OVE/ONORM EN 300392-12-4:2012被替代
Terrestrial Trunked Radio (Tetra) - Voice Plus Data (V+D) - Part 12: Supplementary Services Stage 3 - Sub-Part 4: Call Forwarding (Cf) (Etsi En 300392-12-4 V1.3.1 (2012-04))
出版：Osterreichisches Normungsinstitut
專家解讀視頻
