No Audio - External Calls

Hi everyone,

Probably me missing something but I've used the PBX installer via the partner portal to fire up our NFR system and I'm unable to get audio for external calls. Internal calls work just fine and the SIP trunk is registered OK. For reference, I'm using Gamma (UK) SIP trunks via IP registration. Just wondering whether there is something I'm missing here. All required ports are opened on the network / firewall settings within lightsail.

Cheers