Placing Units On Top of Each Other 27Placing Units OnTop of Each OtherIf the Switch units are free-standing, up to four units can be placed oneon top of the other. If you are mixing a variety of SuperStack II Switch andHub 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 theself-adhesive rubber pads supplied. Apply the pads to the underside ofeach Switch, sticking one in the marked area at each corner. Place theSwitch units on top of each other, ensuring that the pads of the upperunit line up with the recesses of the lower unit.Stacking Units Switch 1100 and 3300 units can be stacked together and then treated asa single manageable unit with one IP address.You can stack Switch units together in two ways:n The matrix port on the rear of the Switch allows you to connect twoSwitch units back-to-back. For this you need a Matrix Cable (partnumber 3C16965). Contact your supplier for details.n The Expansion Module slot at the rear of the Switch allows you toinstall a Matrix Module (part number 3C16960). The Matrix Moduleprovides four ports and allows you to interconnect up to four Switchunits using Matrix Cables.Stacking Two Units To stack two Switch units, you only need one Matrix Cable. The Switchunits can be rack-mounted or free-standing; if you choose to have themfree-standing, remember to position the rubber feet as detailed in“Placing Units On Top of Each Other” above. When positioning Switchunits, note that Matrix Cables are 1m (3.28ft) long.16950ua.bk Page 27 Thursday, August 27, 1998 11:55 AM