Hard wiring optik box

[wireless]

The box in my back room froze repeatedly. I ran cat5 cable from the router all the way back to it. Problem solved; however, I have a steaming device as well so how do I distribute the good wired connection wirelessly back there? Or can I split the cable?

More... (https://forum.telus.com/t5/Internet-Home-Phone/Hard-wiring-optik-box/m-p/138342#M33967)