40 CHAPTER 2: INSTALLING THE SWITCHThe Switch 5500 supports 3Com 802.3af equipment. For the latest list ofsupported devices, refer to the product page on the 3Com web site athttp://www.3com.com/For further information on Power over Ethernet, refer to the Power overEthernet Configuration chapter in the Configuration Guide supplied onthe CD-ROM that accompanies your Switch 5500. Power over Ethernetmanagement is available using the web interface or the command lineinterface (CLI).Placing Units OnTop of Each OtherIf the Switch units are free-standing, up to eight units can be placed oneon top of the other. If you are mixing a variety of SuperStack ® units, thesmaller 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 feet supplied. Apply the feet 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 feet of the upper unitsit fully on the lower unit.The Power-upSequenceThe following sections describe how to get your Switch 5500powered-up and ready for operation.Powering-up theSwitch 5500Use the following sequence of steps to power-up the Switch.1 Plug the power cord into the power socket at the rear of the Switch.2 Plug the other end of the power cord into your power outlet.The Switch powers-up and runs through its Power On Self Test (POST),which takes approximately 1 minute.Checking for CorrectOperation of LEDsDuring the Power On Self Test, all ports on the Switch are disabled andthe LEDs light in a rapid sequence.When the POST has completed, check the Unit Status to make sure thatyour Switch is operating correctly. Table 13 shows possible colors for theLED.
