I'm looking for a better, more private solution to an intercom I have between the house and my barn. I have Ethernet run out there, and I currently use the "drop-in" feature on some Amazon echo devices. I'm looking to get away from the Amazon devices entirely (maybe implementing the pine speaker they announced?)

I don't have a lot of requirements, though VoIP would be preferred over a radio style, since it's a metal barn and blocks a lot of signals. I'm good with some self hosted solution, and ideally there's a dedicated device, as I don't want to use my phone or computer for it all the time. I'm probably missing some obvious solution, but figured I'd try to get some ideas together.

Thoughts?

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[–] linearchaos@lemmy.world 1 points 2 months ago

If you can find landline phones with that feature set, just get them. You can just wire them together and put 20 volts DC in the line. Of course you're not going to want to do that over your single ethernet run but if you had multiple...

Telephone services really simple, 18 to 24 volts on hook should pull down to about eight or nine volts when you open the line. If you pulse a 90 volt signal, It will cause them to ring.