3com 4228G User Manual
14
C
HAPTER
1: I
NTRODUCING
THE
S
UPER
S
TACK
3 S
WITCH
4200 S
ERIES
WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot
be used as standard traditional telephone sockets, or to connect the unit to a
traditional PBX or public telephone network. Only connect RJ-45 data
connectors, network telephony systems, or network telephones to these
sockets.
be used as standard traditional telephone sockets, or to connect the unit to a
traditional PBX or public telephone network. Only connect RJ-45 data
connectors, network telephony systems, or network telephones to these
sockets.
Either shielded or unshielded data cables with shielded or unshielded
jacks can be connected to these data sockets.
jacks can be connected to these data sockets.
10BASE-T/
100BASE-TX Ports
The Switch has 24 or 48 auto-negotiating 10BASE-T/100BASE-TX ports
configured as Auto MDIX (cross-over). While auto-negotiation is enabled,
these ports can automatically detect whether they need to operate in
MDI or MDIX mode. Alternatively, you can manually set these ports to
10BASE-T half duplex, 10BASE-T full duplex, 100BASE-TX half duplex or
100BASE-TX full duplex. The maximum segment length is 100 m (328 ft)
over Category 5 twisted pair cable.
configured as Auto MDIX (cross-over). While auto-negotiation is enabled,
these ports can automatically detect whether they need to operate in
MDI or MDIX mode. Alternatively, you can manually set these ports to
10BASE-T half duplex, 10BASE-T full duplex, 100BASE-TX half duplex or
100BASE-TX full duplex. The maximum segment length is 100 m (328 ft)
over Category 5 twisted pair cable.
10/100/1000BASE-T
Ports
The Switch has two auto-negotiating 10/100/1000BASE-T ports
configured as Auto MDIX (cross-over). While auto-negotiation is enabled,
these ports can automatically detect whether they need to operate in
MDI or MDIX mode. These ports provide 10/100/1000 Mbps full duplex
connections to other Gigabit Ethernet devices. Full duplex allows packets
to be transmitted and received simultaneously which, in effect, doubles
the potential throughput of a link. These ports require either
straight-through or cross-over Category 5 cables with RJ-45 connectors at
both ends. The maximum UTP cable length is 100 m (328 ft) over
Category 5 cable.
configured as Auto MDIX (cross-over). While auto-negotiation is enabled,
these ports can automatically detect whether they need to operate in
MDI or MDIX mode. These ports provide 10/100/1000 Mbps full duplex
connections to other Gigabit Ethernet devices. Full duplex allows packets
to be transmitted and received simultaneously which, in effect, doubles
the potential throughput of a link. These ports require either
straight-through or cross-over Category 5 cables with RJ-45 connectors at
both ends. The maximum UTP cable length is 100 m (328 ft) over
Category 5 cable.
The 10/100/1000BASE-T ports will auto-negotiate to the appropriate
speed.
speed.
GBIC Ports
This section applies to the SuperStack 3 Switch 4228G only.
The two GBIC ports support Category 5 twisted pair cable and fiber
Gigabit Ethernet short-wave (SX), long-wave (LX) and long-haul (LH70)
GBIC transceivers in any combination. This offers you the flexibility of
using GBIC transceivers to provide connectivity between the Switch and
remote 1000 Mbps workgroups or to create a high capacity aggregated
link backbone connection.
Gigabit Ethernet short-wave (SX), long-wave (LX) and long-haul (LH70)
GBIC transceivers in any combination. This offers you the flexibility of
using GBIC transceivers to provide connectivity between the Switch and
remote 1000 Mbps workgroups or to create a high capacity aggregated
link backbone connection.
DUA1730-0AAA04.book Page 14 Thursday, November 17, 2005 2:59 PM