3Com 3C17400 User Manual - Page 23

Placing Units On Top of Each Other, The Power-up Sequence, Powering-up the Switch

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Placing Units On Top of Each Other 23 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 3Com Switch and Hub 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 pads supplied. Apply the pads 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 pads of the upper unit line up with the recesses of the lower unit. The Power-up Sequence The following sections describe how to get your Switch powered-up and ready for operation. Powering-up the Use the following sequence of steps to power-up the Switch. 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. 3 The Power LED lights green and the Self Test LED will flash green for approximately 30 seconds. 4 The Self Test LED will go off for 45 seconds. 5 When the unit is ready, the Self Test LED lights green. The Switch powers-up and runs through its Power On Self Test (POST), which takes approximately 60 seconds. Checking for Correct Operation of LEDs During the Power On Self Test, all ports on the Switch are disabled. When the POST has completed, check the Power and Self Test LEDs to make sure that your Switch is operating correctly. Table 6 shows possible colors for the LED. Table 6 Power LED colors Color Green Red Off State The Switch is powered-up and operating normally. The power supply has failed. The Switch is not receiving power.

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Placing Units On Top of Each Other
23
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 3Com Switch and Hub
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 pads supplied. Apply the pads 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 pads of the upper
unit line up with the recesses of the lower unit.
The Power-up
Sequence
The following sections describe how to get your Switch powered-up and
ready for operation.
Powering-up the
Switch
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.
3
The Power LED lights green and the Self Test LED will flash green for
approximately 30 seconds.
4
The Self Test LED will go off for 45 seconds.
5
When the unit is ready, the Self Test LED lights green.
The Switch powers-up and runs through its Power On Self Test (POST),
which takes approximately 60 seconds.
Checking for Correct
Operation of LEDs
During the Power On Self Test, all ports on the Switch are disabled. When
the POST has completed, check the Power and Self Test LEDs to make
sure that your Switch is operating correctly.
Table 6
shows possible colors
for the LED.
Table 6
Power LED colors
Color
State
Green
The Switch is powered-up and operating normally.
Red
The power supply has failed.
Off
The Switch is not receiving power.