Electronic Signatures and Infrastructures (ESI) - Electronic Registered Delivery Services - Part 2: Semantic contents (Endorsement of the English version EN 319 522-2 V1.1.1 (2018-09) as a German standard)
Edition 2018-12

Electronic Signatures and Infrastructures (ESI) - Electronic Registered Delivery Services - Part 3: Formats (Endorsement of the English version EN 319 522-3 V1.1.1 (2018-09) as a German standard)
Edition 2018-12

Electronic Signatures and Infrastructures (ESI) - Electronic Registered Delivery Services - Part 1: Framework and Architecture (Endorsement of the English version EN 319 522-1 V1.1.1 (2018-09) as a German standard)
Edition 2018-12

Terminal Equipment (TE) - Attachment requirements for pan-European approval for connection to the analogue Public Switched Telephone Networks (PSTNs) of TE supporting the voice telephony service in wich network addressing, if provided, is by means of Dual Tone Multi Frequency (DTMF) signalling (Endorsement of the English version EN 301437 V 1.1.1 (1999-06) as German standard)
Edition 2000-10

Integrated Services Digital Network (ISDN) - Signalling System No. 7 (SS7) - ISDN User Part (ISUP) version 4 for the international interface - Part 33: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for basic services (Endorsement of the English version EN 300356-33 V4.1.1 (2003-07) as German standard)
Edition 2004-07

Electronic Signatures and Infrastructures (ESI) - Registered Electronic Mail (REM) Services - Part 4: Interoperability profiles (Endorsement of the English version EN 319 532-4 V1.2.1 (2022-05) as a German standard)
Edition 2022-11

Electronic Signatures and Infrastructures (ESI) - Registered Electronic Mail (REM) Services - Part 3: Formats (Endorsement of the English version EN 319 532-3 V1.2.1 (2019-04) as a German standard)
Edition 2019-09

Integrated Services Digital Network (ISDN) - Completion of Calls on No Reply (CCNR) supplementary service - Service description (Endorsement of the English version EN 301134 V 1.1.1 (1998-10) as German standard)
Edition 2000-09

Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) and Signalling System No. 7 protocols - Signalling application for the mobility management service on the alpha interface - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user (Endorsement of the English version EN 301144-3 V 1.1.3 (2000-05) 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