Integrated Services Digital Network (ISDN) - Signalling System No. 7; Interworking between ISDN User Part (ISUP) version 2 and Digital Subscriber Signalling System No. one (DSS1) - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification (Endorsement of the English version EN 300899-4 V 1.1.1 (2002-04) as German Standard)
Edition 2003-01

Integrated Services Digital Network (ISDN) - Outgoing Call Barring (OCB) supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification [Endorsement of the English version EN 301001-1 V 1.2.2 (1998-08) as German standard]
Edition 1999-11

Integrated Services Digital Network (ISDN) - Outgoing Call Barring (OCB) supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification [Endorsement of the English version EN 301001-2 V 1.2.2 (1998-08) as German standard]
Edition 1999-11

Integrated Services Digital Network (ISDN) - Outgoing Call Bearing (OCB) 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 301001-3 V 1.1.3 (1998-10) as German standard]
Edition 1999-11

Integrated Services Digital Network (ISDN) - Outgoing Call Bearing (OCB) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification of the user (Endorsement of the English version EN 301001-4 V 1.1.4 (1999-11) as German standard)
Edition 2000-10

Integrated Services Digital Network (ISDN) - Outgoing Call Bearing (OCB) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 5: Test Suite Structure and Test Purposes (TSS&TP) specification for the network [Endorsement of the English version EN 301001-5 V 1.1.3 (1998-10) as German standard]
Edition 1999-11

Integrated Services Digital Network (ISDN) - Outgoing Call Bearing (OCB) 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 of the network (Endorsement of the English version EN 301001-6 V 1.1.4 (1999-11) as German standard)
Edition 2000-10

Integrated Services Digital Network (ISDN) - Security tools (SET) procedures; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification (Endorsement of the English version EN 301002-1 V 1.3.1 (2001-06) as German Standard)
Edition 2002-11

Integrated Services Digital Network (ISDN) - Security tools (SET) procedures; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 301002-2 V 1.3.1 (2001-06) as German Standard)
Edition 2002-11

Integrated Services Digital Network (ISDN) - Security tools (SET) procedures; 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 301002-3 V 1.2.1 (2001-11) as German Standard)
Edition 2002-11