Measuring quality of Internet connection for VoIP

Hello,

I would like to ask if there is a way how to use check_mk to measure quality of Internet connection for VoIP.

All of our customers have a phone exchange from us and almost everybody is already using SIP trunk.
Which brings completely new tasks to our team.

I would like to have a check which measures jitter, delay, packet los, mos and etc. for tcp and und connections.

I have already found iperf3 plugin for check_mk, but so far I was not succesfull to implement it.

Is there someone who could point me in right direction? Thank you.

old topic but current problem.