USRobotics USR5455

The default SSID appears to be USR5455 (it is the entry in the manual), though there are not many entries (only ~80) in WiGLE's database.

Specs
Platform Serial Num. = ? FCC ID = IXM-APGBR03, IXM-RTGBR03 Industry Canada ID = ? CPU Type = Broadcom BCM5354 MIPS Rev = ? CPU Speed = 240 MHz? Bus = ? Flash Type = ? Flash Chip = Macronix MX29LV320CBTC-70G Flash Size = 4 MB Max Firmware Size = ? RAM Size = 16 MB RAM Chip = Samsung K4S281632I-UC75 nvram Size = ? ETH chip1 = Broadcom BCM5354 Switch = N/A Port-based vlan = ? 802.1q vlan = ? Ethernet Port Count = 1-10/100-LAN Wired Standard = IEEE 802.3/3u Ethernet interface OUI = 00:14:C1 boot_wait = ? bootloader = ? Flash Card Socket/Type = ? SD/MMC Mod Support = ? Expansion IF types = 1x USB 2.0 PoE = ? Power = 9 VDC, 1.2 A Connector type/size = Barrel plug LEDs/Color = ? Size = ? USB = Yes Serial Port = 1 JTAG Port = 1 Supported by TJTAG/Version = ? Supported by dd-wrt as of = v24 sp2 - custom 13575 - 20091230 dd-wrt K2.4 Support = ? dd-wrt K2.6 Support = ? Supported by TomatoUSB as of = ? TomatoUSB K2.4 Support = ? TomatoUSB K2.6 Support = ? Special Features = same as USR5465, but no 4LAN/USB Radio Wireless Radio = Broadcom WLAN DSP processor = Broadcom BCM5354 Wireless interface OUI = 00:14:C1 Antenna Connector Type = RP-SMA MIMO status = ? Wireless Standard = IEEE 802.11b/g 802.11g = 6, 9, 12, 18, 24, 36, 48, 54 Mbps 802.11b = 1, 2, 5.5, 11 Mbps WiFi Operating Frequency = 2.4 GHz Radio cor_rev = ? Radio Capabilities = ? Other Default IP address = ? Default login user = ? Default login password = ? Default SSID = USR5455 OEM = USI 3rd Party Firmware Support = DD-WRT

Links of Interest

 * DD-WRT builds for the USR5465 / USR5455 on the DD-WRT forums