Digital cellular telecommunications system (Phase 2) - General on supplementary services (Endorsement of the English version ETS 300503:1996-05 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Types of Mobile Stations (MS) (Endorsement of the English version ETS 300504:1998-01 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Types of Mobile Stations (MS) (Endorsement of the English version ETS 300505:1998-01 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Security aspects (Endorsement of the English version ETS 300506:2000-08 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Service accessibility (Endorsement of the English version ETS 300507:1996-09 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Line identification supplementary services - Stage 1 (Endorsement of the English version ETS 300514:1998-06 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Call Forwarding (CF) supplementary services - Stage 1 (Endorsement of the English version ETS 300515:1996-05 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Multi Party (MPTY) supplementary services - Stage 1 (Endorsement of the English version ETS 300517:1996-05 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Closed User Group (CUG) supplementary services - Stage 1 (Endorsement of the English version ETS 300518:1996-05 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Advice of Charge (AoC) supplementary services - Stage 1 (Endorsement of the English version ETS 300519:1996-05 as German standard)
Edition 2001-04