Factory default Polycom Confrence Phone
1. Press the Menu button.
2. Select Settings > Advanced.
3. Enter admin password (default 456)
4. Select Admin Settings > Reset to Defaults > Reset to Factory > Yes
Phone will reboot into factory defaulted state.
Factory Default without admin password
1. Find and copy the MAC Address of the phone. (found on the bottom on a sticker, or in the menus under Menu > Status > Network > Ethernet. Should be the first entry on the screen.)
2. Power off the phone by unplugging the power or network
3. Plug the phone back in
4. Wait until you see Cancel, then press Cancel button
5. Quickly press and hold down 6, 8, *
6. When prompted for admin password, enter the MAC address of the phone as the password.
7. You will be prompted again whether you would like to reset, proceed and your phone will reboot into a factory defaulted state.