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by gitgud 2140 days ago
How about [1] "Power-line Networking". It's basically the act of using A/C power-lines for a computer network.

They work okay in home networks, but due to the noise of the active A/C power-line they don't scale that far.

Perhaps they could work in long distances at low bit-rates with high redundancy error-correction to account for the noise. Sending email and text messages...

[1] https://en.wikipedia.org/wiki/Power-line_communication