Ethernet 100Base-T4 pinout

network connector

8 pin RJ45 (8P8C) female connector layout

8 pin RJ45 (8P8C) female connector
at the network interface cards/hubs

Pin	Name	Description
1	TX_D1+	Tranceive Data+
2	TX_D1-	Tranceive Data-
3	RX_D2+	Receive Data+
4	BI_D3+	Bi-directional Data+
5	BI_D3-	Bi-directional Data-
6	RX_D2-	Receive Data-
7	BI_D4+	Bi-directional Data+
8	BI_D4-	Bi-directional Data-

One pair is reserved for transmit, one for receive, and the remaining two will switch direction as negotiated.

Note: TX & RX are swapped on Hub´s. Don´t know about Bi-directional data

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8 pin RJ45 (8P8C) male connector diagram

8 pin RJ45 (8P8C) male connector
at the cables

Pinouts.ru > Network hardware interfaces pinouts listing > Pinout of Ethernet 100Base-T4 and layout of 8 pin RJ45 (8P8C) female connector and 8 pin RJ45 (8P8C) male connector	Document status:	correct
Source(s) of this and additional information: Hardware Book, Kim Scholte	1 reports
Last updated at Sun May 13 2007. Submit additions or corrections for this document.	Is this document correct or incorrect? What is your opinion?

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