This object accumulates the sum of all Round-Trip Time (RTT) measurements collected during jitter monitoring probes, with a companion high-order 32-bit counter to handle overflow. RTT measures the time for a packet to travel from the probe source to its destination and back, and jitter measures variation in that delay; this sum is used to compute average RTT. Network operators analyze this metric alongside other jitter statistics to assess application performance and diagnose latency-related issues.