Digital cellular telecommunications system (Phase 2) - Enhanced Full Rate (EFR) speech processing functions - General description (GSM 06.51 version 4.1.1) (Endorsement of the English version EN 301243 V4.1.1 (2000-11) as German standard)
Edition 2004-12

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) - 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) - 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) - Comfort noise aspects for Enhanced Full Rate (EFR) speech traffic channels (GSM 06.62 version 4.0.1) (Endorsement of the English version EN 301247 V 4.0.1 (1997-12) as German standard)
Edition 2003-11

Digital cellular telecommunications system (Phase 2) - Discontinuous Transmission (DTX) for Enhanced Full Rate (EFR) speech traffic channels (GSM 06.81 version 4.1.1) (Endorsement of the English version EN 301248 V4.1.1 (2000-04) as German standard)
Edition 2004-12

Digital cellular telecommunications system (Phase 2) - Voice Activity Detector (VAD) for Enhanced Full Rate (EFR) speech traffic channels (GSM 06.82 version 4.0.1) (Endorsement of the English version EN 301249 V 4.0.1 (1997-12) as German standard)
Edition 2003-11

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) - Fault management of the Base Station System (BSS) (GSM 12.11 version 4.2.1) (Endorsement of the English version EN 301251 V4.2.1 (1998-12) as German standard)
Edition 2004-12

Fixed radio systems - Point-to-multipoint equipment - Frequency Hopping Code Division Multiple Access (FH-CDMA); Point-to-multipoint digital radio systems in frequency bands in the range 3 GHz to 11 GHz (Endorsement of the English version EN 301253 V 1.2.1 (2001-02) as German Standard)
Edition 2001-10