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

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 3: Test Suite Structure and Test Purposes (TSS&TP) specification (Endorsement of the English version EN 301005-3 V 1.1.2 (2000-05) as German Standard)
Edition 2000-10

V interfaces at the digital Local Exchange (LE) - V5.2 interface for the support of Access Network (AN) - Part 8: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the data link layer (Endorsement of the English version EN 300347-8  V 2.1.2 (2000-06) as German standard)
Edition 2001-05

V interfaces at the digital Local Exchange (LE) - V5.2 interface for the support of Access Network (AN) - Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network layer (LE side) (Endorsement of the English version EN 300347-6 V 3.1.1 (2001-03) as German Standard)
Edition 2001-12

V interfaces at the digital Local Exchange (LE) - V5.2 interface for the support of Access Network (AN) - Part 5: Test Suite Structure and Test Purposes (TSS&TP) specification for the network layer (LE side) (Endorsement of the English version EN 300347-5 V 3.1.1 (2001-03) as German standard)
Edition 2001-12

V interfaces at the digital Local Exchange (LE) - V5.2 interface for the support of Access Network (AN) - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network layer (AN side) (Endorsement of the English version EN 300347-4 V 3.1.1 (2001-03) as German Standard)
Edition 2001-12

V interfaces at the digital Local Exchange (LE) - V5.2 interface for the support of Access Network (AN) - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the network layer (AN side) (Endorsement of the English version EN 300347-3 V 3.1.1 (2001-03) as German standard)
Edition 2001-12

V interfaces at the digital Local Exchange (LE) - V5.1 interface for the support of Access Network (AN) - Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network layer (LE side) (Endorsement of the English version EN 300324-6 V 3.1.1 (2001-03) as German Standard)
Edition 2001-12

V-interfaces at the digital Local Exchange (LE) - V5.1 interface for the support of Access Network (AN) - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network layer (AN side) (Endorsement of the English version EN 300324-4 V 3.1.1 (2001-03) as German Standard)
Edition 2001-12

Integrated Services Digital Network (ISDN) - Narrowband Multi-service Delivery System (NMDS) - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the data link layer (NTN side) (Endorsement of the English version EN 301141-3 V 1.1.1 (2002-02) as German Standard)
Edition 2002-11