I have an Avaya Partner II, ver R4.0.1 with 206 modules. When a call comes in and isn't answered, the line keeps ringing indefinitely. This line is a MagicJack. Has anybody experienced the same problem with MagicJack? I have two other MJ's in the system as CO lines, and they don't do this. I've swapped MJ's and the problem persists on line 5, regardless of what is providing the dial tone - MagicJack or Qwest.