anyone know how to make an additional phone ring on a starplus flex?

At station 10 only do this:
Press ON/OFF button
Dial **5623
Dial *13 (for day ring) *14 (for night ring)
At the bottom row of buttons line 1 will be lit. The top part of the phone will show what extensions ring for that line. Turn the extensions on or off for ringing by pressing the appropriate station button. When finished press the HOLD button and then do line 2 and so on. To get out of program mode lift and replace the reciever. If you have any problems reply back here. There are two buttons on the phone (23,24) that extend the line/station range.