Cisco RPS-ADPTR-2921-51 Redundant Power Supply Adapter

The Cisco RPS-ADPTR-2921-51 Redundant Power Supply Adapter is an external interface module that connects Cisco 2921 and 2951 Integrated Services Routers to a Cisco Redundant Power System, providing power redundancy and backup capability. Designed for rear-chassis installation as an external power adapter interface module, it uses an RPS connection port to link the router with Cisco Redundant Power System units for uninterrupted operation in enterprise racks, branch offices, and telecommunications environments. Manufactured by Cisco Systems with part number RPS-ADPTR-2921-51, this adapter supports the Cisco 2921 and 2951 ISR platforms; a related replacement is RPS-ADPTR-2921-52, and its primary applications are router power redundancy and backup power in corporate offices, financial institutions, healthcare networks, and government facilities.