Publication date: Nov, 2014
Revision A1.1
30
N
OTE
:
The “+” and “-” signs represent the polarity of the wires
that make up each wire pair.
STRAIGHT-
THROUGH
WIRING
If the twisted-pair cable is to join two ports and only one of the
ports has an internal crossover (MDI-X), the two pairs of wires
must be straight-through. (When auto-negotiation is enabled for
any RJ-45 port on this switch, you can use either
straight-through or crossover cable to connect to any device
type.)
You must connect all four wire pairs as shown in the following
diagram to support Gigabit Ethernet.
Figure 20: Straight-through Wiring
EIA/TIA 568B RJ-45 Wiring Standard
10/100BASE-TX Straight-through Cable
CROSSOVER
WIRING
If the twisted-pair cable is to join two ports and either both ports
are labeled with an “X” (MDI-X) or neither port is labeled with an
“X” (MDI), a crossover must be implemented in the wiring. (When
auto-negotiation is enabled for any RJ-45 port on this switch, you
can use either straight-through or crossover cable to connect to
any device type.)
You must connect all four wire pairs as shown in the following
diagram to support Gigabit Ethernet.
Figure 21: Crossover Wiring
EIA/TIA 568B RJ-45 Wiring Standard
10/100BASE-TX Crossover Cable
