This process will work as long as your lines are set for key ring by the installing technician.
While your handset is on hook press # 725, you will notice your line keys will light up, most likely they will be RED if your phone isn’t ringing on incoming calls. Tap each line key until they turn solid GREEN and the display reads “ALWAYS RING”.
If you want to make lines stop ringing tap each line key until they turn solid RED.
When you are finished making your changes press the speaker key until you exit programming.
