Integrated Services Digital Network (ISDN); Telephony 7 kHz, videotelephony, audiographic conference and videoconference teleservices - Digital Subscriber Signalling System No. one (DSS 1) protocol - Part 1: Protocol specification (Endorsement of the English version EN 300267-1 V 1.3.2 (2000-05) as German standard)
Edition 2001-02

Integrated Services Digital Network (ISDN) - Line Hunting (LH) supplementary service; Digital Subscriber Signalling System No. one (DSS1) - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 301484-2 V 1.1.1 (2000-04) as German standard)
Edition 2001-02

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) and Signalling System No.7 (SS7) protocols; Signalling application for the mobility management service on the alpha interface - Part 5: Test Suite Structure and Test Purposes (TSS&TP) specification for the network (Endorsement of the English version EN 301144-5 V 1.1.5 (2000-05) as German standard)
Edition 2001-02

Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol; signalling specification for frame relay service - Part 1: Protocol specification [ITU-T-Recommendation Q.2933 (1996), modified] (Endorsement of the English version EN 301174-1 V 1.1.2 (1998-10) as German Standard)
Edition 2000-05

Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol; signalling specification for frame relay service - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 301174-2 V 1.1.3 (1999-03) as German Standard)
Edition 2000-05

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) and Signalling System No. 7 (SS7) protocols; Call Forwarding on Not Reachable (CFNRc) supplementary service for Cordless Terminal Mobility (CTM) phase 1 - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 302094-2 V 1.1.3 (1999-09) as German Standard)
Edition 2000-05

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) and Signalling System No. 7 (SS7) protocols; Call Forwarding on Not Reachable (CFNRc) supplementary service for Cordless Terminal Mobility (CTM) phase 1 - Part 1: Protocol specification (Endorsement of the English version EN 302094-1 V 1.1.3 (1999-09) as German Standard)
Edition 2000-05

Integrated Services Digital Network (ISDN) - Explicit Call Transfer (ECT) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 300369-2 V 1.2.4 (1998-10) as German standard)
Edition 2000-10

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol; Data link layer - Part 4: Protocol Implementation Conformance Statement (PICS) proforma specification for the general protocol (Endorsement of the English version EN 300402-4 V 1.2.3 (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 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