B. Manual TFTP deployment (for environments without CUCM)
Official firmware should be sourced from the Cisco Software Download page. You typically need a valid Cisco Connection Online (CCO) account and an active service contract to access these files. : Cisco Ip Phone 7965 Firmware Download
Reset the phones from the CUCM Administration page to trigger the download. Cisco Ip Phone 7965 Firmware Download
While most guides tell you to set Option 150 (TFTP server IP), the 7965 firmware download process actually uses: Cisco Ip Phone 7965 Firmware Download
You may need a XMLDefault.cnf.xml or SEP .cnf.xml file in the TFTP root that points to the specific firmware load name. Initiate Factory Reset: