The Power-Up Sequence; Powering-Up The Switch 4950; Checking For Correct Operation Of Leds; Connecting A Redundant Power System - 3Com SuperStack 3 4950 Getting Started Manual

The Power-up
Sequence
Powering-up the
Switch 4950
Checking for Correct
Operation of LEDs
Connecting a
Redundant Power
System
The following sections describe how to get your Switch 4950
powered-up and ready for operation.
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.
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.
for the LED.
Table 7 Power/Self Test LED Colors
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.
If there is evidence of a problem, see
LEDs" on page 40
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).
"Solving Problems Indicated by
for a list of suggested solutions.

The Power-up Sequence

Table 7 shows possible colors
23