Powered by the innovative Cisco 12000 Series IP Services Engine (ISE), the Cisco 12000 Series Four-Port OC-12c/STM-4c DPT ISE Line Card (4-Port OC-12 DPT ISE) revolutionizes the delivery of enhanced network services for Dynamic Packet Transport/Resilient Packet Ring (DPT/RPR) networks while providing superior, cost-effective IP/MPLS capabilities. ISE and DPT technology provide the density and economic efficiencies that are essential to address the growing bandwidth needs for edge aggregation in a wide variety of applications, including carrier metropolitan-area networks (MANs) and cable multiple system operator (MSO) networks.