Cisco Carrier Routing System
The Cisco CRS-1 Carrier Routing System is the industry's first carrier router offering continuous system operation, unprecedented service flexibility, and system longevity. The Cisco CRS-1 is powered by Cisco IOS XR Software, a unique self-healing and self-defending operating system designed for always-on operation while scaling system capacity up to 92 Tbps. The innovative system architecture combines the Cisco Silicon Packet Processor, the first programmable 40-Gbps ASIC, with the Cisco Service Separation Architecture for unprecedented service flexibility and speed to service. The Cisco CRS-1 marks a new era in carrier IP communications by powering the foundation for network and service convergence today while protecting investments for decades to come.

The Cisco CRS-1 includes two major elements, Line-Card Shelves and Fabric Shelves, combinations of which allow the Cisco CRS-1 to scale from sixteen 40-Gbps slots to as many 1152 40-Gbps slots in 72 Line-Card shelves interconnected using eight Fabric Shelves, all operating as a single system.

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