Mean Opinion Score (MOS)

MOS is an industry standard measure of call quality expressed on a scale of increasing perceived quality, from 1 to 5. MOS is computed according to a standard International Telecommunications Union (ITU) algorithm involving the codec for your VoIP network and values of latency, jitter, packet loss, and MOS advantage factor. Jitter, latency, and packet loss are variable quantities that are measured in realtime. Generally, MOS reflects call quality as shown in the following table.

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