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Carriers around the globe are planning how to transition their existing telecommunications transport infrastructure from traditional SONET/SDH to a more cost-per-bit effective transport technology. The main drivers for this transition are the increased demand for bandwidth as well as the need to lower the cost per bit. Consumers of bandwidth expect higher and higher data rates on their fixed lines as well as our wireless connections. At the same time, however, they expect the price to stay the same or, better yet, decrease. This dilemma forces carriers to consider new and more cost-effective transport equipment than traditional SONET/SDH systems, especially for aggregation networks that aggregate data traffic from large amounts of users for onward transport in the core networks.
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