I just had a brief visit back at the house yesterday. The cable seems to have integrity, but it is indeed 350 feet long, apparently the reason they used extenders. I did not plug in my laptop to test yet as I ran out of time again.

My emphasis has been on getting an Eero to connect wired out there. Simple connection from the house network (Netgear) switch with the long cable, and the Eero does not connect wired, it only will connect wirelessly. I took the Eero in the house and set it up inside, so I could just carry it out and have it reconnect. No dice. Add the extender, and it still will not connect wired. Do these extenders have any smarts that could exclude certain traffic?  I know this was originally installed for the camera system.

Will have to go back for another fling.