephones 1a and 1b where the call operation has been performed, and the server device 5 stores it in the memory 52. Day Based on the above, a command signal is transmitted to the base unit 3 corresponding to the address of the base unit 3 of the transmission source, and the server device 5 transmits a signal related to the call (call signal or video signal) between the base units 3 and 3. By relaying, a call can be made between the transfer source intercom unit 2 and the transfer destination master unit 3 or between the call source master unit 3 and the call destination master unit 3.

  Further, only the command signal corresponding to the operation and the address of the transfer destination or call destination base unit 3 are sent to the server unit 5 from the base unit 3 of the extension call device 1a, 1b where the visitor call transfer operation or the base unit call operation is performed. When the server apparatus 5 transmits a command signal to the transmission destination parent device 3 and receives a response from the transmission destination parent device 3, the server device 5 transmits the command signal based on the data stored in the memory 52. By relaying a signal (call signal or video signal) related to a call between the transfer destination or call destination master unit 3 and the transfer source or call source master unit 3, A call can be made between the parent device 3 of the transfer destination or between the parent device 3 of the call source and the parent device 3 of the call destination.

  In the above-described embodiment, the network adapter 4 having a network communication function is formed separately from the parent device 3, but the function of the network adapter 4 may be built in the parent device 3.

  In addition, it is apparent that a wide variety of different embodiments can be configured without departing from the spirit and scope of the present invention, and the present invention is not limited to the specific embodiments.

(A)-(c) is a block diagram of each part of the intercom system of this embodiment. It is a schematic block diagram of an intercom system same as the above. It is a flowchart explaining operation | movement same as the above. It is a flowchart explaining other operation | movement same as the above.

Explanation of symbols

1a, 1b Extension telephone device 2 Door phone slave unit 3 Master unit 4 Net adapter (network communication means)
5 Server device 30 CPU (control means)
35 Extension address storage unit (storage means)
51 Control unit (communication control means)
L1 communication line NT network line

Claims (4)

A plurality of extension call devices that perform an extension call between the doorphone slave unit and the interphone master unit, with the doorphone slave unit installed at the entrance and the interphone master unit installed indoors connected via a communication line; ,
A plurality of intercom master units connected to each other via a network line,
When a predetermined operation is performed on each interphone master unit by at least one of the network communication means for communicating with the server device via the network line and the door phone slave unit or the interphone master unit, the operation is performed. When the transmission signal including the command signal corresponding to the transmission signal is transmitted from the network communication means and the network communication means receives the transmission signal transmitted from the server device, the transmission intercom parent corresponding to the command signal included in the transmission signal is received. Control means for performing an operation for forming a communication line with the machine,
An interphone comprising a communication control means for transmitting a command signal included in the received transmission signal to a corresponding interphone base unit when the server device receives a transmission signal transmitted from any interphone base unit. system.   Either the normal mode for responding to a call from the doorphone slave unit or the answering mode for transferring a call from a doorphone slave unit to the other extension call device as the operation mode of the control means for each interphone master unit Mode selection means is provided for selecting whether or not when the call operation is performed by the door phone slave unit as the predetermined operation in the absence mode, the control means sends a command signal for sounding a ring tone from the transfer destination interphone master unit In the extension call device at the transfer destination that has received the transmission signal including the command signal for causing the network communication means to transmit the transmission signal including the command signal for causing the server device to ring the ringing tone, the control means of the interphone master unit transmits the ringing tone. When a response operation for a call is performed, the server device and the transfer source interphone master unit are used. Intercom system of claim 1, wherein the forming the communication line between the doorphone entrance instrument Demoto.   The predetermined operation includes a base unit call operation for calling an interphone base unit of another extension telephone device from the interphone base unit, and the control unit of the interphone base unit performs a call destination call when the base unit call operation is performed. In the extension call device that has transmitted a transmission signal including a command signal for ringing a ringing tone from the intercom base unit from the network communication means and received the transmission signal including a command signal for ringing the ringing tone from the server device, 2. The control unit of the machine makes a ringing tone and forms a call line with the interphone master unit of the caller via the server device when a response operation to the call is performed. The listed intercom system.   Individual addresses are assigned to the plurality of interphone master units, and each interphone master unit is provided with storage means for storing the addresses assigned to the interphone master unit of the communication partner, and the doorphone slave unit or the interphone master unit is provided. When at least one of the predetermined operations is performed, the control unit of the intercom base unit transmits a transmission signal including its own address, an address stored in the storage unit, and a command signal corresponding to the operation to the network. When a transmission signal is transmitted from the communication unit and the network communication unit receives the transmission signal transmitted from the server device, a communication line is formed with the transmission interphone master unit corresponding to the command signal included in the transmission signal. And the communication control means of the server device is transmitted from any interphone master unit. 4. When receiving a signal, the transmission source address and the command signal included in the transmission signal are transmitted to the interphone master unit corresponding to the address of the communication partner included in the transmission signal. The intercom system according to claim 1.

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