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ÖNORM ETS 300392-11-24:2000-12

Действует
Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2 - Sub-part 24: Call Retention (CRT)
ICS
33.070.10 Terrestrial Trunked Radio (TETRA) / Стандарт на мобильную связь (TETRA)