Digital cellular telecommunications system (Phase 2+) - Adaptive Multi-Rate (AMR) speech transcoding (GSM 06.90 version 7.2.1 Release 1998) (Endorsement of the English version EN 301704 V7.2.1 (2000-04) as German standard)
Edition 2004-03

Digital cellular telecommunications system (Phase 2) - Enhanced Full Rate (EFR) speech transcoding (GSM 06.60 version 4.1.1) (Endorsement of the English version EN 301245 V4.1.1 (2000-08) as German standard)
Edition 2004-12

Digital cellular telecommunications system (Phase 2) - Half rate speech - Part 2: Half rate speech transcoding (Endorsement of the English version ETS 300581-2:1998-05 as German standard)
Edition 2001-04

Road vehicles - Ergonomic aspects of transport information and control systems - Specifications for in-vehicle auditory presentation (ISO 15006:2011); German version EN ISO 15006:2011
Edition 2012-04

Digital cellular telecommunications system (Phase 2) - Half rate speech - Part 8: Test sequences for the GSM half rate speech codec (Endorsement of the English version ETS 300581-8:1998-04 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Test sequences for the GSM Enhanced Full Rate (EFR) speech codec (GSM 06.54 version 4.0.1) (Endorsement of the English version EN 301250 V 4.0.1 (1998-09) as German standard)
Edition 2003-11

Digital cellular telecommunications system (Phase 2+) - Adaptive Multi Rate (AMR) speech - ANSI-C code for the AMR speech codec (GSM 06.73 version 7.4.1 Release 1998) (Endorsement of the English version EN 301712 V7.4.1 (2000-09) as German standard)
Edition 2006-01

Digital cellular telecommunications system (Phase 2) - ANSI-C code for the GSM Enhanced Full Rate (EFR) speech codec (GSM 06.53 version 4.0.1) (Endorsement of the English version EN 301244 V 4.0.1 (1998-01) as German standard)
Edition 2003-11

Digital cellular telecommunications system (Phase 2) - Substitution and muting of lost frames for Enhanced Full Rate (EFR) speech traffic channels (GSM 06.61 version 4.0.1) (Endorsement of the English version EN 301246 V 4.0.1 (1997-12) as German standard)
Edition 2003-11

Digital cellular telecommunications system (Phase 2+) (GSM) - Test sequences for the Adaptive Multi-Rate (AMR) speech codec (GSM 06.74 version 7.0.3 Release 1998) (Endorsement of the English version EN 301713 V 7.0.3 (2000-10) as German standard)
Edition 2003-08