Dired help with GXW410X


I have a UCM 6208 it appears FXO Port 8 stopped working for some reason (when line is connected it gives a busy tone, already factory set the unit and nothing), I have a GXW410X that I want to configure so when a call is received on that line its forward to a extension.

I have tried following the instructions on the “Configuring UCM6XXX with GXW410X” but can get it to work. All I really need is that when a call is received on this line it rings on a specific extension.