Nortel's innovative Provider Backbone Bridging (PBB) and Provider Backbone Transport (PBT) technologies are set to revolutionize metro networking as firms look for an evolution strategy that will enable them to support the growing demand for high-bandwidth video and data services in their metropolitan networks. Nortel delivers a simple, cost-effective metro evolution approach that is scalable, easy to implement and manage. Currently making their way through standards bodies, PBB and PBT, extend the capabilities of Ethernet to solve today's challenges that bring determinism, hard QoS, scale, 50 ms resiliency and carrier-class OAM tools to native Ethernet.