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You can adjust the audible tone of the buttons on the keypad to make them louder or softer.
To increase or decrease button volume:
  1. Press MENU button
  2. Use arrow keys on right of screen and scroll down to Phone Setup and press SELECT
  3. Scroll down to Console and press SELECT
  4. Scroll down to Tone Volume and press SELECT
  5. Use up and down arrow keys to change the volume of the tone. You will hear a sample tone each time. When you are finished press OK
  6. Press BACK button until you return to main screen