What Is MOS Score In Voice Calls? What Is MOS Score In Voice Calls?

What Is MOS Score In Voice Calls?

Vonage API Support

Question

What Is MOS Score In Voice Calls?

Applies To

  • Voice API

Answer

The Mean Opinion Score (MOS) is one metric for measuring overall voice call quality. MOS score ranges between 1 to 5 of the perceived quality of a voice call (1-lowest and 5-highest). 

With a call sample, our Vonage Support Engineers can look up the MOS Score for that specific call. This helps Vonage and the customer determine if a network quality problem may be affecting the quality of a call concerning symptoms such as garbled audio, missing audio, or one-way audio.  A MOS Score of less than 4 may indicate network quality which may impact the call quality.