Digital cellular telecommunications system (Phase 2+) (GSM) - Support of Mobile Number Portability (MNP) - Service description; Stage 1 (GSM 02.66 version 7.0.2 Release 1998) (Endorsement of the English version EN 301715 V 7.0.2 (1999-12) as German standard)
Edition 2003-08

Private Integrated Services Network (PISN) - Mapping functions for the employment of 64 kbit/s circuit mode connections with 16 kbit/s sub-multiplexing (ISO/IEC 17310 (2002), modified) (Endorsement of the English version EN 301039 V 1.2.1 (2002-09) as German standard)
Edition 2003-12

Integrated Services Digital Network (ISDN) - Application of the ISDN User Part (ISUP) of ITU-T Signalling System No. 7 (SS7) for international ISDN interconnections (ISUP version 1); Amendment 1: International Emergency Preference Scheme (IEPS) service [ITU-T Recommendation Q.767 Amendment 1 (2002), modified] (Endorsement of the English version EN 300121 V1.2.1 (2003-07) as German standard)
Edition 2004-07

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Call offer supplementary service (ISO/IEC 14843 (2003), modified) (Endorsement of the English version EN 300362 V1.3.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Do not disturb and do not disturb override supplementary services (ISO/IEC 14844 (2003), modified) (Endorsement of the English version EN 300364 V1.3.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Call diversion supplementary service (ISO/IEC 13873 (2003), modified) (Endorsement of the English version EN 300257 V1.3.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Call transfer supplementary service (ISO/IEC 13869 (2003), modified) (Endorsement of the English version EN 300261 V1.3.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Specification, functional models and information flows - Call interception Additional Network Feature (ANF) (ISO/IEC 15053 (2003), modified) (Endorsement of the English version EN 301256 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Call intrusion supplementary service (ISO/IEC 14846 (2003), modified) (Endorsement of the English version EN 300426 V1.3.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Specification, functional models and information flows - Recall supplementary service (ISO/IEC 15051 (2003), modified) (Endorsement of the English version EN 301257 V1.2.1 (2004-01) as German standard)
Edition 2004-12