First thing I would do is Default the programing.
Go to operations, smartmedia and do a forced format ( I am assuming there is a smart media card plugged in).
If you want to go back to the way it is programmed now, do a backup and remove the card.
Make sure all the cards you need are in the CTX. For 4 lines, use an RCOU, without an RCOS piggybacked on it.
Got to operations, System Setup, and Initiallize the system. It will default with all lines appearing, and ringing on every phone.
** The system will put 4 lines into the system with 1 RCOU card (8 for RCOU/RCOS). If you have less the that, remove them from trunk assignments. If you dialed 911 it will pickup line 4 everytime, and if there is no line 4, you could not call 911. Saw it happen once.
Removing the battery strap on the proccessor, and booting up without a Smart Media card (or a backup on SM card) will also default the system.
