: The hardware platform designation for the Cisco 5500 series controllers (most commonly the 5508 model). : The software release version (8.3.150.0). Technical Context & Capabilities
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Here is the useful breakdown of what this file name means and whether you should use it. air-ct5500-k9-8-3-150-0
Software version 8.3.x supports a wide range of legacy and modern hardware, including: Wave 2 APs : Aironet 1815, 1830, 1850, 2800, and 3800 series. Legacy APs : The hardware platform designation for the Cisco