CenturyLink EQ-660HW

"45-401-000681" is silkscreened on the board.

This device is similar (but not 100% identical) to the ZyXEL P-660HW-D1 v2.
 * The firmware even identifies the device as a P-660HW-D1 v2.

Infineon branded CPU and Infineon branded wireless
 * (PSB7200ZDW, PSB1350AZGU, PSB3422).

The default SSID is ZyXEL_XXX where XXX is the last three hex digits
 * of the MAC printed on the label / the wireless interface MAC.