A serial connector which looks very much like a standard telephone connector, except it houses eight wires instead of four. RJ-45s are typically found on computers either integrated into the mother board or on a NIC. Because they are so small they are often used on devices such as {terminal servers} that have many {ports}. Ethernet (10baseT) and Token Ring sometimes use four wires of an RJ-45 plug, 100baseVG uses all eight. 100BaseTX uses the same four wires of the RJ-45 connector as 10baseT but the wire must be category 5 instead of {category 3}. [Would the cable normally be shielded twisted pair or unshielded twisted pair?] (2004-05-22)
