A communications system includes a plurality of service providers, and at least one management unit, wherein the at least one management unit selects at least one service provider of the plurality of service providers and utilizes at least one service of the at least one service provider to provide a...http://www.google.fr/patents/US7302053?utm_source=gb-gplus-shareBrevet US7302053 - System and method for providing a communication session
System and method for providing a communication session
