RJ-45

RJ-45

(hardware)A serial connector which looks very much like astandard telephone connector, except it houses eight wiresinstead of four.

RJ-45s are typically found on computers either integratedinto the mother board or on a NIC. Because they are sosmall they are often used on devices such as terminal servers that have many ports.

Ethernet (10baseT) and Token Ring sometimes use fourwires of an RJ-45 plug, 100baseVG uses all eight.100BaseTX uses the same four wires of the RJ-45 connector as10baseT but the wire must be category 5 instead of category 3.

RJ-45

(Registered Jack-45) A common data networking interface that employs a cable of twisted wire pairs and an 8-pin modular jack. RJ-45 is used for Ethernet and Type 3 Token Ring networks. See cable categories and RJ-48.

RJ-45 Connectors
Eight-wire RJ-45 connectors are used with Ethernet and Type 3 Token Ring networks.

Variations of RJ-45
These are the variations of RJ-45 pins and wire colors.