DIN ETS 300392-12-13:2000-12
Отменен
Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3; Sub-part 13: Call Completion to Busy Subscriber (CCBS) (Endorsement of the English version ETS 300392-12-13:2000 as German standard)
