# Ethernet 10/100/1000Base-T Straight Thru

Wiring scheme: EIA/TIA 568B

This cable will work with 10Base-T, 100Base-TX and 1000Base-T and is used to connect a network interface card to a hub or network outlet. These cables are sometimes called "whips".

Note: While 10BaseT and 100Base-TX only uses two pairs, please do connect all pairs since 1000BaseT uses all of them, and save yourself some future debugging :)

(To network interface card).
(To hub).

RJ45 MALE CONNECTOR to network interface card).
RJ45 MALE CONNECTOR to hub).

Name | Pin | Cable Color | Pin | Name
--- | --- | --- | --- | ---
TX+ | 1 | White/Orange | 1 | TX+
TX- | 2 | Orange | 2 | TX-
RX+ | 3 | White/Green | 3 | RX+
| 4 | Blue | 4 |
| 5 | White/Blue | 5 |
RX- | 6 | Green | 6 | RX-
| 7 | White/Brown | 7 |
| 8 | Brown | 8 |

Note: It's important that each pair is kept as a pair. TX+ & TX- must be in the pair, and RX+ & RX- must together in another pair. (Just as the table above shows).

Just for your information, this is how the pairs are named:

Pair | Pins | Common color
--- | --- | ---
1 | 4 & 5 | Blue
2 | 1 & 2 | Orange
3 | 3 & 6 | Green
4 | 7 & 8 | Brown

The + side of each pair is called the "tip" and the - side is called the "ring", a reference to old telephone connectors.

Contributor: Joakim Ögren, Oscar Fernandez Sierra, Jeffrey R. Broido

Source:
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May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2001-06-07