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AssigneeAT&T Labs, Inc.
InventorsHaifeng BI, George ALLEN, Randy BEAMON, Alice CARLSON, Weijing CHEN, Janice DOERNER, Mehran ESFANDIARI, Gary GIBBONS, Paul KASCHUBE, Bruce NANCE, John PINCH, Tina SIGARTO, Barbara SMITH, Matthew STAFFORD, George YOUNG
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A System and method for reducing and surviving failures in a voice trunking over ATM (VTOA) environment includes a CS-IWF complex having a plurality of interconnected CS-IWF units, each unit having a plurality of processors. An end office building may also be provided for interaction with the VTOA system. The end office building includes multiple T-IWFs, and a switch that distributes calls among the T-IWFs in a load sharing manner. Each T-IWF has a plurality of processors and is part of the VTOA system. A switch management system is also provided in the VTOA system. In order to reduce and survive failures, the switch management system includes a plurality of switch management system units. At least one of the switch management system units is a backup unit for a primary switch management system unit. Each switch management system unit provides application redundancy within itself.
A control and signaling interworking function (CS-IWF) system interacting with a virtual trunking system, the CS-IWF system performing call control functions for transmitting voice across a data network in the virtual trunking system, the CS-IWF system comprising:
The system of claim of 1, wherein calls originating and terminating within a public switched telephone network (PSTN) are transmitted through the data network.
The system of claim of 1, wherein the at least one data network switch comprises an ATM switch.
The system of claim of 1, further comprising a plurality of data network links that connect each of the plurality of CS-IWF units to the at least one data network switch.
The system of claim of 1, wherein each of the plurality of CS-IWF units operates one of an active mode or standby mode.
The system of claim of 1, wherein the plurality of CS-IWF units are configured to operate in a load-sharing mode.
The system of claim of 1, wherein the CS-IWF system is identifiable by a single point code.
A control and signaling interworking function (CS-IWF) device, performing call control functions for transmitting voice across a data network, comprising at least one data network switch, in a virtual trunking system, the CS-IWF device comprising:
A fault-tolerant switch management system (SMS) for controlling a plurality of distributed switches in a virtual trunking system, the SMS comprising:
Dependencies are inferred from the claim text.