On the basis of the characteristics of the objectives of supervisory control, it is pointed out that the existing telephone net and PABX can be used to implement remote supervisory control.

• 该设计根据监控对象的特点,利用现有的电话网络和程控交换机实现远程监控,不需要专用通信传输通道,不需要增加硬件和软件,成本低,技术成熟,容易实现。