Service providers face the challenge of meeting customer demand by building scalable, feature-rich edge networks that can deliver value-added services such as Multiprotocol Label Switching virtual private networks (MPLS VPNs), voice, video, and data integration, and tiered service offerings at all interface rates without compromising density or line rate performance. The Cisco 12000 Series Sixteen-Port, Eight-Port, and Four-Port OC-3c/STM-1c POS/SDH ISE (OC-3 POS ISE) Line Cards provide an extensive set of service-enabling edge features while performing at line-rate on all ports simultaneously.The OC-3 POS ISE Line Cards feature the Cisco 12000 Series IP Services Engine (ISE) - a unique, edge-optimized, programmable adaptive network processor that combines the hardware performance of application-specific integrated circuits (ASICs) with the flexibility of software. They enable a broad range of edge services that also accommodate future customer requirements with simple software upgrades instead of costly hardware replacement.