Check MoCA Compatibility: You will need 1 ECB for a MoCA compatible router or 2+ for non-MoCA routers. Most FiOS routers are compatible. Connect ECBs in each room with coax for wired access and switches to the ECBs for more ethernet connections.
Device Compatibility: This MoCA adapter for ethernet over coax works with most devices and routers with an ethernet port. However, some DOCSIS 3.1 modems might conflict (frequency overlap) and cause random disconnects. Check with your ISP for a fix.