Chapter 9. Gigabit Ethernet Physical Layer

Four standardized physical implementations of Gigabit Ethernet exist:

  • 1000BASE-SX— A fiber optic implementation for a pair of multimode fibers. SX corresponds to short wavelength. Lasers transmitting light at a wavelength of 850 nanometers (nm) are used.

  • 1000BASE-LX— A fiber optic implementation for a pair of single-mode or multimode fibers. LX corresponds to long wavelength. Lasers transmitting light at a wavelength of 1300nm are used.

  • 1000BASE-CX— A short shielded copper cable used in wiring closets and equipment rooms. CX corresponds to copper

  • 1000BASE-T— An unshielded twisted-pair implementation that operates across four pairs of Category 5 twisted-pair cabling.

The first three were developed ...

Get Local Area High Speed Networks now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.