if the switch units are free-standing, up to eight units can be placed one on top of the other. if you are mixing a variety of superstack 3 switch and hub units, the smaller units must be positioned at the top.

    if you are placing switch units one on top of the other, you must use the self-adhesive rubber pads supplied. apply the pads to the underside of each switch, sticking one in the marked area at each corner. place the switch units on top of each other, ensuring that the pads of the upper unit line up with the recesses of the lower unit.