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Different techniques exist for an asynchronous transfer mode (ATM) switch design. An ideal ATM switch has high throughput, low loss and low delay. A technique for designing an ATM switch is the use of a shared medium. In this technique a bus or ring may be used as the shared medium. A new switch that uses a dual ring as a shared medium is introduced. The dual ring topology has been proposed for local area networks and has higher throughput than a conventional ring. A throughput higher than 96%, delay less than 35 μs and low loss are the results obtained from the performance analysis of this new switch.