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Network operators in all regions of the world face a fundamental dilemma. On the one hand, global IP traffic continues to grow rapidly while the mix shifts to more and more multimedia and peer-to-peer applications. On the other hand, operator revenue is growing at single-digit rates at best and is not keeping pace with network traffic growth. To avoid financial disaster operators must lower the capital and operational costs associated with transporting bits, or increase the revenue that is derived from those bits, or some combination of the two options. To meet these needs, operators are entering a new phase of the Sonet/SDH-to-packet network migration - one that will require new network optical networking architectures and new technologies.
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