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FDDI-II is designed for networks that need to transport real-time video or traffic that cannot tolerate delays. Bandwidth is divided into up to 16 separate circuits that operate at from 6.144 Mbps each to a maximum 99.072 Mbps. Each of these channels can be subdivided further to produce a total of 96 64- Kbps circuits.
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FDDI-II is incompatible with existing FDDI design.
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CDDI - Copper Distributed Data Interface
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media: TP-PMD UTP5
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max interstation distance : 100m
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Fiber optic cable
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immune to electromagnetic interference
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secure (does not emit a signal outside the cable)
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multimode fiber - passes several frequencies of light (62.5/125 um)
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singlemode fiber
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