Polycom Horizon VVX-450 User Manual page 19

Entering the "Wi-Fi" menu option will present the current status, which as default will be "Off"
To enable this functionality, navigate down to "On" and press the "Select" key
Once this is selected, the phone will advise you that it requires a reboot, select "Cancel" to go
back or "Yes" to continue with the reboot.
It's important to note that when the device boots up, it will no longer be able to obtain an IP address
via the wired connection (Both Wired and Wireless cannot run in parallel)