Packet Voice Sound Quality

Primary algorithms are “CELP” based

VoIP uses G.723.1 at 5.3 and 6.3 kbps (default)
VoFR uses G.729 at 8 kbps (default)

Quantitative measurements show “near toll quality”

Mean Opinion Scores (MOS) measurements

4.0 is “toll quality”

Previous slide Next slide Back to first slide View graphic version