Where to look, if Teams Audio/Video is not as good as expected

Poor audio, video artefacts etc are the most annoying problems with teams meetings and many thing can go wrong here. It can be the client, the headset, webcam and environment. But most time we have to dig deeper into Call Analystics, CQD-Databases and understand the various counters, who are collected by Microsoft Teams. Admins must understand, how A/V is transmitted, why you must open 3478-3481/UDP and how to check that. Learn about the various misconfigurations, how mediastreams are traveling and diagnose the bottelnecks. We talk about RTP, ICE, STUN, TURN and why bandwidthmonitoring with SNMP is not the right way to measure your network.