Verizon uses MoCA between the ONT and their set-top boxes for the VOD features (using IPTV). With MoCA, the "return path" is in the 1GHz range. (The "forward path" is too, for that matter).
MoCA is essentially a local-area network that runs over coax, using bandwidth above 1GHz so it could co-exist on the the same cable with cable TV signals. (It runs at speeds up to 175megabits/sec according to what I read).
You'd need an amplifier built to work with MoCA. I don't know of any. I've never seen any. I don't know if anyone makes them.
