Trans-European Trunked Radio (TETRA) - Speech CODEC for full-rate traffic channel - Part 1: General description of speech functions; English version ETS 300395-1:1997
Terrestrial Trunked Radio (TETRA) - Speech codec for full-rate traffic channel - Part 1: General description of speech functions (Endorsement of the English version EN 300395-1 V1.2.1 (2005-01) as German standard)— 2 стр.