Part Number Description
S29UK9-15104M Cisco 2901-2921 IOS UNIVERSAL
S29NPEK9-15104M Cisco 2901-2921 IOS UNIVERSAL - NO PAYLOAD ENCRYPTION
S2951UK9-15104M Cisco 2951 IOS UNIVERSAL
S2951NPEK9-15104M Cisco 2951 IOS UNIVERSAL - NO PAYLOAD ENCRYPTION