Forum Discussion
REASON Q.850;cause 18 text Call Controller timed out while waiting for acknowledgement.
Incoming calls to Microsoft teams get disconnected automatically after 20 seconds. You can make a call from outside, teams phone rings, answer the call, 2 way communication is there but still teams c...
I had problems with RTP on incoming calls. They cut off at 16 seconds. It connected the SIP part but not the RTP part.
My scenario is SBC Audiocodes VE on google cloud. The client is unable to bring up a second network interface on top of the virtual machine in the cloud. So I'm testing it for a single interface. Teams and a SIP trunk over the internet. This interface connects Public Ip --> Internal Ip.
I bring up the Teams service and the trunk - OK.
The incoming calls were cut on the Teams side because it did not receive the ACK, since the ACK was being sent to the Local IP and not to the public one for RTP.
So create a manipulation rule so that the CONTACT is the Public IP and that's it. The RTP worked and it doesn't cut out.