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传呼器从电路设计类型上可分为三种形式，第一种类型：电话交换机型，这种机型的特点是每一张病床需配一根信号传送线。病区内有多少张床，就需要多少根导线。安装麻烦但主机电路设计简单。容易实现对讲。第二种类型：采用数字脉冲技术，把床位号进行数字脉冲编码后传送到终端
The pager can be divided into three types from the circuit design type. The first type is the telephone exchange type. The feature of this type of machine is that each bed needs to be equipped with a signal transmission line. How many beds are needed in a ward, how many wires are needed. Installation is troublesome but the host circuit design is simple. Easy to implement intercom. The second type: using digital pulse technology, digitally pulse code the bed number and transmit it to the terminal