There's also EFM/2BASE-TL which was a sort of IEEE rebadge of the ITU DSL standards with the OAM layer replaced with Ethernet OAM. I never quite figured out if

There's also EFM/2BASE-TL which was a sort of IEEE rebadge of the ITU DSL standards with the OAM layer replaced with Ethernet OAM. I never quite figured out if there was any point to it beyond NIH.