Direct Routing Call Forwarding after 10 seconds - No Audio

[thanmar19]

Hello would appreciate some help.

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.

thanks

[#2]

Hi @thanmar19,

you might check out this, at the bottom of the page "No audio after Hold/Unhold"  https://support.sonus.net/display/UXDOC80/Best+Practice+-+Troubleshoot+Issues+with+Microsoft+Teams+D...

[#3]

Thanks, i will have a read.