For what it's worth, here's some history on it (MOS):
MOS stands for "Mean Opinion Score" and is a concept that's a holdover from good old fashioned analog telephony; 5 is "excellent", 1 is "poor".
Virtually every aspect of a telephone network - right down to the microphone and speaker in an analog telephone set - were engineered for optimal voice quality.
Voice quality wasn't accurately measurable instrumentally or algorithmically; it's a subjective thing that can vary from listener to listener. So, the test was performed in a manner such as the following: actual people read standardized passages to other actual people on the other end of a phone line, who then rated what they perceived to be the quality of what they heard. The MOS was the calculated arithmetic mean of the values reported by the listeners.
MOS is still used today albeit in a slightly different way; for example, you could compare the effect of different CODECS on both MOS and on bandwidth.
Hope that's of use to someone.
- Larry
Is there any docs page in confluence that described the mos/cdr value... there's RTP value, but no explication.Regards,2015-12-21 16:56 GMT+01:00 Sergey Safarov <s.safarov@gmail.com>:xml_cdr log contains channel RTP statistic.
For b-leg statistic is need to enable cdr for b-legOn Mon, Dec 21, 2015, 18:33 Grant Bagdasarian <gb@cm.nl> wrote:_________________________________________________________________________Hello,
Is it possible to show channel stats in freeswitch, like on asterisk (sip show channelstats)?
Or perhaps another way of measuring call quality?
Regards,
Grant
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