I purchased my units for use with a Dish Network Receiver. They were installed per the instructions and were green in no time flat. Using a handset I was able to hear the dial tone loud and clear however when I tried to dial out, I could not. I attempted to hook the phone line directly to the Dish receiver and it would not dial out either. I moved the PhoneX units to different locations and had the same problem.I swapped out the phonelines on both ends.Yes they were plugged straight into the wall.Turning to the instruction pamplet, if they're green they work not much else in the way of troubleshooting. I ended up purchasing a similar RCA model locally that worked out of the box.