DIN EN 300392-12-4-2011 地面集群无线电(TETRA)-声音加数据(V+D)-第12部分:补充业务阶段3.第4字部分:电话转接(CF)(英文版本EN 300392-12-4 V1.2.1 (2010-07)的核准本作为德国标准)
Terrestrial Trunked Radio (TETRA) - Voice plus Date (V+D) - Part 12: Supplementary services stage 3 - Sup-part 4: Call Forwarding (CF) (Endorsement of the English version EN 300392-12-4 V1.2.1 (2010-07) as German standard)