Home / Standards / GB/T 38311-2019 GB/T 38311-2019 Active Communication protocols and interfaces of public security and protection system in urban rail transit 城市轨道交通安全防范通信协议与接口 Standard Type GBT ICS 93.080 CCS Q84 Status 现行 Issue Date 2019-12-10 Implementation 2020-07-01 Responsible Dept 住房城乡建设部 Drafting Unit N/A