What is MOS in VoIP? Understanding Mean Opinion Score for Call Quality Technical, VoIP Monitoring voip, mos, mean opinion score, call quality, network performance, latency, jitter, packet loss, voip mos score explanation, how to measure voip call quality, factors affecting voip mos score, voip latency jitter packet loss mos, mean opinion score voip scale, improve voip mos score, voip call quality metrics, subjective vs objective mos voip Andreas Granig April 16, 2026