Cables and Pinouts
B-2
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.
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.
Table B-1. 10/100BASE-TX MDI and MDI-X Port Pinouts
Pin
MDI-X Signal Name
MDI Signal Name
1
Receive Data plus (RD+)
Transmit Data plus (TD+)
2
Receive Data minus (RD-)
Transmit Data minus (TD-)
3
Transmit Data plus (TD+)
Receive Data plus (RD+)
6
Transmit Data minus (TD-)
Receive Data minus (RD-)
4,5,7,8
Not used
Not used
Note: The “+” and “-” signs represent the polarity of the wires that make
up each wire pair.
White/Orange Stripe
Orange
White/Green Stripe
Green
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
EIA/TIA 56
8
B RJ-45 Wiring Standard
1
0/
1
00BASE-TX Straight-through Cable
End A
End B
Blue
White/Blue Stripe
Brown
White/Brown Stripe
White/Orange Stripe
Orange
White/Green Stripe
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
EIA/TIA 56
8
B RJ-45 Wiring Standard
1
0/
1
00BASE-TX Crossover Cable
End A
End B
Green
Blue
White/Blue Stripe
Brown
White/Brown Stripe
Summary of Contents for SMCWTVG
Page 6: ...iv Contents ...
Page 12: ...Introduction 1 6 ...
Page 20: ...Troubleshooting A 2 ...
Page 24: ...Cables and Pinouts B 4 ...
Page 29: ......
Page 30: ...Model Number SMCWTVG Pub Number 150200025700E E032006 R02 ...