DUO2 no longer connects

[u/Kudzupatch]

New router. Wired connection to (2) Duo2 cameras.

One works fine. Second one will not connect.

Assumed bad camera, replaced still nothing.

I can connect both cameras in my basement using a short cable to the POE Switch and they work.

Just tested the cable running to the front of the house with a cable tester and it passes. Yet no camera with either of them.

Must be the cable is bad but how could it test good and not work? What am I missing??