Air-ct5500-k9-8-3-150-0 -

The string refers to a specific software release for the Cisco 5500 Series Wireless LAN Controllers (WLC) .

The string is more than a filename; it represents the apex of reliability for the Cisco 5500 platform. For organizations unable to budget for a 9800 controller refresh, this software image provides: air-ct5500-k9-8-3-150-0