20Mute FunctionIf you wish, you can speak privately to someone else in the roomwithout your caller overhearing. You will still be able to hear thecaller but they cannot hear you during the mute operation.To switch on the mute mode during a call just press and holdbutton. Your caller will not be able to hear you anymore. Releaseto resume the conversation with your caller.Handset Volume SettingDuring a call, the handset volume can be adjusted to one of 10 levelsusing the control knob located on the handset cradle of the CL320unit. When the handset volume is set to anything greater than “0”,the handset volume LED will light up.Note: Setting the receiver volume to maximum may under certaincircumstances, cause ear damage. Therefore, it is recommend thatyou reset the volume to “0” after each call.Speaker Volume SettingDuring a call in handsfree mode, you can adjust the speaker volumeto a desirable level. Simply use the slide control located on the rightof the CL320 unitTone Control SettingDuring a call, in handsfree mode, you can adjust the tone to adesirable level. Simply use the slide control located on the right ofthe CL320 unitNote: Tone adjustment is not possible when the receiver volume isset to its minimum level.USING THE TELEPHONE