Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Calling Line Identification Restriction (CLIR) 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 300093-4 V 1.3.1 (2002-04) as German Standard)
Edition 2002-12

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 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the use (Endorsement of the English version EN 301061-3 V 1.1.3 (1998-10) as German standard)
Edition 2000-04

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 5: Test Suite Structure and Test Purposes (TSS&TP) specification for the network (Endorsement of the English version EN 301061-5 V 1.1.3 (1998-10) as German standard)
Edition 2000-04

Integrated Services Digital Network (ISDN); User-to-User Signalling (UUS) 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 300286-5 V 1.4.1 (2003-01) as German standard)
Edition 2003-11

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Teleaction service - Part 1: Protocol specification (Endorsement of the English version EN 301145-1 V 1.1.4 (1999-03) as German Standard)
Edition 2001-09

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

Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; ATM traffic descriptor modification with negotiation by the connection owner - Part 1: Protocol specification [ITU-T Recommendation Q.2963.3, modified] (Endorsement of the English version EN 301486-1 V 1.1.3 (2000-04) as German standard)
Edition 2001-02

Integrated Services Digital Network (ISDN) - Calling Line Identification Presentation (CLIP) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification (Endorsement of the English version EN 300092-1 V 2.1.1 (2001-02) as German standard)
Edition 2001-09

Integrated Services Digital Network (ISDN) - Definition and usage of cause and location in Digital Subscriber Signalling System No. one (DSS1) and Signalling System No. 7 (SS7) ISDN User Part (ISUP) (ITU-T Recommendation Q.850 (1998) with addendum, modified) (Endorsement of the English version EN 300485 V 1.3.1 (2001-04) as German standard)
Edition 2001-12

Integrated Services Digital Network (ISDN) - Supplementary service interactions; 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 300195-5 V 1.3.3 (2000-05) as German standard)
Edition 2000-10