Why would someone hook up telephone jack wire to light switches?

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I bought a house and in one of the closets there are two light switches next to each other, with what appears to be telephone cable wiring connected to the switches. From one phone cable wire “feed”: on one light switch, the red and black wires are attached, and on the other light switch, the green and yellow wires are attached.From what I can tell this is just standard telephone jack wire: it is just white wire with green/yellow/red/black wire inside. The previous owners had loads of telephones (like in every room), but I can’t for the life of me figure this out. Ive played with them a bunch and can’t see that they do anything. I’ve used my electric pen tester on it and not picking any electricity up, so it’s not like normal Romex wiring that is hot with electricity.What is this for? Why would someone do this? I am so confused lol via /r/DIY https://ift.tt/3iul7Iw

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