...and there was much rejoicing <yay> For future visitors of the thread, this still is a "split". The split just takes place at the amp/distribution block (a bit further back than "usual"). If you'd have disclosed the cable modem earlier, I'd have said to use that PoE filter for the TA. I could have asked, too. Just to button this all up nicely: You do have an actual PoE filter (before any splits or amps) where the single lateral coax feed comes into the house, right? If you do, you should be good to go. Telemark's point about the TA having an upstream/return channel (like a cable modem) was a valid point, if you have any TA/SDV issues in the future.