Etalon ethernet isolator.

[ogs]

The schematic for the  Emosafe looks identical to the one posted yesterday by K4680, in terms of the 'LAN transformer' arrangement at least.

Also note that Antoine mentions the EMO Systems EN70 HD back in post #11. 

So very similar in principle, as to how the quality of components / performance compare, I have no idea.

Optic isolation is probably better. As written earlier in this thread the transformers used are similar to the ones used as standard on every ethernet input. Might be higher quality, but not as effective as optics I guess. Then we must fight noise in the electronics of the FMC... or start the crusade to have Devialet and others offer optical inputs in their devices. Would be possible if they use SFP slots. There are modules for copper too in addition to fiber.