Rack-Mounting - 3Com 4900 (3C17700) Getting Started Manual

Rack-mounting

The air is as free from dust as possible.
The unit is installed in a clean, air conditioned environment.
No more than four 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.
The Switch is 1.5U and will fit in most standard 19-inch racks. However,
as each Switch requires a shelf or runner to support its weight, you may
need to allow a 2U space within the rack for each Switch.
WARNING: The Switch should only be used in a rack if it is mounted on
runners, a shelf, or a tray to support the weight. The rack-mount kits
alone are not sufficient to support the weight of the switch. The rack-
mount kits must not be used to suspend the Switch from under a table or
desk, or attach it to a wall.
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.
CAUTION: You must use a shelf or support that will not obstruct the air
flow through the side panels of the Switch.
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 securing bracket over the mounting holes on one side of the
Switch, as shown in
3 Insert the three screws and tighten with a suitable screwdriver.
Figure 9.
Rack-mounting 23