1000Base-ZX is a variant of Gigabit Ethernet( GbE) that uses single- mode fibers with a wavelength of 1,550 nm and can bridge distances of up to 70 km.
When using a dispersion-compensated optical fiber, such as DSF fiber, distances of up to 100 km can even be bridged with 1000Base-ZX.
Like the other Gigabit variants, 1000Base-ZX uses 8B/10B coding. The 1000Base-ZX interface is implemented in Mini Gigabit Interface Converters( MGBIC) SPF modules. They contain the SC connectors for the single mode fibers and the optical transceiver.