Patent ID: 6067299
Filing Date: 2000-05-23
Classification: H04L,H04Q

Abstract:
A method for operating a communication system to establish communications between a first communication device and an Asynchronous Transfer Mode (ATM) network, wherein the communications system comprises a first interworking unit, a second interworking unit, an echo canceller, and a signaling processor, wherein the first interworking unit is connected to the signaling processor and the second interworking unit, wherein the second interworking unit is connected to the signaling processor and the echo canceller, the method comprising:in the first interworking unit, accepting a first DSO from the communication device;in the signaling processor, receiving signaling related to the first DS0;in the signaling processor, processing the signaling to select a first ATM virtual connection from the first interworking unit to the second interworking unit, a second DS0 from the second interworking unit to the echo canceller, and a second ATM virtual connection from the second interworking unit to the ATM network;in the signaling processor, providing a first control instruction to the first interworking unit that identifies the first DSO and the first ATM virtual connection;in the signaling processor, providing a second control instruction to the second interworking unit that identifies the second ATM virtual connection and at least one of the first ATM virtual connection and the second DS0;in the first interworking unit, interworking the first DS0 with the first ATM virtual connection;in the second interworking unit, interworking the first ATM virtual connection with the second DS0 to the echo canceller;in the echo canceller, cancelling echo from the second DS0 and providing the second DS0 back to the second interworking unit; andin the second interworking unit, interworking the second DS0 back from the echo canceller with the second ATM virtual connection.