Twisted Pair Rj45 Wiring Diagram. When you are doing the straight through wiring the cable pinout on the two ends of the cat5e cable should be the same. Rj45 is the common name but they can also be referred to as 8 position 8 contact or 8p8c.
Both standards specify the wiring schemes for the connection of twisted pair copper cable into eight position rj45 connectors and jacks for data transmission. Utp cables comes with eight wires small wires which are twisted in four pairs. The problem arrises when internal wiring using the 3rd bell wire causes interference this happens because the circuit is not ballanced the line pair coming in to your house is what we call twisted pair the two pairs cancel out any noise on the line when an extension is added internally the 3rd wire is required to make a lot of phones most modern dect phones dont.
Inside the cable there are 8 color coded wires twisted in the 4 pairs of wires and each pair has a common color theme.
Straight through termination crossover termination the colors of the twisted pair wires the colors include orange green red blue and white. The pairs feature blue orange green and brown colours. Twisted pair wiring is a strategy that uses a pair of wires which are twisted around each other to transmit data between two nodes. Two of them have been standardized by the ieee 8023 committee.