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Appendix B: Cabling and Pin Assignment
RJ-45
There are different grades, or categories, of twisted-pair cabling. Category 5 is the most
reliable and is highly recommended. Category 3 is a good second choice. Straight-
through cables are used for connecting computers’ NIC cards to a hub. Crossover cables
are used for connecting a hub to another hub. (The router provides a built-in uplink/normal
switch. Uplink mode is crossed internally, which allows you to link or connect hubs together
with a straight-through cable instead.)
A-1-1 RJ-45 pin assignment
There are 8 thin, color-coded wires inside, run from one end of the cable to the other. All
8 wires are used.
Table 0-1
RJ-45 Color Chart
Wire 1
White with an Orange
stripe
Wire 2 Orange
Wire 3 White with a Green Stripe
Wire 4 Blue
Wire 5 White with a Blue Stripe
Wire 6 Green
Wire 7 White with a Brown Stripe
Wire 8 Brown
Pin 1
*Note* To determine which wire is wire number 1, hold the cable so that the end of the
plastic RJ-45 tip (the part that goes into a wall jack first) is facing away from you. Face
the clip down so that the copper side faces up (the springy clip will now be facing the
floor), when looking down on the copper side, wire 1 is on the far left.
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