PSTN-Based Inrelligent Home Control System

With the application of advanced computer technology, network communication technology, cabling technology, and wireless technology, various home life-related subsystems can be combined and the idea of intelligent remote control of home are enabled. By using the combination of advanced computer, communications and control technology, intelligent home means to establish a family management system of integrated services, including home security system, network services system and home automation system. Comprehensive security protection and facilitation the communication network can be achieved by the intelligent home system.Based on the analyses on intelligent home, a public telephone network-based intelligent home control system is established in this study. How to monitor a variety of home appliances through the telephone network with the single-chip controller is mainly investigated by the system. It also elaborately interprets the principle of the DTMF signal receiving and decoding, the applications of the MT8870 chip receiver circuit, and how to control home appliances through the telephone as well. According to the voice prompt signal, the caller can handle the household appliances through the remote control.Based on PSTN, the remote control of home appliances can be achieved. Compared to the conventional ways, such as radio remote control, wired remote control, infrared and ultrasound remote control, PSTN remote control has a certain degree of superiority: no special wiring is needed; radio frequency resources are not occupied; and electromagnetic pollution are avoided. At the same time, based on the fact that telephone lines are joined into a network, PSTN remote control can take full advantage of the existing telephone network, control remote distance across the provinces and the cities, and provide wide range of applications.