- Press 3+6+9+Hold (simultaneously)
- Press 0
- On the right-hand side press the 4th button up from the bottom (on the left-side column if you have a 2-column phone)
- Button Light On: Beep tone is on
- Button Light Off: Beep tone is off
- Press Hold to set the option
- Pickup the handset and then put it back on the cradle to exit the Program Mode