Cisco OC12/STM4-SM-IR-4

Cisco 1-Port OC12/STM4 Packet Over SONET/SDH Line Card
The Cisco® I-Flex design combines shared port adapters (SPAs) and SPA interface processors (SIPs) using an extensible design that enables service prioritization for voice, video, and data services. Enterprise and service provider customers can use the improved slot economics resulting from modular port adapters that are interchangeable across Cisco routing platforms.