@Kjell-Sundby For example this is the magnetics of the Seeed Studio's Breakout for Linkit Smart 7688 v2.0 board: Connect: P2 to ETH TX+ P3 to ETH TX- P4 to ETH RX+ P5 to ETH RX- GND to GND This is working well with Omega2(+) and any identical magnetics should work too.