Cisco NCS55A1 Router Chassis — Modular High-Capacity Core Router for Service Provider and Data Center NetworksThe Cisco NCS55A1 Router Chassis represents a bold step forward for next generation network infrastructure, delivering scalable performance, modular flexibility, and enterprise grade reliability for todays data intensive environments. Built to extend the legacy of the Cisco Network Convergence System 5501 (NCS 5501), the NCS55A1 combines high density capacity with efficient cooling, robust fault tolerance, and a compelling total cost of ownership for