When I had DSL, I bought a Radio Shack phone polarity checker. I made sure all the extensions were wired correctly. After 3 months of having FIOS, I found the tester and decided to try it. It reads a red light on all phones. That means our home phones are all hooked up backwards. Should I care or even switch the wires in my basement. However, all the phones ring normally and we can make and receive calls just fine. The TV and internet also work fine. Should I ignore this. (If it is not broken, don't fix it.) I did not even bother telling Verizon or anybody here about this. Can this lead to phone failure in a few years?