Wiring:
We have different physical media(Coaxial,STP,UTP and Optical Fiber) to implement Ethernet technology. But nowadays we mostly use UTP and Optical.
In UTP, we use RJ-45 connector and Category 5/5e cable for wiring the devices.
RJ-45 Pinouts with Four-Pair UTP Cabling:
The most popular standards (10BASE-T and 100BASE-TX) each use 2 twisted pairs (specifically pairs 2 and 3 from above figure),with one pair used for transmission in each direction
Ethernet Cabling Types:
Points to Remember:
We have different physical media(Coaxial,STP,UTP and Optical Fiber) to implement Ethernet technology. But nowadays we mostly use UTP and Optical.
In UTP, we use RJ-45 connector and Category 5/5e cable for wiring the devices.
RJ-45 Pinouts with Four-Pair UTP Cabling:
Ethernet Cabling Types:
Type Of Cable | Pinouts | Key Pins Connected |
Straight – through | T568A (both ends) or T568b (both ends) | 1-1;2-2;3-3;6-6 |
Cross –over | T568A on one end, T568B on the other | 1-3;2-6;3-1;6-2 |
Points to Remember:
- Eventhough we have 4 pairs, we use only 2 pairs. One pair for transmission and another for reception.
- For Ex: A PC NIC transmits on pair 1,2 and receives on pair 3,6 ; But switch do the opposite. So a Straight-through cable works well.
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