3Com Baseline 2426-PWR Plus User Manual

Also see for 2426-PWR - Baseline Switch Plus: Product guide Installation and user guide User guide Release note

Contents

18 I NSTALLING THE S WITCHIf 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, stickingone in the marked area at each corner.Place the Switch units on top of each other, ensuringthat the pads of the upper unit line up with the recessesof the lower unit.Supplying Power to the SwitchPower problems can be the cause of serious failures anddowntime in your network. Ensure that the power inputto your system is clean and free from sags and surges toavoid unforeseen network outages. 3Com recommendsthat you install power conditioning, especially in areasprone to blackout, power dips and electrical storms.The unit is intended to be grounded. Ensure it isconnected to earth ground during normal use. Installingproper grounding helps to avoid damage from lightningand power surges.Before powering on the Switch, verify that the networkcables and the power cable are securely connected.CAUTION: The Switch has no ON/OFF switch. The onlyway to power on and power off the Switch is byconnecting and disconnecting the power cord. This iscalled “power cycling”.To power on the Switch:1 Plug the power cord into the power socket on the rearpanel of the Switch. Refer to “(7) Power Socket” onpage 13 for more information.2 Plug the other end of the power cord into a poweroutlet.When the Switch is powered on, the Power LED lightsup. If the Power LED does not light up, refer to “(6)Self-adhesive Pads” on page 13 for more information.Checking for Correct OperationAfter you power on the Switch, it automaticallyperforms a power-on self-test (POST). During POST, thePower LED on the front panel of the Switch flashesgreen.When POST is complete, the Power LED turns green. Ifthe Power LED turns yellow after POST, it means thatPOST failed and the Switch has entered fail-safe mode.The following summarizes the possible colors for thePower LED after POST.Status MeaningGreen The unit is powered on and ready to use.Yellow Power-on self-test or loopback test failed. TheSwitch is in fail-safe mode. This can happen if aport or ports fail when the Switch was poweredon.