China 'GB/T 34992-2017
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 34992-2017
12.5kHz TDMA channel based professional digital trunking communication system—Technical specifications for call control layer of air interface 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
Issued Date:2017-11-01
Implemented Date:2018-02-01
Issued by:
The Standardization Administration of the People's Republic of China
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