Hub/Switch Installation Guide SMC6724L2

A BOUT THE T IGER S WITCH 10/100
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Description of Hardware
10BASE-T/100BASE-TX Ports (SMC6724L2)
These ports are dual-speed RJ-45 ports. Ports 1 through 23 are
labeled with an “x” to indicate that they have a built-in crossover
(MDI-X). Workstations and servers can be connected to these ports
with straight-through cable. Port 24 is switch-selectable (MDI-X or
MDI). There is an associated switch that is used to enable and
disable the crossover, so this port can always be connected to
another hub or switch with straight-through cable. When
connecting to another switch or a hub, you can also use
straight-through cable to connect any port on the switch to a port
on the attached device that does not have built-in wiring
crossovers (MDI), or use crossover cabling. (See Appendix B for a
pinout description of crossover cable.)
Each of these ports support auto-negotiation, so the optimum
transmission mode (half or full duplex), and data rate (10 or 100
Mbps) can be selected automatically. If a device connected to one
of these ports does not support auto-negotiation, the
communication mode of that port can be configured manually.
Each port also supports auto-negotiation of IEEE 802.3x
full-duplex flow control, so the switch can automatically prevent
port buffers from becoming saturated.