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

Private Integrated Services Network (PISN) - Specification, functional model and information flows - Advice of charge supplementary services [ISO/IEC 15049 (1997) modified] (Endorsement of the English version EN 301254 V1.2.1 (2003-06) as German standard)
Edition 2004-03

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Message waiting indication supplementary service (ISO/IEC 15506 (2003), modified) (Endorsement of the English version EN 301255 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Specification, functional models and information flows - Call interception Additional Network Feature (ANF) (ISO/IEC 15053 (2003), modified) (Endorsement of the English version EN 301256 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Specification, functional models and information flows - Recall supplementary service (ISO/IEC 15051 (2003), modified) (Endorsement of the English version EN 301257 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Recall supplementary service (ISO/IEC 15052 (2003), modified) (Endorsement of the English version EN 301258 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Private Integrated Network eXchange (PINX) clock synchronization (ISO/IEC 15507 (1997), modified) (Endorsement of the English version EN 301259 V 1.1.1 (1998-10) as German standard)
Edition 2000-03