Firmware package for the P-660RU-T1v3s, a model code matching ZyXEL ADSL modems of the T1 v3s hardware revision, though no brand appears in the name. At 1.95 MB this RAR is larger than other copies and may include extra files or a full flash dump. Use it to restore a unit with corrupted firmware, either through the bootloader or a direct chip programmer. Verify the hardware version label, read and save the existing flash, and compare file and chip sizes.
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 →