Above is the Annihilator Standby Switch Length Ordering Diagram. Please use the diagram (click to enlarge) to order the appropriate lengths for "A" (between the controller and the main unit) and "B" (between the router and the switch -- or the main unit if you do not have a switch). Please click picture above. When next page comes up, please click picture again. An "expand" picture button should come up (IE 6.0.29). Please click that button to get the full detail.