Also known as P-660RT EE (Eastern Europe). ZyXEL Prestige P-600 series.
Compact ADSL2+ modem with 1 Fast Ethernet port.
CPU: Trendchip (now Mediatek) TC3162 (TC3162L-LQ128), MIPS32 200 MHz (?)
RAM: Winbond, 8 MiB (?)
Flash: 2 MiB (?)
OEM firmware: ZyNOS
OpenWrt support: Unsupportable, too little flash + RAM.
ZyXEL P-660RU EE (review in Russian) (an enhanced device version with a USB port)