Motorola SURFboard SB4220 USB Cable Modem:With next generation A-TDMA technology built-in, the Motorola SB4220 Cable Modem offers incredible performance at a competitive price. Motorola’s next generation, SB4220 Cable Modem, incorporates the latest DOCSIS 2.0 Advanced Time Division Multiple Access (A-TDMA) technology that provides up to 30 Mbps upstream data rate in a DOCSIS 1.1 certified cable modem. Competitively priced, the SB4220 includes all the features of previous SURFboard Cable Modems, including USB connectivity, software upgrades available over the network, advanced RF design, top-notch field reliability and high-performance processors. The Motorola SB4220 features a user-friendly, convenient, top-mounted stand-by button. The stand-by button disconnects the USB and Ethernet connection to the CPE without disconnecting the cable modem from the RF network, providing security and flexibility. It offers both Ethernet and USB interface connectivity to help ensure compatibility with almost any PC or Macintosh network-ready computer system. Plus, the SB4220 is DOCSIS 1.1 certified which ensures advanced Quality of Service (QoS).