Archive for the ‘Fibre Optic Standards’ Category

Fibre Optic Standards – Explained

Saturday, November 14th, 2009

Fibre Optic Standards Explained:

Several IEEE standards have been established for Ethernet over fibre optic media. 10BASE-FL, one of the standards defined by the IEEE, allows Ethernet to operate at 10 Mbps over fibre optic cable. 100BASE-FX and 100BASE-SX both allow Ethernet speeds of 100 Mbps. 100BASE-FX operates at higher wavelengths than 100BASE-SX and can also be used with single-mode fibre cable.100BASE-SX operates at a wavelength of 850 nm and can only be used with multimode cable. The newest standards-1000BASE-SX and 1000BASE-LX -define speeds of 1 Gigabit and distances up to 5 kilometres. Actual distances that can be achieved with Media Converters can be much higher.

Standard Multimode Single-Mode
10BASE-FL 850 nm/2 km 1310/1550 nm up to 100 km*
100BASE-FX 1310 nm/fdx 2 km 1310/1550 nm up to 100 km*
100BASE-SX 850 nm/300 m n/a
1000BASE-SX (62.5 µm) 850 nm/220 m n/a
1000BASE-SX (50 µm) 850 nm/550 m n/a
1000BASE-LX 1310 nm/550 m 1310 nm/5 km
1310 nm up to 30 km*
1550 nm up to 70 km*
* Not part of the relevant IEEE standard