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5-2 © 2003 Foundry Networks, Inc. February 2003
crossover — known as fixed crossover (MDI-X) ports — so that
they can be connected to PCs and servers using standard
straight-through cable. Some switches and hubs also have an
MDI port, so that they can connect to another switch’s/hub’s
MDI-X port using straight-through cable. To connect between
two switches/hubs that only have fixed MDI-X ports, the wiring
crossover must be implemented in the cable — known as a
crossover cable.
The RJ-45 ports on the switch base unit support automatic MDI/
MDI-X operation, which means that they automatically detect the
wiring in the link and configure as MDI or MDI-X accordingly. So
for these ports, you can use standard straight-through
twisted-pair cables to connect to any other network device (PCs,
servers, switches, hubs, or routers). However, note that
auto-negotiation must be enabled on these ports for automatic
wiring configuration to function properly.
Connecting to PCs, Servers, Hubs and Switches
&DXWLRQ Do not plug a phone jack connector into an RJ-45 port. This
will damage the switch. Use only twisted-pair cables with
RJ-45 connectors that conform to FCC standards.
1. Attach one end of a twisted-pair cable segment to the device’s
RJ-45 connector.