Polycom RealPresence 800s Administrator's Manual page 544

RealPresence Collaboration Server 800s Administrator's Guide
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If the USB memory stick is inserted into the back of the server this option will be called Back USB.
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The Boot Manager Main Menu loads.
Select Bios Boot Menu.
The Bios Boot Manager is displayed.
Using the Up/Down arrows go to Hard drive C:.
A window will display showing two options.
Select Front USB.
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