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) - Specification, functional models and information flows - Private User Mobility (PUM); Registration supplementary service (ISO/IEC 17875 (2000), modified) (Endorsement of the English version EN 301822 V 1.1.1 (2000-10) as German standard)
Edition 2001-06

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Completion of Calls on No Reply (CCNR) supplementary service - Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network (Endorsement of the English version EN 301065-6 V 1.3.1 (2002-04) as German Standard)
Edition 2002-12

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

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol - Generic functional protocol for the support of supplementary services at the "b" service entry point for Virtual Private Network (VPN) applications - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user (Endorsement of the English version EN 301061-4 V 1.1.4 (1999-10) as German standard)
Edition 2000-10

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol - Generic functional protocol for the support of supplementary services at the "b" service entry point for Virtual Private Network (VPN) applications - Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network (Endorsement of the English version EN 301061-6 V 1.1.4 (1999-10) as German standard)
Edition 2000-10

Private Integrated Services Network (PISN) - Specification, functional model and information flows - Advice of charge supplementary services [ISO/IEC 15049 (1997) modified] (Endorsement of the English version EN 301254 V1.2.1 (2003-06) as German standard)
Edition 2004-03

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Message waiting indication supplementary service (ISO/IEC 15506 (2003), modified) (Endorsement of the English version EN 301255 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Specification, functional models and information flows - Message waiting indication supplementary service (ISO/IEC 15505 (2003), modified) (Endorsement of the English version EN 301260 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Specification, functional model and information flows - Name identification supplementary services [ISO/IEC 13864 (1995) modified] (Endorsement of the English version EN 300237 V1.3.1 (2003-06) as German standard)
Edition 2004-03