Please I need a help. I´m using 3CX PBX system in Brazil, working with vono voip provider. I have install 3CX PBX and work properly all functions but is instable to receive calls. I don´t why the reason when someone call me PBX is mute. But if I restart system or shut dow my computer, PBX return to work properly. It happens at least 5 times a day.