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

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 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 300324-8 V 2.1.1. (2000-05) 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 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 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 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

Integrated Services Digital Network (ISDN) - Signalling System No. 7 (SS7) - ISDN User Part (ISUP) version 4 for the international interface - Part 33: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for basic services (Endorsement of the English version EN 300356-33 V4.1.1 (2003-07) as German standard)
Edition 2004-07

Integrated Services Digital Network (ISDN); Signalling System No. 7 (SS7) - ISDN User Part (ISUP) version 3 for the International interface - Part 36: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for supplementary services (Endorsement of the English version EN 300356-36 V 3.3.1 (2003-01) as German standard)
Edition 2003-11

Integrated Services Digital Network (ISDN) - Completion of Calls to Busy Subscriber (CCBS) 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 for the user (Endorsement of the English version EN 300359-4 V 1.4.1 (2001-11) as German Standard)
Edition 2002-11

Integrated Services Digital Network (ISDN) - Completion of Calls to Busy Subscriber (CCBS) 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 for the network (Endorsement of the English version EN 300359-6 V 1.4.1 (2001-11) as German Standard)
Edition 2002-11