Integrated Services Digital Network (ISDN) - Signalling System No. 7 - Transaction Capabilities (TC) version 2 - Part 1: Protocol specification (ITU-T Recommendations Q.771 to Q.775 (1993), modified); English version ETS 300287-1:1996
Edition 1997-11

Springs - Vocabulary (ISO 26909:2009); Trilingual version EN ISO 26909:2010
Edition 2010-08

Industrial systems, installations and equipment and industrial products - Structuring principles and reference designations - Part 2: Classification of objects and codes for classes (IEC 81346-2:2019); German version EN IEC 81346-2:2019
Edition 2020-10

Integrated Services Digital Network (ISDN) - Freephone (FPH) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user (Endorsement of the English version EN 300210-3 V 1.2.4 (1998-06) as German Standard)
Edition 2000-05

Integrated Services Digital Network (ISDN) - User-to-User Signalling (UUS) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user (Endorsement of the English version EN 300286-3 V 1.2.4 (1998-06) as German Standard)
Edition 2000-05

Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol; Point-to-point multiconnection bearer control specification in a separated call and bearer environment - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification (Endorsement of the English version EN 302093-3 V 1.1.2 (2000-06) as German standard)
Edition 2000-12

Integrated Services Digital Network (ISDN) - Closed User Group (CUG) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user (Endorsement of the English version EN 300138-3 V 1.3.4 (1998-06) as German standard)
Edition 2000-01

Integrated Services Digital Network (ISDN) - Malicious Call Identification (MCID) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user (Endorsement of the English version EN 300130-3 V 1.2.4 (1998-06) as German version)
Edition 2000-01

Integrated Services Digital Network (ISDN) - Malicious Call Identification (MCID) 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 300130-5 V 1.2.4 (1998-06) as German standard)
Edition 2000-01

Integrated Services Digital Network (ISDN) - Conference call, add-on (CONF) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user (Endorsement of the English version EN 300185-3 V 1.2.4 (1998-06) as German standard)
Edition 2000-01