Firmware archive of 1.32 MB for the P-660HN-T1H ADSL router. The name gives no version number or IPv6 note, so it may be an older or base build than the IPv6 releases for the same model. Open the RAR and read the image header or any notes to identify the release. Use it for recovery or downgrade via the web interface, TFTP or a serial console. Make sure the device really is a T1H variant, because neighbouring P-660HN variants use incompatible images.
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 →