Sitecom WL-366 User Manual page 45

UPnP
With UPnP, all PCs in you Intranet will discover this router automatically. So,
you don't have to configure your PC and it can easily access the Internet
through this router.
UPnP You can enable or Disable the UPnP feature here. After you enable the
UPnP feature, all client systems that support UPnP, like Windows XP, can
discover this router automatically and access the Internet through this router
without having to configure anything. The NAT Traversal function provided by
UPnP can let applications that support UPnP connect to the internet without
having to configure the virtual server sections.
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