When it comes to packet transport, one single solution is hardly an answer for all carriers' needs, given the diversity of their subscribers' requirements and the legacy of their installed base. In addition to the cost of the solution, packet transport also must address the transparency and the unique characteristics of the transport network. Ciena's Intelligent Infrastructure allows the combination of several transport technologies-including Coherent 40G/100G and 1T-to provide a complete toolset for the most efficient and comprehensive packet transport architecture, with the agility, efficiency, and cost-effectiveness suited for carrier needs for years to come.