No audio at all


I’m new to FreePBX and just got a RasPBX machine setup and ready
I’ve created 2 extensions and able to call between them but no matter what I do I don’t have voice.
I’ve also tried to call *43 for self echo test but there is no audio as well.

I’ve already followed the “SIP Audio Issues FreePBX 12+” ( but that didn’t helped…

Any suggestions what to do ?
Both extensions are softphone (one on my PC and the second is on a mobile phone)
I’ve set external IP address and put in my DDNS address
NAT enabled and Router is set to forward 5060 and 10000-20000 only UDP

Many thanks in advance.