Router firmware for the P-660HN-T1A, packed in a 1.32 MB RAR archive. The string 340BYF10C0 appears to be the firmware version code. The T1A variant needs its own images, so verify the exact model suffix on the device label before uploading. Technicians use this kind of file to restore a modem with corrupted firmware via the web interface or a recovery bootloader. Save the existing configuration first, and do not load images meant for the T1 or T1H, which are different hardware.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @afsbiosfree. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →