3com 4210 26-Port User Manual
28
C
HAPTER
2: I
NSTALLING
THE
S
WITCH
Table 13 PWR LED Colors
If there is evidence of a problem, see “Solving Problems Indicated by LEDs” on
page 52 for a list of suggested solutions.
page 52 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.
disconnecting mains power is by connecting or disconnecting the power cord.
Connecting a
Redundant Power
Supply
Redundant Power
Supply
The Switch 4210 26-port PWR has a -48V DC Redundant Power Supply socket.
WARNING: Only properly trained and qualified personnel should install the
Redundant Power Supply (RPS).
Redundant Power Supply (RPS).
WARNING: Make sure to read these instructions in conjunction with the RPS flyer
and the safety and installation instructions supplied with your RPS.
and the safety and installation instructions supplied with your RPS.
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 using the remaining ports that have passed the
POST.
Off
The Switch is not receiving power.