GB/T 34991-2017基于12.5kHz信道的时分多址(TDMA)专用数字集群通信系统空中接口物理层及数据链路层技术规范国家标准
英文:12.5kHz TDMA channel based professional digital trunking communication system—Technical specifications for physical l...
英文:12.5kHz TDMA channel based professional digital trunking communication system—Technical specifications for physical l...