Hi
So Ive got a VM with AudioCodes SBC and a telephony PSTN or Client at the other end. The calls are passed through fine, but theres no audio. The SBC is set to be NAT aware and using wireshark I can cleary see that SIP packets is setup correctly. I have come to the point where Ive done a deepdive using tcpdup\Wireshark\packet tracing on both ends, I can clearly see packets getting sent to the public IP of the Azure VM, but when Im using Azure Network Watcher with packet capture, the packets is not visible. Furthermore even if NAT wasnt set up correctly in SIP the packets should come through, anyway.
The reason I suspect that this is a Azure issue, is that I have made a script witch is sending UDP packets to the same ports, these UDP packets go through just fine and are visible in the Network Watcher packet capture.
But once I start RTP packets neither the packets from my script nor the RTP packets from PSTN\Client goes through and are not visible in Azure Network Watcher.
What might be causing this and does anyone got a tip on what the issue might be?