Integrated Services Digital Network (ISDN) - Call Hold (HOLD) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - 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 300141-6 V 1.3.4 (1999-11) as German Standard)
Edition 2000-05

Integrated Services Digital Network (ISDN) - User-to-User Signalling (UUS) 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 300286-2 V 1.2.4 (1998-06) as German Standard)
Edition 2000-05

Integrated Services Digital Network (ISDN) - User-to-User Signalling (UUS) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user (Endorsement of the English version EN 300286-3 V 1.2.4 (1998-06) as German Standard)
Edition 2000-05

Integrated Services Digital Network (ISDN) - Freephone (FPH) supplementary service - Digital Subcsriber Signalling System No. one (DSS1) protocol - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 300210-2 V 1.2.4 (1998-06) as German Standard)
Edition 2000-05

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 5: Test Suite Structure and Test Purposes (TSS&TP) specification for the network (Endorsement of the English version EN 300369-5 V 1.3.1 (2002-05) as German Standard)
Edition 2002-12

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol; Diversion supplementary services (ISO/IEC 13873 (1995), modified) - Part 1: Test Suite Structure and Test Purposes (TSS&TP) specification (Endorsement of the English version EN 301453-1 V 1.1.2 (2000-11) as German standard)
Edition 2001-05

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol; Call offer supplementary service - Part 2: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification (Endorsement of the English version EN 301491-2 V 1.2.1 (2002-01) as German Standard)
Edition 2002-11

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol; Call offer supplement service - Part 1: Test Suite structure and Test Purposes (TSS&TP) (Endorsement of the English version EN 301491-1 V 1.1.2 (2000-11) as German standard)
Edition 2001-05

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol; Advice of Charge (AoC) supplementary services (ISO/IEC 15049 (1997), modified) - Part 1: Test Suite Structure and Test Purposes (TSS&TP) specification (Endorsement of the English version EN 301483-1 V 1.2.2 (2000-09) as German standard)
Edition 2001-05