If you encounter any problems, reset the device to its factory default settings and reconfigure. You may wish to use your backed up old configuration as a guide in this process, but do not restore it directly.
If you are upgrading a device that you do not normally have physical access to, e.g. at a remote or client's site, we strongly recommend that following the upgrade, you reset the device to its factory default configuration and reconfigure as a matter of course.
Note
To restore factory default settings, press the black Reset / Erase button on the rear panel twice.
185
Appendix D – Firmware Upgrade Practices and Precaut ions
