Voices choppy in upstream direction
SteveInWA:
That's a horrible MOS. You'll need to contact your internet service provider to diagnose the problem.
BB88:
Quote from: SteveInWA on January 24, 2015, 08:43:11 pm
That's a horrible MOS. You'll need to contact your internet service provider to diagnose the problem.
What is considered a good/bad MOS?
My line is good today without the broken voice issue, and the test result is:
Jitter: you --> server: 2.5 ms
Jitter: server --> you: 3.4 ms
Packet loss: you --> server: 0.0 %
Packet loss: server --> you: 0.0 %
Packet discards: 0.0 %
Packets out of order: 0.0 %
Estimated MOS score: 4.2
azrobert:
Quote
What is considered a good/bad MOS?
Mean opinion score (MOS)
MOS Quality Impairment
5 Excellent Imperceptible
4 Good Perceptible but not annoying
3 Fair Slightly annoying
2 Poor Annoying
1 Bad Very annoying
http://en.wikipedia.org/wiki/Mean_opinion_score
BB88:
Quote from: azrobert on January 25, 2015, 08:53:04 am
Quote
What is considered a good/bad MOS?
Mean opinion score (MOS)
MOS Quality Impairment
5 Excellent Imperceptible
4 Good Perceptible but not annoying
3 Fair Slightly annoying
2 Poor Annoying
1 Bad Very annoying
http://en.wikipedia.org/wiki/Mean_opinion_score
Thanks. According to the wiki, 4.1 is the highest for G.711. Is 3.7 considered horrible?
SteveInWA:
The Bell System originally had humans actually listen to telephone calls and rate the quality of the call. That's why it was called the "Mean Opinion Score"...it was the average of all the judges' opinions. Now, an algorithm is using the individual factors shown in the test result to synthesize what a panel of humans would assess.
4.2 is the theoretical maximum -- this test will never go above that number. So, your recent test showed that all's well at this time. Look at the difference in jitter numbers to see what contributed to the difference from the previous test.
Anything below 4.0 is going to be noticeably poor. This could be caused by anything from your cable modem outward to the internet. You could have some loose or corroded coaxial cable connectors outside your house, for example. It's common at this time of year for water to get into cable companies' coaxial cables and connectors, causing degraded signal quality. You'll have to do battle with your internet service provider to figure out the failure point.
Note that this has nothing to do with either your OBi or your VoIP service providers, since the test completely bypasses those things.
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