DS EN 50090-5-2:2004
DS EN 50090-5-2:2004 Home And Building Electronic Systems (Hbes) - Part 5-2: Media And Media Dependent Layers - Network Based On Hbes Class 1, Twisted Pair Describes the mandatory and optional requirements for the medium specific physical and data link layer for HBES Class 1 Twisted Pair in its two variations called TP0 and TP1.