A Unified Bandwidth Manager that functions as a high-level bandwidth manager to interface with and hierarchically manage a plurality of service-specific bandwidth reservation and session management systems under human operator control. The Unified Bandwidth Manager includes at least an aggregated network communication bandwidth management information display system that functions as a high-level information display system interfacing with a plurality of service-specific bandwidth reservation and session management systems so as to provide an integrated “view” of the enterprise networks operation is described. The system includes at least a display a user interface and one or more types of interfaces to a plurality of service-specific bandwidth managers. In an implementation, the system can include traffic modeling elements and be used as a component of a Unified Bandwidth Manager for unified communications.