esaProbeStatsNumAbsR2PJitter is a 64-bit performance counter that reports the count of occurrences of 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 the interval that is still being actively collected (the live bin). 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, if this live count of absolute jitter from the reflector back to the probe occurrences spikes even though the average magnitude barely changes, the technician learns the events became more frequent, not just occasionally larger, which matters for sizing a jitter buffer.