Cintron...for homes/apt that already have coaxial cables routed to each room (sounds like you have one to TV and to office upstairs) there is probably a master control cable box somewhere in a closet where the COX signal is first sent. If you open the box, at least on mine, I see the main COX line that is split to another modem (for phone) and a wire going into a multiple cable box. From this switch, I saw multiple coaxial cables, that go to each room. I remember that when I first got the Cox service, the technician had to find which cable went to which room by sending a signal down each and having me at each room attaching a receiving tool to see when the signal appeared. The Cox tech implied that making too many "active" lines could reduce the quality of the single signal, since they are all being split. Something like this, I believe.
If you do have a box in the closet, you need COX to identify and "activate" the line you want. However, if you cable just comes into the house and you see a physical splitter, then one goes to your TV and others go somewhere else, apparently not to your upstairs room.
