Audio quality stats display the network-level measures such as jitter, packet loss, audio level, and round trip time (RTT). These are color-coded as green (good), yellow (average), and red (bad) based on industry-standard thresholds.
|
Metric |
Good |
Average |
Bad |
|
Jitter |
<= 10 ms |
10 – 30 ms |
>=30 ms |
|
Packet loss |
< 0.5% |
0.5% – 0.9% |
>= 0.9% |
|
Audio level |
>-40 dB |
-80 to -40 dB |
<-80 dB |
|
RTT |
< 200 ms |
200 – 300 ms |
> 300 ms |
The values for each of these metrics are displayed using percentiles.
Reading audio quality stats
Statement 1: 30th percentile of jitter is 8 ms.
- If all the jitter values captured on a call are sorted in ascending order, then 30% of these values are ≤ 8 ms.
- This equates the capture of each value with a unit of time in the call. It can also be read as 30% of overall call duration — not necessarily the first or the last 30% — has jitter ≤ 8 ms.
- Since percentiles indicate values sorted in ascending order, this also indicates that 100 - 30 = 70% of the call has jitter > 8 ms.
Statement 2: 95th percentile of jitter is 32 ms while all the lower percentiles are ≤ 30 ms.
- 95% of the jitter values captured on the call, or 95% duration of the overall call, has jitter ≤ 32 ms.
- This falls in the bad range of jitter and will be color-coded in red.
- 100 - 95 = 5% of call has jitter ≥ 32 ms. This is also in the bad range.
Statement 3: 99th percentile of jitter is 30 ms.
- 99% of the call has jitter ≤ 30 ms; therefore, 99% of the call is not within the bad range.
- 100 - 99 = 1% of the call has jitter > 30 ms, hence 1% of the call is within the bad range.