The letter describes the recently developed fastest time-division switch experimental system operating at 512 Mbit/s. The system adopts a new switch structure which can increase switching throughput by four times over the basic structure to ensure high-speed performance. Also employed in the switch are two types of peripheral logic developed using Si bipolar super-self-aligned process technology. This switch makes possible the ISDN time-division switches necessary for TV and high-definition TV communication.
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