USRobotics USR4523. Shaping performance: 1000 Mbit/s. Input current: 3 A, Power consumption (typical): 8.85 W, AC input voltage: 100 - 240 V. Dimensions (WxDxH): 6.54 x 3.9 x 1.14" (166 x 99 x 29 mm), Weight: 11.3 oz (320 g), Package weight: 24 oz (680 g)
US Robotics USR5686G. Modem speed: 56 Kbit/s, Interface: RS232 DB25. Certification: FCC IC UL CUL CE. Compatible operating systems: Server 2011, Windows 7 64 bit, Win 7, Server 2008 64 bit, Server 2008, Vista 64 bit, Vista, Server..., Minimum system requirements: Serial Port Phone Line Serial Cable. Dimensions (WxDxH): 6.5 x 3.75 x 1.3" (165.1 x 95.2 x 33 mm), Weight: 8.64 oz (244.9 g). Package dimensions (WxDxH): 9.5 x 5.71 x 2.6" (241.3 x 145 x 66 mm), Package weight: 26.4 oz (748.4 g)