30 CHAPTER 2: INSTALLING THE SWITCHThe Power-upSequenceThe following sections describe how to get your Switch 4400powered-up and ready for operation.Powering-up theSwitch 4400Use 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 10 seconds.Checking for CorrectOperation of LEDsDuring the Power On Self Test, all ports on the Switch are disabled andthe LEDs light in a set sequence.When the POST has completed, check the Power/Self Test LED to makesure that your Switch is operating correctly. Table 6 shows possible colorsfor the LED.Table 6 Power/Self Test LED colorsIf there is evidence of a problem, see “Solving Problems Indicated byLEDs” on page 58.Connecting aRedundant PowerSystemYou can connect a SuperStack 3 Advanced Redundant Power System(3C16071B) to the Switch. This unit, which is also known as an RPS, isdesigned to maintain the power to your Switch if a power supply failureoccurs.For normal redundancy, the Switch 4400, Switch 4400 SE, andSwitch 4400 FX require one Type 2A Power Module (3C16074A). For fullredundancy, the Switch 4400, Switch 4400 SE, and Switch 4400 FXrequire two type 2A Power Modules combined using a Type 2 Y-Cable.The Switch 4400 PWR (3C17205) requires one Type 3 Power Module(3C16075) for normal redundancy and two Type 3 Power Modules for fullredundancy.Color StateGreen The Switch is powered-up and operating normally.Yellow The Switch has failed its Power On Self Test.Off The Switch is not receiving power.DUA1720-3AAA07.book Page 30 Wednesday, March 17, 2004 1:14 PM