3Com 3CR17660-91 manual Rack-mounting, Inch racks, To rack-mount your Switch, Facing towards you

Rack-mounting 23

■ 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 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.
Rack-mounting	The Switch 4200G is 1 rack unit (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 5.

You can also rack mount your Switch using the mounting holes at the rear of the Switch.