With explosive growth in high-speed access and optics technology, and increased user demand for bandwidth, today’s communications network is becoming a bottleneck. To satisfy the users of tomorrow, communications networks must surpass their current levels of performance while creating new revenue-producing services. With a wide variety of traffic for voice, video and data sharing the network, equipment vendors must deliver traffic at high rates, with a high degree of reliability and cost-effectiveness, and with the ability to differentiate traffic services at wire speed.