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90年代以来，随着国内无线通信事业的发展，很多专业部门都先后引进了800MHz无线集群通信设备。友利电ESAS800MHz无线集群系统由于采用分散式控制结构，联网比较经济、简便，因而获得了广泛的应用。随着ESAS集群基站越来越多，特别是对通信设备无人值守要求的提高，ESAS系统本
Since the 90s, with the development of domestic wireless communications, many professional departments have successively introduced 800MHz wireless trunking communications equipment. Woori electricity ESAS800MHz wireless cluster system as a result of decentralized control structure, networking more economical and simple, and thus has been widely used. With more and more ESAS cluster base stations, especially for unattended communications equipment, the ESAS system