Originally Posted by scottyja
Thanks for the clarification. I think it's a little more clear. I found the following diagram that I think shows what you're saying.
Yes, good. I posted this for someone else yesterday and was about to post it for you too. Good man, you're on the right track now!
Originally Posted by scottyja
The part this is giving me difficulty is that the line that Comcast is sending in is completely separate from main coax wiring for the house. Would I add another splitter, shown here?Attachment 246022
What I don't understand is why the first MoCA adapter would need the cable internet line, since that only feeds the modem. Everything else is via ethernet. ...
OK, let's walk through this.
The top third of your second diagram is now correct.
The cable comes in to the MoCA adapter first and then has a coax out to feed the modem. The coax cable signal carries the internet connection and normally cable TV. The signal passes through the MoCA adapter to the modem where the internet signal is demodulated and comes out the Ethernet connection; nothing happens to the cable TV signal, dead end.
The Ethernet connection from the modem feeds the Ethernet signal of the router input. The router is now live and you have the beginnings of a network because routers route the signal to other devices etc. Your PC and what ever else can plug into the router too, and you have them networked via the router; you know this.
Remember your original goal was to extend your wired network through the house without running CAT5e and tearing up the walls, drilling holes, etc.
So, now we are going to take an Ethernet cable out of the router and bring it back to the MoCA adapter and plug it in the the MoCA adapter Ethernet connection.
The MoCA adapter will now take the Ethernet signal from the router and modulate it above 1Ghz and send it back down the same coax cable that is the coax in, input. This input is really an input/output that energizes or turns the home run coax through out the house into an Ethernet network over coax.
You have correctly joined the MoCA adapter coax (your second diagram, top third of the diagram) to the rest of the house coax by adding the splitter. That splitter should have a POE filter combined with it or in front of it to prevent the MoCA signal from traveling back outside. Very important to do this.
OK, so far so good?
Now, you show the coax going through the wall to a three-way splitter. The coax must go to the input side of the splitter. You show it going to the output. You could make this a two-way splitter but three is OK too. We'll come back to this. Remember, all of the splitters must work above 1GHz to be able to pass the MoCA frequencies (use 2GHz splitters).
Ok, the coax coming out of this splitter should go to the input of the next MoCA adapter (You show it connected to the video out). This MoCA adapter is now seeing the modulated Ethernet signal from your router carried by the coax from the first MoCA adapter. The MoCA adapter will now demodulate the Ethernet signal and you can take it off of the MoCA adapter Ethernet connection and feed your X-Box. The Video out of the MoCA can be used for a TV, etc.
The X-Box will talk back to the network via Ethernet connected to the MoCA adapter where the X-Box Ethernet signal is modulated at the MoCA adapter, sent back over the same input coax to the first MoCA adapter, demodulated and sent over the Ethernet to the router, etc., etc.
Back to the splitter, we still have one drop to feed your basement.
Bring the coax from the splitter to the third MoCA adapter in your basement. Feed the coax to the MoCA adapter coax input. Bring the video out coax and the Ethernet cable from the MoCA adapter to your HTPC.
Now you have an Ethernet over coax wired network.
Oops! We forgot your OTA antenna. (not really) Bring your OTA coax and screw it into the three-way splitter. The OTA signal will be distributed over the coax attached to the coax network including the video outs of the MoCA adapters. Provided you don't run into any frequency/amplifier interference it should work. But I can't guarantee it.
You can hang an Ethernet switch off the MoCA adapter at a location if you need to.
Additional MoCA adapters can be connected to other coax drops as long as the drops are connect to a common point.