I see below information other ip-pbx web site. How does 3cx work for transmits audio between external(remote) extension-phone & Voip-provider? How does 3cx work for transmits audio between external(remote) extension-phone & local extensions? directly or via 3cx? Audio bypass: "This is an advanced option. When setting to yes be sure to make some testcalls. Audio bypass transmits audio directly between phone & provider if both are enabled. Some devices and providers don't support it resulting in dropped calls or missing audio." do you add this option? thanks.