USING THE TELEPHONE
Mute Function
If you wish, you can speak privately to someone else in the room without your caller overhearing. You will still be able to hear the caller but they cannot hear you during the mute operation.
To switch on the mute mode during a call just press and hold 
button. Your caller will not be able to hear you anymore. Release 
to resume the conversation with your caller.
Handset Volume Setting
During a call, the handset volume can be adjusted to one of 10 levels using the control knob located on the handset cradle of the CL320 unit. 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 certain circumstances, cause ear damage. Therefore, it is recommend that you reset the volume to “0” after each call.
Speaker Volume Setting
During a call in handsfree mode, you can adjust the speaker volume to a desirable level. Simply use the slide control located on the right of the CL320 unit
Tone Control Setting
During a call, in handsfree mode, you can adjust the tone to a desirable level. Simply use the slide control located on the right of the CL320 unit
Note: Tone adjustment is not possible when the receiver volume is set to its minimum level.
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