Private Integrated Services Network (PISN) - Specification, functional model and information flows - Do not disturb and do not disturb override supplementary services [ISO/IEC 14842 (1996) modified] (Endorsement of the English version EN 300363 V1.3.1 (2003-06) as German standard)
Edition 2004-03

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 model and information flows - Call completion supplementary services [ISO/IEC 13866 (1995) modified] (Endorsement of the English version EN 300365 V1.3.1 (2003-06) as German standard)
Edition 2004-03

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Call completion supplementary services (ISO/IEC 13870 (2003), modified) (Endorsement of the English version EN 300366 V1.3.1 (2004-01) as German standard)
Edition 2004-12

Integrated Services Digital Network (ISDN) - Explicit Call Transfer (ECT) supplementary service - Service description (Endorsement of the English version EN 300367 V 1.2.1 (1998-10) as German standard)
Edition 2000-09

Integrated Services Digital Network (ISDN) - Explicit Call Transfer (ECT) supplementary service - Functional capabilities and information flows (Endorsement of the English version EN 300368 V 1.2.2 (1998-12) as German standard)
Edition 2000-12

Integrated Services Digital Network (ISDN) - Explicit Call Transfer (ECT) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification (Endorsement of the English version EN 300369-1 V 1.2.4 (1998-10) as German standard)
Edition 2000-10

Integrated Services Digital Network (ISDN) - Explicit Call Transfer (ECT) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 300369-2 V 1.2.4 (1998-10) as German standard)
Edition 2000-10

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Explicit Call Transfer (ECT) supplementary service - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user (Endorsement of the English version EN 300369-3 V 1.3.1 (2002-05) as German Standard)
Edition 2002-12

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Explicit Call Transfer (ECT) supplementary service - 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 300369-4 V 1.3.1 (2002-05) as German Standard)
Edition 2002-12