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)
2018TS 146 021-2018 Digital cellular telecommunications system (Phase 2+) (GSM); Half rate speech; Substitution and muting of lost frames for half rate speech traffic channels (V15.0.0; 3GPP TS 46.021 version 15.0.0 Release 15)
2017TS 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)
2016TS 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)
2014TS 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)
2012TS 146 021-2012 Digital cellular telecommunications system (Phase 2+); Half rate speech; Substitution and muting of lost frames for half rate speech traffic channels (V11.0.0; 3GPP TS 46.021 version 11.0.0 Release 11)
2011TS 146 021-2011 Digital cellular telecommunications system (Phase 2+); Half rate speech; Substitution and muting of lost frames for half rate speech traffic channels (V10.0.0; 3GPP TS 46.021 version 10.0.0 Release 10)
2010TS 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)
2009TS 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)
2007TS 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)
2004TS 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)
2002TS 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)
2001TS 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)