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Ethernet 100Base-T4 crossover cable pinout

network cable scheme

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8 pin RJ45 (8P8C) male connector layout
8 pin RJ45 (8P8C) male connector
at the network interface card 1

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.

Name Pin Pin Name
TX_D1+13RX_D2+
TX_D1-26RX_D2-
RX_D2+31TX_D1+
RX_D2-62TX_D1-
BI_D3+47BI_D4+
BI_D3-58BI_D4-
BI_D4+74BI_D3+
BI_D4-85BI_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).

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8 pin RJ45 (8P8C) male connector layout
8 pin RJ45 (8P8C) male connector
at the network interface card 2
Pinouts.ru > Network cables schematic pinouts listing > Pinout of Ethernet 100Base-T4 crossover cable and layout of 8 pin RJ45 (8P8C) male connector and 8 pin RJ45 (8P8C) male connector
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Source(s) of this and additional information: Hardware Book, Kim Scholte
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Last updated 2008-06-28 21:56:54. Edit this page. Is this document correct or incorrect? What is your opinion?
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