3Com 5500-EI PWR, Getting Started Manual

Page: 30 / 118

30 C
HAPTER
2: I
NSTALLING THE
S
WITCH
Placing Units On
Top of Each Other
If the Switch units are free-standing, up to eight units can be placed one
on top of the other. If you are mixing a variety of SuperStack
®
units, the
smaller units must be positioned at the top.
If you are placing Switch units one on top of the other, you must use the
self-adhesive rubber feet supplied. Apply the feet to the underside of
each Switch, sticking one in the marked area at each corner. Place the
Switch units on top of each other, ensuring that the feet of the upper unit
sit fully on the lower unit.
The Power-up
Sequence
The following sections describe how to get your Switch 5500
powered-up and ready for operation.
Powering-up the
Switch 5500
Use 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 one minute.
Checking for Correct
Operation of LEDs
During the Power On Self Test, all ports on the Switch are disabled and
the LEDs light. The PWR LED will flash green during the POST.
When the POST has completed, check the PWR LED to make sure that
your Switch is operating correctly.
Table 10 shows possible colors for the
LED.
Table 10 PWR LED Colors
Color State
Green The Switch is powered-up and operating normally.
Red The Switch has failed its Power On Self Test (POST).
Yellow flashing Some ports have failed POST *
* In this event you can still use the Switch via the remaining ports that have passed the
POST.
Off The Switch is not receiving power.
DUA1715-0AAA02.book Page 30 Wednesday, March 23, 2005 11:17 AM