Archive named for the P-660RU-T1v3s device, a duplicate marked (1), but its size is only 280 bytes, far too small to hold any firmware image.

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.

Firmware archive for the P-660RU-T1v3, a model string in the style of ZyXEL ADSL modems; note this is the v3 revision, not v3s, and the brand is not given in the name.

Firmware for a device identified as P660RU-T1v3s, with the tag 201512 suggesting a December 2015 build or dump.