Kiegészítve: 2013.04.10. GJ

UTP kábel bekötései

RJ45 (Twisted pair networking)
Pin	Wall socket	Function -	Function -           MIDX socket
	wire colour	MDI devices	MDIX devices         wire colour

Pin 1	White/Orange	TX+		RX+                  White/green 
Pin 2	Orange		TX-		RX-                  Green

Pin 3	White/Green	RX+		TX+                  White/Orange
Pin 6	Green		RX-		TX-                  Orange

Pin 4	Blue		BD3+		BD4+                 White/Brown
Pin 5	White/Blue	BD3-		BD4-                 Brown

Pin 7	White/Brown	BD4+		BD3+                 Blue
Pin 8	Brown		BD4-		BD3-                 White/Blue

Pins 1,2,3,6 are used in 10BaseT (10Mb/s) and 100BaseT (100Mb/s) networking.
All pins are used in 1000BaseT (1000Mb/s) networking.

TX = Transmit	RX = Receive	BD = Bidirectional

Workstation network cards are MDI devices. Hubs are MDIX (crossover) devices.
To connect PCs and hubs together use straight-through wiring.
To connect e.g. two hubs or two PCs together use cross-over wiring (many hubs have a 
port which can be switched between MDI and MDIX).