Currently, there is a requirement for on the Network> Public IP tab for a singular static IP. However, it looks like 3cx has the ability to use 'stun' but 3cx officially doesn't support it. It would be nice if a primary internet circuit dropped (common in Tampa, Florida over the past 12 months), that a 4G or alternative circuit could take its place. With Mikrotik, I can script 2ndary wan failover to happen on the fly. However, the external IP will change, and unless the IP changes inside the "Public IP" area, I've had issues with 1 way audio. I'd like there to be a '2ndary' Static Public IP field that could be used when either there is an DNS resolution/Network Failure. This way internet failover could happen without any human intervention and keep the client (or enterprise) up.