TIA-568 (T568A / T568B)

RJ45 8P8C Modular Ethernet Pinout (T568A / T568B Standard)

The eight-position modular jack carries four twisted pairs. Select a contact to see its T568A and T568B wire colour, the contact it is twisted with and how Ethernet and PoE use the pair.

Pin assignment

Pin 1: White/Orange (T568B)1Pin 2: Orange (T568B)2Pin 3: White/Green (T568B)3Pin 4: Blue (T568B)4Pin 5: White/Blue (T568B)5Pin 6: Green (T568B)6Pin 7: White/Brown (T568B)7Pin 8: Brown (T568B)8Pin 1: White/Orange (T568B)1Pin 2: Orange (T568B)2Pin 3: White/Green (T568B)3Pin 4: Blue (T568B)4Pin 5: White/Blue (T568B)5Pin 6: Green (T568B)6Pin 7: White/Brown (T568B)7Pin 8: Brown (T568B)8
  • Ethernet pairs

Schematic face view, not to scale · numbering per TIA-568 (T568A / T568B)

Pin assignment of RJ45 8P8C Ethernet Connector
PinSignalFunctionStatus
White/Orange (T568B)T568A: white/green. Twisted with pin 2: a data pair in 10/100BASE-T and bidirectional in 1000BASE-T; PoE can be applied across pins 1–2 and 3–6Standard
Orange (T568B)T568A: green. Twisted with pin 1: a data pair in 10/100BASE-T and bidirectional in 1000BASE-T; PoE can be applied across pins 1–2 and 3–6Standard
White/Green (T568B)T568A: white/orange. Twisted with pin 6: a data pair in 10/100BASE-T and bidirectional in 1000BASE-T; PoE can be applied across pins 1–2 and 3–6Standard
Blue (T568B)T568A: blue. Twisted with pin 5: a spare pair in 10/100BASE-T and bidirectional in 1000BASE-T; PoE can be applied across pins 4–5 and 7–8Standard
White/Blue (T568B)T568A: white/blue. Twisted with pin 4: a spare pair in 10/100BASE-T and bidirectional in 1000BASE-T; PoE can be applied across pins 4–5 and 7–8Standard
Green (T568B)T568A: orange. Twisted with pin 3: a data pair in 10/100BASE-T and bidirectional in 1000BASE-T; PoE can be applied across pins 1–2 and 3–6Standard
White/Brown (T568B)T568A: white/brown. Twisted with pin 8: a spare pair in 10/100BASE-T and bidirectional in 1000BASE-T; PoE can be applied across pins 4–5 and 7–8Standard
Brown (T568B)T568A: brown. Twisted with pin 7: a spare pair in 10/100BASE-T and bidirectional in 1000BASE-T; PoE can be applied across pins 4–5 and 7–8Standard

Pin details

Select a pin on the diagram or table for full details.

Pin details

About this connector

Eight-position modular Ethernet connector showing the standardized twisted-pair assignments used by T568 wiring.

Specifications

Standard
8P8C Modular Jack
Positions
8

Primary sources

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