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

Telecommunications Management Network (TMN) - Security - Part 3: Security services - Authentication of users and entities in a TMN environment (Endorsement of the English version EN 301261-3 V 1.2.1 (1999-01) as German Standard)
Edition 1999-12

V interfaces at the digital Local Exchange (LE) - V5.2 interface for the support of Access Network (AN) - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 300347-2 V 2.1.3 (1999-12) as German standard)
Edition 2000-10

V interfaces at the digital Local Exchange (LE) - V5.1 interface for the support of Access Network (AN) - Part 7: Test Suite Structure and Test Purposes (TSS&TP) specification for the data link layer as German standard) (Endorsement of the English version ETS 300324-7:1999 as German standard)
Edition 2000-10

Telecommunications Management Network (TMN) - Q3 interface at the Access Network (AN) for fault and performance management of V5 interfaces and associated user ports - Part 1: Q3 interface specification (Endorsement of the English version EN 300378-1 V 1.2.1 (1999-10) as German standard)
Edition 2000-10

Telecommunications Management Network (TMN) - Q3 interface at the Local Exchange (LE) for fault and performance management of V5 interfaces and associated customer profiles - Part 1: Q3 interface specification (Endorsement of the English version EN 300379-1 V 1.2.1 (1999-10) as German standard)
Edition 2000-10

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 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 301060-4 V 1.1.4 (1999-08) as German standard)
Edition 2000-10

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 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 301060-6 V 1.1.4 (1999-11) as German standard)
Edition 2000-10

V interfaces at the digital Service Node (SN) - Interfaces at the VB5.1 reference point for the support of broadband or combined narrowband and broadband Access Networks (ANs) - Part 4: Abstract Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification (Endorsement of the English version EN 301005-4 V 1.1.2 (2000-05) as German Standard)
Edition 2000-10

V interfaces at the digital Local Exchange (LE) - V5.1 interface for the support of Access Network (AN) - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 300324-2 V 2.1.1 (2000-04) as German standard)
Edition 2001-09