Edimax Technology 3G-6200n - Manual (Page 74)

73
support UPnP, like Windows XP, can discover this
router automatically and access the Internet through
this router without any configuration. The NAT
Traversal function provided by UPnP can let
applications that support UPnP smoothly connect to
Internet sites without any incompatibility problem due
to the NAPT port translation.
ALG Setting
You can let special applications that require
“Application Layer Gateway” to be supported here.
Static Routing
You can disable NAT function and setup the routing
rules manually.
Click on one of the above NAT selections and proceed to the manual's
relevant sub-section.