28 C HAPTER 2: INSTALLING THE SWITCHAs shown in Figure 9, connect one end of the Matrix Cable to the matrixport of the top Switch, and the other end to the matrix port of the lowerSwitch.Figure 9 A stack of two unitsStacking MultipleUnitsYou can connect up to four Switch units to form a stack. If you connectmore than two units, you need a SuperStack II Switch Matrix Module andthe appropriate number of Matrix Cables.You only need one Matrix Module for each stack.To stack multiple Switch units:1 Arrange your Switch units as required. They can be rack-mounted orfree-standing; if you choose to have them free-standing, remember toposition the rubber feet as detailed in “Placing Units On Top of EachOther” on page 27. When positioning Switch units, note that MatrixCables are 1m (3.28ft) long.2 Install the Matrix Module into one of the Switch units. You can findinstructions for doing this in the documentation that accompanies theMatrix Module. We recommend that for ease of configuration, the MatrixModule should be installed in the bottom Switch of your stack.16950ua.bk Page 28 Thursday, August 27, 1998 11:55 AM