Looking for a little feedback and perhaps insight. After a short period phones registered (green lit) in the system become Not Registered (red lit). This occurs sometime in a short period like 30min, or other times up to a day. It's always phone with little activity. If the phone is picked up it can still make calls, but any calls attempted to that extension fail until the phone is green lit again. 3CX on Win XP DIR-655 Router/Firewall Mitel 5212 Phones (old firmware 4.x) I don't think it's a 3cx issue, but would appreciate any thoughts. Thanks.