I'm wondering if anyone has a way to collect call quality metrics, either manually or automatically. Background: a customer is having audio lag on calls to some cell phones, sometimes has to hang up their 3CX desk phone extension and call back from their cell phone directly (not the 3CX app). I doubt that it is a 3CX issue because most calls work fine. But as the phone system vendor, I still need to be able to find and solve the issue. The first challenge is just to identify problematic calls. It's hard to persuade a busy customer to keep a call quality log, but if they could just click 1-5 on a screen popup, maybe add a word or two in a text box, they might do that. Even better would be a way to automatically track jitter, packet loss etc. on all calls. I've heard of this in major cloud VoIP vendors. And I see a whole page of options on my Yealink T42G under Settings > Voice Monitoring, all disabled. Besides identifying problems, it would also be nice to have metrics that confirm 98% of calls are working fine... Is anyone using either automatic or manual quality monitoring?