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

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Call interception Additional Network Feature (ANF) (ISO/IEC 15054 (2003), modified) (Endorsement of the English version EN 301265 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Call priority interruption and call priority interruption protection supplementary services (ISO/IEC 15992 (2003), modified) (Endorsement of the English version EN 301656 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Advice of charge supplementary services (ISO/IEC 15050 (2003), modified) (Endorsement of the English version EN 301264 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Private User Mobility (PUM) - Registration supplementary service (ISO/IEC 17876 (2003), modified) (Endorsement of the English version EN 301821 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Common information Additional Network Feature (ANF) (ISO/IEC 15772 (2003), modified) (Endorsement of the English version EN 301820 V1.2.1 (2004-01) as German standard)
Edition 2004-12