—Default password WEB+Advanced
username: admin
password 456
——-Format the device and place a new configuration
Download the latest firmware and extract to a FAT32 USB
Add the cfg files to /config folder
1Ensure that the phone is powered off.
2Plug in a USB device.
3Power up the phone.
4When the Polycom logo displays, press and hold with four fingers the four corners of the LCD screen until the LEDs blink. (Blinking rotates between orange/red/green/off).
5Remove fingers from the LCD screen. Recovery process is complete when the device reboots.