For new residential developments and many business applications,
Ethernet over PON will be the best fit because of its high bandwidth
and long potential service life. For high-end commercial customers, Ethernet over
point-to-point fiber may provide the best solution because it can scale to meet future
bandwidth demands. Service providers will build hybrid networks, especially when
the distance between the central office and the subscriber exceeds a mile. In FTTC
applications, P2P optical fiber or EPON can be used as the interconnect technology
to the central office, extending the reach of the Ethernet over VDSL solution. It is,
therefore, very difficult to identify an application where EPONs do not serve their
purpose in the best possible way.
Passive Optical Networks (PONs) 177
Benefits and Shortcomings
The fundamental benefits of PON technology include flexibility, reliability, and simplicity.
Their deployment eliminates active network components, such as amplifiers,
switches, or regenerators from in-field locations, thus adding to the robustness, simplicity,
and reliability of the structure. In EPON architecture, all active network components
are placed at the ends of the fiber line and all in-field devices are completely passive,
data rate transparent, and typically environmentally hardened, featuring mainly
passive splitter combiners (PSCs).
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