The Cisco XR 12000 Series and Cisco 12000 Series routers are a
portfolio of intelligent routing solutions that scale from 2.5-Gbps
to n x 10-Gbps capacity per slot, enabling carrier-class IP/MPLS
networks and accelerating your company's evolution to IP
Next-Generation Networks. Built upon a foundation of investment
protection, this portfolio delivers up to 1.28-terabits-per-second
switching capacity with wire-speed feature performance,
scalability, and graceful hardware and software upgrade paths.