Ensemble Activator is a carrier-grade NOS for bare-metal switches, extending our comprehensive Ensemble software suite with a solution for open, scalable and agile packet networks. Built on Adtran?s experience in the design and operation of transport networks, this solution is optimized for the operational needs of CSPs connecting customers to regional and central data centers. A rich set of CE 2.0- and MEF 3.0-compliant network interfaces is complemented with proven IP and MPLS protocols for the first true carrier grade NOS.