![]() Modern 'integrated' WiFi routers have this routing capability built-in, so you can use the WiFi router you already have, or the wired-only router you already have for this purpose. This means you must use a router to expand the number of devices that can use that connection, as otherwise Comcast will only deliver a single network address to the first device you connect. It sounds like the Comcast supplied cable modem does not have a built-in network switch and only has a single Ethernet port on it. Ultimately, consider it a long Ethernet cable. The Ethernet signal is simply encapsulated for MoCA and sent through the coaxial connection, and decapsulated on the other end back to Ethernet. The adapter you purchased is a 'bridge' type adapter, in which case the concept is that of a fancy media converter. Should this work? Is the MoCA adaptor smart enough to just route LAN traffic? Am I likely to run into trouble with Comcast expecting the router to have a certain MAC address, or any of that sort of nonsense? If I'd be better off just running 50' of cat5 under the floorboards, I'd rather find that out before I go any farther down the MoCA route. On the other hand, I might have a wired router at the bottom of a box somewhere, in which case this seems like it might work, in theory: wall #1 -coax-> splitter -coax-> cable modem PC However, that's another $80-$100 down the drain plus it seems stupid. Now, there is a third cable outlet elsewhere in the house, so theoretically we could get a third MoCA adaptor and plug both it and the cable modem into that outlet, while using MoCA adaptor #1 just to hook up the PC. However, before getting this far, we realized there was a problem: neither the cable modem nor MoCA adaptor #1 have a free Ethernet port, so there's no place to plug in the wired PC. We got an Actiontec ECB2500CK01 two-adaptor MoCA kit and, following the instructions and some internet forum advice, set it up as follows: wall #1 -coax-> splitter -coax-> cable modem MoCA adaptor #2 -cat5-> wifi router We do have another cable outlet at that end, though, so we're contemplating using MoCA to run ethernet over the cable setup. Unfortunately, though, the wifi signal doesn't reach to the back of the house. (The modem is an Arris TM822G DOCSIS 3.0 model that also provides phone service). We have these all set up in the same room and it basically works: wall -coax-> cable modem -cat5-> (WAN) wifi router (LAN) -cat5-> PC We have Comcast cable internet, and we want to connect two devices: one WiFi router, and one PC via a wired connection.
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