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I will sum things up.
Current DWDM will power 160 channels or waves as we call them them today. The standard for these waves is currently 10Gbps. 40Gbps and 100Gbps technologies are just now emerging. It is only a matter of time from when we go from having the ability to run 160 x 10G over a single pair of fiber to 160 x 40G and 160 x 100G over a pair of fiber.
If the technology, which some cases work on bi-di "bidi" or bi-directional fiber. I.e 1 strand instead of two making up a circuit you can go from 160x to 320x waves on 2 strands of fiber.
Whoever wrote that article doesn't understand how things work.
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