Patent ID: 7508821
Filing Date: 2009-03-24
Classification: H04M

Abstract:
1. A method for setting-up a data connection between a first terminal device connected to a first connection controller and a second terminal device connected to a second connection controller, comprising: establishing signaling connections from the first terminal device to the first connection controller, thence to at least one intermediate controller, thence to the second connection controller; transmitting a setup message comprising first useful data parameters comprising address information specific to the first terminal device from the first terminal device to the second connection controller over the established signaling connections; storing the first useful data parameters in the second connection controller; transmitting the connection setup message without the first useful data parameters from the second connection controller to the second terminal device; transmitting an acknowledgement message from the second terminal device to the second connection controller; setting-up a direct connection between the second connection controller and the first connection controller, bypassing the at least one intermediate controller; transmitting second useful data parameters comprising address information specific to the second terminal device from the second terminal device to the first terminal device via the direct connection; setting-up a first unidirectional connection from the first terminal device to the second terminal device via the first and second connection controllers, bypassing the at least one intermediate controller; transmitting the stored first useful data parameters from the second connection controller to the second terminal device; setting-up a second unidirectional connection from the second terminal device to the first communication device via the first and second connection controllers, bypassing the at least one intermediate controller; and transmitting useful data bi-directionally between the first and second terminal devices using the first and second unidirectional connections, wherein a media server is connected to one of the connection controllers, and wherein a preliminary data connection is set up between the media server and the first terminal device during initial connection setup signaling.