1000BASE-T is a 1-Gbps Ethernet physical-layer standard that sends data over all four pairs—eight wires—of a copper UTP cable. section 3.3.2 section 3.5
Key cabling points:
- Uses an 8P8C connector, commonly called RJ45, and supports a maximum UTP cable length of 100 meters. section 3.5
- Unlike 10BASE-T and 100BASE-T, it uses every wire pair; Figure 3.7 shows the eight wires involved. section 3.3.2
- Auto MDI-X can adjust transmit and receive pin usage, reducing concern about choosing straight-through or crossover cabling. section 3.5
Figure 3.7 Pin and wire pairs used on 1000BASE-T and 10GBASE-T connections. All eight wires of the cable are used.
Inspect the pin and wire-pair layout used by 1000BASE-T connections. section 3.3.2
