Maintain Cisco NCS 5500 route processor hardware coverage at a 24x7x4 service level. SP-AR3-NC55RP12 is a 12-month hardware support service for the route processor component used in the NCS 5500 routing platform. Its scope is hardware support rather than a router chassis, software license, or standalone network appliance. The 24x7x4 designation identifies a round-the-clock hardware support tier with a four-hour service-response target. This level suits route processor infrastructure supporting core, aggregation, peering, and provider-edge functions where an interruption can affect multiple routed services. The service is specifically associated with an NCS 5500 route processor, helping keep coverage aligned to that hardware element rather than applying a generic support designation across unrelated equipment. Use this service term where the installed route processor requires continued Cisco hardware support for 12 months. Validate the covered route processor configuration against the deployed NCS 5500 platform before assignment, particularly where a system contains multiple route processors or separately covered chassis components. The distinguishing characteristics of this service are its route-processor scope, 24x7x4 hardware tier, and fixed 12-month duration.