18INSTALLING THE SWITCH
If you are placing Switch units one on top of the other, you must use the
Place the Switch units on top of each other, ensuring that the pads of the upper unit line up with the recesses of the lower unit.
Supplying Power to the Switch
Power problems can be the cause of serious failures and downtime in your network. Ensure that the power input to your system is clean and free from sags and surges to avoid unforeseen network outages. 3Com recommends that you install power conditioning, especially in areas prone to blackout, power dips and electrical storms.
The unit is intended to be grounded. Ensure it is connected to earth ground during normal use. Installing proper grounding helps to avoid damage from lightning and power surges.
Before powering on the Switch, verify that the network cables and the power cable are securely connected.
CAUTION: The Switch has no ON/OFF switch. The only way to power on and power off the Switch is by connecting and disconnecting the power cord. This is called “power cycling”.
To power on the Switch:
1Plug the power cord into the power socket on the rear panel of the Switch. Refer to “(7) Power Socket” on page 13 for more information.
2Plug the other end of the power cord into a power outlet.
When the Switch is powered on, the Power LED lights up. If the Power LED does not light up, refer to “(6)
Checking for Correct Operation
After you power on the Switch, it automatically performs a
When POST is complete, the Power LED turns green. If the Power LED turns yellow after POST, it means that POST failed and the Switch has entered
The following summarizes the possible colors for the Power LED after POST.
Status | Meaning |
|
|
Green | The unit is powered on and ready to use. |
Yellow | |
| Switch is in |
| port or ports fail when the Switch was powered |
| on. |
