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(C) Herbert Haas
2005/03/11
1000BaseX
Two different wavelengths supported
Full duplex only
1000Base-SX: short wave, 850 nm MMF
1000Base-LX: long wave, 1300 nm MMF or SMF
1000Base-CX:
Twinax Cable (high quality 150 Ohm balanced
shielded copper cable)
About 25 m distance limit, DB-9 or the newer
HSSDC connector
Gigabit Ethernet can be transmitted over various types of fiber. Currently (at
least) two types are specified, short and long wave transmissions, using 850 nm
and 1300 nm respectively. The long wave can be used with both single mode
(SMF) and multimode fibers (MMF). Only SMF can be used for WAN
transmissions because of the much lower dispersion effects.
Note that there are several other implementations offered by different vendors,
such as using very long wavelengths at 1550 nm together with DWDM
configurations.
The twinax cable is basically a shielded twisted pair cable.