3com 5500-EI Quick Setup Guide

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Connecting a Redundant Power Supply
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Figure 16   Fitting a rear rail bracket for rack-mounting
Insert the switch into the 19-inch rack and secure it with suitable screws 
(not provided). Ensure that the ventilation holes are not obstructed.
Connect the network cables.
Place a unit information label on the unit in an easily accessible position. 
The unit information label shows the switch’s:
3Com product name
3Com 3C number
Unique MAC address (Ethernet address)
Serial number
You may need this information if you contact 3Com for Technical 
Support.
Connecting a 
Redundant Power 
Supply
The Switch 5500 Family has a -48V DC Redundant Power Supply socket.
WARNING: Only properly trained and qualified personnel should install 
the 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.