ETSI TR 101 294-2000 数字蜂窝通信系统(第2+阶段).对半速/全速/增强型全速率(HR/FR/EFR)语音编解码器的单一,顺次和非顺次操作的互用性的主观测试GSM 06.85(版本8.0.0,1999年发布)
Digital Cellular Telecommunications System (Phase 2+); Subjective Tests on the Interoperability of the Half Rate/ Full Rate/Enhanced Full Rate (HR/FR/EFR) Speech Codecs, Single, Tandem and Tandem Free Operation (GSM 06.85 Version 8.0.0 Release 1999)