ZyXEL NBG4615 v2

Overview
"11340Y20NB0ZY02"... and "2012/0"... is silkscreened on the board in the FCC photos.

The RAM chip used in the FCC photos appears to be a Winbond W971GG6JB-25 (128MB).

ZyXEL EMG2306-R10A

Links of Interest
MediaTek's brief on the RT6856 SoC