What is a MOS Score & how does it Relate to VoIP?

What is a MOS Score & how does it Relate to VoIP?

MOS= Mean Opinion Score for VoIP Testing Mean Opinion Score or MOS assigns a score (1.0-5.0) to indicate Voice over IP call quality after it is transmitted and compressed using codecs.  The result is a measurement that is useful in predicting VoIP call...