I don't understand the problem. Doesn't the gateway have Ethernet connectors on the inside?
Solution for By-Passing Xfinity Fiber-Optic Modem/Router
I am trying to find a way to by-pass the Xfinity Arris X5001 fiber optic gateway unit with ethernet cables. Is there a fiber-optic switch that I could feed the line SC/UPC fiber-optic cable through and to a less noisy fiber-copper converter?
Anyone have some experience with this?