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Magnum14E Media Converters Installation and User Guide (10/02)
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• The 100Mb fiber segment must operate in full-duplex (FDX) mode, i.e. a switch (or
equal external unit such as a FDX NIC) must be used, and
• The worst-case OPB of the fiber link must be greater than the fiber cable’s passive
Attenuation.
(Attenuation = Cable loss + LED aging loss + Insertion loss + safety factor)
3.3.2 Segment Distances, Full-duplex for copper media (RJ-45) and fiber
Full-duplex ports, such as copper are found in switching hubs and some NICs, can
receive and transmit signals simultaneously and do not experience collisions accordingly.
There may be only two nodes present on a full-duplex segment. Media distance rules are not
the same as for standard (half-duplex) Fast Ethernet because collision distance limitations are
not a factor. Specifically, fiber segments can be up to 2Km for multi-mode and up to 25Km for
single mode (or 40Km for “Long Reach” single mode).