MicroNet Technology SP3367A - Manual (Page 46)

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4.5.3 UPnP
Universal Plug and Play (UPnP): When a user plugs a device which
supports UPnP into the network, the device will configure itself, acquire a
TCP/IP address, and use a discovery protocol based on the Internet's
Hypertext Transfer Protocol (HTTP) to announce its presence on the
network to other devices.
You can choose “Activated” or “Deactivated” option from this session.
Auto-Configured (by UPnP Application): Choose “Activated” option to
allow UPnP-enabled applications to automatically configure the router so
that they can communicate through the router, for example by using NAT
traversal, UPnP applications automatically reserve a NAT forwarding port
in order to communicate with another UPnP enabled device; this
eliminates the need to manually configure port forwarding for the UPnP
enabled application. If you don’t want to make configuration changes
through UPnP, just choose “Deactivated”. Click Apply to save the
setting to the router.
Note: Every time you change a setting, you must click APPLY button
once to save the setting.