If there is no direct network connectivity between the desk phone and any Teams client (desktop, mobile), the call audio does not connect and the call is dropped after a few seconds.
Vasily_Trudaev can you explain what you mean by "direct network connectivity between desk phone and Teams client"?
After 2 years of multiple clients/tenants using MS Phone System/Calling plans with both Poly 3PIP and now native Teams phones (Yealink, Poly) this sort of disconnection and/or lack of 2-way audio on call pickup (dd or via a call queues) continues to happen with everyone on a nearly daily basis. When calls do connect, there is an uncomfortable and annoying delay (5+ seconds) before the parties can hear each other (again, with or WITHOUT call queues).
At my wits end with this nonsense.
Thanks,
Bob