October 2007
Intermediate to advanced
368 pages
10h 55m
English
Content preview from Passive Optical Networks
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1000BASE-PX10 and 1000BASE-PX20. EPON supports at least 16 fiber splits,
a performance exceeding this minimum boundary is acceptable and the maximum
PON split-ratio was not specified because it depends on actual fiber-link losses
and physical-layer capabilities. In reality, most EPONs are deployed with a 1:32
split ratio, with some trials done for 1:64 or even 1:128 split ratios depending on
the available link budgets and fiber-plant configurations [14].
Optical link budgets are determined by individual vendors’ active components
—lasers, receivers, and PON chips. Traditional BPON equipment has typically
used class B optics, but it was determined that some of the PON networks of
20-km transmission lengths were actually stretching the budget to the ...
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