Reconfigurable Optical Add Drop To multiplex

ROADM is the acronym of the English expression Reconfigurable Optical Add Drop Multiplexer , or “optical multiplexer of reconfigurable insertion-extraction”, according to the translation approved by the Québécois Office of the French language. It is of a material Technologie (and not about a software Norme) facilitating the management of the networks Internet and lowering the costs of levelling and reconfiguration of those.

Industrial definitions

According to the equipment supplier Alcatel, this technology “makes it possible to the service providers to remotely define and reconfigure the wavelengths while adding the flexibility which characterizes the mode any-wavelength-to-anywhere (any wavelength at any place) with their infrastructure network. This possibility enables them to optimize their costs of exploitation and to strongly reduce displacements on the ground to update and ensure the maintenance of the underground railway networks and regional.

According to an expert quoted by Telephony Online, ROADM was created in order to facilitate the planning and the processes of supply of circuits (optical) on a ring WDM. That replaces what was a manual process before, with a weak margin of error, flexibility to carry out the changes in real-time and, and thus, that progressively allows the reconfiguration of the network according to its state or the customer requirements. Certain technologies ROADM can be wide beyond the ring networks and apply in mesh networks. What distinguishes the ROADM specifically, it is that commutation is carried out on the level of the optical layer, without conversion of the signal in an electronic state.

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