Integrated Services Digital Network (ISDN) - Outgoing Call Barring-User Controlled (OCB-UC) supplementary service - Service description (Endorsement of the English version EN 301084 V 2.1.1 (2000-07) as German standard)
Edition 2002-07

Digital cellular telecommunications system (Phase 2+) - General Packet Radio Service (GPRS) - Service description - Stage 1 (GSM 02.60 version 6.3.1 Release 1997) (Endorsement of the English version EN 301113 V6.3.1 (2000-11) as German standard)
Edition 2005-04

Integrated Services Digital Network (ISDN) - Teleaction teleservice - Service description (Endorsement of the English version EN 301131 V 1.1.1 (1999-01) as German standard)
Edition 2000-09

Integrated Services Digital Network (ISDN) - Selective Call Forwarding (SCF) supplementary services (unconditional, busy and no reply) - Service description (Endorsement of the English version EN 301133 V 1.1.1 (1998,10) as German standard)
Edition 2000-09

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

Cordless Terminal Mobility (CTM) - Phase 1 - Service description (Endorsement of the English version EN 301175 V 1.1.1 (1998-08) as German Standard)
Edition 2000-09

Cordless Terminal Mobility (CTM) - Phase 2 - Service description (Endorsement of the English version EN 301273 V 1.1.3 (2000-01) as German standard)
Edition 2000-10

Integrated Services Digital Network (ISDN) - Line Hunting (LH) supplementary service - Service description (Endorsement of the English version EN 301479 V 1.1.2 (2000-08) as German Standard)
Edition 2001-10

Integrated Services Digital Network (ISDN) - Remote Control (RC) service - Service description (Endorsement of the English version EN 301691 V 1.1.1 (2001-02) as German Standard)
Edition 2001-10

Cordless Terminal Mobility (CTM) - Phase 2+ Feature Package 1 (FP1); Circuit-switched data - Service description (Endorsement of the English version EN 301692 V 2.0.2 (2000-05) as German standard)
Edition 2000-12