HP ProCurve Tech Brief: 100BASE-FX Ethernet

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100BASE-FX Technical Brief

Introduction ............................................................................................................... 2

Quick history.............................................................................................................. 2

Benefits of 100BASE-FX ............................................................................................... 2

Conclusion ................................................................................................................. 3

Appendix ................................................................................................................... 4

Summary of content (5 pages)

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ProCurve Networking 100BASE-FX Technical Brief Introduction ............................................................................................................... 2 Quick history .............................................................................................................. 2 Benefits of 100BASE-FX ............................................................................................... 2 Conclusion .............................................................................
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Introduction New technologies generate great excitement, but sometimes older technologies continue to serve important needs. An example of such a technology is 100BASE-FX. Although 100BASE-FX was developed in the mid-1990s, it is still in use today, 10 years later, when we also have Gigabit and 10-Gigabit available. Why? One reason is that 100-FX has the longest range over multimode fiberoptic cable of any Ethernet technology.
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In large campus environments, fiberoptic cabling is required to reach the distances between buildings. Because of the FDDI legacy, many of those fiberoptic links are constructed of multimode fiber with distances no greater than two kilometers. When 100-Megabit communication is adequate, this campus example is a perfect fit for 100-FX.
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Appendix Distances Supported on Fiberoptic Cabling for Different Technologies. Fiberoptic distance vs technology 0 km bps 10 M 10BASE-FL bps 100 M 1 km or 1000BASE-LX or 1000BASE-LX10 or 550 m (MM 50) 550 m (MM 62.5 or 50) 550 m (MM 62.5 or 50) 5 km (spec), 10 km (vendors) (SM) 10 km (SM) 10 km (SM - one fiber strand) 70 km (SM) 1000BASE-LH or or 10GBASE-LRM 33 m (MM 62.5) 300 m (MM 50) 50 m (MM 62.5) 300 m (MM 50) 220 m (MM 62.
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