Can not connect to new security system
I just got new security system I'm having trouble with. The NVR connects to the network via a ethernet cable, and it's connected to my AT&T Gateway. When you look at the lights on the back (where the ethernet cable plug in, there is no light on, which I think means no power/not connected. How do I get my Gateway to recognize the security system cable, as it does for my AT&T internet?