Debsdec

I have aquired a set of 3 speeddome cameras made by americain dynamics. I am unfirmilare with these cameras and the equipment that came with it. I have a controler which is , a EMI box which has a silver network cable coming out and going into the back of the controller. We have a J BOX, Power supply box. The thing I dont understand is on the manual it says about a sensornet connections? any idea what these are and how they work?