Summary - G Suppl. 39 (03/2025) - Optical system design and engineering considerations

Supplement 39 to ITU-T G-series Recommendations provides information on the background and methodologies used in the development of optical interface Recommendations such as ITU-T G.691, ITU-T G.957 and ITU-T G.959.1. This edition introduces probabilistic constellation shaping and describes the use of subcarrier multiplexing in point-to-point and point-to-multipoint applications in addition to other miscellaneous corrections and improvements