Cabling Pinouts (Ethernet UTP)
Pinouts for 10BASE-T and 100BASE-T:
10BASE-T & 100BASE-T both use 2 pairs of 4 Wires:
To connect two different devices a Straight-through Cable is used but to connect two similar devices Crossover Cable is used.
PC, ROUTERS & WAP's Ethernet Interface Transmits on Pin 1&2 and Receives at Pin 3&6
whereas
HUB & SWITCH Transmits at Pin 3&6 and Receives on Pin 1&2.
But if 2 PCs are connected then also they both will transmit at Pin 1&2 and receive at Pin 3&6. Hence a Straight-through cable won't work.
To connect two Similar devices we need a Straight Cable. But to connect two different devices we need a Crossover Cable.
Crossover cable will now be able to connect two PC by connecting PC 1's Pin 1-PC2's Pin 3 and lastly PC1's Pin 2-PC2's Pin 6.
Similarly to connect two Switch by connecting SW1's Pin3-SW2's Pin1 and lastly SW1's Pin6-SW2's Pin2.
Pinouts for 1000BASE-T:
1000BASE-T both uses all the 4 pairs of 8 Wires:
In 1000BASE-T CROSSOVER CABLE Pins 1,2,4&5 Transmits (TX) & Pins 3,6,7&8 Receives (RX)
Reference:
CCNA 200-301 OCG, Volume 1, Pg. 42,43,44,45,46 - Wendell Odom.
Last updated