Netgear RT311

Overview
The native OS for this device appears to be ZyNOS. The manufacturer is presumed to be ZyXEL.

The Samsung CPU used in this device has a P/N of S3C4500X01-QERO.

Links of Interest
Latest firmware (also usable with the Netgear RT314) Manual

Gadgets - uClinux on SOHO routers (good quality board images)
 * "Made in Taiwan", "Router-CBAD" and "P/N:45-401-000111" appears to be silkscreened on the board.

On Amazon (reviews)