A Reconfigurable Optical Add-Drop Multiplexer (ROADM) is a form of optical add-drop multiplexer (OADM) that adds the ability to remotely switch traffic from a wavelength-division multiplexing (WDM) system at the optical layer. This is achieved through the use of wavelength selective switching (WSS) technology. ROADMs are used in modern optical networks to provide flexible and dynamic allocation of bandwidth, enabling service providers to quickly adapt to changing traffic demands and efficiently manage network resources without manual intervention.
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