This read-only Counter64 records the actual measured value that triggered this threshold-crossing event, per its description, for example 11, when 11 occurrences happened within the window while the threshold was 10, or, for non-threshold event types, is returned as all F's to indicate the field isn't applicable. This lets an engineer see exactly how far over the configured limit the actual count was, not just that it crossed the line, which helps judge whether a threshold was barely exceeded or blown through badly. Seeing this value read as all F's would immediately tell an engineer the log entry is for a non-threshold event, like linkFaultEvent, rather than a counting anomaly.