Anyone using any type of pre or post network analysis tools for checking and troubleshooting voice quality? I know companies like RingCentral and 8x8 have a tool (agent) they can install on your network to collect data, test and identify potential issues. I also know there are some high end tools for this but I wanted to see if anyone has a tool set recommendation or found an easy to use solution. Of course OpenSource would be great but I'm looking for any affordable solution. Preferably something even a junior tech could use and review.