In the kitchen of my house I found a strange looking wire.
It almost looks like an old telephone wire -- with 4 wires, red/green
and yellow/black -- except it has only 3 of the 4 wires. I'm not
positive as I write this, but I believe it is missing black. In
addition, the wires are thicker than typical telephone wires, though
not as thick as electrical wires.
Can anyone tell me what this is? Can I still wire it to a jack and
use it as a phone line?