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Home > Success Center > VoIP & Network Quality Manager (VNQM) > VNQM - Knowledgebase Articles > How to calculate packet loss in IP SLA VoIP Jitter operations

How to calculate packet loss in IP SLA VoIP Jitter operations

Table of contents


This article provides the formula used to calculate packet loss.


  • Orion IP SLA Manager (VNQM) 3.0 or later


Packet loss is calculated using the following formula:

Packet loss = (SD + DS + MIA) / (SD + DS + MIA + LA + OOS + N)


SD = rttMonLatestJitterOperPacketLossSD (<op_num/>)
DS = rttMonLatestJitterOperPacketLossDS (<op_num/>)
OOS = rttMonLatestJitterOperPacketOutOfSequence (<op_num/>)
MIA = rttMonLatestJitterOperPacketMIA (<op_num/>)
LA = rttMonLatestJitterOperPacketLateArrival (<op_num/>)
N = rttMonLatestJitterOperNumOfRTT (<op_num/>)
<op_num/> = The operation number of your VoIP Jitter operation.



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