Find the real coax path
Identify which wall plates connect to each other, where the cable modem enters the system, and whether any lines are disconnected behind blank plates.
Replace incompatible splitters
Old splitters or amplifiers may block MoCA frequencies. Use MoCA-rated parts when the existing hardware is unknown or visibly old.
Use a point-of-entry filter when required
A PoE filter can keep MoCA signals inside the home and reduce interference risk. Its placement depends on the provider handoff and splitter layout.
Test one link before scaling
Set up two adapters across the most important path first. After it is stable, add mesh backhaul, TV room, desk, or gaming endpoints.