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CHAPTER B |
Cables
Twisted-Pair Cable and Pin
Assignments
Figure 26: Straight-through Wiring
EIA/TIA 568B RJ-45 W
iring
Standard
10
/
100
BASE-TX Straight-through Cable
W
hi
t
e
/Or
ange
Stripe
1
End
A
2
3
4
5
6
7
8
Orange
Whi
t
e
/
Green
Stripe
Blue
Whi
t
e/Blue
S
t
ripe
Green
Whi
t
e
/
Brown
S
t
ripe
1
2
End
B
3
4
5
6
7
8
Brown
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 27: Crossover Wiring
EIA/TIA 568B RJ-45 W
iring
Standard
10
/
100
BASE-TX
Crossover
Cable
Whi
t
e
/
Orange
S
t
ripe
1
End
A
2
3
4
5
6
7
8
Orange
Whi
t
e
/
Green
Stripe
Blue
Whi
t
e/Blue
S
t
ripe
Green
Whi
t
e
/
Brown
S
t
ripe
1
2
End
B
3
4
5
6
7
8
Brown
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