I moved into a house built in the 1950s in the north eastern US and this outlet is on the back of the house but I can't find anything like it searching online. If anyone knows what it is I'd greatly appreciate the enlightenment!

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[–] 10 points 2 days ago

This.

The jack type is the original Bell System jack. Used to have these in the house I grew up in. We had to buy the Bell 4-pin to RJ-11 adapter for the more "modern" phone.

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