Abstract: There is disclosed a communication system adapted to establishing a communication between at least two end-points, comprising: a control server for receiving a request including an identifier of a calling number of one end-point and an identifier of an action, and adapted to transmit said request in XML format in dependence upon said action, a switching control server for receiving the request in XML format; an IP router operating under the control of SIP messages from the switching control server; the IP router being controlled for establishing a first communication link to the calling number of the one end-point; wherein the switching controller further controls the IP router to connect the established communication link to the other end-point.