DIN EN 300392-12-12:2001-08
Отменен
Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 3; Sub-part 12-12: Call hold (CH) (Endorsement of the English version EN 300392-12-12 V 1.1.1 (2001-01) as German standard)
— 1 стр.
