Electronic Signatures and Infrastructures (ESI) - Registered Electronic Mail (REM) Services - Part 4: Interoperability profiles (Endorsement of the English version EN 319 532-4 V1.2.1 (2022-05) as a German standard)
Edition 2022-11

Integrated Services Digital Network (ISDN) - Completion of Calls on No Reply (CCNR) supplementary service - Service description (Endorsement of the English version EN 301134 V 1.1.1 (1998-10) as German standard)
Edition 2000-09

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3 - Sub-part 16: Pre-emptive Priority Call (PPC) (Endorsement of the English version EN 300392-12-16 V1.2.1 (2004-09) as German standard)
Edition 2005-04

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2 - Sub-part 16: Pre-emptive Priority Call (PPC) (Endorsement of the English version EN 300392-11-16 V1.2.1 (2004-09) as German standard)
Edition 2005-04

Integrated Services Digital Network (ISDN) - Outgoing Call Barring-Fixed (OCB-F) supplementary service - Service description (Endorsement of the English version EN 301082 V 2.1.1 (2000-07) as German standard)
Edition 2002-07

Integrated Services Digital Network (ISDN) - Connected Line Identification Presentation (COLP) supplementary service - Service description (Endorsement of the English version EN 300094 V 2.1.1 (2000-06) as German standard)
Edition 2000-12

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 10: Supplementary services stage 1 - Sub-part 8: Area Selection (AS) (Endorsement of the English version EN 300392-10-8 V1.2.1 (2004-02) as German standard)
Edition 2004-12

Digital cellular telecommunications system (Phase 2) - Unstructured Supplementary Service Data (USSD) - Stage 1 (Endorsement of the English version ETS 300625:1997-09 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Technical realisation of supplementary services (Endorsement of the English version ETS 300529:1996-11 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2+) - Call Barring (CB) supplementary services - Stage 3 (Endorsement of the English version ETS 300956:1998-07 as German standard)
Edition 2001-06