Access and Terminals (AT) - 2048 kbit/s digital unstructured leased line (D2048U) - Terminal equipment interface (Endorsement of the English version EN 300248 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

Digital cellular telecommunications system (Phase 2+) - Terminal Adaptation Functions (TAF) for services using synchronous bearer capabilities (Endorsement of the English version ETS 300915:1998-07 as German standard)
Edition 2001-06

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Wireless terminal call handling Additional Network Feature (ANF) (ISO/IEC 15431 (2003), modified) (Endorsement of the English version EN 301827 V1.1.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Specification, functional model and information flows - Wireless terminal call handling additional network features [ISO/IEC 15430 (1999) modified] (Endorsement of the English version EN 301826 V1.1.1 (2003-06) as German standard)
Edition 2004-03

Private Integrated Services Network (PISN) - Specification, functional model and information flows - Wireless terminal authentication supplementary services [ISO/IEC 15432 (1999) modified] (Endorsement of the English version EN 301828 V1.1.1 (2003-06) as German standard)
Edition 2004-03

Access and Terminal (AT) - 64 kbit/s digital unrestricted leased line with octet integrity (D64U) - Terminal equipment interface (Endorsement of the English version EN 300290 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

Access and Terminals (AT) - Ordinary and special quality voice bandwidth 2-wire analogue leased lines (A2O and A2S) - Terminal equipment interface (Endorsement of the English version EN 300450 V 1.2.1 (2001-07) as German Standard)
Edition 2002-01

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Wireless terminal authentication supplementary service (ISO/IEC 15433 (2003), modified) (Endorsement of the English version EN 301829 V1.1.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Specification, functional model and information flows - Wireless terminal location registration supplementary service and wireless terminal information exchange additional network feature [ISO/IEC 15428 (1999) modified] (Endorsement of the English version EN 301824 V1.1.1 (2003-06) as German standard)
Edition 2004-03

Digital Enhanced Cordless Telecommunications (DECT) - Global System for Mobile communications(GSM) - Attachment requirements for DECT/GSM dual-mode terminal equipment (Endorsement of the English version EN 301439 V 1.1.1 (1999-03) as German standard)
Edition 2000-07