Hah, in the EE space we call those optoisolators[1]. Super handy when connection questionable prototypes over USB. Never considered using it in a networking env

Hah, in the EE space we call those optoisolators[1]. Super handy when connection questionable prototypes over USB. Never considered using it in a networking environment but that does the trick! [1] https://en.wikipedia.org/wiki/Opto-isolator https://en.wikipedia.org/wiki/Opto-isolator