Planex GW-900D

Overview
A USB ID (2019:ab30) for a 881xAU Planex device (manuf. by AboCom) is in Realtek's vendor driver set for the 881xAU series..
 * The driver set for the ipTIME A2000UA indicates that it indeed used by the GW-900D (and the manuf. is noted as AboCom). It's probably an AU7520.

Links of Interest
Planex press release regarding release of their current 11ac line