3com 3CR17662-91 用户手册
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.
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.
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 units are free-standing.
■
The Switch is situated away from sources of conductive (electrical)
dust, for example laser printers.
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.
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.
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.
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.
rear of the Switch.
10014914AA.book Page 23 Friday, July 7, 2006 2:08 PM