@benjojo It seems to talk about it in terms of loud noises; but given it's a strong field around the fibre, isn't it https://en.wikipedia.org/wiki/Faraday_effect ?

@benjojo Yep. One of the many reasons why we try to avoid renting dark fiber on HV lines.

@benjojo oh wow, that's interesting. I'll have to try to remember that when we bring up the first 400G over those fibers next year.

@nicoduck @benjojo optic DOM exposes a measure in "kiloradians/sec".. it's always been zero when I've looked. :)

@flangey @benjojo I'm currently trialing 400g on a link (~110km) and have 1.0 and 3.0 on the optics. I should try to get those into librenms or prometheus when we install the final stuff next year

@benjojo I know people use spare fibers for all kinds of environmental monitoring, would be fun if there were useful data that networking devices could log as a side-effect of measurements they have to do anyways.

@benjojo Huh, TIL!

@benjojo reminded of this old gem https://www.youtube.com/watch?v=tDacjrSCeq4

@benjojo tfw there's electromagnetic interference in your optical fiber

@benjojo . DO NOT SCREAM AT THE FIBER CABLES .