Straight-Through Wiring; Crossover Wiring - Enterasys RoamAbout RBT-4102 Installation Manual

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.
End A

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.
End A
EIA/TIA 568B RJ-45 Wiring Standard
10/100BASE-TX Straight-through Cable
White/Orange Stripe
Orange
White/Green Stripe
1
2
Blue
3
4
White/Blue Stripe
5
6
Green
7
8
White/Brown Stripe
Brown
EIA/TIA 568B RJ-45 Wiring Standard
10/100BASE-TX Crossover Cable
White/Orange Stripe
Orange
White/Green Stripe
1
2
Blue
3
4
White/Blue Stripe
5
6
Green
7
8
White/Brown Stripe
Brown
Twisted-Pair Cable Assignments
1
2
End B
3
4
5
6
7
8
1
2
End B
3
4
5
6
7
8
B-3