Firmware archive labelled zyxel DEL1201-T10A B, which appears to be a ZyXEL DSL device with B as the variant or revision letter; the name states nothing more, such as flash chip or version. At 1.45 MB it likely holds a small serial flash image typical of DSL modems. Technicians use such dumps to rewrite the boot flash when a unit no longer starts. Confirm the model and hardware revision on the label, compare the image size with the chip fitted, and back up the original before programming.
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 →