The Cisco 12000 Series Four-Port OC-3c/STM-1c ATM ISE Line Card (4-Port OC-3 ATM ISE) revolutionizes the delivery of carrier edge services by combining extensive service-enabling edge features with advanced ATM traffic management and sophisticated IP/Multiprotocol Label Switching (MPLS)-to-ATM quality of service (QoS) functions, without compromising line-rate performance.