I have a DirectTV DECA Ethernet to Coax Adapter Gen 2. They are bi-directional so coax to ethernet is the same device. They don't even have to be used in pairs. With this splitter you can split them on the coax side. I use 3 outputs and close the other. I have Ethernet almost everywhere in my house to counteract jammers from my neighbors. I'm sure some people have boosters for 2GHz. And 5Hz is strange because of the adaptive channel search of all routers. I cut the cable a long time ago so this is internet use only. If you still have cable TV, you need filters.
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