Westermo MRD-3x0 - Manual (Page 21)

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To upload the file to the MRD-3xx click the Upload button.
The file will now be uploaded to the MRD-3xx and, when it
is complete, information on the upgrade file will be displayed,
as shown in Figure 19. At this point the you can chose to can-
cel the upgrade by clicking the Cancel Upgrade button.
Figure 19: Upload the upgrade file.
To proceed with the upgrade click the Upgrade button, the
page will change to that shown in Figure 20. The firmware
upgrade will now proceed.
Figure 20: Upload the upgrade file.
Note: The upgrade will take several minutes to complete
after which the MRD-3xx will reboot, during this time the
power to the MRD-3xx must not be removed.