US Robotics USR843453C External 56K V.92 Global Dial-up Business Modem x2 and ITU-T V.3 supports communication technologies of 56 Kbps / 33.6 Kbps / 28.8 Kbps Flash ROM preserves your investment. Now, features and upgrades can be added through a simple software download V.everything feature set ensures compatiblity with virtually any other modem by supporting the most comprehensive set of data and fax standards Courier provides secure access to corporate networks by preventing unauthorized access through password and dialback measures US Robotics Connections CD and other software included.