Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control - Part 1: Protocol specification [ITU-T-Recommendation Q.931 (1993), modified] (Endorsement of the English version EN 300403-1 V 1.3.2 (1999-11) as German standard)
Edition 2000-10

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control - Part 2: Specification and Description language (SDL) diagrams (Endorsement of the English version EN 300403-2 V 1.3.1 (2000-11) as German standard)
Edition 2001-05

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1); Signalling network layer for circuit-mode basic call control - Part 3: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 300403-3 V 1.4.1 (2001-05) as German Standard)
Edition 2002-11

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control - Part 6: Test Suite Structure and Test Purposes (TSS&TP) specification for the network (Endorsement of the English version EN 300403-6 V 1.2.2 (2000-02) as German Standard)
Edition 2002-12

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control - Part 7: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network (Endorsement of the English version EN 300403-7 V 2.1.2 (2000-02) as German standard)
Edition 2000-12

Integrated Services Digital Network (ISDN); user-network interface layer 3; specification for basic call control; english version ETS 300102-1:1990
Edition 1992-02

Integrated Services Digital Network (ISDN); user-network interface layer 3; specifications for basic call control; English version ETS 300102-1:1990/A2:1993
Edition 1994-04

Integrated Services Digital Network (ISDN); user-network interface layer 3; specifications for basic call control; Specification Description Language (SDL) diagrams; english version ETS 300102-2:1990
Edition 1992-02

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol - Signalling network layer for circuit-mode basic call control - Part 4: Test Suite Structure and Test Purposes (TSS&TP) specification for the user; English version ETS 300403-4:1997
Edition 1997-11

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; signalling network layer for circuit-mode basic call control - Part 5: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user; English version ETS 300403-5:1997
Edition 1998-08