Hello! Yesterday our landline was working fine. today, we find that our phone doesnt ring. The phones acknowledge the incoming call as the screen displays the name and numeber calling. I unplugged everything and plugged 1 corded phone into the test socket, and tried again, still the same, so i unplugged the corded phone and tried the cordless phone in the test socket, same problem! Wierd! Anyone know what could be wrong?