Well, this feature is new to me. Only think I can think of is that it should work similar to bridge mode, once set, you should be able to connect the 885L wired to the router first, connect to the 885Ls web page at 192.168.0.50 if thats it's default address for that mode, then go thru and set up the extender mode settings and I presume it should have a scan feature to scan near by wireless SSID names, select the one you want it to connect to and then set the PW when connecting. Save then reboot. Disconnect the LAN cable from the 885L and place in it's remote location and from there I presume connected clients should get internet thru the 885L.