The Cisco® ASR 1000 Series SPA Interface Processor (SIP) based on the Cisco I-Flex design combines shared port adapters (SPAs) and SPA interface processors (SIPs) taking advantage of an extensible design that facilitates service prioritization for voice video and data (triple-play) services. Enterprise and service provider customers can take advantage of improved slot economics resulting from modular port adapters that are interchangeable across Cisco routing platforms.