HELP! I recently installed an FXII in a town with an Erickson CO switch and have a ROYAL pain in the rump. Occasionally, after hanging up from a conversation (Inbound or Outbound) the line will ring back to the system, with no caller there. I have changed every piece of equipment on the premises. I have two clients (directly across the street from one another) and with different equipment, it happens to them both on particular lines (which are associated with the same magazine at the CO). The CO has removed 3 way calling, and I have worked with Erickson's TS and the local CO rep from Qwest and still cannot reach a resolution. Appreciate ANY input from similar experiences. Thanks