Excellent: < 1ms jitter,  < 0.1% packet loss, latency not higher than 20ms
Good:      < 3ms jitter,  < 0.8% packet loss, latency not higher than 30ms
Average:   < 5ms jitter,  < 1.5% packet loss, latency not higher than 60ms
Bad:       < 10ms jitter, < 3% packet loss,   latency not higher than 80ms
Terrible:  < 15ms jitter, < 5% packet loss,  latency not higher than 100ms
Unusable:  <, <