I have a client using Teams telephony with a Ribbon SBC for Direct Routing. All appears to be working fine apart from one issue:
If a client call forwards to a group using /Settings/calls/if unanswered/ after a delay there is no Audio after the call forward is answered:
So an outside caller (Party A) rings Party B(Teams Direct Routing DDI) who call forwards after 10 secs to Teams client Party C. If Party C answers within 10 Secs Audio is ok! If answered after 10 Secs - No Audio.
Have ticket open with MS for weeks now and not getting much joy.
Checked firewall not blocking anything, checked SBC config, nothing untoward, MS blaming SBC/Firewall, SBC people blaming MS/Firewall,...Just wondering if anyone is having the same issue or any other feedback.