To work with patched firmware, you generally need the following: TFTP Server : A tool like to transfer files between your PC and the ONT. Telnet Access

: A popular Python script used to modify existing F601 firmware partitions (like kernel0 or kernel1 ).

: Some regional versions allow local updates through the Maintenance > Firmware Update menu.

: Specialized "Patcher" tools exist to bypass restrictions that prevent users from downgrading to older, more flexible firmware versions.