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) - 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) - Functions related to Mobile Stations (MS) in idle mode (Endorsement of the English version ETS 300535:1996-09 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) - Technical realization of Short Message Service Cell Broadcast (SMSCB) (Endorsement of the English version ETS 300537:1996-05 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Handover procedures (Endorsement of the English version ETS 300527:1996-09 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) - Transmission planning aspects of the speech service in the GSM Public Land Mobile Network (PLMN) system (Endorsement of the English version ETS 300540:1999-07 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) - Call Forwarding (CF) supplementary services - Stage 2 (Endorsement of the English version ETS 300543:1997-01 as German standard)
Edition 2001-04