GB/T 34992-2017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呼叫控制层技术规范国家标准
英文:12.5kHz TDMA channel based professional digital trunking communication system—Technical specifications for call contr...
英文:12.5kHz TDMA channel based professional digital trunking communication system—Technical specifications for call contr...
英文:12.5kHz TDMA channel based professional digital trunking communication system—Technical specifications for physical l...
英文:General technical requirements and test method of portable broadband emergency communication system GB/T 40686-2021介绍...