What is the driving force for the global information community with regard to broadband communication advancement – demand for higher bandwidth with a twist of QoS at a lower cost compared bit by bit to yesterdays broadband systems. In general the discussions are focused on the capacity across the board - however this can be achieved in many ways, but focusing on the physical connectivity it is necessary to distinguish between Space Division Multiplexing (SDP), Time Division Multiplexing (TDM) and Wave Division Multiplexing (WDM).
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