Cisco IOS Advanced Enterprise Services v15.5(1)T | Software License — S591AESK9-15501T

Preserve advanced service entitlement on Cisco 5915 platforms with IOS Advanced Enterprise Services v.15.5(1)T licensing. This software license is intended for organizations that need a specific Cisco IOS feature set tied to an established deployment, not a broad software bundle. For network operations teams, the appeal is precision: license the advanced enterprise services required for the platform and keep procurement aligned with the actual system in service. That matters when you are maintaining production routing infrastructure, standardizing software entitlements across a fleet, or replacing legacy licensing with a clearly defined Cisco part number. Because this is a license-based product, it fits environments where software access is controlled, documented, and tied to hardware or platform entitlement. It is a practical choice for teams that value compatibility, lifecycle clarity, and vendor-backed licensing over generic alternatives. The result is a cleaner path to sustaining the services your Cisco 5915 environment depends on. Ideal For Licensing Cisco 5915 routers for advanced enterprise IOS services Documenting software entitlement for a production network refresh Replacing legacy Cisco IOS service licensing with a defined part number Standardizing platform-specific licensing across Cisco 5915 deployments Why This Product 1 Platform-specific licensing for Cisco 5915 2 Defined IOS Advanced Enterprise Services release 3 Vendor-issued license for entitlement control 4 Useful for audit-friendly software tracking