Rack-mounting 23
■ sources of electrical noise such as radios, transmitters and
broadband amplifiers.
■ power lines and fluorescent lighting fixtures
■ The Switch is accessible and cables can be connected easily.
■ Water or moisture cannot enter the case of the Switch.
■ Air flow is not restricted around the Switch or through the vents in the
side of the Switch. 3Com recommends that you provide a minimum of
25mm (1in.) clearance.
■ Air temperature around the Switch does not exceed 40 °C (104 °F).
If the Switch is installed in a 19-inch rack or closed assembly its local air
temperature may be greater than room ambient temperature.
■ The air is as free from dust as possible.
■ The unit is installed in a clean, air conditioned environment.
■ No more than eight Switch units are placed on top of one another, if
the units are free-standing.
■ The Switch is situated away from sources of conductive (electrical)
dust, for example laser printers.
■ The AC supply used by the Switch is separate to that used by units
that generate high levels of AC noise, for example air conditioning
units and laser printers.
Rack-mounting The Switch 5500 is 1U high and will fit in most standard 19-inch racks.
CAUTION: Disconnect all cables from the Switch before continuing.
Remove all self adhesive pads from the underside of the Switch if they
have been fitted.
To rack-mount your Switch:
1 Place the Switch the right way up on a hard flat surface, with the front
facing towards you.
2 Locate a mounting bracket over the mounting holes on one side of the
front of the Switch, as shown in Figure 4
.
You can also rack mount your Switch using the mounting holes at the
rear of the Switch.
DUA1715-0AAA02.book Page 23 Wednesday, March 23, 2005 11:17 AM
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