To turn off echo when connecting a headset for the first time to your Polycom Telephone.
Note: the Menu or Home keys perform the same function but are named different based on the specific Polycom model.
HOME KEY is for VVX300, VVX400 & VVX500 Models
MENU KEY is for IP321, IP335, IP450, IP550, IP650 Models
Headset Settings for Polycom Telephones Turn Echo Off
Press the HOME KEY or MENU KEY
Press SETTINGS
PRESS 1 for BASIC
PRESS 1 for PREFERENCES
PRESS 3 for HEADSET
PRESS 3 for ECHO CANCELLATION
Select ENABLED
PRESS HOME KEY or MENU KEY
PRESS HOME KEY or MENU KEY Again