5)Press select/ 
/audio tone or menu/clear (or the OK soft key on the base). The redialed number is deleted.
Adjusting the Ringer, Earpiece and Speaker Volume
Ringer volume
Press 
/volume up/down on the handset or on the base in standby mode. Your phone provides three ringer volumes (off, low, or high) on the handset, and four ringer volumes (off, low, medium, or high) on the base.
Earpiece and Speaker Volume
You can select earpiece volume from among six volume levels on the handset and the base. For speaker volume, select from among six volume levels on the handset and ten volume levels on the base. Pressing the volume up key or volume down key on the handset or base during a call will change the earpiece or speaker volume. This setting will remain in effect after the telephone call has ended.
If you press the volume up key when the earpiece is at the maximum volume level, an error tone sounds. The error tone also sounds if you press the volume down key at the lowest volume.
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