A fibre router (GPON FTTH ONT).
Board ID: YOOHOO
CPU: Broadcom BCM6818KFSB (bcm63xx), MIPS, 360 MHz
RAM: DDR SDRAM, 64 MiB
Flash: 32 MiB (AMD AM29LV320MT ?)
The device has 1x fibre connection + 4x Gigabit Ethernet ports + 2x phone sockets. Some variations also have Wi-Fi.