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

[Kevin P. Fleming]

Steve Underwood wrote:

>> 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.

Right, computers don't have 'opinions' (the 'O' in 'MOS'). However, it
seems that many people use PESQ scores as a MOS-equivalent for test and
planning purposes now. However, that requires running predefined samples
through the system under test, not just calculations based on network
effects of real calls.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: kfleming at digium.com
Check us out at www.digium.com & www.asterisk.org