One Way Audio - STUMPED

[mo10]

Please see here and report back. Send screenshots of your setup here.

No sound on External Devices - Beginner Help

Howdy partners, I’ve mange to install and configure VitalPBX on a VM a using my ISP Router to forward the needed ports to use with the Public IP Address. If using a device on the local network I have sound, but If I register an external device which I’ve successfully registered I do not (have sound). Any ideas what could cause this problem? Any help would be much appreciated.