I'll be using the gocoax for a backhaul to my mesh AP. The only thing I'm unsure of is the need for a POE filter. Here is my setup. Demark to antronix ground block that shows 5-1002MHz input....so it's demark/internet ground block to....modem....to ethernet to router...Ethernet to gocoax...RG6...to gocoax to ethernet to AP. Is it necessary to install the POE filter before the demark? I have no splitters from exterior to in home wiring cabinet. It's all straight RG6 to my cabinet. Thanks...