Summary - G.979 (11/2025) - Characteristics of monitoring systems for optical fibre submarine cable systems

Recommendation ITU-T G.979 addresses the characteristics of monitoring systems for optical fibre submarine cable systems. It covers the aspects related to functional architecture, the characteristics of monitoring equipment and the parameters for monitoring.
The second edition of the Recommendation included some modifications to apply monitoring systems to repeaterless systems as well as repeatered systems.
This third edition of the Recommendation includes generic monitoring requirements for sensing functionalities.