scope:

This Recommendation describes the generic functional architecture of the optical media network from the viewpoint of the propagation of optical signals and the non-associated digital overhead, in the context of a transport network, from a sender at one location to a receiver at another location. The generic functional architecture also includes the description of monitoring of signals propagating in the media, the encoding of client digital information streams, and the modulation onto signals and demodulation of signals to extract the client digital information streams.

This Recommendation provides a set of constructs (definitions and diagrammatic symbols) and the semantics that can be used to describe such a viewpoint. The modelling methodology described in [ITU-T G.800] is used with the extensions necessary to describe the optical media network.

This Recommendation describes the generic functional architecture of the optical media network in a way that is independent of both the client digital information stream that is transferred and the optical technology (e.g., modulation technique) used to effect the transfer.