[asterisk-users] Calculating R Factor and MOS metrics for VoIP

[Steve Underwood]

On 03/08/2010 06:10 PM, mosbah.abdelkader wrote:
> Hello All,
>
>
>
> MOS and R factor are the two QoS parameters used to estimate VoIP call 
> quality.
You can't calculate MOS. Its an assessment based on a lot of human 
hearing. Nonetheless, there is a profitable industry in pretending to 
calculate MOS.

The definition of the R factor can be found in one of the ITU G series 
specs. I can't remember which one, but it should be easy to find.
>
> I have found that they are calculated from other metrics like jitter, 
> latency, packet loss,...etc. But, haven't found any formula or 
> arithmetic rule to calculate them.
>
>
>
> Do you have an idea about their formulas or an open source that 
> calculates them. Is it possible to interpret them from wireshark.
>
Steve