Selecting the best optical fiber for a given long haul route is not a simple decision. Over the expected lifetime of a fiber, transmission technology and electronics will likely change and be upgraded several times. As a result, optical cables are often deployed with several fiber types in the same cable. This strategy can help ensure that the most options possible are available as the network evolves.|Selecting the best optical fiber for a given long haul route is not a simple decision. Over the expected lifetime of a fiber, transmission technology and electronics will likely change and be upgraded several times. As a result, optical cables are often deployed with several fiber types in the same cable. This strategy can help ensure that the most options possible are available as the network evolves.

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