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That's from your link.

However I've never seen a 16 way consumer coax splitter. I fear you are into commercial products now and need a home AV designer to step in. Ethernet is well discussed you most will like have runs from each jack to your electrical closet where later you install your choice of switched hubs and such.

That said, my last home had some dozen coax lines but what I did was only split to about 4 locations since I was not about to install twelve TVs.