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主要介绍一种应用在工业通信系统中的无线与有线选呼转接器的设计。具体的实现方法是利用亚音频为媒介,通过单片机控制芯片发送和接收亚音频来选择呼叫分配了不同亚音频的设备。设备可让有线通信设备按不同的按键来呼叫不同的无线手持机。无线手持机也可通过旋转开关来呼叫不同的有线通信设备。可同时接入选呼系统的通信终端可达39个,如果使用数字亚音频可达到83个。
This paper mainly introduces the design of wireless and wired selective call switch used in industrial communication system. The specific method is to use sub-audio as a medium, through the microcontroller control chip to send and receive sub-audio to select the call assigned to different sub-audio equipment. The device allows wired communication devices to press different buttons to call different wireless handsets. Wireless handsets can also call different wired communication devices by rotating the switch. Up to 39 communication terminals can access the selective call system at the same time, up to 83 if using digital audio.