Integrated Services Digital Network (ISDN) - Signalling System No. 7 - Signalling interworking specification for ISDN User Part (ISUP) version 2; English version ETS 300360:1995
Edition 1995-11

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

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol, Generic functional protocol for the support of supplementary services - Part 2: Abstract Test Suite (ATS) specification; English version ETS 300806-2:1998
Edition 1998-12

Universal serial bus interfaces for data and power - Part 1: Universal serial bus specification, Revision 2.0 (IEC 62680-1:2013); English version EN 62680-1:2013
Edition 2015-02