This is the average value over the current performance-monitoring interval of the combined received optical power across all optical lanes of this multi-lane coherent port during the current performance-monitoring interval. The average combined power over the interval is the figure typically compared against the port's overall receiver specification, since it reflects total optical loading regardless of how it's split between lanes. For example, an admin sizing amplifier gain for a shelf would use inOpticalPowerLaneTotalAvg across all ports to plan overall input power budgets rather than tracking each lane separately.