标准号:EN 300 970-1999
中文标准名称:EN 300 970-1999
英文标准名称:Digital Cellular Telecommunications System (Phase 2+); Half Rate Speech; Substitution and Muting of Lost Frames for Half Rate Speech Traffic Channels (GSM 06.21 Version 7.0.0 Release 1998)
发布日期:1999-08-01
实施日期:2014-04-24