Wavelength Division Multiplexing (CWDM) is popular and a good start for most customers due to its relatively low cost and high increase in capacity versus a single data stream. However, as bandwidth demands increase, it becomes necessary for those same customers to add additional capacity. Dense Wavelength Division Multiplexing (DWDM) allows you to add this additional capacity without replacing your existing CWDM infrastructure and with minimal, if any, service interruption.
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