My situation is this. I just received the home self install kit for tv and phone. I already have internet service. My cable comes in the basement but my computer modem is on the second floor and I have no phone jack in that room. Can I hook the supplied phone modem up to the in house line in the basement and leave the computer on it's existing modem? I'm also switching my tv's (4 tvs)over to cable from satellite. Can I still run all of the above off one cable( the one entering the house)?