一、概述无线通信系统之一的对讲机通信系统,虽然在使用上和功能拓展上存在较大的局限性,但以其安全可靠、迅速灵敏、运行费用较低等无可替代的优点,在我国近年来迅速普及到公路、航海、航空、铁路、公安、消防、工矿、机关、物业管理、建筑施工部门,加上近几年来随着微电子技 First, outlines one of the wireless communication system intercom communication system, although there are major limitations in the use and function development, but its safe, reliable, fast and sensitive, low operating costs and other irreplaceable advantages in our country In recent years, the rapid popularization of roads, navigation, aviation, railways, public security, fire protection, mining, machinery, property management, construction and construction departments, coupled with the recent years with microelectronics