Decoding the filename reveals the technical specifications of the software:
You would download and deploy C1140-k9w7-tar.124-25d.ja.tar in the following scenarios: C1140-k9w7-tar.124-25d.ja.tar
file is hosted on a TFTP or FTP server; the AP fetches the archive, extracts the operating system and the web interface, and overwrites its flash memory. This transformation effectively "reincarnates" a dependent radio into a fully-functional, intelligent router for wireless clients. Conclusion C1140-k9w7-tar.124-25d.ja.tar the AP fetches the archive
The 124-25d.ja portion is critical. The suffix tells us that this is an Autonomous IOS . C1140-k9w7-tar.124-25d.ja.tar