This file is frequently discussed in technical documentation and forums regarding two main procedures:
Disable your computer's firewall and ensure the AP can ping your TFTP server. Ap3g3-k9w8-tar.153-3.jpo.tar
This is a request for a of a specific Cisco IOS access point image file. This file is frequently discussed in technical documentation
If an access point is stuck or needs a manual update, you can use the following command from the AP's CLI to download and install the software: Ap3g3-k9w8-tar.153-3.jpo.tar