StephenJC said:
If I have a CCK as part of my set up, can my laptop get internet if I connect the DECA to it, or will they only share internet with DirecTv receivers?
You can get a second CCK and get internet through that. A CCK is nothing but prettier DECA that gets powered by a traditional wall wart. Alternatively, you can get a DECA with a power adapter.
Because I live in a 2 story house with no basement, there's no good way to run ethernet wiring that doesn't involve a lot of drywall patching. I've been relying on DECAs for connectivity for a couple years. I have one DECA with a power supply (connected to an Ethernet sprinkler system controller), 3 CCKs (two on PCs, one connected to the router), running in addition to two HR24s. It all works extremely well, they behave like solid 100mbps ethernet connections. Despite very heavy use, I've never had the slightest problem with LAN activities interfering with MRV on my HR24s.
That said, the usual caveats apply - doing something like this is not supported by DirecTV, and if you're having issues, you should return your setup to its normal state before asking DirecTV for help. Because I've added 3 ports for the additional connectivity, the HR24's rate mesh diagnostics were helpful to verify that my DECA signals were all in good shape.