Are you planning to use this Access Point in mode or with a Wireless LAN Controller ?
Cisco distributes access point software using a strict, structured naming convention. Breaking down ap3g3-k9w8-tar.153-3.jpo.tar reveals its exact design, features, and system capabilities: Filename Component Technical Definition & Meaning
Some surplus 3700 APs ship with 12.x or 15.2(2) images that refuse to join a WLC 7.6. Loading 153-3.jpo.tar serves as a "bridge" image before jumping to 15.3(3)JF or 15.3(3)JK. Ap3g3-k9w8-tar.153-3.jpo.tar
To connect directly to the AP for configuration. Terminal Emulator: Such as PuTTY or Tera Term. Step-by-Step Installation Guide (Autonomous Mode)
: Updating an existing Autonomous AP to a newer, more stable, or more secure software version. Are you planning to use this Access Point
Assign a static IP address to your computer's network card (for example, 10.0.0.2 with a subnet mask of 255.255.255.0 ).
: The status LEDs on the access point flickered from amber to a steady, pulsing green. Loading 153-3
ap# archive download-sw /overwrite tftp://<server-ip>/ap3g3-k9w8-tar.153-3.jpo.tar
Even experienced engineers trip over these issues with the .tar image:
Cisco uses a strict, uniform nomenclature for its Access Point (AP) binaries. Breaking down Ap3g3-k9w8-tar.153-3.jpo.tar explains exactly what hardware and capabilities are contained inside: 1700_2600_2700_3600_3700 - HappyFile by PeckServers