Hi,
trixter aka Bret McDanel wrote:
MOS (Mean Opinion Score) is generally a bunch of people sitting there
listening to audio and rating it 1-5 (there is a newer method that is
"twice as good" becuase it goes 1-10, basically all values are double).
Its their opinion. This generally cant be dont automagically and still
be MOS. You can try to track frame drops and other things on your end
to rate call quality and try to come up with something, but that
technically isnt MOS.
AFAIK asterisk doesnt keep statistics of jitter, frame drops or anything
else, that might be a good project for someone to take on, especially if
you have multiple providers so you can rate quality in a more meaningful
way. The human ear really isnt the best tool for much of this.
There are ways to guesstimate MOS scores on a call by continuously
getting some decent statistics from the jitterbuffer. We've had an
intern do some work on this using IAXclient.
http://www.speakup.nl/en/opensource/jitterbuffer/
Florian
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