PN EN 300 392-12-21 : AUG 2012现行
TERRESTRIAL TRUNKED RADIO (TETRA) - VOICE PLUS DATA (V+D) - PART 12: SUPPLEMENTARY SERVICES STAGE 3 - SUB-PART 21: AMBIENCE LISTENING (AL)
出版：Polish Committee for Standardization
专家解读视频
基本信息
标准编号： PN EN 300 392-12-21 : AUG 2012
标准类别：Standard
出版单位：Polish Committee for Standardization
标准页数：0
标准简介
Specifies the signalling system protocols and switching functions needed to implement the service SS-AL described in stage 1 and stage 2.
等同采用的国际标准
EN 300 392-12-21 : 1.5.1 - Identical
