3com 2816 User Guide
14
C
HAPTER
2: I
NSTALLING
THE
S
WITCH
Alternatively, the Switch can be rack-mounted in a
wiring closet or equipment room. A mounting kit,
containing two mounting brackets and four screws, is
supplied with the Switch.
wiring closet or equipment room. A mounting kit,
containing two mounting brackets and four screws, is
supplied with the Switch.
When deciding where to position the Switch, ensure
that:
that:
■
It is accessible and cables can be connected easily.
■
Cabling is away from sources of electrical noise.
These include lift shafts, microwave ovens, and air
conditioning units. Electromagnetic fields can
interfere with the signals on copper cabling and
introduce errors, therefore slowing down your
network.
These include lift shafts, microwave ovens, and air
conditioning units. Electromagnetic fields can
interfere with the signals on copper cabling and
introduce errors, therefore slowing down your
network.
■
Water or moisture cannot enter the case of the unit.
■
Air flow around the unit and through the vents in
the side of the case is not restricted (3Com
recommends that you provide a minimum of 25 mm
(1 in.) clearance).
the side of the case is not restricted (3Com
recommends that you provide a minimum of 25 mm
(1 in.) clearance).
■
The air is as free of dust as possible.
■
Temperature operating limits are not likely to be
exceeded. It is recommended that the unit is
installed in a clean, air conditioned environment.
exceeded. It is recommended that the unit is
installed in a clean, air conditioned environment.
It is always good practice to wear an anti-static wrist
strap when installing network equipment, connected to
a ground point. If one is not available, try to keep in
contact with a grounded rack and avoid touching the
unit's ports and connectors, if possible. Static discharge
can cause reliability problems in your equipment.
strap when installing network equipment, connected to
a ground point. If one is not available, try to keep in
contact with a grounded rack and avoid touching the
unit's ports and connectors, if possible. Static discharge
can cause reliability problems in your equipment.
Rack-Mounting or Free-Standing
The unit can be mounted in a 19-inch equipment rack
using the mounting kit or it can be free-standing. Do
not place objects on top of the unit or stack.
using the mounting kit or it can be free-standing. Do
not place objects on top of the unit or stack.
CAUTION: If installing the Switch in a free-standing
stack of different size Baseline or Superstack
stack of different size Baseline or Superstack
®
3 units,
the smaller units must be installed above the larger
ones. Do not have a free-standing stack of more than
six units.
ones. Do not have a free-standing stack of more than
six units.
Using the Mounting Kit
The Switch is supplied with two mounting brackets and
four screws. These are used for rack mounting the unit.
When mounting the unit, you should take note of the
guidelines given in “Positioning the Switch” on
page 13.
four screws. These are used for rack mounting the unit.
When mounting the unit, you should take note of the
guidelines given in “Positioning the Switch” on
page 13.
The Switch is 1U high and will fit in a standard 19-inch
rack.
rack.
CAUTION: Before continuing, disconnect all cables from
the unit. Remove the self-adhesive pads from the
underside of unit, if already fitted.
the unit. Remove the self-adhesive pads from the
underside of unit, if already fitted.
To rack-mount the Switch:
1
Place the unit the right way up on a hard, flat surface
with the front facing towards you.
with the front facing towards you.
2
Locate a mounting bracket over the mounting holes on
one side of the unit.
one side of the unit.