Summary

Recommendation ITU-T G.807 describes the generic functional architecture of the optical media layer that supports the propagation of signals in the context of a transport network. This description is independent of the client characteristic information (CI) that is being carried by a signal in the media network.

Amendment 1 removes the dependence on the ITU-T G.694.1 grid, names the reference point between the digital layer and the modulator/demodulator and uses M-AI/Client CI to replace digital-lane/digital-client.

Revision 2 changes the name of the modulator/demodulator construct to transmitter/receiver. It updates terminology (esp. NMC) in alignment with updated terminology in G.959.1 (2024) Amd. 1 to include subcarrier modulation and point-to-multipoint optical topology in media architecture. Clause 10 is re-organized and includes a description of OTSi carrying multiple independent digital clients using SCM.