Gigabit Ethernet Cabling

Gigabit Ethernet can be deployed using both copper wires and fiber optic cables. Since they target to achieve data rates of 1 gigabit per second (1 Gbps), they require encoding – decoding a bit within a nanosecond. This was achieved first in the 1000BASE-CX version.

Cabling in Common Varieties of Gigabit Ethernet

The popular varieties of fast Ethernet are 1000Base-SX, 1000Base-LX, 1000BASE-T and 1000Base-CX.

Cabling in 1000BASE-T

  • Uses four pairs of unshielded twisted pair (UTP) cables

  • Generally uses Category 5/5e UTP, but can also use Category 6 and Category 7

  • Maximum segment length is 100 meters

Cabling in 1000BASE-CX

  • Uses shielded twisted-pair cables (STP) with DE-9 or 8P8C connector

  • Uses 2 pairs of STP

  • Maximum segment length is 25 meters

Cabling in 1000BASE-SX

  • Uses a pair of fiber optic cables of a shorter wavelength having 770 – 860 nm diameter

  • The maximum segment length varies from 220 – 550 meters depending upon the fiber properties.

  • Uses multimode fibers

Cabling in 1000BASE-LX

  • Uses a pair of fiber optic cables of a longer wavelength having 1270 – 1355 nm diameter

  • Maximum segment length is 500 meters

  • Can cover distances up to 5 km

  • Uses both single-mode and multimode fibers