The Cisco I-Flex design combines shared port adapters (SPAs) & SPA interface processors (SIPs), leveraging an extensible design that enables service prioritization for voice, video & data services. Enterprise & service provider customers can take advantage of enhanced slot economics resulting from modular port adapters that are interchangeable across Cisco routing platforms. The I-Flex design maximizes connectivity options & offers superior service intelligence through programmable interface processors that deliver line-rate performance. I-Flex enhances speed-to-service revenue & provides a rich set of Qo S features for premium service delivery while effectively reducing the overall cost of ownership.