User's Manual Part 2

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6.4 UPNP
The Universal Plug and Play (UPnP) feature allows network devices,
such as computers from Internet, to access resources on local
host or devices as needed. UPnP-enabled devices can be
discovered automatically by the UPnP service application on the
LAN. This feature is enabled by default. No settings are required.
Enable UPnP: Check/uncheck to enable/disable the UPnP feature.
OK: Click to complete your settings.