Other metrics may include QoS, RTT, and Maximum Pause.

you might get an idea of your upload and download speeds by installing a online grid meter.

QoS (Quality of Service)

QoSrepresents the ratio of the worst data reading to the best.

It is a measure of the level of consistency in download speeds.

In speed tests, it is represented as a percentage.

The higher it is, the better the quality.

For good VoIP, the QoS should be 80 percent or more.

It is measured in milliseconds (ms).

The smaller this number, the better the connection.

For VoIP, it is sufficient to have an RTT of 250 milliseconds or less.

Round trips that take more time are likely to result in dropped calls or lag time.

Max Pause

This is the longest pause your test has recorded betweendata packets.

For a good call, this should be a small number.

Any max pause below 100 is good for VoIP.

These values should give you a clear idea about how good or bad your connection is.