DIN EN 300392-12-10-2004 地面中继无线电系统(TETRA).声音加数据.第12部分:补充业务阶段3.第10分部分:优选呼叫
Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3 - Sub-part 10: Priority Call (PC) (Endorsement of the English version EN 300392-12-10 V1.2.1 (2004-02) as German standard)