Design consultation for wired intercom systems

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These days, when designing wired radio communication systems, people decide whether to use devices with a main unit or those without one, and as for functions, they choose between multiple functions or just basic two-way communication functionality. Currently, there are fully digital mainframe-based voice dispatching and broadcasting alarm systems that enable fire alarms to be transmitted through wired intercoms for broadcasting alerts; wireless intercoms can also be integrated seamlessly with wired ones. There are also telephone systems and entertainment broadcasting systems – I’m not sure if anyone has come across such approaches in their design work. At present, some host-based devices have not been promoted because design institutes that specialize in host-based systems have been using existing designs for many years; they do not want to increase their workload, and they are also unaware of the existence of such host-based devices. I would like to know everyone’s true opinions! I’d like to exchange experiences with experts in the communications field! ! ! ! !