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

European digital cellular telecommunications system (Phase 2) - Layer 1 - General requirements; English version ETS 300553:1994
Edition 1995-01

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol - Data link layer - Part 3: Frame relay protocol specification; English version ETS 300402-3:1996
Edition 1997-04

Home and Building Electronic Systems (HBES) - Part 5-1: Media and media dependent layers - Power line for HBES Class 1; English version EN 50090-5-1:2020
Edition 2021-02

Integrated Services Digital Network (ISDN) - Signalling interworking specification for ISDN User Part (ISUP) version 1; English version ETS 300343:1994
Edition 1995-01

Building automation and control systems (BACS) - Part 5: Data communication protocol (ISO 16484-5:2017 + Amd 1:2020); English version EN ISO 16484-5:2017 + A1:2020, only on CD-ROM
Edition 2023-02

Home and Building Electronic Systems (HBES) - Part 3-2: Aspects of application - User process for HBES Class 1; German version EN 50090-3-2:2004, text English
Edition 2004-09

Home and Building Electronic Systems (HBES) - Part 5-2: Media and media dependent layers - Network based on HBES Class 1, Twisted Pair; English version EN 50090-5-2:2020
Edition 2021-02

Intelligent Network (IN) - Intelligent Network Capability Set 1 (CS1); Core Intelligent Network Application Protocol (INAP) - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for Service Switching Function (SSF) and Specialized Resource Function (SRF); English version ETS 300374-4:1997
Edition 1998-08

Home and Building Electronic Systems (HBES) - Part 4-2: Media independent layers - Transport layer, network layer and general parts of data link layer for HBES Class 1; German version EN 50090-4-2:2004, text English
Edition 2004-07