3com 140m Guía Del Usuario
Positioning Your OfficeConnect Switch
2-5
You also need a network operating system (for
example Windows
example Windows
®
‘95 or Novell Netware
®
) correctly
configured on your workstations.
Twisted Pair (TP) Cables
To connect your hubs and workstations to the switch,
you must use ‘Straight-through’ TP cable with RJ45
connectors (all OfficeConnect products with
10BASE-T and 100BASE-TX ports use RJ45 type
connectors). In special instances, you may need to use
‘Crossover’ TP cables. Your supplier should stock both
of these types of cable, and will advise you when you
need to use ‘Crossover’ cables.
you must use ‘Straight-through’ TP cable with RJ45
connectors (all OfficeConnect products with
10BASE-T and 100BASE-TX ports use RJ45 type
connectors). In special instances, you may need to use
‘Crossover’ TP cables. Your supplier should stock both
of these types of cable, and will advise you when you
need to use ‘Crossover’ cables.
A ‘Straight-through’ cable is one where the pins of
one connector are connected to the same pins of the
other connector. For examples of the pin wiring for
‘Straight-through’ and ‘Crossover’ cables, refer to
one connector are connected to the same pins of the
other connector. For examples of the pin wiring for
‘Straight-through’ and ‘Crossover’ cables, refer to
Cables can be shielded (screened) or unshielded; we
recommend that you use shielded (screened) cable.
100BASE-TX cable must be data grade (Category 5).
The maximum length you can use is 100m (328ft).
recommend that you use shielded (screened) cable.
100BASE-TX cable must be data grade (Category 5).
The maximum length you can use is 100m (328ft).
Positioning Your OfficeConnect Switch
When installing your OfficeConnect switch, ensure:
■
It is out of direct sunlight and away from sources
of heat.
of heat.
■
Cabling is away from power lines, fluorescent
lighting fixtures, and sources of electrical noise
such as radios, transmitters and broadband
amplifiers.
lighting fixtures, and sources of electrical noise
such as radios, transmitters and broadband
amplifiers.
■
Water or moisture cannot enter the case of the
unit.
unit.
■
Air flow around the unit and through the vents in
the side of the case is not restricted. We
recommend you provide a minimum of 25.4mm
(1in.) clearance.
the side of the case is not restricted. We
recommend you provide a minimum of 25.4mm
(1in.) clearance.