Quick question - does it matter which side is plugged into ISP line entering home or it should work both sides the same?
It doesn’t matter.
Surge protectors create conductive path between wires and PE when an overvoltage occurs. It doesn’t matter from which side of surge protector such surge originates.
Thank you!
This inforrmation should be noted on product page…
This information should be known by those who use this type of products.