In addition, the best-fit scenarios
for these solutions are identified along with their benefits and shortcomings.
Finally, ongoing and future developments are discussed along with economic assessments
and a brief vendor survey. Note that there have been many recent developments
in Ethernet over SONET (EoS), which also uses underlying fiber-based transmission.
However, these avenues are more appropriately discussed in Chapter 11, and the focus
herein is strictly upon native Ethernet transport over fiber cables.
Technology Description
EoF and EoWDM embody native Ethernet transmission over fiber and/or fiber-optic
networks. These streamlined approaches can greatly reduce network complexity and
lower overall service cost. In order to introduce these concepts, however, this section
first reviews the latest advances in some crucial technology areas??”WDM networks,
fiber-optic Ethernet interfaces, and network control and management frameworks.
The implementation of carrier services via EoF and EoWDM is then treated in the
subsequent sections.
Advances in Optical Component Technologies
Commercial fiber optic transmission traces its origins to the 1970s when older multimode
fiber (MMF) systems, as shown in Figure 8.
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