Patent ID: 6389011
Filing Date: 2002-05-14
Classification: H04J,H04L,H04M,H04Q

Abstract:
A method for establishing an Asynchronous Transfer Mode (ATM) connection from an originating end office to a destination end office across an ATM network via an originating trunk interworking function (T-IWF) device and a terminating T-IWF device, the method comprising:transmitting an originating message, including a called telephone number, from the originating end office to a centralized control and signaling interworking function (CS-IWF) device; processing the originating message to identify the originating T-IWF device and to identify the terminating T-IWF device; forwarding a terminating message, including the called telephone number, from the CS-IWF device to the destination end office; initially reserving a first trunk between the originating end office and the originating T-IWF device, the first trunk having a first trunk ID, the originating message further comprising the first trunk ID; sending an ATM request via the ATM network to the terminating T-IWF device requesting a second trunk between the terminating T-IWF device and the destination end office, the second trunk having a second trunk ID; reserving the second trunk; forwarding a trunk ATM message via the ATM network from the terminating T-IWF device to the CS-IWF device, the trunk ATM message comprising the second trunk ID; and establishing an ATM connection between the originating T-IWF device and the terminating T-IWF device.