Based on your request, it seems you are looking to download a firmware dump or configuration file for a ZyXEL P-660HN series router Go to product viewer dialog for this item.
Note that .rar is an archive format; you will likely need software like WinRAR or 7-Zip to extract the actual firmware files inside. Download ZYXEL P6601HN Dump rar
A file of this type (a "dump") usually offers the following technical features: Based on your request, it seems you are
Allows users to restore a "bricked" router that will no longer boot by flashing the dump directly to the chip via JTAG or UART interfaces. To help me narrow down the specific files
To help me narrow down the specific files you need, could you share: What is the on the sticker (e.g., P-660HN-T1 P-660HN-51 What is the hardware version (e.g., v1, v2)?