EnGenius ESR-9750

aka ESR-9750A, ESR-9750B (32MB RAM?)

Datasheet (on EnGenius Singapore website)

This hardware appears to be used by the Sitecom WL-303 and the WL-312. 

On the DD-WRT supported devices list as a WiP.

Specs
Platform Serial Num. = ? FCC ID = U2M-SR97908001 Industry Canada ID = ? CPU Type = Ralink RT2880 MIPS Rev = ? CPU Speed = 266 MHz Bus = ? Flash Type = ? Flash Chip = ? Flash Size = 4 MB Max Firmware Size = ? RAM Size = 16 MB RAM Chip = ? nvram Size = ? ETH chip1 = Ralink RT2880 Switch = IC+ Model? Port-based vlan = ? 802.1q vlan = ? Ethernet Port Count = 1-10/100-WAN 4-10/100-LAN Wired Standard = IEEE 802.3/3u Ethernet interface OUI = none specified boot_wait = ? bootloader = ? Flash Card Socket/Type = ? SD/MMC Mod Support = ? Expansion IF types = ? PoE = ? Power = 12VDC/1A Connector type/size = Barrel plug LEDs/Color = WAN/Blue, LAN/Blue, WLAN/Blue, Power-Status/Red Size = 167mm (L) x 108mm (W) x 25mm (H) USB = ? Serial Port = Yes JTAG Port = Yes Supported by TJTAG/Version = ? Supported by dd-wrt as of = wip dd-wrt K2.4 Support = ? dd-wrt K2.6 Support = ? Special Features = ? Radio Wireless Radio = Ralink RT2820 WLAN DSP processor = Ralink RT2880 Wireless interface OUI = none specified Antenna Connector Type = RP-SMA MIMO status = 2x3:2 Wireless Standard = IEEE 802.11b/g/n 802.11n = up to 300 Mbps 802.11g = 6, 9, 12, 18, 24, 36, 48, 54 Mbps 802.11b = 1, 2, 5.5, 11 Mbps WiFi Operating Frequency = 2.400/2.484 GHz Radio cor_rev = ? Radio Capabilities = ? Other Default IP address = 192.168.0.1 Default login user = admin Default login password = admin Default SSID = ? OEM = ? 3rd Party Firmware Support = ?