The purpose of resetting the phone is to revert the phones settings to default and clear data created by previous user.
The steps for restoring Factory Defaults are dependent on the phone model. The following steps cover the Polycom VVX 300, 400, and 600 series.
1. Reboot the phone
Either hold the 0, 1, and 3 keys while the handset is off the hook, or simply unplug the phone and plug it back in.
2. Press Cancel when the updater appears on screen. (Starting Application)
3. Immediately after pressing cancel while phone is rebooting hold the 1, 3, and 5 keys
This should provide you with a Password prompt
4. Enter the password required
If you do not have the password use the MAC Address listed above the barcode on the bottom of the phone.
5. The phone should reboot itself and be reset to Factory Defaults
You can check if the process was a success by accessing any of the Menu options that require a password (ex. Advanced in the Settings menu) and entering the default password. 456
Reboot Phone - Cancel - Hold 135 - PASSWORD - Reboot - Check Success