The Cisco 12000 Series routers make up a portfolio of intelligent routing solutions that scale from 2.5 Gbps/slot to 40 Gbps/slot capacity, enabling carrier-class IP/MPLS core and edge networks.This portfolio uses advanced silicon and software technologies, delivering high standards of routing performance and quality of service capabilities, comprehensive high-availability support, ATM/Frame Relay transport, and an integrated core and edge feature set. With a fully upgradable modular switch fabric, the Cisco 12000 Series routers help provide investment protection and low total cost of ownership.