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The Cisco 12000 Series Eight-Port OC-3c/STM-1c ATM Line Card delivers performance and density while providing sophisticated IP quality of service (QoS) functionality and advanced traffic shaping. Service providers face the challenge of meeting customer demand for high-density wire-speed Internet access via ATM while managing end-to-end QoS. The Cisco 12000 Series Eight-Port OC-3c/STM-1c ATM Line Card (8-Port OC-3 ATM) expands the connectivity options for the Cisco 12000 Series Routers so that service providers can attach the routers directly to their existing ATM infrastructure.