DIN EN 300395-4-2006 地面中继无线电(TETRA).全速话务信道的语音编译码器.第4部分:编译码器性能试验
Terrestrial Trunked Radio (TETRA) - Speech codec for full-rate traffic channel - Part 4: Codec conformance testing (Endorsement of the English version EN 300395-4 V1.3.1 (2005-06) as German standard)