C800universalk9mzspa1573m9bin Exclusive Link

: Always backup current configurations to a TFTP or FTP server before initiating a boot system upgrade. Cross Platform Release Notes for Cisco IOS Release 15.7(3)M

: Integration of new networking features, such as better support for IoT, enhanced Quality of Service (QoS), and more flexible configuration options. c800universalk9mzspa1573m9bin exclusive

Are you still rocking the 881s and 891s in your branches, or have you already migrated to the C1100 series? Let's talk about the survival of the ISR 800 in the comments! 👇 : Always backup current configurations to a TFTP

: Stands for "Software Production Assembly," indicating a digitally signed, official release from Cisco. such as better support for IoT