Multimedia Terminals and Applications (MTA) - Programmable Communication Interface (PCI) for file transfer over Integrated Services Digital Network (ISDN) (Endorsement of the English version ETS 300835:1998 as German)
Edition 2001-04

Integrated Services Digital Network (ISDN); Calling Line Identification Restriction (CLIR) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification (Endorsement of the English version EN 300093-1 V 1.2.4 (1998-06) as German standard)
Edition 1999-12

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Basic call control; enhancement at the "b" service entry point for Virtual Private Network (VPN) applications - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 301060-2 V 1.1.3 (1998-11) as German standard)
Edition 2000-04

Integrated Services Digital Network (ISDN) - Completion of Calls on No Reply (CCNR) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification (Endorsement of the English version EN 301065-1 V 1.2.2 (1998-10) as German standard)
Edition 2000-04

Integrated Services Digital Network (ISDN) - Completion of Calls on No Reply (CCNR) 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 301065-3 V 1.1.3 (1998-10) as German standard)
Edition 2000-04

Integrated Services Digital Network (ISDN); Connected Line Identification Presentation (COLP) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification (Endorsement of the English version EN 300097-1 V 1.2.4 (1998-06) as German Standard)
Edition 1999-12

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 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) - Digital Subscriber Signalling System No. one (DSS1) protocol; Basic call control; enhancement 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 301060-5 V 1.1.3 (1998-11) as German standard)
Edition 2000-04

Integrated Services Digital Network (ISDN); Connected Line Identification Presentation (COLP) 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 300097-2 V 1.2.4 (1998-06) as German Standard)
Edition 1999-12