Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 9: General requirements for supplementary services (ETSI EN 300392-9 V1.5.1 (2012-04))
Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 9: General requirements for supplementary services (ETSI EN 300392-9 V1.5.1 (2012-04))