Definitions of pinning Ethernet

Few people know and find this stuff, but here's a simple explanation of how your network card works, so this way, you can create a crossover network cable or multiple cables to connect various peer-to-point without hub or switch specific.

Not to be confused pins, see the image to locate each pin:

Ethernet 10BaseT

#Pin	Signal Name	Function
1	TD+	Transmit Data (+)
2	TD-	Transmit Data (-)
3	RD+	Receive Data (+)
4	NC	Not Connected.
5	NC	Not Connected.
6	RD-	Receive Data (-)
7	NC	Not Connected..
8	NC	Not Connected..

See, if you are a simple electronic technician, you already know how to make a cable to connect multiple computers without a hub or switch (a router maybe yes, since he is responsible for forwarding packets to other networks such as the LAN to the internet).

A twisted pair cable type cross-over, you just reverse the data transmission with the pins that receive data (not reversing the polarity) and you create a useful cable for connecting computers, be they cross-over or straight (same pinout on both sides).

For those who want more adrenaline, here is the pinout for the Ethernet 1000Base T (1 Gbps).

Ethernet 1000BaseT

Pin #	Signal Name	Function
1	BI_DA+	Bi-directional +A
2	BI_DA-	Bi-directional -A
3	BI_DB+	Bi-directional +B
4	BI_DC+	Bi-directional +C
5	BI_DC-	Bi-directional -C
6	BI_DB-	Bi-directional Bi-
7	BI_DD+	Bi-directional +D
8	BI_DD-	Bi-directional -D

Here are the definitions of networks. Hope you enjoy and use this information, as I'm enjoying myself!

Source: http://www.interfacebus.com/Gigabit_Ethernet_Description.html

*This page was translated from portuguese to english by Google Translator with fast review by Aristóteles Machado.