User's Manual
Chapter 16 Test Results
VoIP results
SmartClass TPS User’s Guide
May 2014 22035456, Rev 001 133
Audio Quality Scores
Table 39 describes the VoIP Audio Quality Score results. These results relate to one call.
To view audio quality scores for multiple calls, select Multi-Call Quality Stats. The same results will
be reported as above with the minimum, maximum, and average results for the calls. The two “Best
Possible” results aren’t included because they don’t apply to multi-call results.
Network Delay Time, in milliseconds, needed to travel the network (only displayed when a
call is active)
Encoding Delay Time, in milliseconds, needed to convert samples in selected codec form
Packetization Delay Number of milliseconds needed to fill the frame(s) comprising one RTP data
packet
Buffering Delay Time, in milliseconds, that the data was held in a jitter buffer
Total Delay Total of all delays
Table 39 Audio Quality Score results
Result Definition
Best Possible CQ MOS The best conversation quality (CQ) mean opinion score (MOS) possible
CQ MOS Current conversation quality mean opinion score
LQ MOS Current listener quality mean opinion score
PQ MOS Current packet quality mean opinion score
Best Possible CQ R Factor The best conversation quality R factor possible
CQ R Factor Current conversation quality R factor
LQ R Factor Current listener quality R factor
G.107 R Factor Current G.107 R factor
Burst R Current burst R factor
Gap R Current gap R factor
Table 38 Audio Delay results (Continued)
Result Definition