The Call Quality Widget tests for the actual session quality when connecting a WebRTC
session with the service being tested.
Data we collect and share
MOS Score
Mean Opinion Score. A value between 1-5 indicating a subjective
quality measurement. The verbose explanation next to the number is
usually enough.
Round Trip
The time it takes for a packet to be sent and a reply to be
received back. The shorter the roundtrip the higher the media
quality.
Packet Loss
Percentage of packets lost in the test. The lower the value the
higher the media quality.
Jitter
Jitter of the session in the test. The higher the value the lower
the media quality is.
MOS score
The MOS score verbose explanation text is based on the following ranges:
MOS > 4
Excellent
3 > MOS >= 4
Good
2 > MOS >= 3
Fair
1 > MOS >= 2
Poor
MOS <= 1
Bad
Things to notice
Bad scoring immediately means low media quality. Specifically since this tests
an actual WebRTC session on the service. Other widgets provide more hints to the
reasons why the quality is low (type of connection, capacity, etc).