I had the situation where Microsoft Teams is configured for Direct Routing and calls are dropped unexpectedly. We are using an Audiocodes SBC in Microsoft Azure and a SIP Trunk from Deutsche Telekom for the PSTN connection.
Sometimes an inbound call is signaled by Microsoft Teams for a second and then, it is dropped. In the Microsoft Teams activity feed a missed call is visible. Also, a missed call was shown in the activity feed even there was no ringing.
At first, I thought I could bring it down to cell phone calls only. But after asking my colleagues some users reported the same behaviour for calls coming from PBX systems.Continue reading “Microsoft Teams and Direct Routing – some calls are failing and marked as missed calls”