BayStack 450 10/100/1000 Series Switches
309978-D Rev 01 1-5
The 10BASE-T/100BASE-TX port connectors are configured as MDI-X
(media-dependent interface-crossover). These ports connect over straight cables to
the network interface controller (NIC) card in a node or server, similar to a
conventional Ethernet repeater hub. If you are connecting to an Ethernet hub or
Ethernet switch, you need a crossover cable unless an MDI connection exists on
the associated port of the attached device (see “
MDI and MDI-X Devices” on
page F-2).
Your BayStack 450-24T and BayStack 450-12T switches use autosensing ports
that are designed to operate at 10 Mb/s or at 100 Mb/s, depending on the
connecting device. These ports support the IEEE 802.3u autonegotiation standard,
which means that when a port is connected to another device that also supports the
IEEE 802.3u standard, the two devices negotiate the best speed and duplex mode.
The 10BASE-T/100BASE-TX RJ-45 switch ports also support half- and
full-duplex mode operation, and can connect to 10 Mb/s or 100 Mb/s Ethernet
segments or nodes (see “
Connecting the 10BASE-T/100BASE-TX Ports” on
page 2-8).
See Appendix F, “Connectors and Pin Assignments,” for more information about
the RJ-45 port connectors.
100BASE-FX MT-RJ Ports
Your BayStack 450-12F switch uses longwave 1300 nanometer (nm) MT-RJ port
connectors to attach devices over 62.5/125 or 50/125 micron multimode fiber
optic cable.
BayStack 450-12F switches conform to the IEEE 802.3u 100BASE-FX standard
and can be used for fiber-based 100 Mb/s connections (2 km/1.2 mi maximum
distance) to other compatible Fast Ethernet devices. Single-mode fiber cable is not
supported.
Note: Use only Category 5 copper unshielded twisted pair (UTP) cable
connections when connecting 10BASE-T/100BASE-TX ports.
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