Firmware for the TP-Link TD-W8961ND wireless ADSL modem router, hardware version 2.1, in a 1.26 MB RAR. The repeated ok in the name suggests the uploader found it working, but no firmware version is given. Such images are used to recover a bricked router, either by writing the flash chip directly with a programmer or through a recovery method. Check that the hardware version on the device label reads 2.1, since firmware for other versions can leave the unit unusable.
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 @biosarchive. 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 →