Originally Posted by joy_division
The Roamio will not be connected to my router via ethernet. Do I need it connected to the router via MoCA, or only if I want to do streaming? Or will the mini not work unless my Roamio is connected via MoCA?
So, let's make this clear.
I want a Roamio and a mini. How many MoCA adapter do I need? I will not be using ethernet anywhere.
You will need to have the units connected to the internet at all times for them to function correctly, not just for streaming.
You can have a Roamio and Mini with just coax. You will need ONE Moca adapter connected to the router, unless you have FIOS for your internet service. (FIOS provides Moca networking)
The adapter will create the Moca network and then the Roamio and Mini will both connect to your ethernet network/ the internet via Moca networking over the coax.
As mentioned above, if you are not using FIOS it is also recommended that you use a Moca POE (point of entry) filter on the incoming line to block your Moca networking signal from leaving the house. (<$10 delivered on ebay... tivos shipping is high)
Edit to add: oops, got distracted while writing my reply and got beaten to the punch by a pretty picture!