Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Three-Party (3PTY) 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 300188-4 V 1.4.1 (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 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 301061-4 V 1.1.4 (1999-10) as German standard)
Edition 2000-10

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 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 301061-6 V 1.1.4 (1999-10) as German standard)
Edition 2000-10

Broadband Integrated Services Digital Network (B-ISDN) and Broadband Private Integrated Services Network (B-PISN) - Digital Subscriber Signalling System No. two (DSS2); Broadband Inter-Exchange Signalling (B-QSIG) and Signalling System No. 7 (SS7); Prenegotiation - Part 1: Protocol specification (Endorsement of the English version EN 302091-1 V 1.1.3 (1999-11) as German standard)
Edition 2000-10

Broadband Integrated Services Digital Network (B-ISDN) and Broadband Private Integrated Services Network (B-PISN) - Digital Subscriber Signalling System No. two (DSS2); Broadband Inter-Exchange Signalling (B-QSIG) and Signalling System No. 7 (SS7); Prenegotiation - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 302091-2 V 1.1.3 (1999-11) as German standard)
Edition 2000-10

Broadband Integrated Services Digital Network (B-ISDN) and Broadband Private Integrated Services Network (B-PISN) - Digital Subscriber Signalling System No. two (DSS2); Broadband Inter-Exchange Signalling (B-QSIG) and Signalling System No. 7 (SS7); call control in a separated call and bearer control environment - Part 1: Protocol specification (Endorsement of the English version EN 302092-1 V 1.2.2 (1999-11) as German standard)
Edition 2000-10

Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; Negotiation during call/connection establishment phase - Part 5: Test Suite Structure and Test Purposes (TSS&TP) specification for the network (Endorsement of the English version EN 301067-5 V 1.2.1 (2000-09) as German Standard)
Edition 2001-09

Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; Negotiation during call/connection establishment phase - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user (Endorsement of the English version EN 301067-3 V 1.2.1 (2000-09) as German Standard)
Edition 2001-09

Integrated Services Digital Network (ISDN) - Advice of Charge (AOC) 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 300182-5 V 1.4.1 (2001-06) as German Standard)
Edition 2002-03

Integrated Services Digital Network (ISDN) - Generic functional protocol for the support of supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification (Endorsement of the English version EN 300196-1 V 1.3.2 (2001-06) as German Standard)
Edition 2002-03