This may sound stupid to some, but I'm an electrician with very little experience when in comes to wiring for phones. On the houses I've wired, there have always been different(low voltage) crews that came in and wired the phone, cable, etc. My question is this. I'm finishing my basement and I have a phone cable running from the upstairs, across the basement, and back upstairs. Can I tap into it and run a parallel line to my phone jack box? Or, do I have to hook it up in series(run 2 wires to my box)? Like I said, I'm pretty green when it comes to this, so any help is appreciated.