esaProbeHistoryMaxAbsR2PJitter is an unsigned 32-bit value that reports the highest recorded absolute-value one-way jitter (magnitude of the delay swing regardless of direction), in microseconds, from the reflector back to the probe, applicable to Layer 3 ICMP-timestamp and Layer 2 Y.1731 probes, for a completed interval that has already closed and been archived into the rolling history log. Because it discards the sign of the swing, this absolute-jitter figure from the reflector back to the probe gives a technician a single severity number to alarm on without watching the positive and negative jitter counters separately. For example, scanning this worst-case absolute jitter from the reflector back to the probe across a week of archived bins lets the technician find the specific hour a transient spike occurred, long after the live dashboard has moved on to newer data.