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); telephony 3,1 kHz teleservice; service description; english version ETS 300111:1992
Edition 1993-04

Integrated Services Digital Network (ISDN) - Telephony 7 kHz teleservice - Functional capabilities and information flows; English version ETS 300265:1994
Edition 1994-10

Integrated Services Digital Network (ISDN) - Videotelephony teleservice - Functional capabilities and information flows; English version ETS 300266:1994
Edition 1994-10

Digital Enhanced Cordless Telecommunications (DECT) - Test specification - Part 2: Audio and speech (Endorsement of the English version EN 300 176-2 V2.4.1 (2022-05) as a German standard)
Edition 2022-11

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 3: Interworking at the Inter-System Interface (ISI) - Sub-part 5: Additional Network Feature for Mobility Management (ANF-ISIMM) (Endorsement of the English version EN 300 392-3-5 V1.5.1 (2016-06) as German standard)
Edition 2016-11

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3 - Sub-part 21: Ambience Listening (AL) (Endorsement of the English version EN 300 392-12-21 V1.5.1 (2012-04) as German standard)
Edition 2014-09

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 3: Interworking at the Inter-System Interface (ISI) - Sub-part 2: Additional Network Feature Individual Call (ANF-ISIIC) (Endorsement of the English version EN 300392-3-2 V1.4.1 (2010-08) as German standard)
Edition 2011-04

Integrated Service Digital Network (ISDN) - Signalling System No. 7 (SS7); ISDN User part (ISUP) version 4 for the international interface - Part 20: Completion of Calls on No Reply (CCNR) supplementary service (ITU-T Recommendation Q.733, clause 5 (1999), modified) (Endorsement of the English version EN 300356-20 V 4.3.1 (2001-07) as German standard)
Edition 2002-01

Digital Enhanced Cordless Telecommunications (DECT) - Radio in the Local Loop (RLL) Access Profile (RAP) - Part 1: Basic telephony services (Endorsement of the English version EN 300765-1 V 1.3.1 (2001-04) as German standard)
Edition 2003-04