3Com SUPERSTACK 4226T - 10 BASE-T; 100 BASE-TX Ports; 10;100;1000 BASE-T Ports; GBIC Ports

14 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4200 SERIES
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.
Either shielded or unshielded data cables with shielded or unshielded
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.
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.
The 10/100/1000BASE-T ports will auto-negotiate to the appropriate
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.
DUA1730-0AAA04.book Page 14 Thursday, November 17, 2005 2:59 PM