Reconfigurable Optical Add/Drop Multiplexers (ROADMs) are vital to these advanced networks, enabled by Wavelength Selective Switch (WSS) technology. Over the past ten years, WDM networks have evolved from simple point-to-point systems aimed at fiber exhaust, to single-ring networks to advanced, interconnected, mesh architectures. Each remains a separate data signal, at any bit rate with any protocol, unaffected by other signals on the fiber. WDM architecture is based on a simple concept – instead of transmitting a single signal on a single wavelength, transmit multiple signals, each with a different wavelength. WDM is now a cost-effective, flexible and scalable technology for increasing capacity of a fiber network. Wavelength Division Multiplexing (WDM) transport products are the scalable, optical, foundation for all transport services offerings, allowing for differentiation, capacity, predictability and security.
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