ETSI TS 146 021-2016 Digital cellular telecommunications system (Phase 2+); Half rate speech; Substitution and muting of lost frames for half rate speech traffic channels (V13.0.0; 3GPP TS 46.021 version 13.0.0 Release 13)
2020ETSI TS 146 021-2020 Digital cellular telecommunications system (Phase 2+) (GSM); Half rate speech; Substitution and muting of lost frames for half rate speech traffic channels (V16.0.0; 3GPP TS 46.021 version 16.0.0 Release 16)
2017ETSI TS 146 021-2017 Digital cellular telecommunications system (Phase 2+) (GSM); Half rate speech; Substitution and muting of lost frames for half rate speech traffic channels (V14.0.0; 3GPP TS 46.021 version 14.0.0 Release 14)
2016ETSI TS 146 021-2016 Digital cellular telecommunications system (Phase 2+); Half rate speech; Substitution and muting of lost frames for half rate speech traffic channels (V13.0.0; 3GPP TS 46.021 version 13.0.0 Release 13)
2014ETSI TS 146 021-2014 Digital cellular telecommunications system (Phase 2+); Half rate speech; Substitution and muting of lost frames for half rate speech traffic channels (V12.0.0; 3GPP TS 46.021 version 12.0.0 Release 12)
2010ETSI TS 146 021-2010 Digital cellular telecommunications system (Phase 2+); Half rate speech; Substitution and muting of lost frames for half rate speech traffic channels V9.0.0; 3GPP TS 46.021 version 9.0.0 Release 9
2009ETSI TS 146 021-2009 Digital cellular telecommunications system (Phase 2+); Half rate speech; Substitution and muting of lost frames for half rate speech traffic channels V8.0.0; 3GPP TS 46.021 version 8.0.0 Release 8
2007ETSI TS 146 021-2007 Digital cellular telecommunications system (Phase 2+); Half rate speech; Substitution and muting of lost frames for half rate speech traffic channels V7.0.0;3GPP TS 46.021 version 7.0.0 Release 7
2004ETSI TS 146 021-2004 Digital cellular telecommunications system (Phase 2+); Half rate speech; Substitution and muting of lost frames for half rate speech traffic channels 3GPP TS 46.021 Version 6.0.0 Release 6
2002ETSI TS 146 021-2002 Digital Cellular Telecommunications System (Phase 2+); Half Rate Speech; Substitution and Muting of Lost Frames for Half Rate Speech Traffic Channels 3GPP TS 46.021 Version 5.0.0 Release 5
2001ETSI TS 146 021-2001 Digital Cellular Telecommunications System (Phase 2+); Half Rate Speech; Substitution and Muting of Lost Frames for Half Rate Speech Traffic Channels 3GPP TS 46.021 Version 4.0.0 Release 4