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[–] -2 points 1 year ago (3 children)

Signals aren't magic, they consist of electrical power. You can get at least a little bit of power from anything that isn't an optical port.

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  • [–] 2 points 1 year ago* (last edited 1 year ago)

    Technically, even an optical port can deliver power. Light is just a particular form of electromagnetic wave that just happens to use another method of transmission (and you might need a different mechanism to transform its energy), but it also has an intensity, potential energy and resistance in the medium of propagation.

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