I need to get an ethernet connection 150 feet from my computer room. I want to run a remote laptop in this new area. Wireless is too slow so I want to get an ethernet hookup. This is in an old house, so I can't run any new ethernet cables w/o major construction issues. In the new room where I want to get this ethernet connection, I do have 75 ohm coax video cable runs already in place for running security cameras and also older 3/4" video machines. This panel has bnc connectors. If I buy a coax to ethernet adapter, will this work. Is coax/cable TV cable the same as the older 75 ohm video cable? So could I find a bnc to cable TV coax adapter for this? Thanks.