KX-NT300/KX-NT500/KX-DT300/KX-DT500/KX-T7600
While on-hook
Press Up or Down
Press Right
until the feature appears.
four times.
KX-UT series
While on-hook
Menu
OR
Press "Menu".
All manuals and user guides at all-guides.com
OR
Press Up or Down
until the feature appears.*