Cluster intercom system

Abstract

The invention discloses a cluster intercom system, and the system comprises a first terminal which comprises a first network audio converter and an interphone which are connected in a wired manner; the second terminal comprises a second network audio converter and a cluster talkback gateway which are connected in a wired mode, the first network audio converter and the second network audio converter are in network communication connection through an internet protocol, and the cluster talkback gateway is further used for communicating with a multimedia session system through a session initiation protocol. By means of the mode, the interphone and the cluster intercom gateway can get rid of distance limitation, and therefore the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the field of communication networks, and in particular to a cluster intercom system. Background Art

[0002] With the development of communication technology, in the fields of public security, fire fighting, emergency rescue, etc., it is necessary to retain the advantages of traditional cluster intercom systems while being able to interconnect with modern IP telephone systems. The solution currently adopted in the existing technology is to perform back-to-back docking through cluster gateway intercoms, in which the cluster intercom gateway is connected to the VoIP system through the SIP protocol on the one hand, and is connected to the intercom through an analog audio interface on the other hand.

[0003] However, this method is limited by the transmission characteristics of analog audio signals. The length of the audio cable cannot exceed 10 meters, so the intercom and the cluster intercom gateway must be placed in the same computer room. First, the intercom needs to be charged regularly, but the computer room environment is not suitable for placing charging equipment. Secondly, intercom equipment generally has multiple working channels, and channel switching is often required in actual applications. However, since the equipment is placed in the computer room, operators cannot easily adjust the channels. Finally, the location of the computer room is often selected from the perspective of communication line deployment. Such a location may affect the wireless signal quality of the intercom, resulting in poor communication effects. Summary of the invention

[0004] The present application mainly provides a cluster intercom system to solve the poor user experience caused by the distance between the intercom and the cluster intercom gateway.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a cluster intercom system, including: a first terminal, including a first network audio converter and an intercom connected by a wire; a second terminal, including a second network audio converter and a cluster intercom gateway connected by a wire, the first network audio converter and the second network audio converter are connected by Internet Protocol network communication, and the cluster intercom gateway is also used to communicate with the multimedia session system through the session initiation protocol.

[0006] In some embodiments, the cluster intercom system includes a compressed audio stream transmission mode; the sending end samples the analog audio signal output by the intercom or the cluster intercom gateway through an analog-to-digital converter to generate a corresponding digital audio signal, encodes and compresses the sampled digital audio signal through a digital signal processor, and encapsulates the compressed digital audio signal into the RTP data packet according to the RTP protocol, and sends the RTP data packet to the receiving end; wherein the sending end is one of the first network audio converter and the second network audio converter, and the receiving end is the other of the first network audio converter and the second network audio converter.

[0007] In some embodiments, the receiving end obtains the RTP data packet, parses the RTP data packet to extract the compressed digital audio signal, decompresses the compressed digital audio signal to obtain the corresponding digital audio signal, restores the digital audio signal to the analog audio signal through a digital-to-analog converter, and correspondingly sends the analog audio signal to the intercom or the cluster intercom gateway.

[0008] In some embodiments, the cluster intercom system includes a PCM original audio stream transmission mode; the sending end samples the analog audio signal sent by the intercom or the cluster intercom gateway through an analog-to-digital converter to obtain PCM data for the analog audio signal, and encapsulates the PCM data into the RTP data packet to send it to the receiving end.

[0009] In some embodiments, the receiving end parses the RTP data packet to extract the PCM data, and restores the PCM data to the analog audio signal through a digital-to-analog converter, and correspondingly sends the analog audio signal to the intercom or the cluster intercom gateway.

[0010] In some embodiments, the cluster intercom system switches to the compressed audio stream transmission mode when the bandwidth resources reach the preset bandwidth condition, and switches to the PCM original audio stream transmission mode when the bandwidth resources do not reach the preset bandwidth condition.

[0011] In some embodiments, the transmitting end includes a first optocoupler and a first MCU; the first optocoupler is used to change the conduction state of the first optocoupler in response to the control signal sent by the intercom or the cluster intercom gateway, and the first MCU is used to detect the conduction state of the first optocoupler, and generate a control command based on the change of the conduction state, encapsulate the control command into a second data packet, and send the second data packet to the receiving end network audio converter through a first transmission protocol; wherein the transmitting end is one of the first network audio converter and the second network audio converter, and the receiving end is the other of the first network audio converter and the second network audio converter.

[0012] In some embodiments, the receiving end includes a second optocoupler and a second MCU; the second MCU is used to parse the second data packet sent by the sending end to obtain the corresponding control command, and change the conduction state of the second optocoupler based on the control command to control the intercom or the cluster intercom gateway accordingly.

[0013] In some embodiments, the first optocoupler is further used to provide electrical isolation between the control signal and the first MCU; the second optocoupler is further used to provide electrical isolation between the control signal and the second MCU.

[0014] In some embodiments, the second data packet is a data packet based on the TCP protocol or a data packet based on the UDP protocol.

[0015] The beneficial effects of the present application are as follows: Different from the prior art, the present application discloses a cluster intercom system, including a first terminal, including a first network audio converter and an intercom connected by wire; a second terminal, including a second network audio converter and a cluster intercom gateway connected by wire, the first network audio converter and the second network audio converter are connected by Internet Protocol network communication, and the cluster intercom gateway is also used to communicate with the multimedia session system through the session initiation protocol; the Internet protocol network connection between the first terminal and the second terminal is constructed by the first network audio converter and the second network audio converter instead of the audio cable connection, so that the distance between the intercom device and the cluster intercom gateway can be eliminated, thereby optimizing the communication environment of the intercom device and facilitating maintenance and adjustment. At the same time, the connection based on the Internet Protocol network can break through the distance transmission limitation, realize the cross-regional deployment between the intercom device and the cluster intercom gateway, support multi-device access, and the digital transmission through the network has stronger anti-interference ability, which is conducive to optimizing the user experience of the cluster intercom system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 It is a structural diagram of an embodiment of a cluster intercom system provided by the present application;

[0018] Figure 2 It is a structural diagram of an embodiment of a sending end in a cluster intercom system;

[0019] Figure 3 It is a structural diagram of an embodiment of a receiving end in a cluster intercom system. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] The terms "first", "second", "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] See also Figure 1 , Figure 1 1 is a schematic diagram of a structure of an embodiment of a cluster intercom system provided by the present application. The cluster intercom system 1000 includes:

[0024] The first terminal 100 includes a first network audio converter 110 and an intercom 120 connected by wire.

[0025] The intercom 120 is used to generate and receive audio signals and is a device for direct user interaction.

[0026] The first network audio converter 110 converts the analog audio signal generated by the intercom 120 into a digital signal and sends it to the second terminal 200 through the Internet protocol network. At the same time, it can also receive the control signal from the second terminal 200 and convert it into a signal that the intercom 120 can understand.

[0027] The second terminal 200 includes a second network audio converter 210 and a cluster intercom gateway 220 connected by wire. The first network audio converter 110 and the second network audio converter 210 are connected by Internet Protocol network communication. The cluster intercom gateway 220 is also used to communicate with the multimedia session system through the session initiation protocol.

[0028] The cluster intercom gateway 220 is responsible for processing the communication between multiple intercom devices, including call establishment, answering, priority management, etc. In addition, the cluster intercom gateway 220 also supports communication with multimedia session systems such as video conferencing systems, telephone conferencing systems or voice transmission systems based on Internet Protocol (Voice over Internet Protocol, VoIP) through Session Initiation Protocol (SIP) to achieve more extensive communication integration.

[0029] The second network audio converter 210 receives the digital audio signal from the first terminal 100 and converts it back into an analog signal for processing by the cluster intercom gateway 220. At the same time, it can also convert the control signal generated by the cluster intercom gateway 220 into a digital signal and send it to the first terminal 100 through the Internet protocol network.

[0030] Specifically, when the intercom 120 of the first terminal 100 generates an audio signal, the first network audio converter 110 converts it into a digital signal and sends it to the second terminal 200 through the Internet Protocol network. The second network audio converter 210 receives the digital signal and converts it back into an analog signal, which is then transmitted to the cluster intercom gateway 220 for processing. The cluster intercom gateway 220 broadcasts the audio signal to other intercom devices as needed.

[0031] Transmitting audio and control signals over the Internet Protocol (IP) network enables long-distance communication, which is no longer limited by the physical distance of traditional analog audio signal transmission; digital signal transmission has higher anti-interference ability and stability, which is conducive to improving communication quality; at the same time, the IP network-based architecture makes the system easy to expand and integrate with other communication systems.

[0032] Optionally, the trunked intercom system 1000 includes a compressed audio stream transmission mode.

[0033] The sending end 10 samples the analog audio signal output by the intercom 120 or the cluster intercom gateway 220 through an analog-to-digital converter to generate a corresponding digital audio signal, encodes and compresses the sampled digital audio signal through a digital signal processor, and encapsulates the compressed digital audio signal into an RTP data packet according to the RTP protocol, and sends the RTP data packet to the receiving end 20.

[0034] The transmitting end 10 (the first network audio converter 110 or the second network audio converter 210) samples the analog audio signal output by the intercom 120 or the cluster intercom gateway 220 through an analog-to-digital converter (ADC); the sampling process converts the continuous analog audio signal into a discrete digital audio signal. The sampled digital audio signal is encoded and compressed by a digital signal processor (DSP) to reduce the amount of data so that it can be transmitted more efficiently on the network. The compressed digital audio signal is encapsulated into an RTP data packet according to the real-time transport protocol (RTP); the encapsulated RTP data packet is sent to the receiving end 20 through the network.

[0035] Among them, the real-time transport protocol is used to transmit real-time audio and video data on the Internet.

[0036] The receiving end 20 obtains the RTP data packet, parses the RTP data packet to extract the compressed digital audio signal, decompresses the compressed digital audio signal to obtain the corresponding digital audio signal, restores the digital audio signal to an analog audio signal through a digital-to-analog converter, and correspondingly sends the analog audio signal to the intercom 120 or the cluster intercom gateway 220.

[0037] The receiving end 20 (the other of the first network audio converter 110 or the second network audio converter 210) obtains the RTP data packet from the network and parses the RTP data packet to extract the compressed digital audio signal. The extracted compressed digital audio signal is decompressed to restore it to the original digital audio signal, and the decompressed digital audio signal is restored to an analog audio signal through a digital-to-analog converter (DAC). The restored analog audio signal is sent to the intercom 120 or the cluster intercom gateway 220 to complete the entire audio signal transmission process.

[0038] The transmitting end 10 is one of the first network audio converter 110 and the second network audio converter 210 , and the receiving end 20 is the other of the first network audio converter 110 and the second network audio converter 210 .

[0039] Specifically, when the sending end 10 is the first network audio converter 110, it samples the analog audio signal output from the intercom 120 and sends it to the receiving end 20, that is, the second network audio converter 210, after encoding and compression. The second network audio converter 210 restores the received RTP data packet and sends the restored analog audio signal to the cluster intercom gateway 220.

[0040] Similarly, when the sending end 10 is the second network audio converter 210, the receiving end 20 is correspondingly the first network audio converter 110, and the analog audio signal is sent from the cluster intercom gateway 220 to the intercom 120 after being processed by the first network audio converter 110 and the second network audio converter 210.

[0041] In scenarios across wide area networks or where bandwidth is limited, the cluster intercom system 1000 uses a compressed audio stream mode and reduces bandwidth requirements through audio codec technology to ensure the flow of analog signal transmission.

[0042] Optionally, the trunking intercom system 1000 includes a PCM raw audio stream transmission mode.

[0043] The sending end 10 samples the analog audio signal output by the intercom 120 or the cluster intercom gateway 220 through an analog-to-digital converter to obtain PCM data for the analog audio signal, and encapsulates the PCM data into an RTP data packet to send to the receiving end 20.

[0044] The transmitting end 10 (the first network audio converter 110 or the second network audio converter 210) samples the analog audio signal output by the intercom 120 or the cluster intercom gateway 220 through an analog-to-digital converter (ADC); the sampling result is pulse code modulation (PCM) data, which represents the digital form of the analog audio signal. The transmitting end 10 encapsulates the PCM data into an RTP data packet, which contains the header information of the audio data (such as timestamp, sequence number, etc.) and the actual PCM data payload. The encapsulated RTP data packet is then sent to the receiving end 20 through the network.

[0045] The receiving end 20 parses the RTP data packet to extract the PCM data, and restores the PCM data to an analog audio signal through a digital-to-analog converter, and correspondingly sends the analog audio signal to the intercom 120 or the cluster intercom gateway 220 .

[0046] The receiving end 20 (the other of the first network audio converter 110 or the second network audio converter 210) receives the RTP data packet from the network, parses the received RTP data packet to extract the PCM data therein. The extracted PCM data is restored to an analog audio signal through a digital-to-analog converter (DAC); wherein the restored analog audio signal retains the waveform and characteristics of the original audio signal. The restored analog audio signal is sent to the intercom 120 or the cluster intercom gateway 220 for user use or further processing.

[0047] The transmitting end 10 is one of the first network audio converter 110 and the second network audio converter 210 , and the receiving end 20 is the other of the first network audio converter 110 and the second network audio converter 210 .

[0048] Specifically, when the sending end 10 is the first network audio converter 110, it samples the analog audio signal output from the intercom 120 and sends it to the receiving end 20, that is, the second network audio converter 210, after encoding and compression. The second network audio converter 210 restores the received RTP data packet and sends the restored analog audio signal to the cluster intercom gateway 220.

[0049] Similarly, when the sending end 10 is the second network audio converter 210, the receiving end 20 is correspondingly the first network audio converter 110, and the analog audio signal is sent from the cluster intercom gateway 220 to the intercom 120 after being processed by the first network audio converter 110 and the second network audio converter 210.

[0050] In a LAN or an environment with sufficient bandwidth, the trunking intercom system 1000 uses the PCM original audio stream mode to obtain better sound quality and lower latency.

[0051] Optionally, the cluster intercom system switches to a compressed audio stream transmission mode when the bandwidth resources reach a preset bandwidth condition, and switches to a PCM original audio stream transmission mode when the bandwidth resources do not reach the preset bandwidth condition.

[0052] In scenarios across wide area networks or where bandwidth is limited, bandwidth resources are often limited. Direct transmission of PCM raw audio streams may cause excessive bandwidth usage, thereby affecting the normal operation of other network applications or causing a decrease in audio transmission quality. By adopting the compressed audio stream mode, the trunking intercom system 1000 can significantly reduce bandwidth requirements and ensure that audio signals can still be transmitted smoothly under bandwidth-limited conditions.

[0053] In a LAN or bandwidth-sufficient environment, bandwidth resources are relatively abundant. In this case, the PCM original audio stream mode can make full use of bandwidth resources to obtain better sound quality and lower latency. The PCM original audio stream is uncompressed, retaining the original details and characteristics of the audio signal, so the sound quality is better.

[0054] The trunking intercom system 1000 can dynamically switch the transmission mode according to the changes in the network environment, thereby optimizing the use of network resources. By intelligently switching the transmission mode, the trunking intercom system 1000 can reduce network costs while ensuring communication quality.

[0055] Specifically, see Figure 2The transmitting end 10 includes a first optical coupler 11 and a first MCU 12 .

[0056] The first optocoupler 11 is used to change the conduction state of the first optocoupler 11 in response to the control signal sent by the intercom 120 or the cluster intercom gateway 220, and the first MCU 12 is used to detect the conduction state of the first optocoupler 11, and generate a control command based on the change of the conduction state, encapsulate the control command into a second data packet, and send the second data packet to the receiving end 20 network audio converter through the first transmission protocol.

[0057] The intercom 120 or the cluster intercom gateway 220 sends a control signal, which may represent an operation instruction, such as a call request, a hang-up request, etc. The first optical coupler 11 changes its conduction state in response to the control signal sent by the intercom 120 or the cluster intercom gateway 220; the light-emitting diode (LED) inside the optical coupler is turned on or off, thereby controlling the conduction or cutoff of the phototransistor or other photoelectric device. The first MCU 12 detects the change in the conduction state of the first optical coupler 11 to identify the control signal sent by the intercom 120 or the cluster intercom gateway 220. Based on the detected change in the conduction state, the first MCU 12 generates a corresponding control command. The control command is encapsulated as a second data packet, which has information such as an identifier and parameters of the control command. The first MCU 12 sends the second data packet to the receiving end 20 network audio converter through a first transmission protocol.

[0058] See also Figure 3 The receiving end 20 includes a second optical coupler 21 and a second MCU 22 .

[0059] The second MCU 22 is used to parse the second data packet sent by the transmitter 10 to obtain a corresponding control command, and change the conduction state of the second optical coupler 21 based on the control command to control the intercom 120 or the cluster intercom gateway 220 accordingly.

[0060] The network audio converter at the receiving end 20 receives the second data packet from the transmitting end 10, and the second MCU 22 parses the data packet to extract the control command therein. Based on the parsed control command, the second MCU 22 changes the conduction state of the second optical coupler 21. This is also achieved by controlling the LED inside the optical coupler to light up or go out. The change in the conduction state of the second optical coupler 21 is detected by the intercom 120 or the cluster intercom gateway 220, which triggers corresponding operations such as answering a call, hanging up a call, etc.

[0061] The transmitting end 10 is one of the first network audio converter 110 and the second network audio converter 210 , and the receiving end 20 is the other of the first network audio converter 110 and the second network audio converter 210 .

[0062] Specifically, when the sending end 10 is the first network audio converter 110, a control signal is generated based on the control command output by the intercom 120 and sent to the receiving end 20, that is, the second network audio converter 210. The second optocoupler 21 and the second MCU 22 restore the control instruction based on the received control signal, and send the restored control instruction to the cluster intercom gateway 220 accordingly.

[0063] Similarly, when the sending end 10 is the second network audio converter 210, the receiving end 20 is correspondingly the first network audio converter 110, and the control command is sent from the cluster intercom gateway 220 to the intercom 120 after being processed by the first network audio converter 110 and the second network audio converter 210.

[0064] By detecting and controlling the conduction state of the optocoupler by the MCU and sending data packets using a reliable transmission protocol, the system ensures accurate transmission of control signals.

[0065] Furthermore, the first optical coupler 11 is also used to provide electrical isolation between the control signal and the first MCU 12. The second optical coupler 21 is also used to provide electrical isolation between the control signal and the second MCU 22.

[0066] The optocoupler provides electrical isolation between the transmitting end 10 and the receiving end 20, effectively preventing electrical interference and damage.

[0067] Optionally, the second data packet is a data packet based on the TCP protocol or a data packet based on the UDP protocol.

[0068] The Transmission Control Protocol (TCP) is a connection-oriented, reliable, byte-stream-based transport layer communication protocol. Before data transmission, TCP establishes a stable connection through a three-way handshake to ensure that both parties of the data transmission are ready to receive and send data.

[0069] User Datagram Protocol (UDP) is a connectionless, datagram-oriented transport layer protocol. UDP does not require a connection to be established before sending data, and there is no clear communication link between the sender and the receiver. This reduces the additional connection establishment and disconnection overhead, making data transmission more efficient.

[0070] According to actual usage requirements, select the transmission method based on TCP protocol or UDP protocol and the corresponding data packet.

[0071] Different from the prior art, the present application provides a cluster intercom system 1000, which converts the original audio line connection into a network connection by adding a network audio converter between the intercom 120 and the cluster intercom gateway 220, and transmits analog audio data and control commands between the intercom 120 and the cluster intercom gateway 220 through the network. At the same time, network transmission breaks through the distance limitation, realizes cross-regional deployment, and breaks through the limitation of equipment placement between the intercom 120 and the cluster intercom gateway 220, so that the intercom 120 can be placed in a control room with good signal, which is convenient for daily charging maintenance and channel adjustment; in addition, the digital transmission method through the network is conducive to improving the anti-interference ability of the signal, and is easy to manage and maintain, which is conducive to reducing equipment maintenance costs. The cluster intercom system 1000 based on network connection also supports multi-device access, realizes remote communication and control between multiple devices, and effectively improves the user experience of the cluster intercom system 1000.

[0072] The above description is only an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A cluster intercom system, characterized in that: include: A first terminal including a first network audio converter and an intercom connected by wire; The second terminal includes a second network audio converter and a cluster intercom gateway connected by wire, the first network audio converter and the second network audio converter are connected by Internet Protocol network communication, and the cluster intercom gateway is also used to communicate with the multimedia session system through the session initiation protocol.

2. The cluster intercom system according to claim 1, characterized in that: The cluster intercom system includes a compressed audio stream transmission mode; The sending end samples the analog audio signal output by the intercom or the cluster intercom gateway through an analog-to-digital converter to generate a corresponding digital audio signal, encodes and compresses the sampled digital audio signal through a digital signal processor, and encapsulates the compressed digital audio signal into the RTP data packet according to the RTP protocol, and sends the RTP data packet to the receiving end; The transmitting end is one of the first network audio converter and the second network audio converter, and the receiving end is the other of the first network audio converter and the second network audio converter.

3. The cluster intercom system according to claim 2, characterized in that: The receiving end obtains the RTP data packet, parses the RTP data packet to extract the compressed digital audio signal, decompresses the compressed digital audio signal to obtain the corresponding digital audio signal, restores the digital audio signal to the analog audio signal through a digital-to-analog converter, and correspondingly sends the analog audio signal to the intercom or the cluster intercom gateway.

4. The cluster intercom system according to claim 2, characterized in that: The cluster intercom system includes a PCM original audio stream transmission mode; The transmitting end samples the analog audio signal output by the intercom or the cluster intercom gateway through an analog-to-digital converter to obtain PCM data for the analog audio signal, and encapsulates the PCM data into the RTP data packet to send to the receiving end.

5. The cluster intercom system according to claim 4, characterized in that: The receiving end parses the RTP data packet to extract the PCM data, and restores the PCM data to the analog audio signal through a digital-to-analog converter, and correspondingly sends the analog audio signal to the intercom or the cluster intercom gateway.

6. The cluster intercom system according to claim 4, characterized in that: The cluster intercom system switches to the compressed audio stream transmission mode when the bandwidth resources reach the preset bandwidth condition, and switches to the PCM original audio stream transmission mode when the bandwidth resources do not reach the preset bandwidth condition.

7. The cluster intercom system according to claim 1, characterized in that: The transmitting end includes a first optical coupler and a first MCU; The first optical coupler is used to change the conduction state of the first optical coupler in response to the control signal sent by the intercom or the cluster intercom gateway, and the first MCU is used to detect the conduction state of the first optical coupler, and generate a control command based on the change of the conduction state, encapsulate the control command into a second data packet, and send the second data packet to the receiving end network audio converter through the first transmission protocol; The transmitting end is one of the first network audio converter and the second network audio converter, and the receiving end is the other of the first network audio converter and the second network audio converter.

8. The cluster intercom system according to claim 7, characterized in that: The receiving end includes a second optical coupler and a second MCU; The second MCU is used to parse the second data packet sent by the sending end to obtain the corresponding control command, and change the conduction state of the second optical coupler based on the control command to correspondingly control the intercom or the cluster intercom gateway.

9. The cluster intercom system according to claim 8, characterized in that: The first optocoupler is further used to provide electrical isolation between the control signal and the first MCU; the second optocoupler is further used to provide electrical isolation between the control signal and the second MCU.

10. The cluster intercom system according to claim 8, characterized in that: The second data packet is a data packet based on the TCP protocol or a data packet based on the UDP protocol.

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