ZyXEL Communications NBG-4600N User Manual page 291

Chapter 22 Tools
The NBG-460N automatically restarts in this time causing a temporary network
disconnect. In some operating systems, you may see the following icon on your
desktop.
Figure 173 Network Temporarily Disconnected
After two minutes, log in again and check your new firmware version in the
Status screen.
If the upload was not successful, the following screen will appear. Click Return to
go back to the Firmware screen.
Figure 174 Upload Error Message
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NBG-460N User's Guide