Integrated Services Digital Network (ISDN) - Conference call, add-on (CONF) supplementary service - Service description (Endorsement of the English version ETS 300183:1992/A1:1998 as German standard)
Edition 2000-04

Integrated Services Digital Network (ISDN) - Explicit Call Transfer (ECT) supplementary service - Service description (Endorsement of the English version EN 300367 V 1.2.1 (1998-10) as German standard)
Edition 2000-09

Integrated Services Digital Network (ISDN) - Narrowband Multi-service Delivery System (NMDS) - Part 1: NMDS interface specification (Endorsement of the English version EN 301141-1 V 2.1.1 (2000-11) as German standard)
Edition 2001-05

Telecommunications Management Network (TMN) - Security - Part 3: Security services - Authentication of users and entities in a TMN environment (Endorsement of the English version EN 301261-3 V 1.2.1 (1999-01) as German Standard)
Edition 1999-12

Corporate telecommunication Networks (CN) - Signalling interworking between QSIG and H.323 - Basic services (Endorsement of ISO/IEC 23289 (2002), modified) (Endorsement of the English version EN 302036 V 1.1.1 (2003-05) as German standard)
Edition 2003-12

Digital cellular telecommunications system (Phase 2+) - Enhanced Multi-Level Precedence and Pre-emption service (eMLPP) - Stage 2 (Endorsement of the English version ETS 300932:1997-05 as German standard)
Edition 2001-06

Digital cellular telecommunications system (Phase 2) - Point-to-Point (PP) Short Message Service (SMS) support on mobile radio interface (Endorsement of the English version ETS 300559:1996-09 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2+) - Point-to-Point (PP) Short Message Service (SMS) support on mobile radio interface (Endorsement of the English version ETS 300942:1997-09 as German standard)
Edition 2001-06

Digital broadcasting systems for television, sound and data services - Framing structure, channel coding and modulation for Multipoint Video Distribution Systems (MVDS) at 10 GHz and above (Endorsement of the English version EN 300748 V 1.1.2 (1997-08) as German standard)
Edition 2000-04

Integrated Services Digital Network (ISDN) - Message Waiting Indication (MWI) supplementary service - Service description (Endorsement of the English version EN 300650 V 1.2.1 (2001-05) as German standard)
Edition 2002-07