European digital cellular telecommunications system (phase 2) - MultiParty (MPTY) supplementary services, stage 3; English version ETS 300568:1995
Edition 1995-08

European digital cellular telecommunications system (Phase 2) - Multi Party (MPTY) supplementary services - Stage 2; English version ETS 300545:1995
Edition 1995-09

Digital cellular telecommunications system (Phase 2+) - Multi Party (MPTY) supplementary services - Stage 3 (GSM 04.84 version 7.0.1 Release 1998)
Edition 2000-04-01

European digital cellular telecommunications system (Phase 2) - Man-Machine Interface (MMI) of the Mobile Station (MS); English version ETS 300511:1995
Edition 1995-12

ASN.1 library definition - Version 1.1; English version ETS 300655:1997
Edition 1998-05

Information technology - Security techniques - Privacy architecture framework (ISO/IEC 29101:2018); German version EN ISO/IEC 29101:2021
Edition 2022-04

Human Factors (HF) - Minimum Man-Machine Interface (MMI) to public network based supplementary services; English version ETS 300738:1997
Edition 1998-04

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

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol, Generic functional protocol for the support of supplementary services - Part 2: Abstract Test Suite (ATS) specification; English version ETS 300806-2:1998
Edition 1998-12

European digital cellular telecommunications system (Phase 2) - Operator determined barring; English version ETS 300513:1994
Edition 1995-01