DIN EN 300392-12-4-2017 地面集群无线电(TETRA).语音加数据(V+D).第12部分:补充业务阶段3.子部分4:呼叫转接(CF)(英文版本EN 300392-12-4 V1.4.1 (2016-07)的核准本作为德国标准)
Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3 - Sub-part 4: Call Forwarding (CF) (Endorsement of the English version EN 300 392-12-4 V1.4.1 (2016-07) as German standard)