Are we suppsed to upgrade the firmware or are these shipped with the most recent version and are expected to work right out of the box? What is the best practice to using multiple extenders on the...

Model : Hardware Version : Firmware Version : ISP : I have three TL-PA8010P kits I'm trying to make work in the old house from 1800s. It appears that as soon as I connect the 3rd TL-PA8010P kit...