I have Freepbx installed on a VM with a public IP address. I am testing with 2 softphones which can register with PBX and call each other. But there is no audio at all.
I would like your assistance to debug and fix the audio issue. I will happy to discuss my setup with shortlisted candidates.
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This might be an issue with NAT and sip connectivity and I am able to fix this for you. Please go through my past projects and customer feedback over nine years