This configuration requires a MoCA filter.
This configuration requires a MoCA filter.
Are you considering a MoCA filter for this configuration? It’s unclear if MoCA can bypass the Ethernet link connected to your first MoCA adapter and the ISP coax through your router. In short, after our basement was completed, the original ethernet run in the ceiling to the living room TV area had faulty wiring, limiting speeds to 10 Mbps even when connected to a rarely used PC. The person responsible didn’t address the issue as requested and has since stopped following up on other tasks. There’s no practical way to replace or rerun the cable without replacing the ceiling. Instead of using the Ethernet connection, you might explore using the existing coax from the old cable box via MoCA to restore wired internet to your entertainment center. Regarding a filter: given the setup—only one connection beyond the router and no PoE support—it’s unlikely performance will be affected. The absence of an attenuator doesn’t guarantee issues, but it’s wise to confirm. If this matters, your Xfinity service is already reaching your Netgear C7800 router directly with no splitters, so additional filtering probably isn’t necessary.
Filter is required only when COAX-only lines/routes return to the ISP, which they don’t in your situation. To skip MoCA setup, you might assume the Ethernet problem lies at one or both ends and try re-crimping or re-terminating there. This could be straightforward if wires are directly inserted into a wall jack (often called a keystone connector) instead of being crimped onto plastic connectors.
Thanks for your support. It seems the search results are exactly what I need, even with extra details. The simple fix attempt didn’t work, and there’s some uncertainty about the cable connections since the electrician used two cables with couplers. My mom is really good at choosing reliable contractors. Things are challenging here—hiding a new Ethernet run near a fireplace isn’t easy, and I’d prefer discreet floor molding instead of cutting into the ceiling. The MoCA solution appears to be the best option that won’t affect appearance.
Because numerous pieces of writing overlook homes that get internet through coax or use modems that support outgoing MoCA—something that applies whether it's just incoming from your provider or includes the full net connection—having a filter is essential. A 15-foot run typically ensures solid 5 GHz performance, so you shouldn’t hesitate to install one. If you’re interested in the details of running cables to a TV above your fireplace with drywall covering, proceed at your own risk. I had to cut through two drywall sections for cable inlets, locate the vertical stud where the cable will enter, and measure the height you need. For the tube size, I chose ENT based on my current and planned cable dimensions. Verify local building codes to confirm the maximum hole size for your stud type. If the hole isn’t sufficient, consider alternatives or reinforce the stud. Use a hole saw that’s at least an inch wide for best results; a bore drill might suffice for smaller gaps. Place the tube between the inlets and secure it behind them, then run cables through it. Once done, replace the drywall where you drilled and enjoy your in-wall setup.
Interestingly, WiFi tends to perform better on TVs because many devices use just 100Mbit Ethernet ports. This works well since video decoders rarely reach that speed. Still, in a household with lots of WiFi gadgets, congestion can become an issue if other activities consume the remaining bandwidth.