3com 3C16985B 用户手册
26
C
HAPTER
2: I
NSTALLING THE
S
WITCH
Choosing a Suitable
Site
Site
The Switch is suited for use in an office environment where it can be
mounted in a standard 19-inch equipment rack, or free standing.
Alternatively, the Switch can be rack-mounted in a wiring closet or
equipment room. A rack-mounting kit, containing two mounting
brackets and four screws, is supplied with the Switch.
mounted in a standard 19-inch equipment rack, or free standing.
Alternatively, the Switch can be rack-mounted in a wiring closet or
equipment room. A rack-mounting kit, containing two mounting
brackets and four screws, is supplied with the Switch.
When deciding where to position the Switch, ensure that:
■
You are able to meet the configuration rules detailed in
“Configuration Rules for Fast Ethernet” on page 21.
“Configuration Rules for Fast Ethernet” on page 21.
■
The Switch is accessible and cables can be connected easily.
■
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
■
Cabling is away from:
■
Sources of electrical noise such as radios, transmitters and
broadband amplifiers
broadband amplifiers
■
Power lines and fluorescent lighting fixtures
■
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. We recommend that you provide a minimum of
25mm (1in.) clearance.
side of the Switch. We recommend that you provide a minimum of
25mm (1in.) clearance.
■
No more than four Switch units are placed on top of one another, if
the units are free standing.
the units are free standing.
■
If used in an office environment, the switch is positioned so that any
noise from the fan is not disruptive.
noise from the fan is not disruptive.
1697ua.bk Page 26 Monday, December 3, 2001 11:31 AM