I am testing a similar issue, on both a dedicated and a hosted server that are offsite from where my phone or softphone is. VitalPBX ext set to Force, Comedia
When using the Xlite phone I have no audio, I have been playing with the stun, rtp, ports etc on the Xlite. Also may be an issue with your pc firewall settings
When using a Yealink T46 I have audio on both the dedicated and hosted offsite server and all is well.
When testing the Xlite to a server at the same location on a local network I have audio and all is well, so it is either a pc firewall issue or a setting in the Xlite.
Same on a 3CX softphone no audio unless on the same local network.
