VOS3000 is designed for carrier-class operations by WESTERN DATACENTER, Providing Account Management, ExchangeRate Management, Rate Management, Package Management, Phone Management, Softswitch Management, IVR Management, System Management, User Management, Data Query and Web Self-Service System,Increased DTMF delivery methods, Signaling trace, Interface Shortcuts, Sound management interface for VoIP business operation needs such functions, and contains the Billing System, it is really all in one product.