D-Link DSL-2640U rev B2

On the OpenWrt wiki
 * Broadcom BCM6348SKFBG, ADSL2+ SoC
 * Broadcom BCM6301KSG, ADSL line driver
 * Broadcom BCM4318KFBG, 802.11g Wi-Fi
 * Broadcom BCM5325EKQMG, 10/100 Switch
 * This device appears to be known as the DSL-2640B in the EU and American markets, and the DSL-2640U in the Russian market

Based on the board appearance, label, and silkscreened text, ASUS is presumed to be the OEM of this device.

This device has a console port accessible on the back of the unit. This device may have an RP-SMA connector.