Pinouts of Connectors

Ethernet 100Base-T4 Crossover cable pinout

layout
schematic diagram
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This cable can be used to connect two computers together without a hub, or to connect two hubs together (without using an uplink port). If you´re connecting two hubs together and one of them has an uplink port, use a straight cable.

8 pin RJ45 MALE connector pin-out & layout
8 pin RJ45 MALE connector  to the network interface card 1
Name Pin Pin Name
TX_D1+ 1 3 RX_D2+
TX_D1- 2 6 RX_D2-
RX_D2+ 3 1 TX_D1+
RX_D2- 6 2 TX_D1-
BI_D3+ 4 7 BI_D4+
BI_D3- 5 8 BI_D4-
BI_D4+ 7 4 BI_D3+
BI_D4- 8 5 BI_D3-
There are 2 types of cross-cables:

Note 1: 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 etc. (Just as the table above shows).

8 pin RJ45 MALE connector pin-outs & layouts
8 pin RJ45 MALE connector  to the network interface card 2
Pinouts.ru > Pinouts and schemes of cables for local networks >  Pinout of Ethernet 100Base-T4 Crossover cable and layout of 8 pin RJ45 MALE connector and 8 pin RJ45 MALE connector

Source(s): Hardware Book, Kim Scholte
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