Digital cellular telecommunications system (Phase 2) - Security related network functions (Endorsement of the English version ETS 300534:1997-08 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Technical realization of the Short Message Service (SMS) Point-to-Point (PP) (Endorsement of the English version ETS 300536:1996-10 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Organization of subscriber data (Endorsement of the English version ETS 300526:1996-10 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Line identification supplementary services - Stage 2 (Endorsement of the English version ETS 300542:1999-01 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Mobile radio interface layer 3 - Supplementary services specification; General aspects (Endorsement of the English version ETS 300558:1996-08 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Closed User Group (CUG) supplementary services - Stage 3 (Endorsement of the English version ETS 300569:1996-11 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 300559:1996-09 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Performance requirements on the mobile radio interface (Endorsement of the English version ETS 300561:1996-05 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Radio Link Protocol (RLP) for data and telematic services on the Mobile Station-Base Station System (MS-BSS) interface and the Base Station System-Mobile-services Switching Centre (BSS-MSC) interface (Endorsement of the English version ETS 300563:1998-10 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Call Forwarding (CF) supplementary services - Stage 3 (Endorsement of the English version ETS 300566:1996-08 as German standard)
Edition 2001-04