Abstract: A method and apparatus for executing a conference call session between parties provides collaboration between nodes having separate conference-bridging capabilities, so that selection from a number of alternative connectivity schemes can be based upon bridge-to-bridge negotiation. The selection of a connectivity scheme may be based upon one or more of cost and telecommunication resource availability. Selection may also be based upon stored historical data relating to prior conference calls involving at least one of said parties and/or upon historical data of patterns of node resource availability. A conference bridge includes a user interface, a message interface, a connectivity computation component, a conference bridge manager, and a multimedia exchange component. An input to the connectivity computation component includes a database having tariff table information and resource-demand cycle information.