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34 CHAPTER 2: INSTALLING THE SWITCH
network cable is required to provide both power and network
connectivity.
■ Increased Reliability — a device powered by a PoE Switch will be
able to take advantage of the facilities available to the Switch. The
Switch can be fitted with a redundant power supply or uninterruptible
power supply, increasing its uptime.
The Switch supports resistor detection according to IEEE 802.3af and
pre-standard detection methods.
The Switch 4500 supports 3Com 802.3af equipment. For the latest list of
supported devices, refer to the product page on the 3Com web site at
http://www.3com.com/
For further information on Power over Ethernet, refer to the Power over
Ethernet Configuration chapter in the Configuration Guide supplied on
the CD-ROM that accompanies your Switch 4500. Power over Ethernet
management is available using the web interface or the command line
interface (CLI).
Placing Units On
Top of Each Other
If the Switch units are free-standing, up to eight units can be placed one
on top of the other. If you are mixing a variety of SuperStack
®
units, the
smaller units must be positioned at the top.
If you are placing Switch units one on top of the other, you must use the
self-adhesive rubber feet supplied. Apply the feet to the underside of
each Switch, sticking one in the marked area at each corner. Place the
Switch units on top of each other, ensuring that the feet of the upper unit
sit fully on the lower unit.