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

Terminal Equipment (TE); international videotex interworking; english version ETS 300105:1991
Edition 1992-11

European digital cellular telecommunications system - Half rate speech - Part 3: Substitution and muting of lost frames for half rate speech traffic channels; English version ETS 300581-3:1995
Edition 1996-07

European digital cellular telecommunications system (Phase 2) - GSM Public Land Mobile Network (PLMN) connection types; English version ETS 300528:1994
Edition 1995-01

European digital cellular telecommunications system (Phase 2) - Mobile Station - Base Station System (MS-BSS) interface - Channel structures and access capabilities; English version ETS 300552:1994
Edition 1995-01

European digital cellular telecommunications system - Half rate speech - Part 4: Comfort noise aspects for the half rate speech traffic channel; English version ETS 300581-4:1995
Edition 1996-07

European digital cellular telecommunications system - Half rate speech - Part 5: Discontinuous transmission (DTX) for half rate speech traffic channels; English version ETS 300581-5:1995
Edition 1996-07

European digital cellular telecommunications system (Phase 2) - Part 4: Comfort noise aspects for full rate speech traffic channels; English version ETS 300580-4:1994
Edition 1995-01

European digital cellular telecommunications system - Half rate speech - Part 6: Voice Activity Detector (VAD) for half rate speech traffic channels; English version ETS 300581-6:1995
Edition 1996-07