rttMonIcmpJitterStatsRTTSums 1.3.6.1.4.1.9.9.42.1.3.8.1.5

The sum of RTT's that are successfully measured for this rttMonIcmpJitterStatsStartTimeId hourly group. The number of the successfully measured RTT is stored in the rttMonIcmpJitterStatsNumRTT.