Here are the instructions and a link to the manual :
Key Tone
From the Handset Setup Menu:
1. Press the caller ID-volume ( 6 or 5) button to scroll to the
KEY TONE sub-menu.
2. Press mute/program button to enter the menu.
SET KEY TONE 4
1ON 2 OFF shows in the display. The default setting is
1ON.
3. Use the touch tone pad on the handset to select 1 or 2, or use the caller ID-volume ( 6 or 5) button to scroll to your selection.
Here is a link to the manual for you :
http://telecom.hellodirect.com/eBiz/pdf/phones/GE_28111_Manual.pdf
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