采用先进的GSM通信模块和单片机互连的终端系统，，借助最可靠、最成熟的GSM 移动网络，以最直观的中文短信和TEXT短信发送或电话形式，直接把报警地点的情况反映到用户的手机上-The use of advanced communication module and GSM terminal MCU interconnection system, with the most reliable and most mature GSM mobile network, the most intuitiv

实现C51与sim300模块联合后的域名连接功能。-C51 with sim300 module joint domain connectivity.