Cisco IOS Release 15.9(3)M "provides the latest innovations for the world's most demanding networks and is designed to provide a unified network architecture that is stable, reliable, and secure". The M10 rebuild introduces substantial enhancements that directly answer the question "What makes it better?"
: IR800 series routers (IR807, IR809, IR829) and CGR1000 series connected grid routers. Key Components : IOS Version : 15.9(3)M10 c800universalk9mzspa1593m10bin better
Router# copy tftp flash: Address or name of remote host []? 192.168.1.100 Source filename []? c800-universalk9-mz.SPA.159-3.M10.bin Destination filename []? c800-universalk9-mz.SPA.159-3.M10.bin Cisco IOS Release 15