Microsoftphake That isn't exactly what we are seeing. This is using a Ribbon SWe Lite SBC (same code base as the SBC 1000). When a queue has an on prem Direct Routing number assigned to it and an agent using a VVX (3PIP) phone tries to pick up the call, the end user continues to hear music on hold (from the call queue) and the agent hears a single beep and then then silence. When the agent hangs up, the call will remain in the queue (and if configured to, continue on to voicemail). We have replicated this in multiple tenants with different gateways (although same make and model). We can replicate this issue 100% of the time. The Microsoft Direct routing team has been working on it since May with us and just a few weeks ago, said they had identified it as an SRTP issue with the Ribbon gateway. We have a ticket open with Ribbon (we have had that since May, as well) and they are now working on it. They think they may have identified the bug, but we have not heard any updates in over a week (but there was the Thanksgiving holiday in there).
