3Com 3CR17561-91-US Getting Started Guide - Page 35

The Power-up Sequence, Powering-up the Switch 4500, Checking for Correct Operation of LEDs - ends

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The Power-up Sequence 35 The Power-up Sequence The following sections describe how to get your Switch 4500 powered-up and ready for operation. Powering-up the Use the following sequence of steps to power-up the Switch. Switch 4500 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 During the Power On Self Test, all ports on the Switch are disabled and Operation of LEDs 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 12 shows possible colors for the LED. Table 12 Unit Status Colors Color Green Green flashing Red Off State The Switch is powered-up and operating normally. Self Test (POST) or Software Download is in progress The Switch has failed its Power On Self Test (POST). The Switch is not receiving power. If there is evidence of a problem, see "Solving Problems Indicated by LEDs" on page 68 for a list of suggested solutions. CAUTION: The Switch has no ON/OFF switch; the only method of connecting or disconnecting mains power is by connecting or disconnecting the power cord. Choosing the Correct Cables All of the ports on the Switch are Auto-MDIX, that is they have a cross-over capability. These ports can automatically detect whether to operate in MDI or MDIX mode. Therefore you can make a connection to one of the ports with a straight-through (MDI) or a cross-over cable (MDIX).

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The Power-up Sequence
35
The Power-up
Sequence
The following sections describe how to get your Switch 4500
powered-up and ready for operation.
Powering-up the
Switch 4500
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 12 shows possible colors for the
LED.
Table 12
Unit Status Colors
If there is evidence of a problem, see “Solving Problems Indicated by
LEDs” on page 68 for a list of suggested solutions.
CAUTION:
The Switch has no ON/OFF switch; the only method of
connecting or disconnecting mains power is by connecting or
disconnecting the power cord.
Choosing the Correct
Cables
All of the ports on the Switch are Auto-MDIX, that is they have a
cross-over capability. These ports can automatically detect whether to
operate in MDI or MDIX mode. Therefore you can make a connection to
one of the ports with a straight-through (MDI) or a cross-over cable
(MDIX).
Color
State
Green
The Switch is powered-up and operating normally.
Green flashing
Self Test (POST) or Software Download is in progress
Red
The Switch has failed its Power On Self Test (POST).
Off
The Switch is not receiving power.