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The original was posted on /r/homeassistant by /u/snobound2 on 2024-11-13 19:56:13+00:00.

My house has land line phone wires going to phone jacks in every room except the bathrooms. They are no longer connected to the phone company and all terminate in a box next to the circuit breakers in the basement. So… this leads me to this question to the group:

What is your idea on how to re-purpose this network of wires?

I’ll start . Power the lines w/ low voltage ac (24vac door bell transformer), rectified and filtered at each drop to power presence detectors in each room.