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From: rbowman <bowman@montana.com>
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Subject: Re: Redundancy/Survival
Date: 29 May 2026 06:48:12 GMT
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On Fri, 29 May 2026 01:17:02 -0400, c186282 wrote:

>    Sounds like a basic "intercom" system, but might have wider uses. A
>    mere PI or Arduino might expand the horizon considerably.

My uncle had a setup where he used the house AC wiring for an intercom. It 
was homegrown and may or may not have been particularly legal.

https://en.wikipedia.org/wiki/Power-line_communication