Hello all. I am using free 3CX version. If two of my extensions (connected to the 3CX server form the internal network) make a call, there is no problem. But if one of the extensions is connected to the 3CX Server form outside (using the public IP address), the call lasts only 32 seconds when the caller is outside. If the internal extension generates the call to an outside extension, there is no problem. Any hints?