Changing The Speaker Volume - Polycom VVX500 Full User Manual

Changing the Speaker Volume

To change the volume of the incoming call ringtone, press one of the Volume Keys,
phone is idle or ringing.
Muting the Microphone
Mute the microphone so other parties can't hear you. Microphone Mute applies to all modes (handset,
headset, and speakerphone). You can still hear all other parties while Mute is enabled.
To mute the microphone during a call (including conference call), press
The mute key glows red this means the other parties can't hear you. To disable Mute, press
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