Cisco 2900 Series IOS Software Universal Images 15.1(4)M

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