The Cisco 12000 Series One-Port Channelized OC-12c/STM-4 (DS1/E1) ISE Line Card (1-Port CHOC-12 ISE) with its IP Services Engine (ISE) revolutionizes the delivery of edge services by combining the power of the Cisco 12000 Series distributed processing with adaptive networking. Designed for telcos and Internet service providers (ISPs), this card brings high-density, low-speed optical aggregation of DS1 and DS0 with performance and features to the Cisco 12000 Series and supports critical low-speed features for data and packet voice services along with incremental bandwidth growth features such as Multilink Frame Relay (MLFR) and Multilink Point-to-Point Protocol (MLPPP).