Polycom VVX 400 - Changing the Speaker Volume; Changing the Ringer Volume; Muting the Microphone

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From the Contact Directory, use the up and down arrow keys to select the contact you
want to update, and press Info.
From the contact’s information screen, press Edit.
From the Edit Contact screen, use the up and down arrow keys to select Ring Type.
Select the ringtone you want, and then press Save.
To select a ringtone for a contact :
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Changing the Speaker Volume
To change the volume of what you hear during a call, press one of the Volume keys, ,
to lower or raise the speaker volume.
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Changing the Ringer Volume
To change the volume of the incoming call ringtone, press one of the Volume keys, ,
while your phone is idle or ringing.
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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 when you
mute the microphone.
During a call (including a conference call), press .
To mute the microphone :
The Mute key glows red. The other parties can’t hear you. To disable Mute, press again.