User Guides show you how to install and initially configure your router.  Select the router platform you are using. Some user guides are available in PDF format, as well as HTML format.     3000 Series D   GTX Series     3000 Series   GT 80 Series     GT900 Series    GT 60 Series     GT 70 Series   GTS 200 Series     GT 50   GTS 100 Series       GTAM     RBX 200 and 205       RBX 250     CNX 600       CNX 500           CNX Diagnostics