3Com SuperStack 3 4950, Руководство по началу работы

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The Power-up Sequence 23
The Power-up
Sequence
The following sections describe how to get your Switch 4950
powered-up and ready for operation.
Powering-up the
Switch 4950
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 10 seconds.
Checking for Correct
Operation of LEDs
During the Power On Self Test, all ports on the Switch are disabled and
the LEDs light in a rapid sequence.
When the POST has completed, check the Power/Self Test LED to make
sure that your Switch is operating correctly.
Table 7 shows possible colors
for the LED.
Table 7 Power/Self Test LED Colors
If there is evidence of a problem, see “Solving Problems Indicated by
LEDs” on page 40 for a list of suggested solutions.
Connecting a
Redundant Power
System
You can connect a SuperStack 3 Advanced Redundant Power System to
the Switch. This unit, which is also known as an RPS, is designed to
maintain the power to your Switch if a power supply failure occurs.
For normal redundancy, the unit requires one Type 3 Power Module (part
number 3C16075).
For full redundancy, the unit requires two Type 3 Power Modules
combined using a Type 3 Y-Cable (part number 3C16077).
Color State
Green The Switch is powered-up and operating
normally.
Yellow The Switch has failed its Power On Self Test
(POST) because of an internal problem.
Off The Switch is not receiving power.