I didn't see you mentioning a MoCA filter. It's a device that connects to the cable before it enters the house at the ground block or the tap. I personally would put it at the ground block, because I didn't want to climb the pole just for a damn filter. Plus it only works with in 150 feet of the devices anyways. The MoCA filter is suppose to "bounce" back the MoCA frequency talk among the devices. It also kept from the neighbors from seeing the devices.

Is the cable that comes into the house a RG11 or RG7? If it's RG11, then the MoCA filter must be at least at the ground block. As RG11 is only used when the drop is 150feet or more.

This is a MoCA filter we used...

If you have to call the cable company. Hopefully you get someone that knows the stuff... like me ha.

KOT