Installation of VOIP quality call monitor tool on Asterisk

I need to install on my server a voip quality monitor tool for my service of reseller of voip traffic. I found this [login to view URL] (it's free and open source) that it seems the best VOIP monitor tool (with also the indication of the MOS value). I need to check for each of my hosts (connected by VPN to my server) the quality of the call with much details as possible to identify any problems on the customer's network, or on the output trunk. Then in addition to monitoring the quality of calls I must be able to "filter" for each of my customer. Thanks