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2001年7月,信息产业部发布了518号文件。文件要求停止为800MHz模拟集群系统指配频率,对于运行较好的模拟集群网,原则上可继续使用到2005年12月31日。对于800MHz数字集群通信系统,要搞好频率使用规划,加强集中管理。 518号文件,对于不温不火的集群通信市场,不啻是釜底“加”薪。518号文件表明了主管部门对于数字集群通信发展的导向。敏感人士可能会意识到:在数字化迅速渗
July 2001, the Ministry of Information Industry issued a document No. 518. File requirements to stop allocating frequencies for the 800MHz analog cluster system, for better running analog cluster network, in principle, can continue to use December 31, 2005. For 800MHz digital trunking communication system, we must make good use of frequency planning and strengthen centralized management. 518 documents, for the tepid cluster communications market, is not the bottom “plus” salary. Document 518 shows the administration’s direction for the development of digital trunked communications. Sensitive people may be aware: rapid infiltration in the digital